Sharp Kabushiki Kaisha Corporation

Nippon Kayaku Co., Ltd

Touru Ozaki

Noriaki Onishi

Aya Miyazaki

Daisaku Matsunaga

A photoinitiator is represented by general formula (I): ##STR1## where n is an integer of 1 or greater; A and B are each a trans cyclohexane ring or a benzene ring, the benzene ring being allowed to include a fluorine atom or a methyl group as a substituent, the benzene ring adjacent to a carbonyl group being allowed to include a fluorine atom or a methyl group as a substituent; p and q are each 0 or 1, p and q are not simultaneously 0; X is an alkyl group of C.sub.1 through C.sub.3 or hydrogen atom, Y is a methyl group, ethyl group or alkoxy group of C.sub.1 through C.sub.3, and Z is a methyl group, ethyl group, alkyl-substituted phenyl group or a group represented by general formula (II), Y and Z being allowed to bonded together to form a ring: ##STR2## where A, B, n, p and q are identical with those in general formula (I).

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Touru Ozaki