Unusual silicon-on-sapphire chip unearthed in ancient HP floppy disk drive [TechSpot]

The old floppy drive had a broken interface chip, Shirriff explained on his blog. He decided to decap it and took photos. The chip has an unusual substrate, consisting of a sapphire base with silicon elements and metal wiring on top. The “silicon-on-sapphire” chip is partly transparent, Shirriff notes, and…Read Entire Article