Patents by Inventor Sigehisa Motowaki

Sigehisa Motowaki 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: 9177833
    Abstract: Conventional surface roughening plating technology cannot always improve the adhesion between a leadframe and a plating film and it depends on the material used for surface roughening plating. Conventional surface roughening technology by etching can only be used for leadframes made of limited materials. Improved adhesion cannot therefore be achieved between a metal member such as leadframe and a sealing resin. A manufacturing method of a semiconductor device according to one embodiment is to carry out resin sealing using a metal member such as leadframe which has been subjected to alloying treatment of a base material and Zn plated on the surface thereof.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: November 3, 2015
    Assignee: Renesas Electronics Corporation
    Inventors: Takuya Nakajo, Masaki Tamura, Yasushi Takahashi, Keiichi Okawa, Ryoichi Kajiwara, Sigehisa Motowaki, Hiroshi Hozouji
  • Patent number: 8632714
    Abstract: A mold and a pattern transfer method using the same for a nanoprinting technology. The mold can be released from a substrate accurately and easily. The mold, which is used for forming a fine pattern on a substrate using a press machine, comprises a release mechanism.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: January 21, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Masahiko Ogino, Akihiro Miyauchi, Sigehisa Motowaki, Kosuke Kuwabara
  • Publication number: 20130228907
    Abstract: Conventional surface roughening plating technology cannot always improve the adhesion between a leadframe and a plating film and it depends on the material used for surface roughening plating. Conventional surface roughening technology by etching can only be used for leadframes made of limited materials. Improved adhesion cannot therefore be achieved between a metal member such as leadframe and a sealing resin. A manufacturing method of a semiconductor device according to one embodiment is to carry out resin sealing using a metal member such as leadframe which has been subjected to alloying treatment of a base material and Zn plated on the surface thereof.
    Type: Application
    Filed: February 15, 2013
    Publication date: September 5, 2013
    Applicant: RENESAS ELECTRONICS CORPORATION
    Inventors: Takuya NAKAJO, Masaki TAMURA, Yasushi TAKAHASHI, Keiichi OKAWA, Ryoichi KAJIWARA, Sigehisa MOTOWAKI, Hiroshi HOZOUJI
  • Publication number: 20120256346
    Abstract: A mold and a pattern transfer method using the same for a nanoprinting technology. The mold can be released from a substrate accurately and easily. The mold, which is used for forming a fine pattern on a substrate using a press machine, comprises a release mechanism.
    Type: Application
    Filed: June 19, 2012
    Publication date: October 11, 2012
    Inventors: Masahiko Ogino, Akihiro Miyauchi, Sigehisa Motowaki, Kosuke Kuwabara
  • Patent number: 7374417
    Abstract: A stamper and a transfer apparatus that utilizes the stamper, which is capable of accurately transferring its own pattern onto an article, such as a substrate, without being affected by any distribution of convex portions on the stamper surface or any contour of the substrate. The stamper has a fine concave-convex pattern on a surface thereof for forming a fine structure on a substrate using a pressing machine. The stamper is flexible and includes a buffer formed on an opposite side to the side on which the concave-convex pattern is formed. The buffer has a longitudinal distribution of moduli of elasticity.
    Type: Grant
    Filed: March 18, 2004
    Date of Patent: May 20, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Kosuke Kuwabara, Akihiro Miyauchi, Masahiko Ogino, Sigehisa Motowaki
  • Publication number: 20040200368
    Abstract: A mold and a pattern transfer method using the same for a nanoprinting technology. The mold can be released from a substrate accurately and easily. The mold, which is used for forming a fine pattern on a substrate using a press machine, comprises a release mechanism.
    Type: Application
    Filed: March 18, 2004
    Publication date: October 14, 2004
    Inventors: Masahiko Ogino, Akihiro Miyauchi, Sigehisa Motowaki, Kosuke Kuwabara
  • Publication number: 20040191700
    Abstract: A stamper and a transfer apparatus that utilizes the stamper, which is capable of accurately transferring its own pattern onto an article, such as a substrate, without being affected by any distribution of convex portions on the stamper surface or any contour of the substrate. The stamper has a fine concave-convex pattern on a surface thereof for forming a fine structure on a substrate using a pressing machine. The stamper is flexible and includes a buffer formed on an opposite side to the side on which the concave-convex pattern is formed. The buffer has a longitudinal distribution of moduli of elasticity.
    Type: Application
    Filed: March 18, 2004
    Publication date: September 30, 2004
    Inventors: Kosuke Kuwabara, Akihiro Miyauchi, Masahiko Ogino, Sigehisa Motowaki
  • Publication number: 20040182602
    Abstract: The present invention aims at miniaturizing a balance-unbalance converter using the conventional connection lines and reducing the cost thereof. The present invention provides a high frequency electronic circuit component constituted by three transmission lines formed on at least the same surface, wherein the first and second transmission lines face each other on the same surface and are connected to each other electromagnetically, and the first and third transmission lines face each other on the same surface and are connected to each other electromagnetically.
    Type: Application
    Filed: March 9, 2004
    Publication date: September 23, 2004
    Inventors: Toshiya Satoh, Masahiko Ogino, Sigehisa Motowaki, Yuzuru Shimazaki, Yoko Furukawa