Patent ID: 6528232
Filing Date: 2003-03-04
Classification: C07C,C07D,G03F

Abstract:
A positive photoresist material comprising:a sulfonium salt compound acting as a photo-acid generator, the sulfonium salt compound being designated by a general formula (I), â€ƒwherein R1 and R2 are independently selected from the group consisting of a linear alkyl group, a branched alkyl group, a monocyclic alkyl group and a cross-linked cyclic alkyl group, or R1 and R2 having the saturated alkyl group are linked to each other forming a ring or R1 and R2 are linked to each other forming a ring having a substituted oxo group, R3, R4, R5 and R6 are independently selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group and an alkoxy group having 1 to 4 carbon atoms, X is selected from the group consisting of â€”CH2â€”, â€”C2H4â€” and â€”OCH2â€” (wherein an oxy group is bonded to a benzene ring), and Yâˆ’ is a counter ion.