Patent ID: 7564138

Claim:
An integrated circuit chip comprising: one or more heat-sensitive structures; at least one spacer overlying one surface of the integrated circuit chip, the spacer made from a heat curable spacer-bonding material selected from the group consisting of polyimide and photo benzocyclobutene, that bonds to another integrated circuit chip, said spacer being positioned on the surface sufficiently distant from said one or more heat sensitive structures such that said heat sensitive structures are not substantially affected by heating of said spacer, said spacer including; at least one wire terminated in respective metal end pads at its two ends, wherein the two end pads overlie and are affixed to the surface of the integrated circuit chip, the wire is offset from the surface of the integrated circuit chip and the other integrated circuit chip by the spacer such that it is not in direct physical contact with either chip where offset, and adapted to heat said spacer-bonding material to a sufficient temperature wherein upon passing an electric current through the wire, the spacer is heated to a curing temperature of the spacer bonding material and maintained for a time sufficient to complete its curing, such that where the wire is offset, it is surrounded by spacer bonding material which is interposed between the wire and the integrated circuit chips.