Patent ID: 6394104
Filing Date: 2002-05-28
Classification: C23G,H01J,H01L,Y10S

Abstract:
A method of removing polymer buildup from the surfaces of an etching chamber comprising:providing said etching chamber in which spin-on-glass etchback is performed whereby said polymer buildup is formed on said surfaces of said chamber including an upper electrode in said chamber; placing a dummy wafer into said etching chamber; and removing said polymer buildup from said surfaces of said chamber including said upper electrode using a dry plasma cleaning process comprising flowing Ar at 300 to 500 sccm, flowing O2 at 15 to 100 sccm, and flowing CF4 at 40 to 100 sccm under a pressure of 200 to 600 mTorr and power of 500 to 1000 watts for a duration of 20 to 50 minutes.