Patent ID: 7597195

Claim:
A method for packaging a photosensitive film roll, comprising the steps of: (a) forming a first photosensitive film roll by winding, around a core, a photosensitive film comprising a supporting film and a photosensitive resin composition layer formed on the supporting film, wherein the first photosensitive film roll is disposed inside a light blocking plastic bag; (b) packaging the first photosensitive film roll with a reusable resin case, wherein the resin case is collapsible without generating any waste materials that must be thrown away after the case is collapsed; and (c) after using the first photosensitive film roll, collapsing the resin case without generating any waste materials, wherein the photosensitive resin composition layer comprises a photosensitive resin composition containing a binder polymer and a photopolymerizable compound having at least one polymerizable ethylenically unsaturated group within a molecule and a photopolymerization initiator, and wherein the photosensitive film is suitable for use in manufacturing a printed wiring board; and wherein the resin case consists of a resin having a lower surface energy than the photosensitive resin composition and the binder polymer is a copolymer comprising components selected from the group consisting of (i) at least methacrylic acid alkyl ester and methacrylic acid as monomers, (ii) at least methacrylic acid alkyl ester and acrylic acid as monomers, (iii) at least acrylic acid alkyl ester and methacrylic acid as monomers, and (iv) at least acrylic acid alkyl ester and acrylic acid as monomers.