Patent ID: 9617656
Date: 2017-04-11
CPC Classifications: C30B,H01L

Claim:
1. A method performed in sequential order comprising: (a) first, heating a substrate of silicon (Si) in a chamber, wherein the chamber's temperature is above 950° C.; (b) second, changing the chamber's temperature from the above 950° C. to a second temperature and flowing hydrogen (H (c) third, forming a layer on the substrate of Si having no nitride (N) at least by: (d) fourth, flowing trimethylaluminum (Al (e) fifth, changing the chamber's temperature from the third temperature to a fourth temperature and flowing a subsequent amount of ammonia into the chamber while the trimethylaluminum is still flowing into the chamber, wherein the subsequent amount of ammonia is greater than 0.002% by volume of the hydrogen flowing into the chamber, wherein the first temperature, second temperature, and third temperature are different from each other.