Patent ID: 7602064
Filing Date: 2009-10-13
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate; a plurality of layers including a surface layer of said semiconductor substrate and stacked layers provided over said semiconductor substrate with intervening insulation films there between, one of said layers having a first portion made of a first material and a second portion laterally adjacent to said first portion and made of a second material, said first material being different from said second material, another one of said layers being stacked above said one of said layers and having an interconnect portion and a third portion made of a third material different from said interconnect portion; and an inspection hole having a top surface thereof facing to said third portion of said another one of said layers and having a bottom surface thereof facing only to said one of said layers, said inspection hole at said bottom surface thereof exposing a boundary between said first portion and said second portion of said one of said layers.