Active solid-state devices (e.g. – transistors – solid-state diode – Heterojunction device – Field effect transistor
Patent
1993-06-02
1994-08-23
Hille, Rolf
Active solid-state devices (e.g., transistors, solid-state diode
Heterojunction device
Field effect transistor
257255, 257392, 257401, 257627, H01L 27088, H01L 2904
Patent
active
053410076
ABSTRACT:
A semiconductor device comprising a plurality of elemental active devices being operable with different threshold voltages is disclosed. Each of the elemental active devices, e.g. D-mode and E-mode HEMT, is formed of each of different active layers epitaxially grown on each of different regions of a semiconductor substrate. Since the different regions have different surface orientations or surface areas, each of the different active layers have different carrier densities corresponding to the surface orientation or the surface areas.
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Brown Peter Toby
Hille Rolf
Sumitomo Electric Industries Ltd.
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