A photosensitive resin composition includes an alkali-soluble resin (A), a compound having an unsaturated vinyl group (B), a photo initiator (C), solvent (D) and a silane compound (E) having a structure shown as formula (I): ##STR00001## in the formula (I), A individually and independently represents a single bond, an alkylene group, or an arylene group, B individually and independently represents an organic group having diphenyl phosphine, hydrogen atom, an alkyl group, an aryl group, or OR, in which R is a C1-C6 alkyl group or a phenyl group, at least one B is the organic group having diphenyl phosphine and at least one B is OR. When B is OR, A connected to B is the single bond. A film formed by the photosensitive resin composition has good refractivity and adhesivity to molybdenum.

A photosensitive resin composition includes an alkali-soluble resin (A), a compound having an unsaturated vinyl group (B), a photo initiator (C), solvent (D) and a silane compound (E) having a structure shown as formula (I):

##STR00001## in the formula (I), A individually and independently represents a single bond, an alkylene group, or an arylene group, B individually and independently represents an organic group having diphenyl phosphine, hydrogen atom, an alkyl group, an aryl group, or OR, in which R is a C1-C6 alkyl group or a phenyl group, at least one B is the organic group having diphenyl phosphine and at least one B is OR. When B is OR, A connected to B is the single bond. A film formed by the photosensitive resin composition has good refractivity and adhesivity to molybdenum.

A photosensitive surface treating agent containing a compound represented by the following Formula (M1). (In Formula (M1), R.sup.1 is a hydrogen atom, a tert-butoxycarbonyl group or an ester-based protecting group, R.sup.2 is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, m is an integer of 1 or more, and X is a halogen atom or an alkoxy group.

##STR00001##