Patents Assigned to MARUISHI SANGYO CO., LTD.
  • Patent number: 11602819
    Abstract: A polishing method using a polishing pad including a specific adsorption layer. The polishing pad has an adsorption layer including a silicone including linear polyorganosiloxane having vinyl groups only at both ends, and the like. The polishing pad is fixed to a surface plate, and a product to be polished is pressed against the polishing pad, and simultaneously slid to polish the product to be polished. In this case, the surface roughness (Ra) of the surface plate is set to 0.01 to 0.7 ?m, and the adsorption layer of the polishing pad is then adsorbed and fixed to the surface plate to perform polishing work. By adjusting the surface roughness of the surface plate as described above, a surface of the product to be polished can be inhibited from being unpredictably scratched or roughened. The method for adjusting the surface roughness of the surface plate is preferably a method in which a film having a surface roughness as described above is bonded to a surface of the surface plate.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: March 14, 2023
    Assignee: MARUISHI SANGYO CO., LTD.
    Inventors: Toshiyasu Yajima, Daisuke Ninomiya
  • Publication number: 20220063052
    Abstract: The present invention relates to improvement of a surface plate to be used in a polishing apparatus, with a polishing pad to be attached on the surface plate. The surface plate of the present invention includes: a surface plate body; and a release layer including a release film or release paper formed on a surface of the surface plate body on which the polishing pad is to be attached. The release layer has a peel force of a surface thereof of 0.08 N/50 mm or more and 5.0 N/50 mm or less. The present invention can be suitably used in a polishing apparatus utilizing a general polishing pad including a pressure-sensitive adhesive. The present invention allows polishing pad fixing work and replacement work to be performed more easily than in a conventional technique.
    Type: Application
    Filed: March 2, 2020
    Publication date: March 3, 2022
    Applicant: MARUISHI SANGYO CO., LTD.
    Inventors: MATSUO IIDA, TOSHIYASU YAJIMA, DAISUKE NINOMIYA, SHIMPEI TATSUNO
  • Publication number: 20200147749
    Abstract: A polishing method using a polishing pad including a specific adsorption layer. The polishing pad has an adsorption layer including a silicone including linear polyorganosiloxane having vinyl groups only at both ends, and the like. The polishing pad is fixed to a surface plate, and a product to be polished is pressed against the polishing pad, and simultaneously slid to polish the product to be polished. In this case, the surface roughness (Ra) of the surface plate is set to 0.01 to 0.7 ?m, and the adsorption layer of the polishing pad is then adsorbed and fixed to the surface plate to perform polishing work. By adjusting the surface roughness of the surface plate as described above, a surface of the product to be polished can be inhibited from being unpredictably scratched or roughened. The method for adjusting the surface roughness of the surface plate is preferably a method in which a film having a surface roughness as described above is bonded to a surface of the surface plate.
    Type: Application
    Filed: June 1, 2018
    Publication date: May 14, 2020
    Applicant: MARUISHI SANGYO CO., LTD.
    Inventors: TOSHIYASU YAJIMA, DAISUKE NINOMIYA
  • Patent number: 10449653
    Abstract: The present invention is a holding pad including a holding layer for holding a member to be polished, in which the holding layer includes on a part of a surface thereof a template fixing portion for sticking a template for preventing lateral displacement of the member to be polished, the template fixing portion has on a surface thereof an adsorption layer for adsorbing and fixing the template the template fixing portion, and the adsorption layer is formed of a composition which is formed by crosslinking a silicone composed of a predetermined siloxane.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: October 22, 2019
    Assignee: MARUISHI SANGYO CO. LTD.
    Inventors: Toshiyasu Yajima, Daisuke Ninomiya
  • Publication number: 20170259397
    Abstract: The present invention is a holding pad including a holding layer for holding a member to be polished, in which the holding layer includes on a part of a surface thereof a template fixing portion for sticking a template for preventing lateral displacement of the member to be polished, the template fixing portion has on a surface thereof an adsorption layer for adsorbing and fixing the template the template fixing portion, and the adsorption layer is formed of a composition which is formed by crosslinking a silicone composed of a predetermined siloxane.
    Type: Application
    Filed: November 26, 2014
    Publication date: September 14, 2017
    Applicant: MARUISHI SANGYO CO., LTD.
    Inventors: TOSHIYASU YAJIMA, DAISUKE NINOMIYA
  • Patent number: 8430719
    Abstract: To provide a polishing pad (14) useful for polishing semiconductor materials having a high hardness. The polishing pad (14) is used for polishing a workpiece (16) in combination with loose grains and comprises a polishing surface (15) comprising a textile of high-tenacity organic fibers, the fiber has a tenacity of not lower than 15 cN/dtex. In the textile, the high-tenacity organic fiber may have a single fiber fineness within the range between 0.3 dtex and 15 dtex, or a total fineness of within the range between 3 dtex and 3,000 dtex. The fiber may include, for example, a fully-aromatic polyester fiber.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: April 30, 2013
    Assignees: Kuraray Co., Ltd., Maruishi Sangyo Co., Ltd.
    Inventors: Takashi Katayama, Tetsuya Watanabe, Yukio Goto, Shinya Kato, Toshiyasu Yajima
  • Publication number: 20120196515
    Abstract: To provide a polishing pad (14) useful for polishing semiconductor materials having a high hardness. The polishing pad (14) is used for polishing a workpiece (16) in combination with loose grains and comprises a polishing surface (15) comprising a textile of high-tenacity organic fibers, the fiber has a tenacity of not lower than 15 cN/dtex. In the textile, the high-tenacity organic fiber may have a single fiber fineness within the range between 0.3 dtex and 15 dtex, or a total fineness of within the range between 3 dtex and 3,000 dtex. The fiber may include, for example, a fully-aromatic polyester fiber.
    Type: Application
    Filed: April 11, 2012
    Publication date: August 2, 2012
    Applicants: MARUISHI SANGYO CO., LTD., KURARAY CO., LTD.
    Inventors: Takashi KATAYAMA, Tetsuya Watanabe, Yukio Goto, Shinya Kato, Toshiyasu Yajima