Patent ID: 6759754
Filing Date: 2004-07-06
Classification: H05K

Abstract:
A semiconductor device comprising:a casing constituted by a frame having first and second surfaces and a plurality of through holes penetrating through both of said first and second surfaces, a first panel plate attached to said first surface of said frame, and a second panel plate attached to said second surface of said frame, a printed wiring board on which a semiconductor chip is mounted being accommodated in said casing, wherein a plurality of engaging parts each having a lance or a hole arranged to engage a lance are formed on the peripheries of said first and second panel plates, respectively, said lance being a protruding portion extending toward an outer side direction of said casing, said engaging parts formed on said first panel plate and said engaging parts formed on said second panel plate are inserted into said plurality of through holes formed in said frame, such that said lances are inserted into corresponding ones of said holes, and said first panel plate and said second panel plate each have a similar shape, and the engaging parts each having said lances and the engaging parts each having said holes are alternately arranged in said first and second plates.