Abstract:
PROBLEM TO BE SOLVED: To provide an FPC connection method for a protection panel with a touch input function at a low cost and with a high degree of freedom in component packaging or material selection.SOLUTION: The present invention relates to a method for electrically connecting an FPC with a lower circuit and an upper circuit via a through-hole provided in a lower electrode panel for a protection panel with a touch input function. In the FPC, a circuit is provided on one side of a film substrate, and a charging hole passing through both the film substrate and the circuit is opened at a connecting-side terminal portion. In the connecting-side terminal portion of the FPC, an insulated adhesive layer is provided while leaving the surroundings of the charging hole, the FPC is adhered to a lower surface of the lower electrode panel by the insulated adhesive layer, the FPC is then electrically connected with the lower circuit and the upper circuit by charging the inside of a cavity facing the charging hole with a conductive adhesive, and after the conductive adhesive is cured while being exposed to the charging hole, the charging hole is finally sealed by a sealing material.
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a wiring board incorporating a semiconductor chip for simplifying a manufacturing process and suppressing stress to the semiconductor chip.SOLUTION: The semiconductor chip 50 where a stud bump 52a is installed in an electrode 51a and a thermosetting resin film 21b where a pad 31 is formed are arranged so that the stud bump 52a is confronted with the pad 31 via a thermoplastic resin film 22b. A thermoplastic resin film 22c in which a via hole is filled with conductive paste is disposed so that electrodes 51b and 51c are confronted with conductive paste on an electrode forming face-side where the electrodes 51b and 51c in the semiconductor chip 50 are formed. In a pressurizing/heating process, the electrode 51a is bonded to the stud bump 52a and the stud bump 52a to the pad 31 by solid-phase diffusion bonding, and the electrodes 51b and 51c are bonded to the conductive paste in the thermosetting resin film 21b by liquid-phase diffusion bonding.
Abstract:
A multilayer circuit board includes a laminate having a plurality of ceramic layers, and a wiring pattern disposed in the laminate, wherein a ceramic layer includes, as the wiring pattern, a fully penetrating via-hole conductor that vertically passes through the ceramic layers, and a serial partially penetrating via-hole conductor that is electrically connected to the fully penetrating via-hole conductor in the ceramic layers and does not pass completely through the ceramic layers.
Abstract:
PROBLEM TO BE SOLVED: To solve the problems of a conventional multilayer wiring board having vias formed by plating and a defect liable to exfoliate partially, or to form a void internally. SOLUTION: In the multilayer wiring board 20, wiring patterns 18, 28, and 28 of three layers are laminated with an insulating layer 12 therebetween, and the wiring patterns 28 and 28 on both sides sandwiching the intermediate wiring pattern 18 are connected electrically by a via 30 formed by filling plating metal in the through hole for via penetrating the intermediate wiring pattern 18 arranged in the middle of the wiring patterns 28 and 28 while penetrating the insulating layer 12. In the through hole for via, a small hole having a diameter smaller than the inner diameter of the bottom face of a recess formed in each of the insulating layers 12 and 12 sandwiching the intermediate wiring pattern 18 is bored in the intermediate wiring pattern 18 exposed to the bottom face of the recess, and the plating metals filling the respective recesses are connected integrally through the small holes to form the via 30. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a multilayered printed circuit board and a method of fabricating the printed circuit board that can provide high reliability, since stress-relieving insulation layers can prevent bending and warpage, etc., in the board overall. SOLUTION: The method of fabricating the multilayered printed circuit board can include the steps of: providing a core substrate, which has an outer circuit, and which has a thermal expansion coefficient of 10 to 20 ppm/°C at -60 to 150°C; stacking a stress-relieving insulation layer, which has a thermal expansion coefficient of -20 to 6 ppm/°C, on either outer side of the core substrate; and forming a metal layer on the insulation layer and then forming a pad, and electrically connecting the pad with the outer circuit. COPYRIGHT: (C)2011,JPO&INPIT