Patent ID: 9117804
Filing Date: 2015-08-25
Classification: H01L

Abstract:
1. An silicon interposer structure, comprising: a semiconductor silicon substrate comprising a first surface and a second surface opposite to each other; a plurality of shallow trenches formed on the first surface in a first area and a second area of the semiconductor silicon substrate, respectively, and a plurality of respective openings are correspondingly being formed on the first surface, wherein each two adjacent shallow trenches are separated by a portion of the semiconductor silicon substrate; a plurality of deep trenches formed and extending from at least one of the shallow trenches toward the second surface in the second area of the silicon substrate and a plurality of respective openings being correspondingly formed on the second surface; and a plurality of metal damascene structures filled in the shallow trenches and the deep trenches, wherein the shallow trenches formed in the first area are used as a mask alignment mark for the formation of the deep trenches.