| abstract |
The present invention relates to compounds of the general formulas I, IIa, IIb, III and IV and their preparation methods, wherein Ar 1 is a substituted orthoarylene group, ortho-heteroarylidene; Ar 2 is a bisorthoarylene group, bisortho-heteroarylidene in various ways; Y 1 is O, S, NR 20 , BR 20 , CR 15 R 16 , SiR 15 R 16 , S = O, C = O; Z 1 is a single bond, a C 1 -C 10 alkydene group, an arylene group; Each of R 1 , R 15 , R 16 and R 20 is a hydrogen atom, an alkyl group or an alkoxy group, an alkyl group or an alkoxy group substituted with an arbitrary group, a cycloalkyl group, an aryl group substituted with an arbitrary group, or an acyl group. The present invention relates to a photocurable combination comprising a compound represented by the general formula I, IIa, IIb, III and IV as a photoinitiator. When this photoresist component such as a display board for photolithography is manufactured with this combination, it shows a good overall function. (I) (IIa) (IIb) (III) (IV) |