Semiconductor device manufacturing: process – Packaging or treatment of packaged semiconductor – Metallic housing or support
Patent
1998-01-08
1999-10-19
Picardat, Kevin M.
Semiconductor device manufacturing: process
Packaging or treatment of packaged semiconductor
Metallic housing or support
438106, 438121, 438123, H01L 2144, H01L 2148, H01L 2150
Patent
active
059703229
ABSTRACT:
An ultrahigh-frequency electronic component has an ultrahigh-frequency chip encased in a molded-resin package. The ultrahigh-frequency electronic component includes a first sealing layer encasing the ultrahigh-frequency chip therein and a second sealing layer encasing the first sealing layer therein. The first sealing layer contains a number of voids or minute air bubbles therein which are effective in reducing the permittivity of the first sealing layer. A method of manufacturing the ultrahigh-frequency electronic component is also disclosed.
REFERENCES:
patent: 4890155 (1989-12-01), Miyagawa et al.
patent: 4894704 (1990-01-01), Endo
patent: 5304512 (1994-04-01), Arai et al.
Hirokawa Tomoaki
Ichikawa Seiji
Kimura Tomoaki
Kubota Tsutomu
Murata Satoshi
Collins D. M.
NEC Corporation
Picardat Kevin M.
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