Process of making wire connections in semi-conductor elements

Details Process of making wire connections in semi-conductor elements Process of making wire connections in semi-conductor elements

1975-06-05

1976-03-02

Smith, Al Lawrence

Metal fusion bonding

Process

Plural joints

228 45, 228179, 29628, H01L 21603

Patent

active

039412989

ABSTRACT:
A process characterized in that a linear spare wire conveyed in a tubular member has a wire piece fused-off and retained, at the fused-off end of the wire piece and the spare wire each there being a sphere fused thereon, the wire piece being displaced transverse to the axis of the spare wire and then together with the tubular member conveying the spare wire is moved forward in the direction of the referred-to axis through a predetermined distance in which, during the forward displacement, the sphere formed at the end of the spare wire contacts the tubular piece and is through the pulling-away from the spare wire moved into a position in which this sphere has with reference to a pressing tool for picking up the wire piece is located at a predetermined fixed distance in the direction of the referred-to axis, the wire piece being conveyed transverse to the referred-to axis toward the pressing tool and being picked up by the latter, upon which the tubular member while retaining of the spare wire is moved back into its outlet position, and at both spheres of the wire piece are by means of the pressing tool pressed onto the heated contact locations of the semi-conductor element, whereby during the pressing-on of the spare wire the subsequent wire piece is fused-off in the above-mentioned manner. In a preferred embodiment of the process, the tubular member remains stationary, and the spare wire is essentially embraced in closely spaced relationship by suitable forceps.

REFERENCES:
patent: 3376635 (1968-04-01), Moesker
patent: 3593906 (1971-07-01), Hug
patent: 3626590 (1971-12-01), Miller
patent: 3705288 (1972-12-01), Kabana et al.
patent: 3787966 (1974-01-01), Klossika

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