Patent ID: 9153559
Filing Date: 2015-10-06
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate; a buffer portion in the substrate, wherein the buffer portion includes at least one of an air gap and/or a seam; a conductive through via electrode surrounding the buffer portion and penetrating the substrate to be spaced apart from the buffer portion; an isolated substrate portion being a portion of the substrate between the buffer portion and the conductive through via electrode, wherein the conductive through via electrode surrounds the isolated substrate portion and the buffer portion; a buffer insulation layer that is disposed between the buffer portion and the isolated substrate portion to define the buffer portion; an insulation liner between the conductive through via electrode and the substrate; and a diffusion barrier layer between the conductive through via electrode and the substrate, wherein the buffer insulation layer includes a same material as the insulation liner.