Patent ID: 7335319
Filing Date: 2008-02-26
Classification: C11D,G03F,H01L

Abstract:
1. An edge bead remover composition comprising: at least one ketone selected from the group consisting of: wherein R methyl, ethyl, n-propyl, and combinations thereof, wherein n equals 1 or 2, and wherein said ketone of said Formula at least one ester other than lactones; and at least one lactone; wherein said at least one ketone is 2-pentanone, present in an amount between 35 wt. % to 50 wt. %; said at least one ester is ethyl lactate, present in an amount between 35 wt. % to 50 wt. %; and said at least one lactone is gamma-butyrolactone, present in an amount between 20 wt. % to 30 wt. %.