Abstract:
PROBLEM TO BE SOLVED: To provide a wiring board and a method of fabricating the same, for improving the reliability of the wiring board by suppressing delamination from being generated between a side face of an electrode pad and a side face of an insulating layer. SOLUTION: The wiring board includes an electrode pad 25 comprising metal layers 41 and 42, a conductor pattern 27 connected to the electrode pad 25 at a part position on the side of the surface 42A of the metal layer 42, and the insulating layer 21 embedded with the electrode pad 25 and the conductor pattern 27. The insulating layer 21 is disposed so as to cover an outer peripheral portion of the surface 41A of the metal layer 41 positioned on the opposite side of the surface 42A. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a flat cable capable of realizing superior flexibility and bending resistance, without impairing the superior electrical characteristics, due to a strip structure, and capable of improving the cost performance. SOLUTION: The flexible flat cable is provided with a first shielding material 16 and a second shielding material 17, fitted so as to coat the surface of the cable body, including a plurality of conductors arranged at a given pitch. The first shielding material 16 and the second shielding material 17 have a metal material 30, formed by intercalating a conductive adhesive layer 31 between a plurality of metal layers 32, 33, respectively, one of the outermost metal layers 32, 33 in electrical continuity with a grounding layer. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing a wiring circuit board which can make an insulation layer thin while preventing generation of bubble reservoirs in the insulation layer and can increase manufacturing efficiency and reduce a manufacturing cost by reducing the number of processes. SOLUTION: A manufacturing method of a suspension board 1 with a circuit includes processes: of preparing a metallic support substrate 2; forming a metal foil 4 on the metallic support substrate 2; forming a base insulation layer 5 on the metal foil 4 so as to expose an unwanted portion 9 of the metal foil 4; etching the unwanted portion 9 with the base insulation layer 5 as an etching resist; and forming a plurality of interconnections 8 on the base insulation layer 5. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a wiring circuit board which can reduce transmission loss and achieve enough adhesion between a metal supporting board and a metal foil by a simplified layer structure and which can ensure superior long-term reliability. SOLUTION: A metal supporting board 2 is prepared, and a metallic thin film 3 is formed thereon by sputtering or electrolytic plating. A metal foil 4 is formed on the metallic thin film 3 by electrolytic plating, and a base insulating layer 5 is formed on the metal foil 4 and the metal supporting board 2. Then, a conductor pattern 6 is formed as a wiring circuit pattern on the base insulating layer 5, and a cover insulating layer 7 is formed on the base insulating layer 5 so as to cover the conductor pattern 6. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing a printed circuit board where an insulation resistance value hardly fluctuates using a two-layered metal sheathed polyimide film. SOLUTION: The printed circuit board comprises a conductive metallic layer formed on a substrate and the substrate metallic layer on at least one surface of the insulation film, the feature is that the width of a lower end section of the conductive metallic layer in a section of the wiring pattern is smaller than that of the upper end section of the substrate metallic layer in the section, in addition, the circuit device is constructed by mounting electronic parts on the printed circuit board. The manufacturing method of the printed circuit board is characterized in that after the substrate metallic layer and the conductive metallic layer are contacted with an etching liquid that dissolves the conductive metal to form the wiring pattern, the liquid is contacted with a first processing liquid that dissolves the metal forming the substrate metallic layer, then, after the liquid is contacted with a micro etching liquid that selectively dissolves the conductive metal, the liquid is contacted with a second processing liquid of chemical composition different from that of the first processing liquid. With the manufacturing method, a migration from the substrate metallic layer hardly takes place, and the fluctuation of the inter-terminal resistance value after voltage is applied is significantly small. COPYRIGHT: (C)2005,JPO&NCIPI