Patent ID: 7291565
Filing Date: 2007-11-06
Classification: B08B,C11D

Abstract:
1. A method of treating a substrate comprising: placing said substrate having an open metal surface thereon into a high pressure processing chamber and onto a platen configured to support said substrate; forming a supercritical fluid from a carbon dioxide fluid by adjusting a pressure of said carbon dioxide fluid above the critical pressure of said carbon dioxide fluid, and adjusting a temperature of said carbon dioxide fluid above the critical temperature of said carbon dioxide fluid, wherein said temperature is in the range of approximately 100° C. to approximately 300° C.; introducing said supercritical carbon dioxide fluid to said high pressure processing chamber; introducing a first process chemistry comprising fluorosilicic acid and butyrolactone (BLO) to said supercritical carbon dioxide fluid; exposing said substrate to said supercritical carbon dioxide fluid and said first process chemistry for a first time duration; thereafter, introducing a second process chemistry comprising fluorosilicic acid and isopropyl alcohol (IPA) to said supercritical carbon dioxide fluid; exposing said substrate to said supercritical carbon dioxide fluid and said second process chemistry for a second time duration; thereafter, introducing a third process chemistry comprising a mixture of methanol and water, or 2-butanone peroxide, to said supercritical carbon dioxide fluid; exposing said substrate to said supercritical carbon dioxide fluid and said third process chemistry for a third time duration.