Method of manufacturing a lead frame

Details Method of manufacturing a lead frame Method of manufacturing a lead frame

2007-06-26

2007-06-26

Arbes, Carl J. (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S029000, C029S832000, C029S840000, C257S686000

Reexamination Certificate

active

10974910

ABSTRACT:
A manufacturing method of an optical coupling device includes, preparing an elongated lead frame on which a plurality of tie bars are placed between a pair of side rails that are mutually in parallel with each other so as to orthogonally cross the tie bars, with a plurality of lead terminals being placed in a staggered form in a manner so as to orthogonally cross the tie bars, and laterally cutting the elongated lead frame to prepare a plurality of strap-shaped lead frames, in such a manner that the length of protrusion of a cut end of each of the side rails from each of the tie bars is made longer than the length of protrusion of a lead terminal from each of the tie bars.

REFERENCES:
patent: 5606182 (1997-02-01), Yoshida et al.
patent: 6590232 (2003-07-01), Matsuo
patent: 2002/0020906 (2002-02-01), Hirasawa et al.
patent: 6-132561 (1994-05-01), None
patent: 6-350128 (1994-12-01), None
patent: 6-237010 (2004-08-01), None

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