An interesting look at silicon-on-sapphire - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: Not HP Calculators (/forum-7.html) +--- Forum: Not quite HP Calculators - but related (/forum-8.html) +--- Thread: An interesting look at silicon-on-sapphire (/thread-21026.html)

An interesting look at silicon-on-sapphire - dm319 - 12-22-2023 11:08 AM I've been following Ken Shirriff's blog since I first read his article on reverse engineering the adder in a 6088 chip. His most recent article looks at a silicon-on-sapphire chip, taking microscopic images of it to see how some of it functions. The chip isn't for a calculator (though I imagine it would be fascinating to see how the BCD processor was implemented), but thought it might be interesting: https://www.righto.com/2023/12/HP-silicon-on-sapphire-phi-chip.html