Double cone wire bonding capillary

Details Double cone wire bonding capillary Double cone wire bonding capillary

1988-04-25

1990-12-04

Ramsey, Kenneth J.

Metal fusion bonding

Including means to force or clamp work portions together...

Work portion comprises electrical component

228 45, H01L 21603

Patent

active

049747673

ABSTRACT:
The disclosure relates to a wire bonding capillary having a body with a cylindrical upper portion and a contiguous lower tip portion, the tip portion having an exterior inward taper and an internal bore extending through the body, the bore having a first substantially constant cross sectional region extending through the cylindrical portion, a second inwardly tapering region contiguous to the first region, a third substantially constant cross sectional region contiguous to the second region, a fourth outwardly tapering region contiguous to the third region and a fifth outwardly tapered region contiguous to the fourth region having greater outward taper than the fourth region. The fourth region has a taper from about forty-five degrees to about ninety degrees and preferably seventy degrees and is substantially bisected by the axis of the bore and the taper in the fifth region is from about one hundred degrees to about one hundred seventy degrees and preferably one hundred ten degrees and is substantially bisected by the axis of the bore.

REFERENCES:
patent: 3358897 (1967-12-01), Christensen
patent: 3917148 (1975-11-01), Runyon
patent: 4415115 (1983-11-01), James

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