Patent ID: 7374811
Filing Date: 2008-05-20
Classification: G01R,H05K,Y10T

Abstract:
1. A ceramic device, comprising: a ceramic layer, wherein the ceramic layer has disposed therein a plurality of metal vias; a polyimide layer, on the ceramic layer, having disposed therein a plurality of copper vias; wherein a first cross-sectional area of a first copper via, of the plurality of copper vias, is greater than a second cross-sectional area of a second copper via, of the plurality of copper vias; wherein the first copper via is not in physical contact with the second copper via; the first cross-sectional area of the first copper via, of the plurality of copper vias, is greater than a third cross-sectional area of a particular metal via, of the plurality of metal vias; the first copper via is in physical contact with the particular metal via of the plurality of metal vias, and the second copper via is not in physical contact with any metal via of the plurality of metal vias; a plurality of pads formed on the polyimide layer, wherein each of the plurality of pads is in physical contact with one copper via of the plurality of copper vias.