Inventor
KAWAI HIROJI
JP38 patents
⚠️ This page may combine multiple inventors who share the name “KAWAI HIROJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
31 patentsUS6501154B2Dec 31, 2002
Semiconductor substrate made of a nitride III-V compound semiconductor having a wurtzite-structured crystal structure
SONY CORP79 citations98
US6121636ASep 19, 2000
Semiconductor light emitting device
SONY CORP110 citations98
US6064082AMay 16, 2000
Heterojunction field effect transistor
SONY CORP333 citations98
US5929467AJul 27, 1999
Field effect transistor with nitride compound
SONY CORP270 citations98
US6140169AOct 31, 2000
Method for manufacturing field effect transistor
SONY CORP99 citations97
US6468902B2Oct 22, 2002
Semiconductor device and its manufacturing method
SONY CORP49 citations96
US6281032B1Aug 28, 2001
Manufacturing method for nitride III-V compound semiconductor device using bonding
SONY CORP61 citations96
US6239033B1May 29, 2001
Manufacturing method of semiconductor device
SONY CORP73 citations96
US5863811AJan 26, 1999
Method for growing single crystal III-V compound semiconductor layers on non single crystal III-V Compound semiconductor buffer layers
SONY CORP66 citations95
US6426264B1Jul 30, 2002
Method of manufacturing a semiconductor laminated substrate, semiconductor crystal substrate and semiconductor device
SONY CORP19 citations92
US6235617B1May 22, 2001
Semiconductor device and its manufacturing method
SONY CORP28 citations92
US6111273AAug 29, 2000
Semiconductor device and its manufacturing method
SONY CORP24 citations92
US6107162AAug 22, 2000
Method for manufacture of cleaved light emitting semiconductor device
SONY CORP40 citations92
US6043140AMar 28, 2000
Method for growing a nitride compound semiconductor
SONY CORP29 citations92
US5981980ANov 9, 1999
Semiconductor laminating structure
SONY CORP67 citations92
US5821568AOct 13, 1998
Cleaved semiconductor device with {11-20} plane
SONY CORP36 citations92
US5753966AMay 19, 1998
Semiconductor device with cleaved surface
SONY CORP34 citations92
US5200021AApr 6, 1993
Method and apparatus for vapor deposition
SONY CORP22 citations87
US4751195AJun 14, 1988
Method of manufacturing a heterojunction bipolar transistor
SONY CORP22 citations82
USRE38613EOct 5, 2004
Method for growing a nitride compound semiconductor
SONY CORP10 citations74
US6750481B2Jun 15, 2004
Semiconductor laminated substrate, semiconductor crystal substrate and semiconductor device and method of manufacturing the same
SONY CORP11 citations74
US6413312B1Jul 2, 2002
Method for growing a nitride compound semiconductor
SONY CORP10 citations74
US5140399AAug 18, 1992
Heterojunction bipolar transistor and the manufacturing method thereof
SONY CORP8 citations74
US4916499AApr 10, 1990
Junction field effect transistor with vertical gate region
SONY CORP12 citations74
US6362016B1Mar 26, 2002
Semiconductor light emitting device
SONY CORP5 citations73
US6081001AJun 27, 2000
Nitride semiconductor light emitting device
SONY CORP12 citations73
US4903104AFeb 20, 1990
Heterojunctional collector-top type bi-polar transistor
SONY CORP14 citations73
US4016052AApr 5, 1977
Electrodeposition process
SONY CORP14 citations73
US6903392B2Jun 7, 2005
Semiconductor device and its manufacturing method
SONY CORP1 citations63
US5124771AJun 23, 1992
Semiconductor device
SONY CORP6 citations62
US4252669AFeb 24, 1981
Luminescent material and method of making the same
SONY CORP3 citations60
POWDEC KK
4 patentsUS9991335B2Jun 5, 2018
Semiconductor device having a polarization super junction field effect transistor, electric equipment, bidirectional field effect transistor, and mounted structure body having the same
POWDEC KK5 citations67
US12520534B2Jan 6, 2026
Normally-off mode polarization super junction GaN-based field effect transistor and electrical equipment
POWDEC KK0 citations51
US12446250B2Oct 14, 2025
Normally-off mode polarization super junction GaN-based field effect transistor and electrical equipment
POWDEC KK0 citations51
US10014399B1Jul 3, 2018
Hetero-junction bipolar transistor and electric device
POWDEC KK1 citations51