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Operator
Good morning. My name is Charlene. I will be your conference operator today. At this time, I would like to welcome everyone to the fourth-quarter and year-end 2013 earnings conference call. All lines have been placed on mute to prevent any background noise. After the speakers' remarks, there will be a question-and-answer session. (Operator Instructions). Thank you. Mr. Bruce Hoechner, President and CEO, you may begin your conference, Sir.
Bruce Hoechner - President and CEO
Thank you, Charlene. Good morning, everyone. Thanks for joining us. The slides for today's call can be found on the Investors section of our website, along with the news release that was issued this morning. With me today are Dennis Loughran, Vice President, Finance, and Chief Financial Officer; and Bob Daigle, Senior Vice President and Chief Technology Officer.
I'll now turn it over to Dennis to dispense with the formalities. Dennis?
Dennis Loughran - VP of Finance and CFO
Thank you, Bruce. I would like to point out to all our listeners that statements in this conference call that are not strictly historical are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, and should be considered as subject to the many uncertainties that exist in Rogers' operations and environment. These uncertainties include economic conditions, market demands, and competitive factors. Such factors could cause actual results to differ materially from those in any forward-looking statements.
Also, the discussions during this conference call will include certain financial measures that were not prepared in accordance with Generally Accepted Accounting Principles. Reconciliation of those non-GAAP financial measures to the most directly comparable GAAP financial measures can be found in the slide deck for today's call that can be found on our website's Investor section.
I will now turn it back over to Bruce.
Bruce Hoechner - President and CEO
Thanks, Dennis. I'm very pleased to share with you today Rogers' fourth-quarter results. Our transformational initiatives, which began about two years ago, are clearly delivering meaningful outcomes. Our strong focus on technology innovations to benefit our customers, as well as our emphasis on operational performance and cost management, have helped us build what we believe is a sustainable advantage.
We finished the year well, with fourth-quarter revenues of $136.2 million, an increase of 9.7% over Q4 2012, which exceeded our guidance. For the full year of 2013, Rogers' revenues were $537.5 million, up 7.8% versus 2012 full-year results. Globally, we benefited from improving market conditions, propelled by growing demand for clean energy, Internet connectivity, and safety and protection applications. Higher sales, combined with rigorous cost management discipline, enabled us to complete the fourth quarter ahead of earnings guidance as well. Earnings per share for the quarter were up 40%, net of special charges, compared to Q4 of 2012.
Overall, it was another very good quarter for Rogers. We are pleased and encouraged by our ability to execute well on our strategies, which enabled us to deliver strong results.
Moving to slide 4, you will find an overview of fourth-quarter revenue performance by market. For the quarter, 61% of our sales fell into our strategic megatrend categories, as our focus on solving materials challenges in support of global megatrends continues to drive our growth. In Clean Energy category, sales were up 40% over Q4 of 2012, with growth across all major segments, including power modules for variable frequency motor drives, hybrid electric vehicles, and solar applications. In support of the growing global demand for Internet connectivity, we achieved 11% growth in revenues for the category.
The market for 4G LTE base station deployment continues to be very active, especially in China. Once again, growth in new applications enabling wireless connectivity for mobile Internet devices also helped boost demand for Rogers' high-frequency printed circuit materials. In mass transit, revenues were essentially flat compared to the fourth quarter of last year, as some programs for interior applications ramped down, offsetting growth in rolling busbars for rail traction power distribution. This market is typically program-driven and subject to fluctuations.
Demand for radar-based automotive safety systems continues to drive growth for Rogers' printed circuit materials. As the benefits of these systems in reducing fatal car crashes becomes increasingly evident, we expect consumer demand and governmental safety initiatives to continue to spur adoption of these systems around the world.
Turning to slide 5, let's look at the Company's performance by business segment. Our Printed Circuit Materials business delivered record sales for the quarter and overall record sales for the year. Sales were up 26% for the quarter over Q4 of 2012, and up 14% year-over-year, as momentum continued in the 4G LTE wireless infrastructure market, applications enabling wireless connectivity for mobile Internet devices, and the automotive safety sensors that we just discussed. In Power Electronic Solutions, we delivered another strong quarter, with revenues up 24% versus the fourth quarter of last year, as demand surged across all of our major clean energy application areas. As stated in our earnings release, we have restructured this business to better align with our markets and streamlined management.
Going forward, we will manage and report Power Electronic Solutions as one core strategic segment that is comprised of two main product lines -- Curamik direct-bonded copper substrates and RO-LINX power distribution systems products. This change supports a solutions approach to power electronics that we have adopted in this business.
High Performance Foams revenues were down 13% versus fourth quarter of 2012. Despite growth in many of its segments, the business reported year-over-year sales decline, due largely to changes in applications from mobile Internet devices, including changes in tablet device design, a shift to smaller tablets, and better production utilization at our customers, which resulted in a lower amount of total foam content in those devices. On the positive side, volume was up for the quarter in cushioning and ceiling applications for consumer electronics and hybrid electric vehicles, as well as advanced sport impact protection.
Moving to slide 6, we continue to build a market-driven culture across Rogers that is solutions-oriented, growth-focused and propelled by innovation excellence. Our investments in technology innovation continue. In the fourth quarter of 2013, we moved some of our Corporate Research and Business Development teams to the new Rogers innovation center located in Burlington, Massachusetts. Our innovation center is co-located with Northeastern University, enabling us to expand our collaboration with them, as well as other leading universities, on novel technologies that we believe will provide exciting business opportunities for Rogers.
For nearer-term opportunities, we continue to closely collaborate with our customers to build a high-quality pipeline of opportunities. At the end of the fourth quarter in our targeted megatrend categories of Clean Energy, Internet connectivity, and mass transit, we were tracking a cumulative total of 722 major design opportunities. Over 300 advanced to design-in phase of the selling process, and we moved 84 megatrend opportunities from design into production. The key message here is that we have a robust sales pipeline that we continue to refill, as we convert these projects into sales.
I'll now turn it over to Dennis to report our financial highlights.
Dennis Loughran - VP of Finance and CFO
Thank you, Bruce, and good morning again to everyone. As reported in the press release, we achieved earnings from continuing operations of $0.64 per diluted share, which includes a net special charge of $0.17 per diluted share. The special charge was related to the year-end valuation impairment of investment made in 2009, and in a startup company engaged primarily in the production of lithium battery-powered security applications for credit cards. The impairment reduce the carrying value of the investment from $5.1 million down to $500,000, and was the result of the pricing of a fourth-quarter 2013 equity funding event by the Company to raise additional needed cash.
Excluding that non-cash one-time event, you can see from our results that our underlying non-GAAP performance exceeded expectations for both sales and earnings per share. Our non-GAAP result of $0.81 per diluted share put us $0.01 per share above the high-end of our Q4 2013 guidance, while sales for the quarter came in at $136.2 million, just slightly above the high-end of our guided range of $135 million. The combination of stronger sales and better-than-anticipated manufacturing performance produced better-than-expected gross margins at 37.3%.
Higher commercial expenses, primarily related to increased year-end accruals for incentive compensation and other accruals, offset gains in manufacturing margin. However, we were still able to deliver a quarter with a non-GAAP operating profit as a percent of sales at 11.7%. That performance is 120 basis points higher than the fourth quarter of 2012, and represents the second best performance in the last eight quarters since we started our profit improvement efforts in 2012, and second only to our recent third-quarter results, which achieved 14.4% on a $7 million higher in sales, with more normalized level of commercial expenses.
We believe we are positioned well to deliver continued improvements in operating profit performance, as our sales grow based on the strength Bruce discussed in his comments. Toward that end, in comparison to last year's fourth quarter, the top-line is up $12.1 million or 9.7%. For the year, sales improved by 7.8%, with strength building from the start of the year, culminating in a second-half performance that generated 10.2% growth.
We also achieved not sustainable SG&A cost reductions in the quarter totaling approximately $2.2 million, resulting from our 2013 profit improvement efforts. Overall, we improved non-GAAP operating profit by 23%. On a comparative basis, adjusting for differences in the level of incentive compensation, operating profit achieved a 64% year-over-year gain, confirming our improvement efforts have achieved what we committed to at the start of our efforts two years ago.
Turning to slide number 8, profitability improvement, we continue to track favorably to previously committed performance improvements, with fourth-quarter non-GAAP operating profit at 11.7%, which is 600 basis points higher than our Q1 2012 starting profit level of 5.7%. The last point on the chart indicates our new Q1 2014 guidance, which at the high end of the range, will deliver operating profit at 13.7% or 410 basis point improvement over Q1 2013.
Slide number 9 -- gross margins. With the fourth-quarter 2013 at 37.3% on a non-GAAP basis, that result represents a 430 basis point improvement as compared to the 33% non-GAAP gross margin reported in the fourth quarter of 2012. Approximately 48 basis points of this improvement is a result of the $0.7 million in streamlining benefits realized this quarter as compared to last year's fourth-quarter. We also improved 150 basis points related to the addition of incremental volume at our average portfolio's 50% contribution level, and an additional 232 basis points, as we continue to absorb lower-cost incremental manufacturing capacity through our manufacturing base, and implement continuous improvements in supply chain, product quality, and procurement.
Turning to commercial expenses on slide number 10. Non-GAAP selling and administrative expenses as a percent of sales for the fourth quarter of 2013 and 2012 were 22.1% and 18.8%, respectively. The net increase was primarily related to incentive and stock compensation costs of $5.4 million, not in the 2012 comparable period. In addition, as previously described, SG&A spending was negatively impacted by $2.9 million, due to higher intangible amortizations related to Curamik purchase accounting; higher costs related to investments in key strategic areas, including IT, sales and marketing; as well as other organizational initiatives that we have said would be incurred as we earned our right to spend through profit improvement efforts. And, as I mentioned earlier, we did incur approximately $0.8 million related to year-end accrual true-ups that do not represent ongoing operating costs.
Research and development expenses were 3.5% of sales in the fourth quarter of 2013, slightly lower than the 3.8% rate experienced in the fourth quarter of 2012. In the near-term, we expect our new innovation efforts announced in 2013 to begin increasing our R&D spending rate. However, in our Q1 2014 guidance, we expect the rate to increase only marginally to 4%, moving toward the range of 4.5% to 5.0% of sales throughout 2014, as we accelerate initiatives related to the opening of the Rogers Innovation Center at Northeastern University later this quarter.
Turning to slide number 11, Rogers ended the fourth quarter with a cash and cash equivalents position of $191.9 million as compared to $158.6 million at September 30, 2013, and $114.9 million at the end of Q4 2012. As represented in the slide, we also improved our net debt metric to a positive $114.4 million, representing a $97.5 million improvement versus the fourth quarter of last year, providing added liquid reserves in support of future strategic needs. In the fourth-quarter 2013, the net increase in cash was primarily attributable to strong cash generated from operations of approximately $33.3 million.
The quarter benefited from a $16 million decrease in net working capital, primarily related to decreases in Accounts Receivable of $11.6 million, and a net increase in short-term liabilities of $3.6 million, offset by a slight increase in inventory of $1.1 million, and cash received from the exercise of stock options of $6.4 million. Those amounts were partially offset by capital expenditures of $3.3 million and long-term debt repayments totaling $3.75 million, representing a scheduled repayment against our term loan facility. We currently have $77.5 million of outstanding debt, down from $98 million at the end of 2012.
Turning to slide number 12, for the first quarter of 2014, we forecast net sales between $134 million and $138 million, and net income from continuing operations on a GAAP basis of between $0.68 a share and $0.75 a share per diluted share. At the high end of the range, this guidance represents a $12 million or 9.5% sales improvement versus Q1 2013 net sales. In operating profits, as shown in the table at the bottom of the slide, at the high end of our range, we expect to deliver $8.9 million in margin improvement, with contribution on the increased sales at 74%. That percentage is well above our normal expected average of 50%, as the benefit of $2.9 million and improved cost performance of that 0.7% related to 2013 streamlining, and $2.2 million related to improved absorption in mix, favorably impacting our gross margins, which we expect will improve to a level approaching 36.5% from last year's 33.0% in the first quarter of 2013.
That contribution is expected to be offset by the accrual of an additional $1.5 million in costs related to incentive compensation in the first quarter of 2014, as compared to the first quarter of 2013, which had a lower-than-targeted incentive compensation accrual. You will also see we are estimating $3 million in cost savings, offset by annual inflation impacts of $1.3 million, as well as strategic investments in IT and growth initiatives totaling approximately $1.9 million.
Overall, we expect that the high end of our guidance should deliver a 57% improvement in operating income compared to Q1 2013. That should achieve an operating profit of 13.7% as a percent of sales compared to the 9.6% reported in Q1 2013. Below operating income, we project approximately $0.8 million of net impact, primarily from improvements in joint venture performance. We are currently projecting a slightly favorable Q1 2014 tax rate of 28% versus the 29.2% in the first quarter of 2013, resulting in a favorable impact of taxes of approximately $0.2 million.
For those of you comparing earnings per share sequentially, the tax rate differential is much more significant, comparing a 9.3% effective rate for Q4 2013 versus the projected Q1 2014 rate of 28%. That rate differential equates to a $0.17 per share impact. Converting Q4 2013 to an apples-to-apples comparison would yield earnings per share of $0.64 per share versus our Q1 2014 guidance range of $0.68 to $0.75 per share, putting the earnings per share comparison much more in line with the expected improvement in profitability at any level of potential sales outcomes for the first quarter of 2014.
This concludes my remarks, and I will now turn the call back over to Bruce.
Bruce Hoechner - President and CEO
This concludes our prepared remarks. And we'll now open up the call for questions.
Operator
(Operator Instructions). Daniel Moore, CJS Securities.
Daniel Moore - Analyst
Thanks for taking the questions. You made significant inroads, obviously, in electric and hybrid electric vehicles in North America. Talk a little bit about the opportunity in China. How are some of the potential environmental concerns shaping the market opportunity? And maybe describe your competitive position there.
Bruce Hoechner - President and CEO
Great. Well, it's a great question. We're very pleased with, as you mentioned, the inroads we've made with North America with one of the large EV producers. And they continue to grow. But in China, as well, one of the things that we are seeing is the impact of the air pollution, and the government now setting some targets for EV HEV automobile licensing. And so, we'll be seeing that particularly in places like Beijing and Shanghai, where they're targeting somewhere around 30% of the new licenses by 2016 to be EV HEV automobiles. So where we're participating in that is with automotive manufacturers actually based in China but other locations as well, but primarily in China. And we're seeing a lot of new developments there that we're linked to.
So, that's been a very good opportunity for us. And that demand for clean energy in China is carrying on even beyond the HEV EV area, and it's going into solar. We saw quite an uptick in demand for our products going into solar energy in Q4, and we anticipate even more going forward. The Chinese government has announced another 6 gigawatt quota for solar power in the next couple of years. So, that's also good news for us.
Daniel Moore - Analyst
Great. And on the -- not the other end of the spectrum, but maybe talk a little bit about High Performance Foams, maybe a little lighter than we'd expected. Given all the cross-currents of different trends, do you expect to be able to return to positive growth in 2014 in that segment?
Bruce Hoechner - President and CEO
So, we -- over the last couple of calls, earnings calls, we've talked about the changes in the market, particularly in MID, and particularly in the tablet market. And we believe that things have settled, in a sense, as the designs have changed, and also some of the supply chain efficiencies have been starting to be built-in moving forward. But, as it relates to design changes, we are working very closely with the OEMs, introducing new products like the foam tapes, that are being now evaluated for those new designs.
So, we'll see how we move during the year, specifically around the tablets. But more -- on a more broader basis, we continue to be very energized by the growth in the impact sporting goods protection, impact apparel, industrial apparel, shoe protection, and safety shoe protection and so on. It's double-digit growth that continues for us. And we also have -- 50% of that business are industrial applications, and we continue to see strong growth there for Rogers across many different markets. So that business, we think, will certainly, during 2014, stabilize. And as we see some of these new applications coming in, we are very encouraged by that.
Daniel Moore - Analyst
Okay. And lastly, and then I'll jump back in queue. Maybe talk about the practical operational changes being made in streamlining Curamik with Power Distribution businesses. And what are some of the tangible benefits you hope to achieve?
Bruce Hoechner - President and CEO
Well, part of that streamlining is really, from a customer perspective, our ability to offer a full range of power control capabilities from the direct-bonded copper to the busbars. And so we are seeing some synergies in that, as we work together with customers on their designs. But also from a management streamlining perspective, we've organized ourselves under one global leader for that, and also, down through the organization. So, R&D manufacturing is all consolidated.
We continue to share learnings across the different parts of the Company, those two parts, the busbars and the direct-bonded copper parts. And those learnings are helping us really improve things like throughputs, reducing scrap rates, and so forth. So, that's enabled us to really help, I would say, our efficiencies, as we move forward.
Daniel Moore - Analyst
It sounds like not the larger step function improvements that we've seen, obviously, in terms of streamlining over the last 18 months.
Bruce Hoechner - President and CEO
Well, one of the big things that we did with the Curamik product line was to move final inspection to Hungary. And we continue to evaluate our opportunities there, and evaluate opportunities to really boost efficiencies in that product line.
Daniel Moore - Analyst
Great. (multiple speakers)
Dennis Loughran - VP of Finance and CFO
(multiple speakers) This is Dennis. I would comment because you -- what you inferred was the Herculean efforts over the last two years that came with the ambiguous structuring costs and severances of things, but the operations are definitely, on an ongoing basis, making tremendous strides in yield improvement, throughput efficiencies, utilization of equipment, scrap improvements that are impacting our bottom-line every day, but in that normal operational mode that doesn't require the things that we've had to do in the first two years to accelerate that growth in earnings.
Daniel Moore - Analyst
That's helpful. I'll jump back in queue. Thanks.
Bruce Hoechner - President and CEO
Thanks, Dan.
Operator
(Operator Instructions). Avinash Kant.
Avinash Kant - Analyst
So, one or two questions. The first one was that -- could you give us some color in terms of the revenue guidance that you are giving in Q1? It looks like it's up sequentially. And could you give us some color in terms of which segments are going to be seeing growth in Q1 compared to Q4 and --?
Bruce Hoechner - President and CEO
So, Avinash, first, our PCM business continues to see strength. We -- I talked a little bit earlier in the prepared remarks around the growth that we are seeing in China. But we are also seeing PCM growth in places like North America, where Verizon continues to expand their footprint, and particularly in the urban areas where there's been some bandwidth issues. So we continue to see investment there. So, quarter-over-quarter, we should see an uptick.
On the Power Electronics Solution side of the business, again, we are looking at a Q1 where we'll see some strength -- the variable speed motor drive recovery, as we see investments continuing to move forward. And then also in clean tech, clean energy on solar and even smart grids, we are seeing that growth.
Avinash Kant - Analyst
Okay. And you talked a little bit about, of course, weakness coming from the pads. Could you give us some idea what percentage of your High Performance Foams come from the tablets and everything? And then how much is coming from the cushioning applications, if you could?
Bruce Hoechner - President and CEO
So, the way we look at it -- and we categorize, I would say, the mobile Internet device as a grouping, that's about 30% or so of our revenue. So, a full 50% is coming from the industrial side of the business that we talked about, and a lesser percentage, probably around 10% or 15%, is coming from the impact apparel sporting goods and so forth. But what I will say about that segment is, that segment is growing in the range of 15% to 20% to 25%, depending on how we look at it year-on-year. So, that's -- as I look at that and I think about where Rogers is headed in the future, that area is one that's very exciting for us.
Avinash Kant - Analyst
Okay. And also, quickly on the tax rate, you said the tax rate in Q4 was 9.3%?
Dennis Loughran - VP of Finance and CFO
Correct.
Avinash Kant - Analyst
Now, Dennis, I think in the guidance, when you gave in Q3, you had talked about [15.6%]. So, what would have been the differentiating EPS at that tax rate versus 9.3%?
Dennis Loughran - VP of Finance and CFO
I've calculated the number, it's about $0.06, so we would be just above the midpoint of the range without that tax impact. But we also had impacts up in the operating statement about $3 million of extra incentives, and the year-end accrual is about $800,000, Avinash. So we're noncontinuous in nature. So when you back off the fourth quarter to a target rate of incentive of about $1.5 million a quarter, that would've more than offset the tax rate benefit, and we probably would've ended up above the high-end of the guidance range on a sort of an adjusted level commercial expense, level tax rate for the guidance basis.
Avinash Kant - Analyst
Okay, so for the next quarter, though, in the guidance, you were talking, where should we think of SG&A line? Because that seems to be the biggest variable. You give us a gross margin anyway and then you gave R&D. Where should that come out?
Dennis Loughran - VP of Finance and CFO
Yes, we're, we believe, about $26 million -- $25.5 million to $26 million a quarter is where we're at.
Avinash Kant - Analyst
Perfect. Thank you so much.
Dennis Loughran - VP of Finance and CFO
Thank you.
Bruce Hoechner - President and CEO
Thanks, Avinash.
Operator
Daniel Moore, CJS Securities.
Daniel Moore - Analyst
I'm following up on Avinash's question. Just in terms of tax rate, you're looking at a 28% tax rate for next year. I think, Dennis, you had mentioned in the last call, 25% to 28%. Is something changing materially in the business? Or are you just being a little bit conservative as we look out to 2014?
Dennis Loughran - VP of Finance and CFO
Always try to do the latter there. But 25% to 28%, there are discrete items that we can't reflect in the rate, so we tend to try toward the high-end in terms of our initial guidance for the year. And it really takes all the way to the late third-quarter/fourth-quarter to get it to a nice blended rate. The 28% is maybe a conservative look at 2014.
Daniel Moore - Analyst
Got it. So nothing different as you've reflected in the past?
Dennis Loughran - VP of Finance and CFO
With so many different jurisdictions, it's just a weighted average.
Daniel Moore - Analyst
And then one last one. Bruce, $114 million in net cash. What are we going to do with all that cash in 2014?
Bruce Hoechner - President and CEO
Well, we continue. We have a very active effort right now looking at opportunities for technology licensing, acquisitions, and so forth. And so, you know, those things come as they do. Sometimes you can't force it, but we are very, very active right now.
Daniel Moore - Analyst
Did you characterize it as more active and optimistic than this time last year? Or relatively the same?
Bruce Hoechner - President and CEO
No, no. I would say we're more active and more optimistic.
Daniel Moore - Analyst
Okay. Thank you very much.
Operator
John Reilly, ACK Asset.
John Reilly - Analyst
I was -- Dan beat me to the punch. The balance sheet, obviously, has gotten tremendously strong since you've come here, Bruce. When would you think about multiple approaches in return to shareholders, in addition to M&A, obviously, being number one, and if you can get high returns with that. Have you thought about -- is the Board thinking about other returns to shareholders?
Bruce Hoechner - President and CEO
This conversation is an ongoing one with the Board, looking at what options there are in terms of stock buyback in terms of dividends. We, right now, are believing that our best option is investing in the Company itself and looking at investments in acquisitions as well. But, again, we're in the midst of those conversations with the Board.
John Reilly - Analyst
That's great. High-class problems to have. And then just a follow-up. Obviously, the incrementals being so high, and you're guiding for the incrementals to be in excess of 70% again for Q1. How much of that is mix? And how much of that is really structural? I know you're not changing your long-term of thinking about it in the 50% range, but how much of it is product mix? How much of it is structural? And can we think about higher incrementals going forward?
Dennis Loughran - VP of Finance and CFO
I'll tell you, I don't know if you could look for too much higher incremental profitability than 74%. (laughter) (multiple speakers)
John Reilly - Analyst
No, I mean, I'll take that; ongoing is what I meant.
Dennis Loughran - VP of Finance and CFO
So I think part of it is structurally -- we've told folks at the beginning of last year, that we had an 18 to 24 month runway of filling up capacity. So that I believe, over the next year or so, you'll see nice above-50% contributions on bringing volume into our facilities. We start adding capacity in 2015. So, next year, I wouldn't expect higher year-over-year contributions like that, because it will be some negative but it will still be nice. But this is a robust year for contribution level of bringing volume into the system.
John Reilly - Analyst
Got it. And then just also focusing on the incentive comp as we go forward. Is that a normalized -- and now are we looking at a more normalized rate based upon your guidance for Q1? Are you accruing at a normal rate going forward (multiple speakers) --? Okay.
Dennis Loughran - VP of Finance and CFO
(multiple speakers) We had a situation in 2013 of much heavier toward year-end, because profitability improved throughout the year. And we're looking at basically normalized average quarterly rate, I think, in the $1.7 million range on an average basis per quarter.
John Reilly - Analyst
That's great. That's great. Congratulations on the good numbers. Thanks, guys.
Bruce Hoechner - President and CEO
Thanks a lot, John.
Operator
There are no further questions in queue at this time. I'll turn the call back over to Mr. Hoechner.
Bruce Hoechner - President and CEO
Great. Thank you, Charlene. Well, in closing, let me summarize a few highlights of our call. First, we delivered strong revenue growth for the quarter and for 2013 overall. We finished the year with record results for Printed Circuit Materials and robust growth in Power Electronic Solutions. The recovery in clean energy and global demand for Internet connectivity drove much of that growth, and market indications going forward are positive.
Secondly, we continue to improve our margins, as we reap the benefits of operational excellence and organizational improvements that began in 2012. Lastly, we are investing in our capabilities to continue to increase our value to shareholders. Utilizing an outside-in approach to gain greater knowledge about our customers, markets, and technology, is helping us identify new opportunities. This approach extends to many other areas of the Company as well, where we are using external benchmarks to evaluate and improve our performance. These efforts are paying off for our shareholders, as we have delivered double-digit earnings growth over the past three quarters. The positive indicators from our key markets lead us to expect healthy demand for our products in the years ahead, and we believe we are well-positioned for future success.
Thanks a lot for joining us on the call today. Have a great day.
Operator
This concludes today's conference call. You may now disconnect.