Process for connecting lead frame to semiconductor device

Details Process for connecting lead frame to semiconductor device Process for connecting lead frame to semiconductor device

1988-05-12

1989-03-28

Hearn, Brian E.

Fishing, trapping, and vermin destroying

437206, 437220, 357 70, 357 68, 29827, 439 68, H01L 2348

Patent

active

048164275

ABSTRACT:
A lead frame having opposite rows of leads to be connected to the edges of a semi-conductor device and heads on one end of said leads provided with similar angularly related legs between which the edges of the device are received for ultimate soldered connection thereto, the leads and corresponding heads respectively extending from opposite sides of an elongated supporting strip connected at the ends thereof to spaced locations on the lead frame and when the ends of the leads extending from one side of the strip are depressed from the plane of the frame, the ends of the strip where connected to the frame are twisted to extend the headed ends of the leads upwardly and thereby cause the uppermost legs of the heads of opposite rows thereof to be spaced apart a distance greater than the width of the device to be connected thereto while the ends of the rows of lowermost legs of the heads are closer together than the width of the device and receive the same for support thereon prior to the rows of leads being restored to the plane of the frame and thereby cause the opposite rows of uppermost legs to be extended toward each other and overlie the edges of the device and in conjunction with the lowermost legs of the heads secure the device between the legs of the opposite rows of heads.

REFERENCES:
patent: 3838984 (1974-10-01), Crane et al.
patent: 4109096 (1978-08-01), Dehaine
patent: 4196959 (1980-04-01), Chesemore et al.
patent: 4234666 (1980-11-01), Gursky
patent: 4293890 (1981-10-01), Varsane
patent: 4323293 (1982-04-01), De Rouen et al.
patent: 4496965 (1985-01-01), Orcutt et al.

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