Okhonin, previously chief scientific officer at Innovative Silicon, is the founder of a startup called ActLight Inc.
The Z-RAM technology was originally based on the use of silicon-on-insulator wafers, which are more expensive than bulk CMOS wafers and have yet to become mainstream within the industry.
The company subsequently developed a low-voltage floating-body DRAM memory cell suitable for bulk silicon stand-alone memory application. Indeed, Van Buskirk credits himself with having determined that the original Z-RAM technology was "neither scalable nor reliable" and having co-invented the alternative bulk silicon technology.
A joint paper between Innovative Silicon and Hynix Semiconductor Inc. on a bulk form of Z-RAM was presented at the VLSI Technology Symposium in 2009 and another paper on the vertical double-gate floating body Z-RAM memory cell was presented at the same conference in 2010.
It is not known whether either Micron or Hynix is continuing to work on the vertical, double-gate floating body Z-RAM technology.
Innovative Silicon raised $47 million in three rounds of venture funding from firms including: Auriga Partners, Index Ventures, Highland Capital Partners, Austin Ventures and Wellington Partners. It would seem likely that Micron has picked up Innovative Silicon's patent portfolio.
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.