Hitachi, Ltd.

Masahiro Kitamura

Kunihiko Nishi

Hiroshi Suzuki

Shunichi Numata

Tadanori Segawa

Resin encapsulated electronic devices are provided by encapsulating so-called flat-shaped, plate-like, or angular-shaped electronic devices with a resin composition containing rubber-like particles preferably having an average particle size of 150 .mu.m or less. In the course of production of said resin encapsulated electronic devices, no crack is produced in the electronic devices by the stress from the outside, and after production, said resin encapsulated electronic devices are amazingly lessened in formation of cracks by thermal stress and have high reliability.

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Hitachi, Japan

Masahiro Kitamura