Patent ID: 11921424
Assignee: HITACHI CHEMICAL COMPANY, LTD. (FIPAS)
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 2:
3. The photosensitive resin composition according to claim 1, wherein the bisphenol novolak type epoxy resin (a1) is at least one selected from the group consisting of bisphenol novolak type epoxy resins having a structural unit represented by the following General Formula (I) and bisphenol novolak type epoxy resins having a structural unit represented by the following General Formula (II):, [in General Formula (I), R11 represents a hydrogen atom or a methyl group, Y1 and Y2 each independently represent a hydrogen atom or a glycidyl group, a plurality of may be the same as or different from each other, and at least one of Y1 and Y2 represents a glycidyl group], [in General Formula (II), R12 represents a hydrogen atom or a methyl group, Y3 and Y4 each independently represent a hydrogen atom or a glycidyl group, a plurality of R12's may be the same as or different from each other, and at least one of Y3 and Y4 represents a glycidyl group], and
the epoxy resin (a2) is at least one selected from the group consisting of a novolak type epoxy resin having a structural unit represented by the following General Formula (III), a bisphenol type epoxy resin having a structural unit represented by the following General Formula (IV), and a triphenolmethane type epoxy resin having a structural unit represented by the following General Formula (V):, [in General Formula (III), R13 represents a hydrogen atom or a methyl group, Y5 represents a hydrogen atom or a glycidyl group, and a molar ratio between hydrogen atoms and glycidyl groups (hydrogen atoms/glycidyl groups) is 0/100 to 30/70], [in General Formula (IV), R14 represents a hydrogen atom or a methyl group, Y6 represents a hydrogen atom or a glycidyl group, a molar ratio between hydrogen atoms and glycidyl groups (hydrogen atoms/glycidyl groups) is 0/100 to 30/70, and a plurality of R14's may be the same as or different from each other], [in General Formula (V), Y7 represents a hydrogen atom or a glycidyl group, a plurality of Y7's may be the same as or different from each other, and at least one is a glycidyl group].