Patent ID: 6884570
Filing Date: 2005-04-26
Classification: G03F

Abstract:
1. A method of forming resist pattern film which comprises the following successive steps: (1) applying a positive actinic ray decomposing and developing dry film having on the surface of a nonactinic ray decomposing and developing substrate, a solid positive actinic ray decomposing and developing urethane resin layer formed by coating and heat-crosslinking a resin composition onto a surface of a coating substrate consisting of a through-hole plated, both side copper-cladded laminate so that the surface of the coating substrate may face to the urethane resin layer of the positive actinic ray decomposing and developing dry film, said resin composition being (1) a resin composition containing, as essential components, (A (2) optionally stripping the non-actinic ray decomposing and developing substrate of the dry film, (3) irradiating an actinic ray through a mask or directly onto the surface of the dry film so as to obtain an intended pattern, optionally followed by heat treating, (4) stripping the non-actinic ray decomposing and developing substrate not stripped in the above step (2), (5) subjecting the positive actinic ray decomposing and developing urethane resin layer to a developing treatment, and (6) removing an irradiating area of the urethane resin layer to form a resist pattern film, either step (1) or (2) including a step of heat treating, and (7) etching the exposed copper cladded laminate.