What is the expected revenue for AXT in Q1 of 2021 from indium phosphide
ates for us, too. We hope to file the application with the China Securities Regulatory Commission by the end of June.
There's a lot to accomplish to achieve that goal, and it will be a busy four months for us. OK. This concludes the financial review. I'll now turn the call over to Dr.
Morris Young for a review of our business. Morris?
Morris Young -- Founder and Chief Executive Office
Thank you, Gary, and good afternoon, everybody. 2020 was a year of solid achievement for AXT, capped off by the growth in Q4, which is typically a seasonally down quarter. We completed the relocation of our gallium arsenide manufacturing, elevated our business and manufacturing processes to meet tier one standards, and expanded capacity in response to increasing demand. Now, with the gathering momentum of 5G and its related technologies, new applications emerging in healthcare and consumer devices, and the technology progression and data center connectivity, we believe AXT is in a strong, competitive position to lead our industry and enable many of the defining trends of the coming decades.
And we are ready. In fact, we don't often make fiscal-year projections, but I will give you a few today. First, in 2021, we expect to bring eight-inch gallium arsenide and six-inch indium phosphide to market. We expect to exceed that elusive $30 million revenue quarter-per-quarter mark.
We expect to ramp up production with multiple tier one companies. And finally, we're excited to successfully move AXT toward a 2022 listing on the STAR Market in China. We believe this year will be transformative for AXT, and in turn, for our employees, our customers, and our shareholders. While we said it before, I am truly excited to report to you on our progress.
So let's now get started with indium phosphide. Q4 of 2020 was a strong -- second strongest revenue quarter for our indium phosphide portfolio in the history of AXT. Our results were exceeded only by Q2 2019 when we received a very large order from a single customer, who we believe is building an inventory for expected future demand. In Q4 of 2020, however, our revenue achievement was spread across many customers and money applications.
We believe the current revenue diversity demonstrates the broad and sustainable nature of our growth opportunities in indium phosphide. It was in April of 2019 that we first mentioned 5G revenue on our earnings report. Let's say, a year later, 5G and its closely related power applications are driving significant growth in our indium phosphide revenue. Demand had been particularly strong in China and Taiwan, and we don't see any slowing in 2021, as 5G continues to roll out worldwide.
We believe capacity in our industry remains very tight. We have and will continue to run capacity at our Beijing facility to keep pace with customer demand. Scaling quickly and cost it effectively is something AXT is uniquely able to do, and we expect to gain market share because we have the shortest lead time among our primary competitors. In data center connectivity, the ever-expanding number of users, devices, and applications is driving the transition to technology that transports faster, more scalable infrastructures.
High-capacity connectivity will continue to be essential. In fact, many believe that the evolution from 100G to 400G will happen faster than the move to 100G. We are seeing this growth in silicon photonics reflected in our steady, strong demand in data center-related revenue. Moreover, we are pleased with the highly productive customer relationships we are developing in this area of our business, and we are applying the tier one processes we have developed to benefit customer experiences across our portfolio.
In 2021, we expect to see the meaningful emergence of additional new applications for indium phosphide in such areas as healthcare monitoring and consumer devices. Money are being innovatively driven by tier one players and showcase the unique properties of indium phosphide. These applications have the potential to represent an entirely new growth area, for which we are well-
ates for us, too. We hope to file the application with the China Securities Regulatory Commission by the end of June.
There's a lot to accomplish to achieve that goal, and it will be a busy four months for us. OK. This concludes the financial review. I'll now turn the call over to Dr.
Morris Young for a review of our business. Morris?
Morris Young -- Founder and Chief Executive Office
Thank you, Gary, and good afternoon, everybody. 2020 was a year of solid achievement for AXT, capped off by the growth in Q4, which is typically a seasonally down quarter. We completed the relocation of our gallium arsenide manufacturing, elevated our business and manufacturing processes to meet tier one standards, and expanded capacity in response to increasing demand. Now, with the gathering momentum of 5G and its related technologies, new applications emerging in healthcare and consumer devices, and the technology progression and data center connectivity, we believe AXT is in a strong, competitive position to lead our industry and enable many of the defining trends of the coming decades.
And we are ready. In fact, we don't often make fiscal-year projections, but I will give you a few today. First, in 2021, we expect to bring eight-inch gallium arsenide and six-inch indium phosphide to market. We expect to exceed that elusive $30 million revenue quarter-per-quarter mark.
We expect to ramp up production with multiple tier one companies. And finally, we're excited to successfully move AXT toward a 2022 listing on the STAR Market in China. We believe this year will be transformative for AXT, and in turn, for our employees, our customers, and our shareholders. While we said it before, I am truly excited to report to you on our progress.
So let's now get started with indium phosphide. Q4 of 2020 was a strong -- second strongest revenue quarter for our indium phosphide portfolio in the history of AXT. Our results were exceeded only by Q2 2019 when we received a very large order from a single customer, who we believe is building an inventory for expected future demand. In Q4 of 2020, however, our revenue achievement was spread across many customers and money applications.
 We believe the current revenue diversity demonstrates the broad and sustainable nature of our growth opportunities in indium phosphide. It was in April of 2019 that we first mentioned 5G revenue on our earnings report. Let's say, a year later, 5G and its closely related power applications are driving significant growth in our indium phosphide revenue. Demand had been particularly strong in China and Taiwan, and we don't see any slowing in 2021, as 5G continues to roll out worldwide.
We believe capacity in our industry remains very tight. We have and will continue to run capacity at our Beijing facility to keep pace with customer demand. Scaling quickly and cost it effectively is something AXT is uniquely able to do, and we expect to gain market share because we have the shortest lead time among our primary competitors. In data center connectivity, the ever-expanding number of users, devices, and applications is driving the transition to technology that transports faster, more scalable infrastructures.
High-capacity connectivity will continue to be essential. In fact, many believe that the evolution from 100G to 400G will happen faster than the move to 100G. We are seeing this growth in silicon photonics reflected in our steady, strong demand in data center-related revenue. Moreover, we are pleased with the highly productive customer relationships we are developing in this area of our business, and we are applying the tier one processes we have developed to benefit customer experiences across our portfolio.
In 2021, we expect to see the meaningful emergence of additional new applications for indium phosphide in such areas as healthcare monitoring and consumer devices. Money are being innovatively driven by tier one players and showcase the unique properties of indium phosphide. These applications have the potential to represent an entirely new growth area, for which we are well-