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US 6,610,930 B1Granted
Composite noble metal wire
AssigneeKulicke & Soffa Investments, Inc.
InventorJeffrey Michael Seuntjens
Life of this patent
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Abstract
Composite wires in which a noble metal annulus is welded to an electrically-conductive, non-noble metal wire core. Methods of forming the composite wire and semiconductor packaging having at least one lead bonded to the composite wire are also disclosed.
Claims12
A composite wire drawn from a co-extrudate having a diameter greater than about 15 microns and less than about 100 microns, and consisting essentially of a 4N gold alloy annulus surrounding a wire core comprising an electrically-conductive, non-noble metal, said composite wire having one or more of the following properties:
- (a) a resistivity between about 1.70 and about 2.00μ ohm cm;
- (b) a modulus between about 95 and about 120 GPa;
- and
- (c) a composite density between about 9.0 and about 15.0 g/cc.
1 more element
Dependencies are inferred from the claim text.