What was the revenue for the fourth quarter of 2019 for the specialty devices and advanced packaging segment of the merged company ONTO
nts. And as we manage through this situation and assess timing, our first priority will be to the safety and well-being of our staff and their families.
Looking more broadly at 2020, we see demand for 5G-enabled devices and high-performance computing sparking a broader recovery in the market. Gartner forecasts that worldwide, mobile phones will see a modest increase this year versus a decline in 2019. Driving the majority of that increase are the 5G-enabled handsets, which Gartner predicts will account for 12% of all mobile phone shipments in 2020, increasing to 43% of all mobile phones in 2022. As a result, we expect to see a number of Onto Innovation markets expand in 2020.
The most obvious impact of this growth is in our specialty devices and advanced packaging segment. Underscoring this opportunity is our release from earlier in this -- in the month announcing the receipt of orders for 15 inspection systems from two customers rapidly expanding advanced packaging capacity to support wafer-level packaging of 5G devices. We see continued growth in these markets in 2020, driven by volume increases as well as additional devices migrating to advanced packaging. We also see 5G and high-performance computing, benefiting our advanced node segments in which leaders, such as SK Hynix, recently forecast 5G smartphones will drive a 25% increase in DRAM content per phone, while NAND will benefit from 20% increase per phone.
And TSMC recently cited growing demand for their 5 nanometer process from 5G processors, RF front-end modules and advanced computing. We expect our advanced semiconductor nodes segment to grow modestly with sustained levels of logic foundry spending and a pickup in memory spending starting with DRAM. In conclusion, semiconductor markets are becoming more diverse every year. We see chip innovations and cameras, sensing and communications, enabling new customer products such as smart home, smart grids and wearable health monitors.
We see innovations in the advanced nodes for both memory and logic, enabling data centers and AI engines to open up entirely new markets such as medicine, autonomous driving and energy. We see a growing number of customers increasing their focus on advanced packaging technology to unlock the full potential of new chip designs and more tightly integrated and high-performing form factors. Across the spectrum, Onto Innovation is an important partner to our customers. Our merger strengthens our ability to provide value-enhancing services to our customers, increase our pace of product innovation and deliver more comprehensive, integrated solutions to challenges further down our customers road map.
We are only at the very start of this journey but we are committed to maximizing our potential to the benefit of all of our stakeholders, customers, shareholders and our team. With that, I'll turn the call over to Steve Roth to review the financial highlights.
Steven Roth -- Chief Financial Officer
Thanks Mike. Before I begin my financial remarks today, I want to remind you as usual the financial results discussed here will be provided on a non-GAAP basis. And that our non-GAAP presentation for the new merged company no longer excludes stock-based compensation as the former Rudolph financials did. In addition, as detailed in our last conference call, Rudolph was deemed the financial acquirer in the merger.
And therefore, the combined financial results presented today represent the results of Rudolph for the full fourth quarter but only the results of former Nanometrics since the closing of the merger on October 25. I recognize that this partial quarter makes comparability of prior period somewhat difficult and I'll try to bridge those differences for comparative purposes to the prior periods. As Mike mentioned, our reported fourth-quarter revenue was $120.6 million, above the midpoint of our guidance. That revenue excludes both $10 million of Nanometrics October shipments and $1.7 million of deferred revenue that would have rolled into the quarter but was eliminated in the merger accounting.
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nts. And as we manage through this situation and assess timing, our first priority will be to the safety and well-being of our staff and their families.
Looking more broadly at 2020, we see demand for 5G-enabled devices and high-performance computing sparking a broader recovery in the market. Gartner forecasts that worldwide, mobile phones will see a modest increase this year versus a decline in 2019. Driving the majority of that increase are the 5G-enabled handsets, which Gartner predicts will account for 12% of all mobile phone shipments in 2020, increasing to 43% of all mobile phones in 2022. As a result, we expect to see a number of Onto Innovation markets expand in 2020.
The most obvious impact of this growth is in our specialty devices and advanced packaging segment. Underscoring this opportunity is our release from earlier in this -- in the month announcing the receipt of orders for 15 inspection systems from two customers rapidly expanding advanced packaging capacity to support wafer-level packaging of 5G devices. We see continued growth in these markets in 2020, driven by volume increases as well as additional devices migrating to advanced packaging. We also see 5G and high-performance computing, benefiting our advanced node segments in which leaders, such as SK Hynix, recently forecast 5G smartphones will drive a 25% increase in DRAM content per phone, while NAND will benefit from 20% increase per phone.
And TSMC recently cited growing demand for their 5 nanometer process from 5G processors, RF front-end modules and advanced computing. We expect our advanced semiconductor nodes segment to grow modestly with sustained levels of logic foundry spending and a pickup in memory spending starting with DRAM. In conclusion, semiconductor markets are becoming more diverse every year. We see chip innovations and cameras, sensing and communications, enabling new customer products such as smart home, smart grids and wearable health monitors.
 We see innovations in the advanced nodes for both memory and logic, enabling data centers and AI engines to open up entirely new markets such as medicine, autonomous driving and energy. We see a growing number of customers increasing their focus on advanced packaging technology to unlock the full potential of new chip designs and more tightly integrated and high-performing form factors. Across the spectrum, Onto Innovation is an important partner to our customers. Our merger strengthens our ability to provide value-enhancing services to our customers, increase our pace of product innovation and deliver more comprehensive, integrated solutions to challenges further down our customers road map.
We are only at the very start of this journey but we are committed to maximizing our potential to the benefit of all of our stakeholders, customers, shareholders and our team. With that, I'll turn the call over to Steve Roth to review the financial highlights.
Steven Roth -- Chief Financial Officer
Thanks Mike. Before I begin my financial remarks today, I want to remind you as usual the financial results discussed here will be provided on a non-GAAP basis. And that our non-GAAP presentation for the new merged company no longer excludes stock-based compensation as the former Rudolph financials did. In addition, as detailed in our last conference call, Rudolph was deemed the financial acquirer in the merger.
And therefore, the combined financial results presented today represent the results of Rudolph for the full fourth quarter but only the results of former Nanometrics since the closing of the merger on October 25. I recognize that this partial quarter makes comparability of prior period somewhat difficult and I'll try to bridge those differences for comparative purposes to the prior periods. As Mike mentioned, our reported fourth-quarter revenue was $120.6 million, above the midpoint of our guidance. That revenue excludes both $10 million of Nanometrics October shipments and $1.7 million of deferred revenue that would have rolled into the quarter but was eliminated in the merger accounting.
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