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.
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