Method for wire-bonding a covered wire

Details Method for wire-bonding a covered wire Method for wire-bonding a covered wire

1996-12-05

1998-07-07

Graybill, David

Fishing, trapping, and vermin destroying

437183, 437204, 2281805, 228904, H01L 21283, H01L 21603

Patent

active

057767866

ABSTRACT:
To assure that a loop height remains constant even if the wiring distance should vary and no slack is generated in the hypotenuse of the bonded wire: the length of the covered wire required for a next wiring operation is set by a formula which combines a first-order function of a wiring distance, a first-order reciprocal function of the wiring distance and a constant; the covering-film at the corresponding position is removed; and the exposed-core portion of the covered wire from which the covering-film has been removed is bonded to the lead of a lead frame with the loop height fixed even if the wiring distance should change.

REFERENCES:
patent: 4597522 (1986-07-01), Kibayashi
patent: 4864514 (1989-09-01), Yamanaka

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