Globalfoundries at work on next-gen FDSOI process

May 25, 2016 // By Peter Clarke
Globalfoundries Malta
The 22FDX fully-depleted silicon-on-insulator (FDSOI) process developed by Globalfoundries Inc. (Santa Clara, Calif.) is on track to debut later this year and the company is working on the follow-on process, according to chief technology officer Gary Patton.

Globalfoundries claims its 22FDX platform, four processes with different optimizations, can deliver FinFET performance and energy efficiency at a cost comparable with planar 28nm CMOS. The ability to perform back-biasing provides the opportunity to dynamically change the operation of transistors from performance to minimal leakage.

 

However, FinFET production remains the mainstream option for leading edge ICs that is best supported by foundries, including Globalfoundries, and by IP developers. In addition Samsung's foundry is also offering a 28nm FDSOI process.

Patton, previously a career-long IBM researcher, was brought in to Globalfoundries when the foundry acquired IBM's semiconductor operations (see IBM-GlobalFoundries Deal Finalized ).


Gary Patton, CTO Globalfoundries.

"We looked at both FinFET and FDSOI is perfectly suited for the mobile space," Patton told EE Times Europe on the sidelines of the IMEC Technology Forum held in Brussels this week. "The work started in Malta (New York) and has transferred to Dresden. The yields are ahead of schedule and the focus is on getting design IP built up."

Globalfoundries is working with a company called Invecas Inc. to develop foundation IP for its 14nm FinFET and 22nm FDSOI manufacturing processes. The schedule for 22FDX has Globalfoundries starting risk production for customers late in 2016 with volume manufacturing arriving in 2017.

Patton made the point that FinFET processes with their high drive current capability are well suited to driving signal lines across large chips and where sustained performance is required. However, for smaller chips and chips where power consumption is key then FDSOI is a better option. Patton also makes the point that FinFETs have a quantized drive regime where a developer must choose between 1, 2 or more fins, which is not suited to analog or RF signal.

But although Globalfoundries has been extolling the virtues of 22FDX for analog and the RF in the Internet of Things (IoT) Patton makes the point that the process also addresses digital requirements. "There's