Patent ID: 9301391
Filing Date: 2016-03-29
CPC Classification: C25D,H01L,H05K

Claim Text:
1. A substrate structure, comprising: a dielectric layer having a first surface and a second surface opposite the first surface; and a plurality of conductive structures embedded in the dielectric layer between the first surface and the second surface of the dielectric layer and connecting the first surface of the dielectric layer to the second surface of the dielectric layer; wherein each conductive structure comprises a first metal layer, a second metal layer and a third metal layer, the first metal layer being entirely exposed on the first surface of the dielectric layer, the third metal layer being entirely exposed on the second surface of the dielectric layer, and the second metal layer being disposed between the first metal layer and the third metal layer; wherein the area of the second metal layer is smaller than the area of the first metal layer and the area of the third metal layer, and the area of the first metal layer is smaller than the area of the third metal layer.