Method for manufacturing multilayer film
AssigneeHitachi Chemical Company, Ltd.
InventorTsuyoshi Tamaki
Life of this patent
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Abstract
A process for production of a multilayer film that comprises a step in which an adhesive layer formed on a temporary base is situated along the lengthwise direction of the temporary base at a prescribed spacing and cut in such a manner that the plurality of sections which are to serve as adhesive films are partitioned from the other sections, and a step in which the adhesive films on the temporary base are moved onto a support film at a prescribed spacing along the lengthwise direction of the support film. The spacing between the adjacent adhesive films on the temporary base is different from the spacing between the adjacent adhesive films on the support film.
Claims9
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.
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 on the adhesive films are in contact with 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 second contact surfaces of the adhesive films are in contact with 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 different from the spacing between the adjacent adhesive films on the support film and the support film is essentially free of cuts around an outer periphery of the adhesive films.
Dependencies are inferred from the claim text.