Patent ID: 7011531
Filing Date: 2006-03-14
Classification: G01R,H01R,H05K,Y10T

Abstract:
1. A method for forming an electrical interconnection structure, comprising: providing a flexible dielectric layer having a first side and a second side; coupling a first side of a metallic layer to the second side of the flexible dielectric layer; creating a first through via extending through the first side to the second side of the dielectric layer; creating a first blind via offset from the first through via and extending laterally from the first through via in a first direction and extending in a second direction from the first side of the flexible dielectric layer to a section of the flexible dielectric layer that is between the first side and the second side of the dielectric layer; forming a first bump of a metallic material on to the first side of the metallic layer and within the first through via, wherein the metallic material is formed in a third direction, filling the first through via, the first blind via, and extending in the third direction so that any distance between a first surface of the first bump and the first side of the metallic layer is greater than a distance between the first side and the second side of the dielectric layer, and wherein the metallic material extends laterally in the first direction and extends laterally in a direction that is opposite to the first direction; and etching a first pad at the end of the metallic layer, wherein the pad is electrically coupled to the bump, and wherein a first electrically conductive member is formed from the first bump, the filled first through via, the filled first blind via, and the etched first pad.