Patent ID: 8176628
Filing Date: 2012-05-15
Classification: H01L,H05K,Y10T

Abstract:
1. A method of forming a protruding post substrate package comprising: applying a dielectric layer to a carrier; forming via apertures in the dielectric layer; creating carrier cavities in the carrier using the dielectric layer as a mask; lining the carrier cavities with a first metal, the first metal being selectively etchable compared to the carrier; filling the carrier cavities with a second metal, wherein the first metal and the second metal form protruding posts; forming a seed layer over a second surface of the dielectric layer, on sidewalls of the via apertures, and on the second metal; filling the via apertures with a circuit pattern metal to form vias in the via apertures, the vias being electrically connected to the protruding posts, wherein the circuit pattern metal covers the seed layer; forming a circuit pattern electrically connected to the vias comprising: removing the exposed portions of the circuit pattern metal and underlying portions of the seed layer using the circuit pattern buildup layer as a mask; and removing the carrier, wherein the protruding posts comprising the first metal protrude outward from a first surface of the dielectric layer.