A Canadian company, Chipworks sides with Sony and Toshiba in the o­ngoing battle as to whether or not the PSX uses a 130nm process or a 90nm process, as Sony claims.

"'Chipworks obtained a sample of the Sony PSX chip and had started to take it apart based o­n the reports that it was a 90 nm part, but we have come to somewhat different conclusions than those reported last week.' stated Chipworks senior technology analyst Dick James. 'For o­ne thing, we found transistors with a physical gate length of 45 – 50 nm, which immediately led us to believe that we did have a 90 nm part.'"

And more information:

Chipworks News Article:
http://www.chipworks.com/news/11SonyPSX.htm

Semiconductor's "What constitutes 90nm?":
http://www.semiconductor.com/resources/newsletters/82_eegs90nm.asp