Patent ID: 9236166
Filing Date: 2016-01-12
CPC Classification: B21F,H01B,H01L

Claim Text:
1. A bonding wire comprising a wire core and a wire jacket fully enveloping the wire core, wherein the wire core comprises a first material selected from the group consisting of copper, copper alloys, and inter-metallic phases containing copper, and the wire jacket comprises a second material selected from the group consisting of aluminum, aluminum alloys, and inter-metallic phases containing aluminum, wherein the bonding wire has an aspect ratio of no more than 0.8, a thickness of the wire jacket is at least 10 microns, an area of the wire jacket comprises 5-50% of the cross-sectional area of the bonding wire, and the bonding wire has a rectangular cross section having a width in a range of 10 to 500 microns and a length in a range of 400 to 4000 microns, and wherein the aspect ratio is a ratio of the width to the length of the rectangular cross section of the bonding wire.