Asahi Kasei Kabushiki Kaisha

Junya Kosaka

Teruhisa Yamada

Shinichi Kunimatsu

Tonami Tajiri

The present invention provides a photosensitive resin multilayer body which is obtained by superposing, on a supporting film, a photosensitive resin layer containing a photosensitive resin composition that contains from 10% by mass to 90% by mass of (A) an alkali-soluble polymer, from 5% by mass to 70% by mass of (B) a compound having an ethylenically unsaturated double bond and from 0.01% by mass to 20% by mass of (C) a photopolymerization initiator; the alkali-soluble polymer (A) contains a copolymer which contains, as a copolymerization component, a (meth)acrylate that has an alkyl group having from 3 to 12 carbon atoms; an acrylate monomer is contained, as the compound (B) having an ethylenically unsaturated double bond, in an amount of from 51% by mass to 100% by mass relative to the total amount of the compound (B) having an ethylenically unsaturated double bond; the absorbance A of the photosensitive resin layer containing the photosensitive resin composition at a wavelength of 365 nm, said photosensitive resin layer having a film thickness T (μm), satisfies the relational expression 0<A/T≤0.007; and the film thickness of the photosensitive resin layer containing the photosensitive resin composition is from 40 μm to 600 μm.

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Tokyo, Japan

Junya Kosaka