Patent ID: 6878578
Filing Date: 2005-04-12
Classification: H01L

Abstract:
1. A method for forming a chemical oxide comprising: (a) providing a semiconductor structure; (b) subjecting said semiconductor structure to a first solution for a first time period; (c) purging said first solution with de-ionized water; (d) subjecting said semiconductor structure to a second solution containing a concentration of HCl; (e) adding to said second solution for a second time period; (f) after said second time period, adding ozone to said second solution while diminishing said concentration of HCl to substantially zero and maintaining said HF at a maximum HF concentration, whereby a thickness of silicon is removed from a surface of said semiconductor structure; (g) diminishing said HF concentration to substantially zero while maintaining said ozone at a maximum ozone concentration; (h) maintaining said maximum ozone concentration for a third time period whereby a chemical oxide is formed on said semiconductor structure.