Patents by Inventor Masamitsu Ikumo

Masamitsu Ikumo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20050224970
    Abstract: A semiconductor device has antenna pads and a testing pad formed on the substrate. An insulating resin layer containing a filler covers the testing pad, and bumps are provided on the antenna pads. Specific data in the semiconductor device are inhibited from being read out or rewritten, by the provision of the insulating resin layer containing a filler.
    Type: Application
    Filed: August 24, 2004
    Publication date: October 13, 2005
    Inventors: Hirohisa Matsuki, Masamitsu Ikumo
  • Publication number: 20050140004
    Abstract: A semiconductor device includes a semiconductor substrate and an array of protruding electrodes arranged at a pitch X1. Each of the protruding electrodes has a height X3 and is formed on a barrier metal base of diameter X2 coupled to an electrode arranged on the semiconductor substrate so as to satisfy the relations (X1/2)?X2?(3*X1/4) and (X1/2)?X3?(3*X1/4).
    Type: Application
    Filed: November 23, 2004
    Publication date: June 30, 2005
    Inventors: Masahiko Ishiguri, Hirohisa Matsuki, Hiroyuki Yoda, Tadahiro Okamoto, Masamitsu Ikumo, Shuichi Chiba
  • Publication number: 20050074971
    Abstract: A group of wires that bonds the first semiconductor chip and the second semiconductor chip together and extends on the first semiconductor chip is formed of a single plated film through plating in one continuous process. The second semiconductor chip is then bonded onto the first semiconductor chip to complete a semiconductor package.
    Type: Application
    Filed: February 17, 2004
    Publication date: April 7, 2005
    Applicant: FUJITSU LIMITED
    Inventors: Masamitsu Ikumo, Hirohisa Matsuki
  • Patent number: 6836025
    Abstract: In a semiconductor device circuit formation surfaces of each of a plurality of semiconductor chips can be easily located at even level when the semiconductor chips are arranged side by side so that a process of forming rearrangement wiring is simplified. The semiconductor chips are mounted on a substrate via an adhesive layer in a two-dimensional arrangement. A resin layer is formed on the substrate and located around the semiconductor elements. The resin layer has the same thickness as a thickness of the semiconductor elements. An organic insulating layer is formed over a surface of the resin layer and circuit formation surfaces of the semiconductor elements. A rearrangement wiring layer is formed on the organic insulating layer and electrodes of the semiconductor chips. External connection terminals are electrically connected to the circuit formation surfaces of the semiconductor elements through wiring in the rearrangement wiring layer.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: December 28, 2004
    Assignee: Fujitsu Limited
    Inventors: Tetsuya Fujisawa, Hirohisa Matsuki, Osamu Igawa, Yoshitaka Aiba, Masamitsu Ikumo, Mitsutaka Sato
  • Patent number: 6784543
    Abstract: A structure in which a phosphorus-nickel layer, a rich phosphorus nickel layer that contains phosphorus or boron higher than this phosphorus-nickel layer, a nickel-tin ally layer, a tin-rich tin alloy layer, and a tin alloy solder layer are formed in sequence on an electrode. Accordingly, adhesiveness between a metal pattern used as the electrode, the wiring, or the pad and the solder can be improved.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: August 31, 2004
    Assignee: Fujitsu Limited
    Inventors: Hirohisa Matsuki, Yutaka Makino, Masamitsu Ikumo, Mitsutaka Sato, Tetsuya Fujisawa, Yoshitaka Aiba
  • Patent number: 6734042
    Abstract: A group of wires that bonds the first semiconductor chip and the second semiconductor chip together and extends on the first semiconductor chip is formed of a single plated film through plating in one continuous process. The second semiconductor chip is then bonded onto the first semiconductor chip to complete a semiconductor package.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: May 11, 2004
    Assignee: Fujitsu Limited
    Inventors: Masamitsu Ikumo, Hirohisa Matsuki
  • Publication number: 20030227095
    Abstract: In a semiconductor device circuit formation surfaces of each of a plurality of semiconductor chips can be easily located at even level when the semiconductor chips are arranged side by side so that a process of forming rearrangement wiring is simplified. The semiconductor chips are mounted on a substrate via an adhesive layer in a two-dimensional arrangement. A resin layer is formed on the substrate and located around the semiconductor elements. The resin layer has the same thickness as a thickness of the semiconductor elements. An organic insulating layer is formed over a surface of the resin layer and circuit formation surfaces of the semiconductor elements. A rearrangement wiring layer is formed on the organic insulating layer and electrodes of the semiconductor chips. External connection terminals are electrically connected to the circuit formation surfaces of the semiconductor elements through wiring in the rearrangement wiring layer.
    Type: Application
    Filed: May 30, 2003
    Publication date: December 11, 2003
    Inventors: Tetsuya Fujisawa, Hirohisa Matsuki, Osamu Igawa, Yoshitaka Aiba, Masamitsu Ikumo, Mitsutaka Sato
  • Publication number: 20030162320
    Abstract: A group of wires that bonds the first semiconductor chip and the second semiconductor chip together and extends on the first semiconductor chip is formed of a single plated film through plating in one continuous process. The second semiconductor chip is then bonded onto the first semiconductor chip to complete a semiconductor package.
    Type: Application
    Filed: July 31, 2002
    Publication date: August 28, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Masamitsu Ikumo, Hirohisa Matsuki
  • Publication number: 20030151141
    Abstract: There is provided a structure in which a phosphorus-nickel layer, a rich phosphorus nickel layer that contains phosphorus or boron higher than this phosphorus-nickel layer, a nickel-tin ally layer, a tin-rich tin alloy layer, and a tin alloy solder layer are formed in sequence on an electrode. Accordingly, adhesiveness between a metal pattern used as the electrode, the wiring, or the pad and the solder can be improved.
    Type: Application
    Filed: February 28, 2003
    Publication date: August 14, 2003
    Applicant: Fujitsu Limited
    Inventors: Hirohisa Matsuki, Yutaka Makino, Masamitsu Ikumo, Mitsutaka Sato, Tetsuya Fujisawa, Yoshitaka Aiba
  • Patent number: 6600217
    Abstract: A mounting substrate and related mounting method for a semiconductor device. The mounting substrate includes a mounting area to which the semiconductor device is to be mounted and fixed by an adhesive, a peripheral channel formed in the mounting substrate so as to surround the mounting area, and radial channels extending radially from the center towards the periphery of the mounting area. An adhesive is applied at least to either the center of the mounting surface of the semiconductor device or the center of the mounting area of the mounting substrate. The semiconductor device is placed on the mounting area and the adhesive flows outwardly along the radial channels, with the adhesive then being cured. The peripheral channel provides control of the amount of adhesive which flows to the outside of the semiconductor device and the mounting area. The adhesive overflow can be adjusted such that adhesive climbs up the sides of the semiconductor device but not reach the upper surface of the device.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: July 29, 2003
    Assignee: Fujitsu Limited
    Inventors: Masanori Onodera, Shinsuke Nakajyo, Masamitsu Ikumo
  • Patent number: 6548898
    Abstract: A structure in which a phosphorus-nickel layer, a rich phosphorus nickel layer that contains phosphorus or boron higher than this phosphorus-nickel layer, a nickel-tin ally layer, a tin-rich tin alloy layer, and a tin alloy solder layer are formed in sequence on an electrode. Accordingly, adhesiveness between a metal pattern used as the electrode, the wiring, or the pad and the solder can be improved.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: April 15, 2003
    Assignee: Fujitsu Limited
    Inventors: Hirohisa Matsuki, Yutaka Makino, Masamitsu Ikumo, Mitsutaka Sato, Tetsuya Fujisawa, Yoshitaka Aiba
  • Patent number: 6515347
    Abstract: A wafer level semiconductor device including a wafer having a plurality of semiconductor elements formed on an upper surface thereof, a sealing resin including a first part for sealing the upper surface of the wafer and a second part for sealing a side surface of wafer, the second part having a lower edge surface flush with a lower surface of the wafer, and a film for covering the lower surface of wafer and the lower edge surface of the second part of the sealing resin and conducting the process using the wafer level semiconductor device in which the film is bonded. This structure prevents warping of the wafer level semiconductor device after the sealing resin is formed on the device and it is then taken out from the mold dies.
    Type: Grant
    Filed: June 7, 2000
    Date of Patent: February 4, 2003
    Assignee: Fujitsu Limited
    Inventors: Yasuhiro Shinma, Norio Fukasawa, Takashi Hozumi, Toshimi Kawashara, Masamitsu Ikumo
  • Publication number: 20020121709
    Abstract: There is provided a structure in which a phosphorus—nickel layer, a rich phosphorus nickel layer that contains phosphorus or boron higher than this phosphorus—nickel layer, a nickel—tin ally layer, a tin-rich tin alloy layer, and a tin alloy solder layer are formed in sequence on an electrode. Accordingly, adhesiveness between a metal pattern used as the electrode, the wiring, or the pad and the solder can be improved.
    Type: Application
    Filed: July 2, 2001
    Publication date: September 5, 2002
    Applicant: Fujitsu Limited
    Inventors: Hirohisa Matsuki, Yutaka Makino, Masamitsu Ikumo, Mitsutaka Sato, Tetsuya Fujisawa, Yoshitaka Aiba
  • Patent number: 6437432
    Abstract: A semiconductor device is provided, which device includes a semiconductor substrate including a plurality of signal pads and ground pads, an insulating film formed on the semiconductor substrate, a conductive metal film formed on the insulating film and electrically connected to the ground pads and a plurality of first interconnection lines electrically connected to the signal pads and insulated from the conductive metal film. The conductive metal film is formed over a region including the first interconnection lines in a plan view of the semiconductor device.
    Type: Grant
    Filed: December 26, 2000
    Date of Patent: August 20, 2002
    Assignee: Fujitsu Limited
    Inventors: Masamitsu Ikumo, Toshimi Kawahara, Norio Fukasawa, Kenichi Nagashige
  • Patent number: 6420213
    Abstract: A number of processes and the cost for mounting the semiconductor device are reduced by reducing the number of kinds of adhesives necessary for mounting the semiconductor device having a plurality of stud bumps to a mounting substrate. An electrically non-conductive adhesive is applied to a planer surface of a hard material member. The semiconductor device is attached to a bonding head. The stud bumps of the semiconductor device are leveled by being pressed against the planer surface of the hard material member by the bonding head. A predetermined amount of the electrically non-conductive adhesive can be applied to a mounting area of the semiconductor device by separating the semiconductor device from the planer surface of the hard material member. The semiconductor device is fixed to the mounting substrate by placing the semiconductor device on the mounting substrate and curing the electrically non-conductive adhesive on the mounting surface of the semiconductor device.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: July 16, 2002
    Assignee: Fujitsu Limited
    Inventors: Shinsuke Nakajyo, Masanori Onodera, Masamitsu Ikumo
  • Publication number: 20010023981
    Abstract: A semiconductor device is provided, which device includes a semiconductor substrate including a plurality of signal pads and ground pads, an insulating film formed on the semiconductor substrate, a conductive metal film formed on the insulating film and electrically connected to the ground pads and a plurality of first interconnection lines electrically connected to the signal pads and insulated from the conductive metal film. The conductive metal film is formed over a region including the first interconnection lines in a plan view of the semiconductor device.
    Type: Application
    Filed: December 26, 2000
    Publication date: September 27, 2001
    Inventors: Masamitsu Ikumo, Toshimi Kawahara, Norio Fukasawa, Kenichi Nagashige
  • Publication number: 20010013641
    Abstract: A mounting substrate and related mounting method for a semiconductor device. The mounting substrate includes a mounting area to which the semiconductor device is to be mounted and fixed by an adhesive, a peripheral channel formed in the mounting substrate so as to surround the mounting area, and radial channels extending radially from the center towards the periphery of the mounting area. An adhesive is applied at least to either the center of the mounting surface of the semiconductor device or the center of the mounting area of the mounting substrate. The semiconductor device is placed on the mounting area and the adhesive flows outwardly along the radial channels, with the adhesive then being cured. The peripheral channel provides control of the amount of adhesive which flows to the outside of the semiconductor device and the mounting area. The adhesive overflow can be adjusted such that adhesive climbs up the sides of the semiconductor device but not reach the upper surface of the device.
    Type: Application
    Filed: December 8, 2000
    Publication date: August 16, 2001
    Inventors: Masanori Onodera, Shinsuke Nakajyo, Masamitsu Ikumo