Patents by Inventor Yuji Shigesawa

Yuji Shigesawa 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: 9869715
    Abstract: The present invention provides a semiconductor wafer inspection apparatus and a semiconductor wafer inspection method that can suppress warpage in a semiconductor wafer due to a temperature difference between the mounting surface of a table and the semiconductor wafer. In a prober of the present invention, a semiconductor wafer is heated to have a second temperature which is equal to or lower than a first temperature in a preheating step using an oven, and then the semiconductor wafer is placed on a mounting surface of a table which is heated to the first temperature. Thus, because a temperature difference between the mounting surface of the table and the semiconductor wafer is reduced in the prober, it is possible to suppress warpage in the semiconductor wafer that occurs right after the semiconductor wafer is placed on the mounting surface.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: January 16, 2018
    Assignee: TOKYO SEIMITSU CO., LTD.
    Inventors: Takashi Ishimoto, Yuji Shigesawa, Akira Yamaguchi, Takashi Motoyama, Takenori Takahashi
  • Publication number: 20170010323
    Abstract: The present invention provides a semiconductor wafer inspection apparatus and a semiconductor wafer inspection method that can suppress warpage in a semiconductor wafer due to a temperature difference between the mounting surface of a table and the semiconductor wafer. In a prober of the present invention, a semiconductor wafer is heated to have a second temperature which is equal to or lower than a first temperature in a preheating step using an oven, and then the semiconductor wafer is placed on a mounting surface of a table which is heated to the first temperature. Thus, because a temperature difference between the mounting surface of the table and the semiconductor wafer is reduced in the prober, it is possible to suppress warpage in the semiconductor wafer that occurs right after the semiconductor wafer is placed on the mounting surface.
    Type: Application
    Filed: August 12, 2016
    Publication date: January 12, 2017
    Inventors: Takashi ISHIMOTO, Yuji SHIGESAWA, Akira YAMAGUCHI, Takashi MOTOYAMA, Takenori TAKAHASHI
  • Patent number: 9519009
    Abstract: A prober includes: a wafer chuck having a conductive support surface; a movement rotation mechanism which moves and rotates the wafer chuck; a head stage which holds a probe holding portion; a stage member which has a conductive stage surface that is formed in parallel to the support surface and electrically connected with the support surface, and can move integrally with the wafer chuck; and a contactor which is fixed to a position facing the stage member and whose tip can electrically come into contact with the stage surface, wherein the stage member is separated from the wafer chuck as a separate body, and the stage surface and the support surface are electrically connected through a wiring member; and a back-surface electrode of a chip is electrically connected with a tester through the wafer chuck, a wiring, the stage member and the contactor.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: December 13, 2016
    Assignee: Tokyo Seimitsu Co., Ltd.
    Inventors: Konosuke Murakami, Toshiro Mori, Yuji Shigesawa, Kazuhisa Aoki, Akira Yamaguchi
  • Publication number: 20150137842
    Abstract: A prober includes: a wafer chuck having a conductive support surface; a movement rotation mechanism which moves and rotates the wafer chuck; a head stage which holds a probe holding portion; a stage member which has a conductive stage surface that is formed in parallel to the support surface and electrically connected with the support surface, and can move integrally with the wafer chuck; and a contactor which is fixed to a position facing the stage member and whose tip can electrically come into contact with the stage surface, wherein the stage member is separated from the wafer chuck as a separate body, and the stage surface and the support surface are electrically connected through a wiring member; and a back-surface electrode of a chip is electrically connected with a tester through the wafer chuck, a wiring, the stage member and the contactor.
    Type: Application
    Filed: November 20, 2014
    Publication date: May 21, 2015
    Inventors: Konosuke Murakami, Toshiro Mori, Yuji Shigesawa, Kazuhisa Aoki, Akira Yamaguchi