Patent ID: 8801879

Claim:
A process for production of a multilayer film that comprises a support film and a plurality of adhesive films situated on the support film along a lengthwise direction of the support film, the process comprising a step (A) of cutting an adhesive layer formed to cover an entirety of one side of a temporary base in such a manner as to partition a plurality of sections to serve as adhesive films from other sections of the adhesive layer, the plurality of sections being situated along a lengthwise direction of the temporary base either at a prescribed spacing or without spacing, wherein first contact surfaces of the adhesive films contact the temporary base, and a step (B) of moving the adhesive films on the temporary base onto the support film at a prescribed spacing along the lengthwise direction of the support film, wherein when the plurality of sections which are to serve as adhesive films are situated at the prescribed spacing along the lengthwise direction of the temporary base, the spacing between the adjacent adhesive films on the temporary base is narrower than the spacing between the adjacent adhesive films on the support film, second contact surfaces of the adhesive films contact the support film, and the second contact surfaces are on opposite sides of the adhesive films from the first contact surfaces, wherein the multilayer film further comprises pressure-sensitive adhesive films with overhanging sections provided on the adhesive films, which overhang from outer peripheries of the adhesive films, and wherein the production process further comprises a step (a) of attaching the adhesive films and a pressure-sensitive adhesive layer, wherein the pressure-sensitive adhesive layer contacts the first contact surfaces of the adhesive films, a step (b) of cutting the pressure-sensitive adhesive layer on the adhesive films so as to partition a plurality of sections which are to serve as pressure-sensitive adhesive films from other sections of the pressure-sensitive adhesive layer, and a step (c) of removing all or some sections of the other sections of the pressure-sensitive adhesive layer, leaving the pressure-sensitive adhesive films on the adhesive films, and wherein the adhesive films are die bonding adhesive films and the pressure-sensitive adhesive films are dicing pressure-sensitive adhesive films.