Patent ID: 7087297
Filing Date: 2006-08-08
Classification: B44C,G03F,Y10T

Abstract:
1. A protective film transfer sheet comprising a peelable support and a protective film formed on one surface of the peelable support, wherein the protective film comprises a protective layer having a first surface in contact with said peelable support and an adhesive layer formed on and in contact with a second surface of said protective layer, opposite said first surface, and wherein the adhesive layer contains an ionizing radiation curable resin and a heat-reactive resin different from said ionizing radiation curable resin and has pressure-sensitive adhesiveness, the pressure-sensitive adhesiveness of the adhesive layer being increased by heat imparted after transfer onto the image surface of a photo mask, said adhesive layer being curable by exposure to ionizing radiation, and wherein said heat-reactive resin is an acrylic copolymer of an acrylate or methacrylate monomer, as a first monomer, and a second monomer different from said first monomer and having a hydroxyl group, said heat-reactive resin being formed by radical polymerization and having a weight average molecular weight of 50,000–2,000,000.