Slide 63 of 64
I want to thank this audience for permitting me to present at this meeting. Although I have spoken primarily about SiGe HBT technology, there are some interesting plays for GHz CPU design using SiGe HEMTs. But these devices are not currently in production and our group's previous experiences with unusual FET's suggested that wiring consumes a lot of their hidden virtues. JJs seem faster but they will demand cryo operation at 4K. It will be interesting to follow Dr. Likarev's research in this area. However JJs are not essential for PetaOPS operation. SiGe HBTs appear to afford less risk.