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Operator
Good day, and thank you for standing by. Welcome to the GlobalFoundries conference call to review first quarter of fiscal year 2022 financial results conference call. (Operator Instructions) Please be advised that today's conference is being recorded. (Operator Instructions) I would now like to hand the conference over to your speaker today, Sukhi Nagesh, Vice President of Corporate Development and Head of Investor Relations. Please go ahead.
Sukhi Nagesh - VP of Corporate Development & IR
Thank you, operator, and good afternoon, everyone, and welcome to GlobalFoundries' First Quarter 2022 Earnings Call. On the call with me today are Dr. Tom Caulfield, CEO; and Dave Reeder, CFO.
A short while ago, we released GF's first quarter 2022 financial results press release, which is available on our website at investors.gf.com, along with today's accompanying slide presentation. This call is being recorded, and a replay will be made available on our Investor Relations web page.
During this call, we will present both IFRS and adjusted non-IFRS financial measures. The most directly comparable IFRS measures and reconciliations for adjusted non-IFRS measures are available in today's press release and accompanying slides. I would remind you that these financial measures are unaudited and subject to change.
Certain statements on today's call may be deemed to be forward-looking statements. Such statements can be identified by terms such as believe, expect, intend, anticipate, and may. You should not place undue reliance on forward-looking statements. Actual results may differ materially from those forward-looking statements, and we do not undertake any obligation to update any forward-looking statements we make today. For more information about factors that may cause actual results to differ materially from forward-looking statements, please refer to the press release we issued today as well as risks and uncertainties described in our SEC filings, including in the section under the caption Risk Factors in our annual report on Form 20-F filed with the SEC on March 31, 2022.
We will begin today's call with Tom providing a summary update on our end markets, capacity expansion and technologies. Following which, Dave will provide details on our first quarter results and also provide second quarter guidance. We will then open the call for questions. (Operator Instructions)
I will now turn the call over to Tom for his prepared remarks.
Thomas H. Caulfield - President, CEO & Director
Thank you, Sukhi, and welcome, everyone, to our first quarter 2022 earnings call.
We started the new year building on the strong momentum from last year and delivered record Q1 results that are well ahead of our outlook we provided in February. Amidst the backdrop of sustained and robust demand, our global team, 15,000-strong, continues to overdeliver despite inflationary, geopolitical and pandemic-related challenges. This type of execution builds upon itself and creates a foundation of confidence, confidence that we convey to our customers and partners. And as a result, builds their trust in GF. So a huge shout out to the entire GF team, all 15,000 of you. Great Q1. Let's together deliver another record quarter in Q2.
In addition to strong manufacturing and operation performance, I am pleased to report that our commercial teams continue to win new accretive designs with both new and existing customers. Customers that are winning in their markets with GF solutions. We continue to see strong demand across all of our strategic and secular growing end markets with the majority of that demand built upon GF's differentiated process technology.
In fact, Q1 single-source wafer shipments grew 48% year-over-year. Also, and is largely expected, we see some areas of the market normalizing; notably low-end handsets and PCs. As previously communicated, neither of these markets are areas of strategic focus for GF, with the exception of a few applications in these end markets that require unique and differentiated technology.
In summary, the demand environment is largely as we expected, and our revenue visibility remains strong. It's backed by multiyear long-term customer agreements. We remain fully sold out in 2022 and 2023, and we are increasingly confident that we can deliver the long-term business model we outlined and articulated in our road show.
With that as context, let's move on to our first quarter results. We are pleased to report another quarter of record results for the company. First quarter revenue grew 37% year-over-year and was driven by year-over-year increases in both wafer shipments and ASP. This, coupled with strong operational execution across all our fabs, resulted in significant improvements to adjusted gross margin, which increased to 25%. This is an 18% point improvement from the year ago quarter. And as a result, we reported first quarter adjusted earnings per share of $0.42, which is $0.15 higher than the high end of our guidance and more than double the $0.18 adjusted earnings per share we reported last quarter. Dave will discuss in more detail our financials later in his commentary.
But first, let me provide a summary of our first quarter revenue by end markets, starting with smart mobile devices. Smart mobile devices represented approximately 50% of first quarter revenue and it grew 20% year-over-year. This growth was primarily driven by the continued transition of the market for more feature-rich handsets, which is happening concurrently with the transition to 5G connectivity.
Our 8SW platform is a great example of our differentiated technology. It is the industry's first and leading 300-millimeter RF SOI platform with best-in-class switch and L&A performance. It delivers superior data rate, range and battery power. Additionally, we are also seeing strong double-digit year-over-year growth for RF transceiver, mobile image sensor and specialty power solutions. Our portfolio of technologies, which includes 8SW, 12 LPRF, 22FDX, and both 55- and 28-nanometer BCD light enable our customers to design products that win in their markets, which in term helps us participate in the most attractive segments in this end market.
Next, our communications infrastructure and data center end market, which comprised approximately 17% of first quarter revenue, grew approximately 80% year-over-year. Growth was driven by a combination of higher shipments, higher ASPs and better mix. Data center demand, especially for 2-chip product solutions, is starting to ramp and GF is well positioned to grow in this market.
We also saw strong demand from our communications infrastructure customers who leverage GF's IP-rich and differentiated 12-nanometer RF in silicon germanium solutions. The robust demand in cellular infrastructure is due to the transition from 5G MIMO to 5G millimeter wave. This transition increases available spectrum, bandwidth and capacity, all of which culminates into improved user experience.
In the quarter, we also announced our second-generation silicon photonics platform. This is gardening strong and broad customer traction. Our branded photonics platform is the industry-leading monolithic solution for optical interconnects, serving switches, GPUs, accelerators and pluggable transceivers. This platform also provides the next level of RF performance for 800-gigabit transceivers.
The best proof of this leadership solution is in our customer set. Industry leaders such as NVIDIA, Broadcom, Marvell and Cisco are designing high-bandwidth, low-power optical interconnects for high-performance computing, networking and cloud data centers using GF Fotonix and silicon germanium platforms. Further, our differentiated photonics platform has been extended to the quantum computing market and is gaining significant traction with some of the most innovative startups.
For example, PsiQuantum is designing and building the world's first usable, scalable quantum computer on our photonics platform. Our silicon photonics business, which is already has a majority share position, is on track to grow over 50% in 2022. In summary, we believe the communications infrastructure and data center end markets remain on track to be one of our fastest-growing end markets this year.
Moving on to our home and industrial IoT end market. Revenue was approximately 17% of GF's total first quarter revenue, and it grew 55% year-over-year. The strong growth in this end market was driven by higher demand, varying ASPs and richer mix. GF's strength in feature-rich technologies that are focused on superior wireless connectivity performance at the lowest possible power consumption has enabled our strong growth in the home and IoT end market. This is an end market that continues to experience secular growth with the ongoing global proliferation of smart-connected devices.
Now within this end market, our wireless connectivity solutions saw significant growth due to the accelerated adoption of 22FDX technology for WiFi 6 applications. We are also seeing strong traction for IoT microcontrollers that feature nonvolatile memory for a number of smart card applications, such as digital payments, access control and electronic IDs.
In addition, growth in this end market is being driven by our differentiated power in analog technologies for applications such as building automation and security. The trend of integrating wireless, secure compute, analog and multiple sensors is squarely playing to our strength and is at the heart of this strong home and IoT growth for GF. We are on track for this end market to be the fastest growing for GF this year.
Touching next on automotive. Revenue in this market was approximately 4% of our total first quarter revenue and grew approximately 170% year-on-year. As we previously indicated, our growth in this market will be lumpy as we are constrained by how quickly we can build capacity. Now as new capacity comes online, we expect our revenue growth to accelerate in this end market.
In Q1, we also began to ramp some exciting new products that have been developed over the last few years that enable automobile electrification and safety. We're also seeing continued ramp of our sole-source business with a top-tier automotive radar IDM that will drive significant growth over the next several years. Our pipeline of design wins in automotive remains robust. This is driven by, one, the acceleration of plans for EV production; and two, automakers desire to recover lost vehicle shipments during the pandemic. These 2 together will pull forward demand for advanced automotive architectures. And it's these architectures that have higher semiconductor content per vehicle and the majority of which is serviced by feature-rich technologies across GF's portfolio.
Examples range from our 130 BCD technologies that enable advanced battery management systems to our best-in-class 22FDX technologies that are quickly becoming the market standard for millimeter wave solutions. They're at the foundation to enabling safety and the future autonomous driving.
Next, and as expected, our compute end market declined year-over-year, and it comprised approximately 2% of our total first quarter revenue and expect this market to be less than 5% of our total 2022 revenue. As mentioned earlier in this call, our investments in this market are focused upon areas which we can provide differentiated technology. Specifically, we have targeted mixed signal, power management and companionship solutions. From a percent of total revenue perspective, we expect Q1 to be the trough for this end market, and that it will steadily improve throughout the year.
I would now like to provide a brief update on our ongoing capacity expansion plans. In Q1, wafer shipments increased 14% year-over-year. We are particularly pleased with the output from our Dresden fab where wafer shipments increased more than 50% year-over-year. In short, we are executing to plan and converting our capacity investments to the wafer output required to satisfy our long-term customer agreements. We are on track to increase wafer output more than 10% year-over-year.
Also as committed and despite COVID-related challenges, our new fab construction in Singapore is largely progressing to plan, and we are on schedule to install tools at the beginning of Q3, with production ramping in the first half of 2023. In addition to our ongoing capacity expansion, we continue to make solid progress towards enhancing our differentiated technologies.
For example, we completed six technology qualifications in the first quarter, including new features that we added to our industry-leading 8SW RF SOI platform for front-end modules and mobile handsets. In addition, we also released our enhanced SiGe high-bandwidth technology in the quarter. We are pleased to report we have nearly 20 product tape-outs on our next-generation photonics technology platform in the first quarter alone of this year, with more than 30 customer tape-outs scheduled for this year. This reflects the rapid and broad adoption of our differentiated photonics technology.
And finally, given the unprecedented demand on our 22FDX platform, we have commenced a technology transfer from Dresden, Germany to our Malta, New York facility to establish our second 22FDX corridor.
To summarize, I'm pleased to report a quarter of solid execution as we continued to demonstrate strong momentum across our business and are making significant progress towards our long-term business model. With that, let me turn the call over to Dave to provide the financial details for the first quarter and also provide you with our guidance for the second quarter.
David W. Reeder - CFO & Senior VP of Finance
Thank you, Tom.
Our first quarter results exceeded the high end of the financial range we provided in our last financial update. First quarter revenue was approximately $1.94 billion, an increase of 37% year-over-year. We shipped approximately 625,000 300-millimeter equivalent wafers in the quarter, a 14% increase from the year prior period. Average selling price, ASP per wafer increased approximately 19% year-over-year, driven by ramping long-term customer agreements with better pricing, an overall very constructive transactional pricing environment as well as continued improvement in product mix.
Wafer revenue from our end markets accounted for approximately 90% of total revenue. Nonwafer revenue, which includes revenue from reticles, nonrecurring engineering, expedite fees and other items, accounted for approximately 10% of total revenue for the first quarter, consistent with our expectations. For the remainder of the call, including second quarter guidance, I will reference adjusted metrics, which exclude stock-based compensation.
For the first quarter, we delivered adjusted gross profit of $490 million, which translates into approximately 25.3% adjusted gross margin. The 18 percentage point year-on-year improvement was driven by better fixed cost absorption, higher ASPs and improved mix. Approximately 70% of this improvement was attributable to ASP and mix with the remaining 30% attributable to volume-related fixed cost absorption.
Operating expenses for the first quarter were better than expected and represented approximately 9% of total revenue. R&D for the quarter was flat sequentially at approximately $122 million, while SG&A came in at about $89 million. Total operating expenses were $211 million, excluding $32.6 million of stock-based compensation. Q1 total operating expenses increased approximately $17 million from a year ago, largely due to investments in developing new features and IP as well as customer enablement for our technology platforms.
GF delivered operating profit of approximately $279 million for the quarter which translates into 14.4% adjusted operating margin, approximately 21 percentage points better than the year ago period and $77 million higher than the high end of our guidance range. First quarter net interest expense was approximately $28 million, and we incurred a tax expense of approximately $29 million in the quarter.
We delivered first quarter adjusted net income of approximately $232 million on a diluted share count of 549 million shares, resulting in adjusted earnings of $0.42 per share. We delivered record first quarter adjusted EBITDA of approximately $698 million. Adjusted EBITDA grew $404 million year-on-year on $522 million of incremental revenue growth, a 77% fall-through rate.
Let me now provide some key balance sheet and cash flow metrics. Cash flow from operations for the quarter was $845 million and included approximately $475 million of customer prepayments and capacity access fees. Gross CapEx for the quarter was $643 million or roughly 33% of revenue. We ended first quarter with approximately $3.3 billion in cash and cash equivalents, an increase of more than $2.6 billion from the prior year period.
Before I transition to Q2 guidance, I want to briefly touch upon current market concerns regarding inflation and its impact to our business. Like others, we are seeing some inflationary headwinds in our business especially with respect to materials, energy and labor costs. We estimate the impact of these inflationary costs to our full year results to be less than 2% of revenue.
Since 2021, our teams have worked diligently to build certainty into our business model. You've seen the results of the commercial work and our revenue visibility, driven by our long-term agreements. Operationally, we've also worked to build certainty into the business. With respect to materials, we have signed many long-term, multiyear fixed cost supply agreements for the materials needed to deliver customer commitments. With respect to energy costs, we have a rolling 24-month hedging program that helps us mitigate significant movements in the energy markets.
With respect to labor, we have variable pay-for-performance programs that reward our employees for excellent performance, like the performance delivered in the first quarter of 2022. Additionally, we have monthly rolling FX hedging programs that help mitigate significant movements in currency pricing. And finally, we have an active and robust pipeline of manufacturing cost savings initiatives that have historically delivered annual savings of more than $200 million. We believe the aggregate impact of all of these programs will largely offset the forecasted inflationary headwinds in 2022 and that the net impact to the P&L will be minimal.
Next, let me provide you with our outlook for the second quarter. We expect total GF revenue to be between $1.955 billion and $1.985 billion. Of this, we expect nonwafer revenue to be about 8.5% of total revenue. We expect adjusted gross profit to be between $503 million and $531 million. We expect adjusted operating profit to be between $272 million and $305 million.
Excluding share-based compensation for the second quarter, we expect total OpEx to be between $226 million and $231 million. We expect the sequential increase in operating expenses to primarily be driven by higher labor expenses and certain enterprise IT projects. At the midpoint of our second quarter guidance, we expect share-based compensation to be approximately $60 million, of which, roughly $30 million is related to cost of goods sold, and approximately $30 million is related to OpEx.
We expect net interest expense for the quarter to be approximately $25 million and tax and other expenses to be roughly $26 million. We expect adjusted net income to be between $235 million and $265 million. We expect depreciation and amortization for the quarter to be about $425 million, of which 90% is related to cost of goods sold. On a fully diluted basis of approximately 550 million shares, we expect adjusted earnings per share for the second quarter to be between $0.43 and $0.48. We expect adjusted EBITDA to be between $705 million and $745 million. For 2022, we expect total gross CapEx to be approximately $4 billion as we continue to invest in partnership with our customers to deliver the capacity necessary to support our contracts.
In summary, strong operational execution enabled us to deliver first quarter results that were significantly better than the high end of our guidance range. Our demand visibility remains strong, supported by our long-term customer agreements and we expect to deliver progressively better financials quarter-to-quarter throughout the year as we continue to methodically execute our plans.
With that, let's open the call for Q&A. Operator?
Operator
(Operator Instructions) Our first question comes from Harlan Sur with JPMorgan.
Harlan Sur - Senior Analyst
Congratulations on the solid results and strong execution by the team. There's a lot of cross-currency in the end markets whether COVID supply chain disruptions, as you mentioned, some pockets of weakness. But overall, it appears that demand continues to outstrip supply across most end markets. So as you guys look at your business, talk to customers, given your backlog profile, what are you guys seeing out there? And then it looks like capacity growth target, Tom, was revised higher than 10% plus for this year. I'm just wondering, does the team also still anticipate 10% ASP growth as well?
Thomas H. Caulfield - President, CEO & Director
Yes. Let me start, and David, you could add some commentary. Look, I think you said it right. The demand environment is still strong, but I think we have to put this in perspective. We'll talk about the small pockets, I'll reiterate some of the small pockets of softness we're seeing.
When we started this year, we had demand that was 25% higher than the capacity weekly for sale. And so we are way in over demand situation. So I think holistically for the industry, it's not like you're either in supply alignment or you're not. There's ranges of that. And we were really, as an industry and in particular, GF having a lot more demand than we can satisfy.
So we don't have high exposure to the PC market. We don't have high exposure to the low-end handset market. So a little bit -- the softening that we are seeing there, we're taking as an opportunity to close some of that big gap that we started this year with to feed the customers that are more strategic end markets for us.
David W. Reeder - CFO & Senior VP of Finance
Yes. And let me just add on, Harlan. We're expecting total wafer shipments to grow kind of high single digits, 10-ish percentage in -- throughout 2022. And at the midpoint of our guidance, specifically for second quarter, we guided up 22% year-over-year. And we're expecting every end market to participate in that growth year-over-year in second quarter with the exception of personal compute, which we expect to really have troughed in the first quarter of '22, and then we expect it to grow sequentially.
Harlan Sur - Senior Analyst
Do You guys still expect roughly ASPs to grow 10% this year?
David W. Reeder - CFO & Senior VP of Finance
Year-over-year, we expect ASPs to grow about 10% year-over-year, correct, for the entire year. Obviously, they grew a little faster in the [first quarter].
Harlan Sur - Senior Analyst
Great. And then on my second question, I appreciate the insights there. More specifically on your mobile business, your customers have been impacted by COVID-19 lockdown disruptions. This is impacting the premium end of the market. You've got weak China domestic smartphone demand, which is impacting the low end of the segment. So on the strong June quarter guidance, Tom, given the commentary around weakness in mobile -- so is your mobile business sustaining sequentially given the supply-demand gap by some of the customers in those segments?
Or is your mobile business weaker sequentially in the June quarter -- and it's just the diversification in the business is just allowing you guys to reallocate capacity to your non-auto segments where we know that demand is still strongly outstripping supply.
Thomas H. Caulfield - President, CEO & Director
Look, I think we'd call it flat and sequentially in the kind of the high-end handset in that space. Again, the low end, where we didn't have a lot of exposure, we're reallocating. I think you have to think about for us in the mobility space is, one, we have high concentration there, and that's not as growing as fast because it's such a big base of some of the other important end markets to us. And then the second element of this is as we think about what the new features are, the transition of 5G and how -- our strong position there, we would actually get kind of more silicon for handset. And so we have a strong position in these high-end handsets, typically, handset manufacturers, brands that sell that range, we'll air whatever capacity they have to the high-end handset before the low end. And so that's what we're seeing at least in the demand to us. David, anything you'd add to that?
David W. Reeder - CFO & Senior VP of Finance
Yes, I think we see a continuation of the first quarter, Harlan. And that's -- in the RF front-end module, that's our 8SW RF SOI technology. We're really driving the transition from 4G to 5G there. So we're continuing to see sustained growth in that segment and particularly in that technology. In the image sensor processor side of the smart mobile devices, that's a space where GF's product solution includes the 22FDX platform road map that delivers optimized image sensing at optimal power as well as some other technologies that are growing pretty significantly on a year-over-year basis.
And then finally, we're seeing sustained demand on our specialty power. So that's our [Pemex] -- and that's where GF envelope tracking solutions and 65-nanometer and 22FDX provide real-time tracking and increased battery life for 5G sub-6 gigahertz solutions and really a road map to assemble tracking for the millimeter wave and the higher bandwidth solution.
So within smart mobile devices, there's subsegments within that, that are driving the transition from 4G to 5G, and that's an area of the market that we've specifically targeted that continues to perform for us.
Operator
Our next question comes from Vivek Arya with Bank of America.
Vivek Arya - MD in Equity Research & Research Analyst
There was almost a 100% fall-through on incremental gross margins for March on a sequential basis. And I'm curious, what specifically in mix helped you? And how should we think about gross margin progression for the rest of the year?
David W. Reeder - CFO & Senior VP of Finance
Sure. We've talked a lot, especially in the roadshow, about our fixed cost footprint and cost absorption. And so when you have an environment where you have very constructive pricing, you have higher ASPs that are worked in and contractually obligated into our long-term agreements. And then you're taking that same fixed cost footprint, and for just modest increases in cost, producing more units on a year-over-year basis. And that's the fall-through that you get.
So increased ASPs, reduced cost per unit, if you will, from a fixed cost absorption perspective, and you get this fall-through that really is what we talked a lot about in our roadshows for IPO. So we're executing on that plan. Now what do we expect going forward from a systemic perspective or a programmatic perspective? I think you can expect fall-through in the 60-ish percent range. That's the kind of variable fall-through of the business. And so that's the type of fall-through that you can expect going forward once we fully get our entitlement out of our fixed cost absorption.
Vivek Arya - MD in Equity Research & Research Analyst
Got it. Very helpful, Dave. And for my follow-up, I thought I heard you say CapEx of $4 billion. I thought it used to be $4.5 billion. So wondering why the change? What's the implication? Is it just the tight availability of tools? And just how does that impact your growth plans for this and next year?
David W. Reeder - CFO & Senior VP of Finance
Sure. So our growth plans for '22 and '23 remain on track. I think what we're seeing is a lot of what you're hearing in the industry and others are seeing across the industry is that our tool suppliers are, on average, late by around 30 days or so. And to put that into some real proof points for you. So to date, we have accepted receipt of about 150 tools, and about 15% of those tools are slightly more than 30 days late, and it's actually gotten a little worse as the year has progressed. So we expect that number to go from 15% to in that 20-ish percent range.
And so on a CapEx plan of roughly $4.5 billion, you slip about 30 days on that plan on 20-ish percent of your tools and what you'll calculate is something around $4 billion.
Thomas H. Caulfield - President, CEO & Director
And Dave, on the other end of that is when we built our plans, one, we had our purchase orders in early in this process for this capacity. So we're kind of front in line. And that's why we're not as impacted as, say, others may be. And we don't build plans without a certain level of contingency. And we're still -- while we've eaten through some of that contingency, this is why we're confident we will maintain our projected growth outlook.
Operator
Our next question comes from Ross Seymore with Deutsche Bank.
Ross Clark Seymore - MD
Congratulations on the strong results. I just had a question on the gross margin again. Maybe a separate way to ask it. How do you guys -- or I guess, was a surprise versus your guide? I know you built in a healthy amount of conservatism, and we all appreciate that. But the magnitude of the upside in this last quarter was just so significantly better than we thought. So Dave, I know you gave that 70-30 mix in the drivers before, but to you guys, what was the surprise?
David W. Reeder - CFO & Senior VP of Finance
I think to us, what the surprise was, Ross, was the continued fixed cost absorption. As we produce more units on our existing footprint, we continue to get more and more productive. And the team across the world is just continuing to really execute from a productivity perspective, and we're seeing that in our fixed cost absorption. That said, ASPs came in a little bit better. Mix came in a little bit better. So I would say from our guidance perspective, everything improved a little bit, but the area that we kind of consistently under call is really fixed cost absorption.
Ross Clark Seymore - MD
Got it. And I guess just a follow-up is sticking on the gross margin line. Does this do anything to either accelerate the timetable to your long-term target of a 40% gross margin, give you more confidence in it or potentially even raise where you think the target can be? And I know it's a number of years down the road, but what is the performance you've delivered over the last couple of quarters now due to your confidence in that longer-term target?
David W. Reeder - CFO & Senior VP of Finance
I think I'd reiterate what Tom said in his opening statement, which is really we have increased confidence in our ability to achieve our long-term targets. I think it'd be prudent at this point to stick with those targets, but we are becoming more and more confident in our ability to deliver those long-term financial targets.
Operator
Our next question comes from Chris Danely with Citi.
Christopher Brett Danely - MD & Analyst
I guess just on the end markets, can you give us any sense of Q2 guidance by end market? And I guess, embedded in that, you've been posting some pretty nice sequential revenue growth, but it's dropping markedly in Q2. Is that just because of the weakness in enhancements in PCs? Or is there something else going on there?
David W. Reeder - CFO & Senior VP of Finance
Yes. I think obviously, we guide at the enterprise level. But when we look sequentially from Q1 to Q2 as well as Q2 '22 to Q2 '21, the areas that we've highlighted for growth this year continue to remain the areas that are driving outsized gains for us. And specifically, I'd point to home and industrial IoT, I would point to comms infrastructure and data center. And then on a year-over-year basis -- and a little lumpy because it's a smaller number, I'd point to automotive. And those segments of the market for us continue to perform. Those are the areas where we feel like we have tremendous differentiation, that we really targeted on our strategic pivot and we expect those areas to continue to perform.
Christopher Brett Danely - MD & Analyst
Got it. And I think earlier in the call, you guys mentioned that a while ago, demand was about 25% higher than what you could fill. How would you rate that metric now in terms of demand versus your planned capacity?
Thomas H. Caulfield - President, CEO & Director
Look, I would tell you the following. I would tell you that our book-to-bill ratio is still north of 1. And by the way, it's a lot closer to 1.5 than it is 1. I would tell you that sequentially, our backlog has increased 5% and 10% year-over-year. So when I think of getting caught up here, I'd like to believe we are, but those statistics would say not.
Operator
Our next question comes from Joe Moore with Morgan Stanley.
Joseph Lawrence Moore - Executive Director
I wonder if you could talk to the nonwafer revenue, the strength you're seeing there. You mentioned expedite fees. Is that something that is going to be repeated in the next few quarters? And then is there any other element of those nonwafer revenues that would be potentially lumpy going forward?
David W. Reeder - CFO & Senior VP of Finance
When we look at the -- nonwafer revenue was about 10% of total revenue in Q1. It was about a similar percentage in the year ago period. We guided it for second quarter of 2022 to be about 8.5% of total revenue. And when I look at the nonwafer revenue line, as you know, it includes reticles and NREs and expedite fees, I would say expedite fees, on a year-over-year basis as well as on a sequential basis, I would characterize it as kind of flattish, quite frankly.
I would say reticle line, that's the line with the most variability is that reticle line. And that's really -- that's really based upon when design wins ramp, when customers can get their design wins to us, when we can get in the queue to manufacture the reticles. So there's a lot of engineering that actually goes into that segment of the process as well as the NRE line. That's the nonrecurring engineering line.
So from that perspective, I'd say no real surprises to us on the nonwafer revenue line, either in Q1 performance or in the second quarter guide.
Joseph Lawrence Moore - Executive Director
Great. And then in terms of -- it sounds like you definitely have robust backlog coverage kind of through the year. But in these small pockets, if some of the more negative economic scenario start to play out and you see those small pockets of weakness in areas like phones get bigger, how quickly -- I assume there's a lot more demand for wafers from other markets. You talked about autos, the challenge of bringing up capacity. How quickly can you kind of move those wafers over to other markets, if that indeed becomes something you need to contemplate? I realize that's not where you are today.
Thomas H. Caulfield - President, CEO & Director
I think one of the biggest elements of our pivot of our company that we talked about in the roadshow in 2018 is not just the markets we focused on, but also to create fungibility in our capacity; how we invest, how we think about our capacity. And so it's fungibility, and we have corridors of capacity that we can build in more than one location. Within locations, we try to make that capacity we put on fungible for a couple of different nodes and features.
And so the specificity of any given opportunity has to be really what's being taken down versus what is going up. There may be opportunities where the fungibility is not as high as we'd like it to be. But we've planned this into our business. It's part of some of how we manage supply chain, both globally and locally, is to create capacity that we could fund. It's not just a one-for-one substitution of a particular node with a particular feature.
Operator
Our next question comes from Chris Caso with Raymond James.
Christopher Caso - Research Analyst
Yes. A question about some of the capacity additions in the context of what you said about the auto market and that revenue being lumpy because you're still in the process of adding capacity there. Could you give us some sense of in which end markets we expect capacity expansion to be the greatest over the next few quarters? I'd imagine that the comments that you had about the end markets you expected to grow this year should be paired up with the areas and the processes in which you're going to be investing capacity this year?
David W. Reeder - CFO & Senior VP of Finance
Sure. Well, as we've stated, we've got a CapEx plan of about $4 billion this year. I'm going to use some rough and tough numbers here, but about half of that CapEx is really related to our module 7H in Singapore, that's the 450,000 annual wafers that we're bringing online towards the end of this year, but really starting to start to produce some real revenue next year. That facility, it will deliver 40-nanometer all the way up to 90-nanometer. It's a sister facility to the one right next to it, and so it helps free up some bottleneck capacity in its sister facility.
So you're going to see investments in those specific corridors. We've got investments in our 22FDX corridor, which is significantly oversubscribed. And we're also increasing capacity in our FinFET corridor. So I would say if you looked at that $4 billion, I would say, it's skewed a little bit more heavily towards 22 through 65. And then, of course, some capacity increases all the way down at 12-nanometer in the FinFET corridor as well as some higher technologies that are specifically asked for from the market.
Thomas H. Caulfield - President, CEO & Director
Yes. Let me maybe a little bit of color around that, too. I think it's worth noting. GF doesn't put capacity on for GF. GF puts capacity on for our customers. So when you think of our market intention, these growth markets that are attractive to us, we lined up not only our capacity, but we line up our long-term agreements to that capacity. And so you're absolutely right. It's all self-fulfilling. Where you hear us in these end markets, where we have secular growth that we've concentrated on, that's where we add capacity, that's where we've signed up a customer's long-term agreements because that's the capacity our customers want. It's not capacity we put on for GF.
David W. Reeder - CFO & Senior VP of Finance
Tom, that's a great point. And it's worth noting now that our customers have now signed up for more than $3.5 billion of customer funding. That's prepayments and access fees specifically to bring online that capacity that they desperately need.
Christopher Caso - Research Analyst
That's helpful. As a follow-up, I wonder if you could address some of these issues of what's been referred to as structural underinvestment in the nonleading-edge nodes. One of your customers was referring to that last night. And I guess we've been hearing it for a while, Tom, you've been talking about that for a while about structural and your investment. Is there any way to put any numbers on that?
And I think in the context of people being worried about macro conditions and end demand, getting a sense of what the real gap is between supply and demand in the markets you serve would be helpful.
Thomas H. Caulfield - President, CEO & Director
Yes. I think, first, let's talk about the capacity that's being put on in the segments we play. And just to make it simple, say 12-nanometer and above. When we look at how we see the market growing, in the high single digits, and when we look at capacity, that's not only been announced, but you actually see kind of activity going on, we think capacity is not -- is may be matching the kind of growth rates we want in the industry. But that doesn't account for the fact that there's still a big gap.
And I think that's why you hear about continued underinvestment and it's going to take a while to balance all of this. I think that puts a little bit of resiliency in our business against any temporary softening in -- from a global macro event. But we do not see in the areas we play a large amount of capacity being put on relative to closing the gap to the demand and growing with the demand. And Dave, maybe a little bit on the IDC report, we were just looking at it.
David W. Reeder - CFO & Senior VP of Finance
That's right, Tom. It's not just us that see the data the same way. I think IDC recently released a report maybe in the last couple of months that show kind of the long-term utilization of the industry. And I think depending on which year you look at, and it goes from '21 all the way through '25, I think the lowest utilization rate was something like 96% and I think it went all the way to 105% over demand or not enough capacity. And so it's not just GF that sees it this way, this kind of structural mismatch or matched at best; I think there's others in the industry that are seeing similar things.
Thomas H. Caulfield - President, CEO & Director
And some of the lumpiness of capacity in the past was off a smaller base. So when you added incremental capacity, it meant much more capacity. When we get to the industry to the size we are today, the incremental capacity is not as significant. And so this idea of we have to build a certain increment, it makes it a little bit more than you need and it has to get digested in demand. The bigger we grow as an industry, the less that you'll see that phenomenon.
Operator
Our next question comes from Mehdi Hosseini with SIG.
Mehdi Hosseini - Senior Analyst
Yes. I'm just trying to better understand how the mix is impacting your top line and gross margin. And to that extent, if your ASPs were up by 28% year-over-year and 5% Q-over-Q, can you perhaps qualitatively or quantitively help me understand how this ASP being impacted by the change in the mix.
Thomas H. Caulfield - President, CEO & Director
David, you go first and then I'll add in.
David W. Reeder - CFO & Senior VP of Finance
Sure. One, let me just provide some clarification. ASPs year-over-year were up 19%. And volume was up 14%, and that's specifically first quarter '22 to first quarter '21. When we look at our ASPs, I think really the underlying question that you're really getting at, and I'm going to infer a little bit here, is gross margin. And really, when you look at ASPs and gross margin, what you're really asking is how differentiated is your solution, because the more differentiated you are, the more value that you create, well, the more value that you can capture.
And so I think there are -- we don't specifically guide by end market segment profitability. But I do think that you can look at some milestones, you can look at some proof points and you can point them directionally towards increased profitability. I think one would be single-source design wins in single source revenue. So as Tom mentioned in his commentary, single-source revenue grew year-over-year. That's Q1 2022 to Q1 '21, 48%. So single-source revenue is about 2/3 of our total GF revenue. Single-source design wins, about 80% of our design wins are single source.
And so regardless of which technology platform you're looking at for GF, whether it's FDX or SiGe or RF SOI and the other platforms that we have, the more content, the more value that GF brings, the better the ASP, the better the gross margin. Tom, is there anything you'd add to that?
Thomas H. Caulfield - President, CEO & Director
Yes. That's exactly where I was going to go. I think this idea that the leading indicator is design wins, and that's running at an 80% -- at least it was -- we talked about it in the roadshow last year. And now you're starting to see the revenue flow through to that higher bar of single-source business, which is typically are bread and butter in our more accretive business.
Mehdi Hosseini - Senior Analyst
Yes. Actually, you frame my question better than I could have framed it. And the point here is the value created, and that's some of the specialty substrate that you offer your customer, and you're a single source. So as I look into next year, that mix probably would increase, SiGe would increase, maybe some silicon photonics with the start materializing. And I think that's when the concern over excess supply for bulk silicon at or above 12-nanometer would go away because it's just a mix shift that is going to accelerate into next year. Is that the right way to think about the model?
David W. Reeder - CFO & Senior VP of Finance
Yes. The way that we think about our model is we want to bring differentiated solutions to the marketplace, and we believe we have some real franchises that are differentiated. And so as our single-source business grows, as our design wins grow in single-source, we drive a higher penetration of single-source through our business, that becomes more accretive to that. And then, of course, we take those higher ASPs and that higher value creation, and we spread them over the same fixed cost footprint, which enables us to get fixed cost absorption, which creates the confidence that we have in our model and our confidence that we can deliver our long-term financial model.
Operator
Our next question comes from Matt Bryson with Wedbush Securities.
Matthew Stevens Bryson - SVP of Equity Research
I want to touch upon, I think, something Mehdi was asking about and also Chris. In terms of new technologies, with FDX, was it always the plan to start a second corridor in Dresden? Or did you pull that forward? It sounded like there's more demand there and potentially, that's a greater portion of your mix moving forward than you might have planned? And am I right in assuming that at least has some positive implications for margins? And then similarly, when you're talking about silicon photonics and revenue doubling this year, is there a point where you see silicon photonics becoming a meaningful portion of revenue? And then again, at that point, am I correct in assuming that has some positive implications on the gross margin side?
Thomas H. Caulfield - President, CEO & Director
Yes. Let me start, Dave, and you can add. Let's start with the silicon photonics. We have a healthy market share in silicon photonics. It's about a $250 billion...
David W. Reeder - CFO & Senior VP of Finance
Million.
Thomas H. Caulfield - President, CEO & Director
$250 million, sorry, segment. And we see that growing to $1 billion or so over the next 5 years. And if anything, we see more market share in that, not less. And so that is an opportunity for us for both growth and more differentiated profitable growth. You said about FDX and moving the corridor is actually it's from Dresden to New York. It's not the other way around. And you say, was that always the plan?
Look, our strategy for our company is for wherever it makes economic and capital expansion sense to have at least 2 sites to be able to build the same type of capability. And so we always had a plan somewhere we want to put 22FDX. The question is at any given time, where is the right place to put that. And today, our Fab 8 facility represents a great opportunity that best use the lithography capability that defines the features of the technology. It's the next best place for us to put and build that second corridor here.
And so when we think about it, again, it's not just -- we need capacity. We think about it in a thoughtful way where we can have our supply chain balance and leverage our assets around for fungibility and to give our customers second sourcing within a single-source.
David W. Reeder - CFO & Senior VP of Finance
Yes. I think I'd just add that, look, our FDX platform is an SOI platform that's also similar to kind of our RF SOI platform. Those are 2 platforms for us, where we have real franchises. We are increasing capacity pretty significantly in the future on FDX to be able to satisfy the demand there. And then as Tom mentioned, on the silicon photonics side, we have the majority share in that market. We're the only one with a monolithic integrated solution in that space, and we have the majority share in roughly what's a $250 million market today, and we expect that, that market grows to roughly $1 billion by 2026. We expect our share to still be a majority share, if not higher than where it is today. So with the customers that we're engaged in, in that space, we're optimistic not only for FDX, but also for silicon photonics for the future.
Operator
Our next question comes from Krish Sankar with Cowen and Company.
Krish Sankar - MD & Senior Research Analyst
Tom, I just had a big picture question first. You've been in the semiconductor industry long enough and you've seen many cycles. So let's just assume there is a macro correction or a recession. I'm kind of curious, where would we see it first in your -- in GlobalFoundries business? Would it be smartphones, auto, IO team? Where would you see it first? And then I had a follow-up.
Thomas H. Caulfield - President, CEO & Director
Yes. So look, never getting into a debate, will it be or it won't be a cycle. I think we could talk about the cycles. If it is, it's going to be a macroeconomic-driven event. It's probably going to be shorter in duration and less in depth given the -- how tied semiconductors are to the world economy. I think where you're going to see -- first, would be a consumer-led. It would be a consumer-led event for a macroeconomic event and then it would be consumer-led on the semiconductor side. And I think that touches a lot of the end markets we spoke about right?
Krish Sankar - MD & Senior Research Analyst
Got it. Got it.
David W. Reeder - CFO & Senior VP of Finance
And if I could just chime in. When I think about future visibility, because there's an element of this question that when I get it, I think about future visibility, right? Well, 2022, Tom mentioned that lead times extended sequentially. They've actually extended year-over-year and sequentially, book-to-bill closer to 1.5 than it is to 1. And then, of course, our LTAs, which we continue to sign and renew and our customers continue to provide funding in their balance sheet, access to their balance sheet to put capacity on. More than $3 billion now of their balance sheet at work to be able to deliver capacity increases that the market needs.
And so I look at this environment, and I think our visibility has never been stronger. I look at the customers and their engagement with us on increasing capacity. And I'm just really encouraged by the single-source design wins and the partnerships that we have with our customers across all of our technology.
Thomas H. Caulfield - President, CEO & Director
Which manifests itself if we have to deal with a macro event and some softening in the industry, we'll be able to work in a partnership with our customers on how we get through it together.
Krish Sankar - MD & Senior Research Analyst
Got it. Got it. Super helpful comment, David. And just as a follow-up, some of the foundries have spoken about raising prices for next year. And given the fact that you continue to sold out your LTAs and you spoke about the 10% ASP growth this year, how should we think about pricing for GlobalFoundries in 2023?
Thomas H. Caulfield - President, CEO & Director
David, you start and I'll add.
David W. Reeder - CFO & Senior VP of Finance
Sure. Well, as I just mentioned -- as I mentioned, we have incredible visibility into 2023 really on the back of those LTAs that we've signed. I think more recently, we've seen actions in the market by some of our peers to increase prices, specifically related to inflation, for example. That's something that we've started speaking to our customers about in early Q2, and we've been working with them on passing through inflationary costs so that they have time really to prepare to pass them on to their end customers as well.
Again, all centered around this partnership, they bet on us with their single-source design wins, and we're working in partnership with them to pass through some of these inflationary pricing and our contracts allow for that. Tom, anything you add?
Thomas H. Caulfield - President, CEO & Director
Yes. Remember how we got here. We talked about why was 2022 the year where you'd see the higher ASPs. And we said because we were striking those deals in 2021, and we wanted to give our customers a chance to balance their business to accept that. And this is no different here. As we're passing along these inflationary pressures, we're doing it in a way to give our customers the chance to mitigate it in their own P&L.
David W. Reeder - CFO & Senior VP of Finance
So I think that's the way you should think about pricing. We had a step-function increase in pricing and then the passing along of inflationary increases. And I think the market broadly has kind of communicated that those inflationary increases would be somewhere between 5% and 10%.
Operator
Our last question comes from Raji Gill with Needham & Company.
Rajvindra S. Gill - Senior Analyst
Congrats on the good results. I appreciate you kind of providing some commentary about the inflation and what that impact will be on your revenue. I think you said less than 2%. I was just wondering, what are the assumptions and how you're kind of getting to that number? I would assume it's based on, obviously, your long-term agreements and some sort of analysis based on those agreements. But just curious how you're kind of coming to the conclusion that if there is kind of persistent inflation, it would have like less than -- around the 2% impact on revenue.
David W. Reeder - CFO & Senior VP of Finance
Sure, Raji. When I mentioned 2% of total revenues, really the impact on the P&L itself. So in other words, how much impact would that have at the margins at the bottom. And so really, we were just communicating that as we had set up all these LTAs and contemplated these contracts, we were working in the background to lock in the materials at fixed volume, fixed prices. We were working on variability in our labor pay. And of course, we were hedging against some of the commodity exposure that you have on input prices into your energy sources.
And so from all those things, we believe that the inflationary pressures in 2022 will have a very minimal impact on our net P&L by the time you get to the bottom line. So that was the -- that was what we were communicating with that statement in our prepared commentary, is minimal impact from inflation, inflationary pressure on our bottom line in 2022.
Thomas H. Caulfield - President, CEO & Director
And that doesn't take into account passing any of that.
David W. Reeder - CFO & Senior VP of Finance
That does not take into account taking any additional inflationary increases on to our customers.
Rajvindra S. Gill - Senior Analyst
Right. I think it was an important point to make to try to address some of those investor concerns. And just for my follow-up, in terms of the gross profit fall-through, there was a question from a previous analyst that there was 100% gross profit fall-through from Q4 to Q1. You -- it looks like there's going to be about 81% gross profit fall through into Q2 based on the guide. And then you're kind of saying kind of moderating around 60-ish. Just curious, when you're looking at kind of a 60 number, does this kind of, I guess, factor in, obviously, your ASP agreements, a certain level of fixed cost absorption or mix shift. What would be kind of the upside driver to that 60% gross profit fall through because you've been exceeding that in the last couple of quarters.
David W. Reeder - CFO & Senior VP of Finance
The 60-ish percent number that I gave you is really a steady-state number. So that's over time, you can expect essentially variable fall-through, which ranges between 60-ish and 65%. I think near term kind of quarter-to-quarter, right? We've talked about this fixed cost absorption and where you can increase capacity and output significantly at a facility. I think Dresden in Germany would be a great example. You can increase output from a facility in a very meaningful way with a very minimal amount of input cost into that process. And so that's what's leading to the more near-term fall through. And then, of course, over time, the steady-state number that I was quoting kind of 60, 65-ish percent. That's the type of variable fall-through that you can expect once we hit steady state.
Operator
Thank you. I would now like to turn the call back over to Sukhi Nagesh for closing remarks.
Sukhi Nagesh - VP of Corporate Development & IR
Thank you, Shannon. Great. Thank you, everyone, for joining us this afternoon. We look forward to meeting you on the conference circuit this quarter. Have a good evening.
Operator
This concludes today's conference call. Thank you for participating. You may now disconnect.