Abstract:
PROBLEM TO BE SOLVED: To provide a circuit board manufacturing method which can efficiently form an insulation layer and a metal film layer having excellent adhesion to the insulation layer and excellent uniformity, and which is excellent in laser workability in formation of a blind via by laser beams; and provide a film with a metal film and an adhesive film with the metal film which are used for the manufacturing method.SOLUTION: In a circuit board manufacturing method, a film with a metal film having a plastic film layer, a mold release layer formed on the plastic film layer and a metal film layer formed on the mold release layer in which a contact face of the mold release layer with the metal film layer is formed of one and more kinds of water soluble resins selected from a water soluble cellulose resin, a water soluble polyester resin and a water soluble acryl resin, and the water soluble resin contains one and more kinds selected from metal compound powder, carbon powder, metal powder and a black die is used. Alternatively, an adhesive film with a metal film in which a curable resin composition is formed on the metal film layer of the film with the metal film is used.
Abstract:
A crosslinkable and polymerizable composition containing a monomer and a cross-linking agent is applied onto a metal foil to form a coated film of the composition, and heat is applied to the coated film to firstly bulk polymerize the entire coated film of the crosslinkable and polymerizable composition. Then, by applying heat to the coated film from the metal foil side, cooling a surface far from the metal foil as needed, and subjecting a limited region adjacent to the metal foil in the thickness direction of the coated film to a cross-linking reaction, a composite for multilayer circuit board is obtained, in which the metal foil layer, a hard resin layer containing a hard resin obtained by bulk polymerization reaction and cross-linking reaction, and an adhesive resin layer containing an adhesive resin obtained by bulk polymerization reaction are laminated in this order.
Abstract:
A multiple-layered printed wiring board is manufactured, which exhibits higher thermal resistance and lower thermal expansion so that no flaking and/or no crack would be occurred in a thermal shock test such as a cooling-heating cycle test and the like, in addition to exhibiting a fire retardancy. The resin composition is capable of being employed for forming a resin layer of a resin-attached metal foil or an insulating sheet of a base material-attached insulating sheet, and includes: a cyanate resin and/or a prepolymer thereof; an epoxy resin substantially containing no halogen atom; a phenoxy resin substantially containing no halogen atom; an imidazole compound; and an inorganic filler, and also directed to a resin-attached metal foil formed by cladding a metal foil with such resin composition, a base material-attached insulating sheet formed by cladding an insulating base material therewith, and a multiple-layered printed wiring board, formed by laying such resin-attached metal foil(s) or such base material-attached insulating sheet(s) on a single side or both sides of an internal layer circuit board, and hot pressure forming thereof.