Maleimide resin composition and resin encapsulated semiconductor device manufactured using the composition

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United States of America Patent

PATENT NO 5272377
SERIAL NO

07785812

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Abstract

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The device characteristics is in containing a maleimide resin with a content of 0.2 weight percent of less of an organic acid, a phenolic resin, and a combination of a basic catalyst and a peroxide as a curing catalyst. In addition, additives as a mold release agent such as a polyethylene wax and an inorganic filler are contained. The maleimide resin composition is prepared in such a manner that a part of the phenolic resin is preblended with the curing catalyst in advance of other components, while the remainder of the phenolic resin is added to the maleimide resin to prepolymerize, and then, the preblend and the prepolyer are blended the other components. The maleimide resin composition has excellent moldability by improvement of curing characteristics through combined use of a basic catalyst and a peroxide as a curing agent. Besides, a resin encapsulated semiconductor device manufactured by encapsulating a semiconductor element with the resin composition has excellent heat resistance and moisture-resistance reliability.

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Patent Owner(s)

Patent OwnerAddress
KABUSHIKI KAISHA TOSHIBA72-34 HORIKAWA-CHO SAIWAI-KU KAWASAKI-SHI KANAGAWA 2120013 ?2120013

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujieda, Shinetsu Kawasaki, JP 46 696
Higashi, Michiya Kawasaki, JP 10 205
Shimozawa, Hiroshi Yokohama, JP 7 124
Yoshizumi, Akira Yokohama, JP 21 545

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