Patent ID: 6946727
Filing Date: 2005-09-20
Classification: H01L

Abstract:
1. A vertical routing structure inside a substrate for connecting a first trace line and a second trace line electrically, wherein the substrate has a stack layer, a first patterned circuit layer, and a second patterned circuit layer, the first patterned circuit layer on a first surface of the stack layer forms the first trace line, and the second patterned circuit layer on a second surface of the stack layer forms the second trace line, the vertical routing structure comprising: a conductive rod that passes through the stack layer such that a first surface and a corresponding second surface of the conductive rod are exposed on the first surface and the second surface of the stack layer; a first bonding pad on the first surface of the conductive rod and formed of the first circuit layer, wherein the first bonding pad is connected to the first trace line and the transverse sectional area of the first bonding pad is smaller than the transverse sectional area of the first surface of the conductive rod; and a second bonding pad on the second surface of the conductive rod and formed of the second circuit layer wherein the second bonding pad is connected to the second trace line.