Patent ID: 8134073

Claim:
For use in an integrated circuit, a composite bond wire electrically connecting components of the integrated circuit, the composite bond wire comprising: an inner portion comprising a material having a first component and a second component at a first ratio, the material at the first ratio having an electrical resistance; and an outer layer surrounding the inner portion, the outer layer comprising the material having the first component and the second component at a second ratio, the material at the second ratio having a lower electrical resistance than the inner portion, wherein the inner portion has a first thickness that is greater than a first skin depth (d 1 ), the first skin depth (d 1 ) described by a first model equation expressed as: d 1 = 2 ⁢ ρ 1 ω 1 ⁢ μ 1 wherein ρ 1 denotes resistivity of the inner portion, ω 1 denotes a first frequency of electrical signals to be applied to the composite bond wire, and μ 1 denotes absolute magnetic permeability of the inner portion, wherein the outer layer has a second thickness that is greater than a second skin depth (d 2 ), the second skin depth (d 2 ) described by a second model equation expressed as: d 2 = 2 ⁢ ρ 2 ω 2 ⁢ μ 2 wherein ρ 2 denotes resistivity of the outer layer, ω 2 denotes a second frequency of electrical signals to be applied to the composite bond wire, and μ 2 denotes absolute magnetic permeability of the outer layer.