Active solid-state devices (e.g. – transistors – solid-state diode – Heterojunction device – Field effect transistor
Reexamination Certificate
2005-02-08
2005-02-08
Blum, David S. (Department: 2813)
Active solid-state devices (e.g., transistors, solid-state diode
Heterojunction device
Field effect transistor
Reexamination Certificate
active
06853016
ABSTRACT:
To provide a semiconductor device which makes it possible to avoid deterioration in the step coverage property at a gate electrode provided on an operating region and decrease a leakage current between the operating region and the gate electrode. The semiconductor device arranged as a HEMT is made to include an operating region composed of multilayer films, such as a channel layer, an electron supplying layer and other semiconductor layer, and having an island structure independently mesa-isolated from one another. The semiconductor device also includes a gate electrode and an impurity diffusion layer provided on the surface of the operating region, the impurity diffusion layer being doped with an impurity having a conductivity type inverse to the impurity doped into the electron supplying layer.
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Blum David S.
Kananen Ronald P.
Rader & Fishman & Grauer, PLLC
Sony Corporation
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