Method of molding resin for sealing an electronic device

Details Method of molding resin for sealing an electronic device Method of molding resin for sealing an electronic device

1993-12-21

1995-07-25

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Vacuum treatment of work

To degas or prevent gas entrapment

26427214, 26427217, 2643285, 4251291, 425544, 425420, B29C 4502, B29C 4563, B29C 4572

Patent

active

054359538

ABSTRACT:
In a method for molding resin to seal an electronic part, a sealed space portion is formed between molding surfaces of an upper mold section and a lower mold section by covering an outer side periphery of a pot, a resin path and a cavity. A resin tablet is heated at its bottom portion and peripheral portion in the pot of the lower mold section to expand upwardly from its top portion. Air and moisture included inside the resin tablet is expelled into the sealed space portion which is evacuated including any air and moisture inside the sealed space portion, whereby the formation of voids in the molded resin body is avoided.

REFERENCES:
patent: 4793785 (1988-12-01), Osada
patent: 5059373 (1991-10-01), Hirabayashi
patent: 5082615 (1992-01-01), Sakai

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