Inventor
KUMAZAWA TETSUO
JP19 patents
⚠️ This page may combine multiple inventors who share the name “KUMAZAWA TETSUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
17 patentsUS5608265AMar 4, 1997
Encapsulated semiconductor device package having holes for electrically conductive material
HITACHI LTD567 citations99
US5569960AOct 29, 1996
Electronic component, electronic component assembly and electronic component unit
HITACHI LTD105 citations98
US5195155AMar 16, 1993
Optical coupling apparatus and manufacturing method of the same, and lens holder
HITACHI LTD107 citations94
US6130112AOct 10, 2000
Semiconductor device
HITACHI LTD20 citations93
US6049128AApr 11, 2000
Semiconductor device
HITACHI LTD21 citations93
US6566150B2May 20, 2003
Semiconductor device and manufacturing method thereof including a probe test step and a burn-in test step
HITACHI LTD15 citations92
US6455335B1Sep 24, 2002
Semiconductor device and manufacturing method thereof including a probe test step and a burn-in test step
HITACHI LTD17 citations92
US5637914AJun 10, 1997
Lead frame and semiconductor device encapsulated by resin
HITACHI LTD24 citations92
US4880290ANov 14, 1989
Opto-electronic device and method for producing the device
HITACHI LTD40 citations92
US4528223AJul 9, 1985
Composite fibrous product
HITACHI LTD49 citations92
US5046798ASep 10, 1991
Semiconductor light emitting device and apparatus using the same
HITACHI LTD33 citations91
US6197603B1Mar 6, 2001
Semiconductor device and manufacturing method thereof including a probe test step and a burn-in test step
HITACHI LTD12 citations82
US5837567ANov 17, 1998
Lead frame and semiconductor device
HITACHI LTD8 citations73
US4251746AFeb 17, 1981
Direct-heated cathode structure
HITACHI LTD11 citations70
US6297073B1Oct 2, 2001
Semiconductor device
HITACHI LTD1 citations63
US7198962B2Apr 3, 2007
Semiconductor device and manufacturing method thereof including a probe test step and a burn-in test step
HITACHI LTD3 citations62
US4335329AJun 15, 1982
Mask support for shadow mask assembly
HITACHI LTD6 citations60