Patent ID: 11946157
Assignee: ASM IP HOLDING B.V.
Field: Surface technology, coating (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method for epitaxially growing a boron doped silicon germanium layer comprising:
providing a substrate comprising a monocrystalline surface in a reaction chamber;
performing a plurality of deposition-etch cycles, a deposition-etch cycle comprising the steps of:
exposing the substrate to a gas mixture comprising a silicon precursor, a germanium precursor, and a boron precursor into the reaction chamber, thereby epitaxially growing a boron doped silicon germanium layer on the monocrystalline surface,
purging the reaction chamber, and
after purging the reaction chamber, introducing an etch gas into the reaction chamber; and

while exposing the substrate to the silicon precursor, the germanium precursor, and the boron precursor, maintaining the substrate at a temperature of at most 450° C.,
wherein the silicon precursor comprises a halosilane.