Patent ID: 6537370
Filing Date: 2003-03-25
Classification: C30B

Abstract:
Process for forming a layer of single-crystal germanium on a substrate of single-crystal silicon, comprising:(a) heating the single-crystal silicon substrate to a first temperature (T1) of about 400 to 500Â° C.; (b) depositing germanium by chemical vapor deposition (CVD) at the first temperature (T1) until a germanium base layer with a thickness of less than a final thickness is obtained on the substrate; (c) increasing the germanium CVD deposition temperature from the first temperature (T1) to a second temperature (T2) ranging from about 750Â° C. to 850Â° C.; and (d) depositing germanium by CVD deposition at the second temperature (T2) until the final thickness of the single-crystal germanium layer is obtained.