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    • 9. 发明专利
    • SEMICONDUCTOR DEVICE
    • JP2001015633A
    • 2001-01-19
    • JP18307799
    • 1999-06-29
    • HITACHI LTD
    • KIKUCHI HIROSHIYOSHIDA IKUOSATO TOSHIHIKOSUMI YOSHIYUKI
    • H01L23/12H01L21/60
    • PROBLEM TO BE SOLVED: To elongate the lifetime of connections between electrode pads of a wiring substrate and electrode pads of a semiconductor chip by constituting the wiring substrate having electrode pads of a second group electrically connected to electrode pads of a first group with a main substrate material of a flexible film. SOLUTION: A wiring substrate 1 has a squared planar shape, and is mainly constituted by a flexible film 2 of polyimide-family insulator resin. A plurality of wires 3 are formed on a main surface 1A of the wiring substrate 1, and for the wires 3, electrode pads 3A of a first group are respectively formed. Also, a plurality of wires 5 are formed on the other main surface 1B of the wiring substrate 1, and for the wires 5, electrode pads 5A of a second group are respectively formed. With such arrangements, a semiconductor chip 10 is mounted on the main surface 1A side of the wiring substrate 1, and a plurality of conductive bumps 14 are arranged as external terminals on the other main surface 1B side of the wiring substrate 1.
    • 10. 发明专利
    • SEMICONDUCTOR PACKAGE
    • JPH10107173A
    • 1998-04-24
    • JP26160996
    • 1996-10-02
    • HITACHI LTD
    • DOI HIROAKIKOUNO MASAYAYASUKAWA AKIOSATO TOSHIHIKO
    • H01L23/12
    • PROBLEM TO BE SOLVED: To prevent a solder connection defect while the height of a solder bump is being maintained by a method wherein an elastic body is installed at the semiconductor package and the position of the elastic body in a deformed state is held by a spacer which is softened at the temperature of the melting point of higher of a solder electrode. SOLUTION: Solder electrodes 4 are connected to the rear surface of a ceramic package 3 in which a semiconductor element 1 is connected by solder pieces 2, a stainless steel plate 5 as an elastic body is brazed to the surface of the ceramic package 3, and the stainless steel plate 5 is elastically deformed upward by a high-melting-point solder piece 6 which is fixed and bonded to the surface of the ceramic package 3. Thereby, the gap at a mounting structure between the ceramic package 3 and the semiconductor element 1 is held properly, a soldering defect is not generated, a strain which is generated in a connecting solder piece owing to a substrate bend generated in a handling operation of owing to a temperature change is reduced, and it is possible to prevent the connecting solder piece from being broken down.