Patent ID: 9011599
Filing Date: 2015-04-21
Classification: C30B,H01L,Y10T

Abstract:
1. A method of determining a temperature in a deposition reactor, comprising: a) heating the deposition reactor to approximately a first temperature using a heating device and a temperature measuring device; b) depositing a first epitaxial layer of silicon germanium on a substrate; c) depositing a second epitaxial layer of silicon above the first epitaxial layer; d) measuring the thickness of the second epitaxial layer; e) comparing the measured thickness of the second epitaxial layer with an expected thickness of the second epitaxial layer corresponding to the first temperature; and f) determining the temperature in the deposition reactor using the measured thickness of the second epitaxial layer and a known relationship between the thickness of the second epitaxial layer and the temperature in the deposition reactor.