Patent ID: 8729474

Claim:
An infrared imaging device comprising: a substrate having a first metal layer disposed at least partially on a surface of the substrate; an infrared detector array coupled to the substrate via a plurality of contacts, wherein each contact comprises: a second metal layer; a metal stud having a first end and a second end and disposed between the first metal layer and the second metal layer, wherein the first end is disposed on a portion of the first metal layer that is at least partially on the surface of the substrate; wherein the second metal layer forms part of a leg metal layer to couple with an infrared detector within the infrared detector array and wherein the second metal layer covers a surface of the second end and wraps around an outer edge of the surface of the second end of the metal stud; wherein a portion of the second metal layer that wraps around the outer edge of the second end forms a depression in the second metal layer; a third metal layer formed on the second metal layer, wherein the third metal layer at least partially fills the depression in the second metal layer; and a first passivation layer formed on the third metal layer.