Patent ID: 7119365

Claim:
A semiconductor device comprising an insulating substrate comprising high-strain-point glass; a first layer comprising SiO 2 provided on the insulating substrate; at least a single crystal Si thin film provided on only a partial area of the first layer comprising SiO 2 , the single crystal Si thin film being of a size not larger than wafer size used in LSI manufacture; a polycrystalline Si thin film provided on the first layer comprising SiO 2 , but in an area different from an area where the single crystal Si thin film is provided on the first layer comprising SiO 2 , and wherein the single crystal Si thin film and the polycrystalline Si thin film are at least partially provided at different elevations in the semiconductor device; and wherein the single crystal Si thin film and the polycrystalline Si thin film are each semiconductor layers as active layers of respective transistors in the semiconductor device.