Patent ID: 8685845
Filing Date: 2014-04-01
Classification: H01L

Abstract:
1. An epitaxial deposition method comprising: depositing an n-type conductivity silicon doped with carbon (Si:C) monocrystalline semiconductor material on a semiconductor deposition surface using a deposition gas precursor comprising a silane containing gas prescursor, a carbon containing gas precursor, and an n-type gas dopant source, wherein the deposition gas precursor is introduced to the semiconductor deposition surface with a hydrogen (H etching epitaxial amorphous semiconductor material or epitaxial polysilicon selectively to the n-type conductivity silicon doped with carbon (Si:C) monocrystalline semiconductor material, wherein the etch reaction comprises hydrogen chloride (HCl) gas etchant, a pressure ranging from 250 Torr to 450 Torr, and a hydrogen (H measuring a thickness of the n-type conductivity silicon doped with carbon (Si:C) monocrystalline semiconductor material; and repeating steps of depositing the n-type conductivity silicon doped with carbon (Si:C) monocrystalline semiconductor material, the etching of the epitaxial amorphous semiconductor material or epitaxial polysilicon, and the measuring of the thickness of the n-type conductivity silicon doped with carbon (Si:C) until a measured thickness is equal to a predetermined thickness.