Inventor
KAWATA MASAHIKO
JP8 patents
Patents
8 patentsUS4212021AJul 8, 1980
Light emitting devices
HITACHI LTD30 citations92
US5668402ASep 16, 1997
Semiconductor device
HITACHI LTD15 citations73
US5381027AJan 10, 1995
Semiconductor device having a heterojunction and a two dimensional gas as an active layer
HITACHI LTD18 citations73
US5258631ANov 2, 1993
Semiconductor device having a two-dimensional electron gas as an active layer
HITACHI LTD13 citations73
US5025751AJun 25, 1991
Solid film growth apparatus
HITACHI LTD16 citations73
US4122486AOct 24, 1978
Semiconductor light-emitting element
HITACHI LTD12 citations73
US5296733AMar 22, 1994
Hetero junction bipolar transistor with improved electrode wiring contact region
HITACHI LTD14 citations71
US4740819AApr 26, 1988
Photo semiconductor device
HITACHI LTD17 citations71