Patent ID: 9224681
Filing Date: 2015-12-29
Classification: H01L

Abstract:
1. Semiconductor interposer, comprising: a substrate of a semiconductor material having a first side and an opposite second side; at least one conductive wafer-through via comprising metal; at least one recess provided in the first side of the substrate and in the semiconductor material of the substrate, the recess being filled with metal and connected with the wafer-through via providing a routing structure; wherein the exposed surfaces of the metal filled via and the metal filled recess are essentially flush with the substrate surface on the first side of the substrate; wherein the wafer-through via comprises a narrow part and a wider part; there are provided contact elements on said routing structure having an aspect ratio, height:diameter, <1:1, preferably 1:1 to 2:1; and wherein there is a plurality of vias and recesses forming electrical connections between said first and second structures attached to the first and second sides of the interposer, respectively, and a plurality of vias and recesses which are provided for the purpose of adapting the overall coefficient of thermal expansion of the interposer to said value between the values of the first and the second structure, respectively.