Production of lead frame

Details Production of lead frame Production of lead frame

1991-09-06

1993-06-22

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

29827, 156656, 1566611, 156644, 156901, 437220, 257666, B44C 122, C23F 100

Patent

active

052214281

ABSTRACT:
A method for producing a lead frame which comprises selectively forming a photoresist film on both sides of a lead frame material of three-layered structure, with an etching stop layer interposed between two metal layers, etching both sides thereof using the photoresist film as a mask, and removing the unnecessary part of the etching stop layer.

REFERENCES:
patent: 3773628 (1973-11-01), Misawa

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