Abstract:
PROBLEM TO BE SOLVED: To provide a positive photosensitive resin composition which can be pressure-bonded to a substrate or the like, has flame retardancy and reduces warpage in dry film formation, and a photosensitive film comprising the photosensitive resin composition. SOLUTION: The photosensitive resin composition comprises (A) an alkali-soluble resin, (B) a light-sensitive material and (C) a phosphoric ester compound represented by general formula (1), wherein R 1 is a 1-30C aliphatic organic group and three symbols R 1 may be the same or different. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a resin composite copper foil which is excellent in adhesive force with a resin composition of a copper-clad laminated sheet, to which a copper foil with a copper foil matting face with an extremely small unevenness can be applied, and which is suitable for mass production, and to provide the copper clad-laminated sheet and a printed wiring board using this resin composite copper foil and having good heat resistance and good moisture absorbing heat resistance. SOLUTION: The resin composite copper foil formed with a resin layer comprising a block copolymer polyimide resin (a) and 2,2-bis[4-(4-maleimidephenoxy)phenyl]propane (b) on one face of the copper foil, the copper-clad laminated sheet in which the resin composite copper foil and a B-stage resin composition layer are laminated and molded, and the printed wiring board using this, are provided. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an electrodeposited polyimide thin film which is deposited on a conductor metal such as copper and has excellent adherability. SOLUTION: The electrodeposited polyimide thin film is deposited from a polyimide electrodeposition solution by electrodeposition, which solution is an aqueous solution or a mixed solvent solution of water and an organic solvent, containing a polyimide compound selected from polyimide precursors each having carboxyl group in the molecular structure and anionic polyimides. A method for electrodepositing the electrodeposited polyimide thin film comprises using, as an anode, a base material formed from a metal, which ionizes and dissolves in the polyimide electrodeposition solution by an electrode reaction when a current is supplied for electrodeposition, and electrodepositing the thin film on the base material through a metal layer or a metal compound layer, which does not ionizes by an electrode reaction and does not dissolves in the polyimide electrodeposition solution when a current is supplied for electrodeposition. The electrodeposited polyimide thin film is deposited by the method. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method for a printed-wiring board being capable of easily forming an extremely fine-line circuit and having the excellent adhesive strength and heat resistance of a copper plating layer. SOLUTION: In the manufacturing method for the printed-wiring board, a B-stage resin composition layer is laminated and molded on the resin-layer surface of a resin composite copper foil forming a block copolymerizing polyimide resin and a resin layer containing a polymaleimide compound on one surface of a copper foil. In the manufacturing method, all the copper foil are etched and removed, the resin-layer surface is exposed and the electroless copper plating layer 5 is formed on the whole surface without irregularly treating the resin-layer surface. An electrolytic copper plating layer is formed, and the electroless copper plating layer 5 and the electrolytic copper plating layer are etched and removed selectively and a copper circuit is formed. Alternately, the electroless copper plating layer 5 is formed, the electrolytic copper-plating pattern layer is formed selectively on the electroless copper plating layer and the electroless copper plating layer forming no electrolytic copper plating layer is etched and removed and the copper circuit is formed. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a resin composite copper foil capable of using a copper foil extremely small in its surface unevenness and excellent in the adhesive strength with the resin composition of a copper clad laminate, a copper clad laminated sheet good in heat resistance or hygroscopic heat resistance using the resin composite copper foil, a copper clad laminated good in heat resistance or hygroscopic heat resistance using the resin composite copper foil, and a printed wiring board. SOLUTION: The resin composite copper foil is constituted by forming a block copolymer polyimide layer on one side of a copper foil. The copper clad laminated sheet is obtained by laminating the resin composite copper foil and a B-stage resin composition layer to mold both of them. The printed circuit board is obtained using the copper clad laminated sheet. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a block copolymer polyimide composition soluble in a ketonic and/or ethereal solvent which cannot be easily influenced by the water from the surrounding environment. SOLUTION: The solvent of a polyimide is generally a polar solvent such as N-methylpyrrolidone, N,N-dimethylformamide, N,N-dimethyacetamide and dimethyl sulfoxide. These nonaqueous solvents are however sensitive to water and very liable to absorb water, thus causing a whitening phenomenon on the surface of a polyimide. The solubility of a polyimide is improved by blocking the composition of the polyimide by using a lactone and a base as catalysts, so that the polyimide becomes soluble in a ketone and/or ethereal solvent, in which the polyimide has not hitherto been soluble. Since the ketonic and ethereal solvent is scarcely affected by water, the whitening phenomenon on the surface of a polyimide due to moisture absorption can be suppressed to the utmost. COPYRIGHT: (C)2006,JPO&NCIPI