Patents by Inventor Shigenobu Ishihara

Shigenobu Ishihara 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).

  • Patent number: 7358714
    Abstract: A testing method of a semiconductor integrated circuit device includes a testing step of conducting a functional test by supplying test pattern data to a semiconductor integrated circuit device mounted upon a testing apparatus, and a post processing step conducted after the testing step for continuously driving the semiconductor integrated circuit device by supplying dummy test pattern to the semiconductor integrated circuit device, wherein the test pattern data is supplied with a first system clock speed while the dummy test pattern data is supplied with a second, slower system clock speed, the post processing step switching a system clock speed of the testing apparatus from the first system clock speed to the second system clock speed at the same time as finishing of the testing step.
    Type: Grant
    Filed: January 19, 2006
    Date of Patent: April 15, 2008
    Assignee: Fujitsu Limited
    Inventors: Takao Watanabe, Shigenobu Ishihara
  • Patent number: 7256591
    Abstract: A probe card is used to test an electronic device. The probe card includes a base plate and a cantilever-type probe arranged on the base plate. The cantilever-type probe has an end that contacts the contacted body and moves when contacting the contacted body. A stopper arranged on the base plate restricts the movement of the cantilever-type probe.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: August 14, 2007
    Assignee: Fujitsu Limited
    Inventors: Tsutomu Tatematsu, Kenji Togashi, Tetsuhiro Nanbu, Shigenobu Ishihara, Morihiko Hamada, Yoshikazu Arisaka, Kunihiro Itagaki, Shigekazu Aoki
  • Publication number: 20070134824
    Abstract: A probe card that is manufactured inexpensively. The probe card includes a base plate, a flexible substrate, and a contact probe. The contact probe is a flexible substrate formed from polyimide resin. The contact probe has a plurality of parallel wires. Each wire has a distal end that functions as a contact. The contact probe is produced by cutting a general purpose substrate having a plurality of parallel wires formed at a predetermined pitch. The number of the parallel wires is equal to the number of pads of an LSI chip.
    Type: Application
    Filed: January 26, 2007
    Publication date: June 14, 2007
    Applicant: FUJITSU LIMITED
    Inventors: Yoshikazu Arisaka, Kunihiro Itagaki, Shigenobu Ishihara, Tomohiro Giga, Naoyoshi Kikuchi
  • Publication number: 20070091698
    Abstract: A testing method of a semiconductor integrated circuit device includes a testing step of conducting a functional test by supplying test pattern data to a semiconductor integrated circuit device mounted upon a testing apparatus, and a post processing step conducted after the testing step for continuously driving the semiconductor integrated circuit device by supplying dummy test pattern to the semiconductor integrated circuit device, wherein the test pattern data is supplied with a first system clock speed while the dummy test pattern data is supplied with a second, slower system clock speed, the post processing step switching a system clock speed of the testing apparatus from the first system clock speed to the second system clock speed at the same time as finishing of the testing step.
    Type: Application
    Filed: January 19, 2006
    Publication date: April 26, 2007
    Inventors: Takao Watanabe, Shigenobu Ishihara
  • Patent number: 7180312
    Abstract: A probe card that is manufactured inexpensively. The probe card includes a base plate, a flexible substrate, and a contact probe. The contact probe is a flexible substrate formed from polyimide resin. The contact probe has a plurality of parallel wires. Each wire has a distal end that functions as a contact. The contact probe is produced by cutting a general purpose substrate having a plurality of parallel wires formed at a predetermined pitch. The number of the parallel wires is equal to the number of pads of an LSI chip.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: February 20, 2007
    Assignee: Fujitsu Limited
    Inventors: Yoshikazu Arisaka, Kunihiro Itagaki, Shigenobu Ishihara, Tomohiro Giga, Naoyoshi Kikuchi
  • Publication number: 20030184330
    Abstract: A probe card that is manufactured inexpensively. The probe card includes a base plate, a flexible substrate, and a contact probe. The contact probe is a flexible substrate formed from polyimide resin. The contact probe has a plurality of parallel wires. Each wire has a distal end that functions as a contact. The contact probe is produced by cutting a general purpose substrate having a plurality of parallel wires formed at a predetermined pitch. The number of the parallel wires is equal to the number of pads of an LSI chip.
    Type: Application
    Filed: March 25, 2003
    Publication date: October 2, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Yoshikazu Arisaka, Kunihiro Itagaki, Shigenobu Ishihara, Tomohiro Giga, Naoyoshi Kikuchi
  • Publication number: 20030098701
    Abstract: An inexpensive probing card that has probe pins for contacting pads with high reliability. The probe pins are arranged on a base plate. The probe pins move along the pads when contacting the pads. A stopper restricts the movement of the probe pins.
    Type: Application
    Filed: October 31, 2002
    Publication date: May 29, 2003
    Applicant: Fujitsu Limited
    Inventors: Tsutomu Tatematsu, Kenji Togashi, Tetsuhiro Nanbu, Shigenobu Ishihara, Morihiko Hamada, Yoshikazu Arisaka, Kunihiro Itagaki, Shigekazu Aoki
  • Publication number: 20030098702
    Abstract: An inexpensive probing card that has probe pins for contacting pads with high reliability. The probe pins are arranged on a base plate. The probe pins move along the pads when contacting the pads. A stopper restricts the movement of the probe pins.
    Type: Application
    Filed: March 29, 2002
    Publication date: May 29, 2003
    Applicant: Fujitsu Limited
    Inventors: Tsutomu Tatematsu, Kenji Togashi, Tetsuhiro Nanbu, Shigenobu Ishihara, Morihiko Hamada, Yoshikazu Arisaka, Kunihiro Itagaki
  • Patent number: 4990386
    Abstract: An optical disk substrate is disclosed, which is molded from a terpolymer composed of (A) an aromatic vinyl monomer, (B) cyclohexylmaleimide, and (C) at least one compound selected from the group consisting of (meth)acrylonitrile, isobornyl (meth)acrylate and cyclohexyl (meth)acrylate, with the cyclohexyl maleimide being copolymerized in an amount of from 5 to 60 wt % of said terpolymer. The optical disk substrate exhibits high heat resistance, low water absorption and low birefringence.
    Type: Grant
    Filed: April 7, 1989
    Date of Patent: February 5, 1991
    Assignee: Showa Denko Kabushiki Kaishi
    Inventors: Junichiro Washiyama, Motoyuki Hirata, Tetsuo Yasuda, Shigenobu Ishihara
  • Patent number: 4380600
    Abstract: An aqueous dispersion having good stability and fluidity, and a process for production thereof. The aqueous dispersion is produced by polymerizing (a) a specified amount of an ethylenically unsaturated monomer capable of forming a water-soluble polymer in (b) a specified amount of an aqueous solution containing a water-soluble polymer while adjusting the weight ratio of (a) to (b) to from 1:5 to 5:1.
    Type: Grant
    Filed: May 15, 1981
    Date of Patent: April 19, 1983
    Assignee: Showa Denko K.K.
    Inventors: Yoshikazu Hosoda, Shigenobu Ishihara, Shoichi Kobayashi
  • Patent number: 3934056
    Abstract: Resin compositions of high adhesivity which comprise (A) ethylene-vinylacetate copolymer or mixture of said copolymer with polyethylene, (B) chlorinated or chlorosulfonated polyethylene, (C) unsaturated carboxylic acids maintaining solid at room temperature and (D) organic peroxides or these components blended with phenolic compounds and/or acid-acceptors.
    Type: Grant
    Filed: November 26, 1974
    Date of Patent: January 20, 1976
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Masaharu Yoshida, Shigenobu Ishihara, Tsuyoshi Takahashi, Hiroki Imakura