Patent ID: 6404038
Filing Date: 2002-06-11
Classification: H01L

Abstract:
A complementary vertical bipolar junction transistor apparatus comprising:a sapphire substrate; a PNP transistor including: a P+ region formed of an island of recrystalized silicon disposed on said sapphire substrate, and P+ region being a collector region; an N intrinsic base silicon region disposed on said P+ region; a P+ emitter region disposed within said N base region; N+ extrinsic base regions disposed within said N base region; individual conducting metal contacts operably coupled to said emitter, said extrinsic base regions and disposed on sidewalls of said collector region; and an oxide disposed between said conducting metal contacts, a NPN transistor including: an N+ region formed of an island of recrystalized silicon disposed on said sapphire substrate and separated from said PNP transistor, said N+ region being a subcollector region; an N collector silicon region disposed on said N+ region; a P intrinsic base region disposed within said N collector silicon region; an N+ emitter region disposed within said P base region; P+ extrinsic base regions in said P intrinsic base region; individual conducting metal contacts operably coupled to said emitter, said extrinsic base regions and disposed on sidewalls of said collector region; and an oxide region disposed between said conducting metal contacts; and an oxide region disposed on said sapphire substrate between said PNP and NPN transistors.