Patent ID: 8143158
Filing Date: 2012-03-27
Classification: B81C,H01L

Abstract:
1. A method of forming a semiconductor device comprising: depositing a protection layer on a topmost interlayer dielectric of a substrate; forming a first getter layer onto the protection layer to remove native oxides from the protection layer; forming a first capping layer onto the first getter layer to prevent oxidation of the first getter layer; forming a first semiconductor layer onto the first capping layer; depositing an oxide layer on the first semiconductor layer, the oxide layer having a via that exposes a portion of the first semiconductor layer; forming a second getter layer onto the exposed portion of first semiconductor layer to remove native oxides from the exposed portion; forming a second capping layer on the second getter layer to prevent oxidation of the second getter layer; forming a second semiconductor layer on the second capping layer; and removing the oxide layer by a buffered oxide etch process.