Patent ID: 6838359

Claim:
A method of manufacturing a semiconductor device comprising the steps of: epitaxially growing a stack comprising an n-type doped layer of a semiconductor material without first exposing the semiconductor material to a high temperature step of approximately 1000° C. while subjecting the layer simultaneously to a gas flow of an Si precursor and n-type dopant gas for which at least one of a phosphorus-containing compound and an arsenic-containing compound is applied; simultaneously stopping flow of the n-type dopant gas and commencing the flow of GeH 4 gas; growing a first SiGe layer; after completing the first SiGe layer, commencing a flow of B 2 H 6 to form the p-type doped layer; and after completion of the p-type doped layer, simultaneously stopping the B 2 H 6 gas flow and commencing growth of a further layer of semiconductor material, the stack further comprising said further layer and being grown in one continuous growth cycle without any purging cycles.