Abstract:
PROBLEM TO BE SOLVED: To provide a production process of a printed wiring board which incorporates an electronic component and enhances connection reliability. SOLUTION: An IC chip 30 is mounted with reference to a positioning mark 26 formed on a single-sided copper clad laminate 20, a through-hole 36 is bored to reach the terminals 30A and 30B of the IC chip 30, and the through-hole 36 is filled with metals 38 and 40, thus providing a via hole 42 for connecting the terminals of a chip capacitor 30. Since a position gap does not arise between the terminal 30A, 30B of the chip capacitor 30 and the via hole 42, connection reliability of the via hole 42 for connecting the terminals of the chip capacitor can be enhanced. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a wiring substrate capable of preventing deformation such as a warpage or the like, or substantially reducing the amount of deformation; to provide its manufacturing method; and to prevent conveyance failure and mounting failure caused by deformation of the wiring substrate in an electronic mounting process. SOLUTION: In the wiring board, one or more layers having a coefficient of thermal expansion different from that of a core layer are laminated on at least one surface side of the core layer, and a plurality of mounting regions to which a plurality of electronic components are mounted are formed on the surface layers of the laminated layers with prescribed spaces left between them. The core layer is divided for each mounting region or correspondingly to a group of the mounting regions covering a plurality of the mounting regions, and an insulating material forming the laminated layers is filled in a gap between the mutually adjoining core layers. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide compositions, and the use of such compositions for protective coatings, particularly of electronic devices. SOLUTION: The invention concerns fired-on-foil ceramic capacitors coated with a composite encapsulant and embedded in a printed wiring board. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a capacitor device which has capacitance. SOLUTION: The capacitor device is provided with: a pair of conductive layers 214 and 224 which face each other; a first dielectric layer 226 which is formed on a surface of the first conductive layer 224 and has a first dielectric constant; and a second dielectric layer 230 which has a second dielectric constant and is sandwiched between the first conductive layers 214 and 224 through the first dielectric layer 226. The capacitance of the capacitor device is determinted by the dielectric constant and the thickness of the first dielectric layer 226, and the second dielectric constant and the thickness of the second dielectric layer 230. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a thin-film capacitor in which V BD can be raised while suppressing variation in capacity and thereby the device characteristics and the reliability of product can be enhanced. SOLUTION: Each electronic component 1-4 has a capacitor 11 formed on a smooth substrate 51 having a planarization layer 52 formed on the surface as a base material. The capacitor 11 has such a structure as a lower conductor 21 consisting of an underlying conductor 21a and a conductor 21b, a dielectric film 31 composed of alumina, a resin layer J1 principally composed of novolak based resin, a resin layer J2 principally composed of polyimide based resin, and an upper conductor 25 consisting of an underlying conductor 25a and a conductor 25b are formed on the planarization layer 52 of the substrate 51. The resin layer J1 has an opening K1 above the lower conductor 21 and the resin layer J2 has an opening K2 larger than the opening K1. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
Of an IC card, an IC is mounted on a surface of a circuit board (FPC) including a hard plate member that is attached on the other surface of the circuit board. Both surfaces of the circuit board having the IC and plate member are covered by a hard material member of electric insulating. Therefore, stress load applied to the IC can be restricted. Further, the circuit board along with the hard material member is divided into multiple portions that are connected using a flexible electric wiring. This can provide sufficient flexibility to the IC card, resulting in enhancement of a preventive effect in breakage or damage of the IC card.
Abstract:
An anisotropic conductive film includes hard portions at the two edges and a soft portion constituting the remainder. Due to such a construction, when a semiconductor chip is bonded to a substrate by thermocompression, the hard portions inhibit the soft portion from flowing toward the periphery of the semiconductor chip. Thereby, it is possible to prevent the anisotropic conductive film from adhering to a hot pressing tool.