Toshikatsu Shirasawa

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Hitachi, JP

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Patents Grantslast 30 patents

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Semiconductor device
- Patent number 4,949,137
- Issue date Aug 14, 1990
- Hitachi, Ltd.
- Hitoshi Matsuzaki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor device with field plate
- Patent number 4,654,691
- Issue date Mar 31, 1987
- Hitachi, Ltd.
- Toshikatsu Shirasawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of simultaneously controlling the lifetimes and leakage curr...
- Patent number 4,210,464
- Issue date Jul 1, 1980
- Hitachi, Ltd.
- Tomoyuki Tanaka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Electron irradiation process of glass passivated semiconductor devi...
- Patent number 4,201,598
- Issue date May 6, 1980
- Hitachi, Ltd.
- Tomoyuki Tanaka
- H01 - BASIC ELECTRIC ELEMENTS