Patent ID: 7235446

Claim:
A method of forming a memory device, comprising: forming a first insulating layer over a substrate; forming a floating gate over the first insulating layer, the floating gate comprising a metal; forming a second insulating layer over the floating gate, the second insulating layer comprising a material that differs from the first insulating layer; forming a control gate over the second insulating layer; and the second insulating layer comprising Al 2 O 3 doped with silicon atoms, and being formed by: evaporating aluminum oxide from a single crystal sapphire; evaporating silicon monoxide from a source of silicon monoxide; forming a vapor mixture comprising the evaporated aluminum oxide and evaporated silicon monoxide in a reaction chamber; and depositing at least some of the evaporated aluminum oxide and silicon from the silicon monoxide to form the Al 2 O 3 doped with silicon atoms.