Inventor
KATAYAMA YOSHIFUMI
JP17 patents
⚠️ This page may combine multiple inventors who share the name “KATAYAMA YOSHIFUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
14 patentsUS4337443AJun 29, 1982
Semiconductor laser device with facet passivation film
HITACHI LTD53 citations96
US4613382ASep 23, 1986
Method of forming passivated polycrystalline semiconductors
HITACHI LTD43 citations92
US4433202AFeb 21, 1984
Thin film solar cell
HITACHI LTD46 citations92
US4289822ASep 15, 1981
Light-sensitive film
HITACHI LTD68 citations92
US6279226B1Aug 28, 2001
Lead bonding machine for bonding leads of a chip disposed over a carrier tape to an electrode pad formed on the chip
HITACHI LTD32 citations89
US4673959AJun 16, 1987
Heterojunction FET with doubly-doped channel
HITACHI LTD20 citations82
US4351856ASep 28, 1982
Semiconductor device and method of manufacturing the same
HITACHI LTD27 citations82
US4835583AMay 30, 1989
Semiconductor device having strained superlattice buffer layers with In-doped GaAs substrate
HITACHI LTD8 citations73
US4796068AJan 3, 1989
Semiconductor device having ultrahigh-mobility
HITACHI LTD14 citations73
US4605945AAug 12, 1986
Semiconductor device
HITACHI LTD15 citations73
US4559547ADec 17, 1985
Semiconductor device
HITACHI LTD10 citations73
US4672406AJun 9, 1987
Semiconductor member and semiconductor device employing the same
HITACHI LTD3 citations63
US4759030AJul 19, 1988
Semiconductor laser
HITACHI LTD6 citations62
US6516515B2Feb 11, 2003
Semiconductor integrated circuit
HITACHI LTD2 citations60