Patent ID: 6403823
Filing Date: 2002-06-11
Classification: C07C,G03F

Abstract:
An ester compound of the following general formula (1): wherein R1 is hydrogen or a straight, branched or cyclic alkyl group of 1 to 6 carbon atoms R2 is an acyl or alkoxycarbonyl group of 1 to 15 carbon atoms in which some or all of the hydrogen atoms on the constituent carbon atoms may be substituted with halogen atoms, R3 is an acid labile group, represented by wherein R5 to R8 are independently selected from straight, branched or cyclic alkyl groups of 1 to 15 carbon atoms, the sum of carbon atoms in R5, R6 and R7 is at least 5 and at least one of R5 to R7 is a cyclic alkyl group of 3 to 15 carbon atoms, and Z is a divalent hydrocarbon group of 4 to 15 carbon atoms which form a ring with the carbon atom to which it is connected at opposite ends, k is 0 or 1, and m is an integer from 0 to 5.