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    • 31. 发明专利
    • SEMICONDUCTOR DEVICE
    • JPH09115956A
    • 1997-05-02
    • JP27221295
    • 1995-10-20
    • CITIZEN WATCH CO LTD
    • TERAJIMA KAZUHIKO
    • H01L21/60H01L23/12H01L23/36
    • PROBLEM TO BE SOLVED: To obtain a device with superb cooling property and less noise by providing a substrate electrode connected to each electrode of a chip to be mounted on the front of an insulation substrate, a ball terminal connected to a mother board on the rear, and an electrical path for leading the substrate electrode to the ball terminal and a member for guiding heat on the upper surface of a chip to a ball terminal. SOLUTION: A substrate electrode 3 and an insulation film 5 are provided on the front of a wiring insulation substrate 6, a pad electrode 4 and the insulation film 5 are provided on the rear, and further the front substrate electrode 3 and the rear pad electrode 4 are electrically connected via a through hole. Also, a cooling pattern 13 and a thermal core 2a are provided as heat conduction members for reaching from front to rear on the substrate 3. A chip 7 is mounted on the substrate 6, each electrode of an active element surface is guided to the substrate electrode 3, heat from an upper part is guided to the substrate 6 by a heat conduction board 12 and a heat conductive adhesive 9a, and each is guided to a mother board through a ball terminal 10 and a cooling terminal 10a, thus obtaining a device with improved cooling property and less noise.