Method of making a lead frame

Details Method of making a lead frame Method of making a lead frame

1992-10-29

1994-12-13

Arbes, Carl J.

Metal working

Method of mechanical manufacture

Electrical device making

437220, H01L 2100, H01R 4300

Patent

active

053719433

ABSTRACT:
A hole is formed in a metal plate, and after a concave portion is formed by pressurizing a predetermined area on the metal plate including the hole to cause plastic deformation, an island of a lead frame is formed in the concave portion. By forming the concave portion, the island and the inner lead are thinner than the outer lead, and the hole which has become smaller remains in the island.

REFERENCES:
patent: 3436810 (1969-04-01), Kauffman
patent: 3559285 (1971-02-01), Kauffman
patent: 3574815 (1971-04-01), Segerson

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