Patent ID: 9620356
Date: 2017-04-11
CPC Classifications: C30B,H01L

Claim:
1. A method of depositing an epitaxial layer on a substrate disposed in a processing chamber, comprising: supplying a gas mixture having a first ratio of dichlorosilane gas to chlorine containing gas into the processing chamber; altering the gas mixture supplied to the processing chamber from the first ratio to a second ratio of dichlorosilane gas to chlorine containing gas, wherein the first ratio has a higher gas flow of dichlorosilane gas than a gas flow of dichlorosilane gas in the second ratio; maintaining a temperature of the substrate disposed in the processing chamber between 600 degrees Celsius and 1000 degrees Celsius; and forming a doped silicon containing epitaxial layer in an opening formed in the substrate, the epitaxial layer formed from the gas mixture and filling the opening in the substrate, wherein the first ratio of dichlorosilane gas to chlorine containing gas is between 1:10 and 10:10, and wherein the second ratio of dichlorosilane gas to chlorine containing gas is between 1:10 and 10:10.