Patents by Inventor Katsuhiro IWAI

Katsuhiro IWAI 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: 20230253298
    Abstract: A semiconductor device includes a plurality of leads, a semiconductor element electrically connected to the leads and supported by one of the leads, and a sealing resin covering the semiconductor element and a part of each lead. The sealing resin includes a first edge, a second edge perpendicular to the first edge, and a center line parallel to the first edge. The reverse surfaces of the respective leads include parts exposed from the sealing resin, and the exposed parts include an outer reverse-surface mount portion and an inner reverse-surface mount portion that are disposed along the second edge of the sealing resin. The inner reverse-surface mount portion is closer to the center line of the sealing resin than is the outer reverse-surface mount portion. The outer reverse-surface mount portion is greater in area than the inner reverse-surface mount portion.
    Type: Application
    Filed: April 17, 2023
    Publication date: August 10, 2023
    Inventor: Katsuhiro IWAI
  • Patent number: 11658100
    Abstract: A semiconductor device includes a plurality of leads, a semiconductor element electrically connected to the leads and supported by one of the leads, and a sealing resin covering the semiconductor element and a part of each lead. The sealing resin includes a first edge, a second edge perpendicular to the first edge, and a center line parallel to the first edge. The reverse surfaces of the respective leads include parts exposed from the sealing resin, and the exposed parts include an outer reverse-surface mount portion and an inner reverse-surface mount portion that are disposed along the second edge of the sealing resin. The inner reverse-surface mount portion is closer to the center line of the sealing resin than is the outer reverse-surface mount portion. The outer reverse-surface mount portion is greater in area than the inner reverse-surface mount portion.
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: May 23, 2023
    Assignee: ROHM CO., LTD.
    Inventor: Katsuhiro Iwai
  • Publication number: 20210407893
    Abstract: A semiconductor device includes a plurality of leads, a semiconductor element electrically connected to the leads and supported by one of the leads, and a sealing resin covering the semiconductor element and a part of each lead. The sealing resin includes a first edge, a second edge perpendicular to the first edge, and a center line parallel to the first edge. The reverse surfaces of the respective leads include parts exposed from the sealing resin, and the exposed parts include an outer reverse-surface mount portion and an inner reverse-surface mount portion that are disposed along the second edge of the sealing resin. The inner reverse-surface mount portion is closer to the center line of the sealing resin than is the outer reverse-surface mount portion. The outer reverse-surface mount portion is greater in area than the inner reverse-surface mount portion.
    Type: Application
    Filed: September 10, 2021
    Publication date: December 30, 2021
    Inventor: Katsuhiro IWAI
  • Patent number: 11183444
    Abstract: A semiconductor device includes a plurality of leads, a semiconductor element electrically connected to the leads and supported by one of the leads, and a sealing resin covering the semiconductor element and a part of each lead. The sealing resin includes a first edge, a second edge perpendicular to the first edge, and a center line parallel to the first edge. The reverse surfaces of the respective leads include parts exposed from the sealing resin, and the exposed parts include an outer reverse-surface mount portion and an inner reverse-surface mount portion that are disposed along the second edge of the sealing resin. The inner reverse-surface mount portion is closer to the center line of the sealing resin than is the outer reverse-surface mount portion. The outer reverse-surface mount portion is greater in area than the inner reverse-surface mount portion.
    Type: Grant
    Filed: December 2, 2020
    Date of Patent: November 23, 2021
    Assignee: ROHM CO., LTD.
    Inventor: Katsuhiro Iwai
  • Patent number: 11037865
    Abstract: An aspect of the present disclosure provides a method of manufacturing a semiconductor device. The method includes preparing a lead frame. The lead frame includes a first lead including a pad and a first terminal. The pad includes a pad main surface and a pad back surface that face opposite sides to each other in a first direction. The first terminal extends from the pad along a second direction that is perpendicular to the first direction.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: June 15, 2021
    Assignee: ROHM CO., LTD.
    Inventors: Koshun Saito, Katsuhiro Iwai
  • Publication number: 20210090978
    Abstract: A semiconductor device includes a plurality of leads, a semiconductor element electrically connected to the leads and supported by one of the leads, and a sealing resin covering the semiconductor element and a part of each lead. The sealing resin includes a first edge, a second edge perpendicular to the first edge, and a center line parallel to the first edge. The reverse surfaces of the respective leads include parts exposed from the sealing resin, and the exposed parts include an outer reverse-surface mount portion and an inner reverse-surface mount portion that are disposed along the second edge of the sealing resin. The inner reverse-surface mount portion is closer to the center line of the sealing resin than is the outer reverse-surface mount portion. The outer reverse-surface mount portion is greater in area than the inner reverse-surface mount portion.
    Type: Application
    Filed: December 2, 2020
    Publication date: March 25, 2021
    Inventor: Katsuhiro IWAI
  • Patent number: 10886203
    Abstract: A semiconductor device includes a plurality of leads, a semiconductor element electrically connected to the leads and supported by one of the leads, and a sealing resin covering the semiconductor element and a part of each lead. The sealing resin includes a first edge, a second edge perpendicular to the first edge, and a center line parallel to the first edge. The reverse surfaces of the respective leads include parts exposed from the sealing resin, and the exposed parts include an outer reverse-surface mount portion and an inner reverse-surface mount portion that are disposed along the second edge of the sealing resin. The inner reverse-surface mount portion is closer to the center line of the sealing resin than is the outer reverse-surface mount portion. The outer reverse-surface mount portion is greater in area than the inner reverse-surface mount portion.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: January 5, 2021
    Assignee: ROHM CO., LTD.
    Inventor: Katsuhiro Iwai
  • Publication number: 20200203261
    Abstract: An aspect of the present disclosure provides a method of manufacturing a semiconductor device. The method includes preparing a lead frame. The lead frame includes a first lead including a pad and a first terminal. The pad includes a pad main surface and a pad back surface that face opposite sides to each other in a first direction. The first terminal extends from the pad along a second direction that is perpendicular to the first direction.
    Type: Application
    Filed: March 3, 2020
    Publication date: June 25, 2020
    Inventors: Koshun SAITO, Katsuhiro IWAI
  • Patent number: 10622285
    Abstract: An aspect of the present disclosure provides a method of manufacturing a semiconductor device. The method includes: preparing a first semiconductor element and a second semiconductor element, each of the first semiconductor element and the second semiconductor element having an element main surface and an element back surface that face opposite sides to each other; die bonding the element back surface of the first semiconductor element to a pad main surface by using a first solder; and die bonding the element back surface of the second semiconductor element to the pad main surface by using a second solder having a melting point lower than a melting point of the first solder, after die bonding the element back surface of the first semiconductor element to the pad main surface by using the first solder.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: April 14, 2020
    Assignee: ROHM CO., LTD.
    Inventors: Koshun Saito, Katsuhiro Iwai
  • Publication number: 20190139871
    Abstract: A semiconductor device includes a plurality of leads, a semiconductor element electrically connected to the leads and supported by one of the leads, and a sealing resin covering the semiconductor element and a part of each lead. The sealing resin includes a first edge, a second edge perpendicular to the first edge, and a center line parallel to the first edge. The reverse surfaces of the respective leads include parts exposed from the sealing resin, and the exposed parts include an outer reverse-surface mount portion and an inner reverse-surface mount portion that are disposed along the second edge of the sealing resin. The inner reverse-surface mount portion is closer to the center line of the sealing resin than is the outer reverse-surface mount portion. The outer reverse-surface mount portion is greater in area than the inner reverse-surface mount portion.
    Type: Application
    Filed: January 8, 2019
    Publication date: May 9, 2019
    Inventor: Katsuhiro IWAI
  • Patent number: 10211130
    Abstract: A semiconductor device includes a plurality of leads, a semiconductor element electrically connected to the leads and supported by one of the leads, and a sealing resin covering the semiconductor element and a part of each lead. The sealing resin includes a first edge, a second edge perpendicular to the first edge, and a center line parallel to the first edge. The reverse surfaces of the respective leads include parts exposed from the sealing resin, and the exposed parts include an outer reverse-surface mount portion and an inner reverse-surface mount portion that are disposed along the second edge of the sealing resin. The inner reverse-surface mount portion is closer to the center line of the sealing resin than is the outer reverse-surface mount portion. The outer reverse-surface mount portion is greater in area than the inner reverse-surface mount portion.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: February 19, 2019
    Assignee: ROHM CO., LTD.
    Inventor: Katsuhiro Iwai
  • Publication number: 20180012826
    Abstract: An aspect of the present disclosure provides a method of manufacturing a semiconductor device. The method includes: preparing a first semiconductor element and a second semiconductor element, each of the first semiconductor element and the second semiconductor element having an element main surface and an element back surface that face opposite sides to each other; die bonding the element back surface of the first semiconductor element to a pad main surface by using a first solder; and die bonding the element back surface of the second semiconductor element to the pad main surface by using a second solder having a melting point lower than a melting point of the first solder, after die bonding the element back surface of the first semiconductor element to the pad main surface by using the first solder.
    Type: Application
    Filed: July 6, 2017
    Publication date: January 11, 2018
    Inventors: Koshun SAITO, Katsuhiro IWAI
  • Publication number: 20170213782
    Abstract: A semiconductor device includes a plurality of leads, a semiconductor element electrically connected to the leads and supported by one of the leads, and a sealing resin covering the semiconductor element and a part of each lead. The sealing resin includes a first edge, a second edge perpendicular to the first edge, and a center line parallel to the first edge. The reverse surfaces of the respective leads include parts exposed from the sealing resin, and the exposed parts include an outer reverse-surface mount portion and an inner reverse-surface mount portion that are disposed along the second edge of the sealing resin. The inner reverse-surface mount portion is closer to the center line of the sealing resin than is the outer reverse-surface mount portion. The outer reverse-surface mount portion is greater in area than the inner reverse-surface mount portion.
    Type: Application
    Filed: January 26, 2017
    Publication date: July 27, 2017
    Inventor: Katsuhiro IWAI
  • Patent number: D796459
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: September 5, 2017
    Assignee: ROHM CO., LTD.
    Inventor: Katsuhiro Iwai
  • Patent number: D813537
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: March 27, 2018
    Assignee: MENICON CO., LTD.
    Inventors: Toshikazu Miura, Shota Nagao, Takashi Goto, Katsuhiro Iwai, Keisuke Yamamoto
  • Patent number: D899081
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: October 20, 2020
    Assignee: MENICON CO., LTD.
    Inventors: Keisuke Yamamoto, Katsuhiro Iwai, Akihiro Yasuda, Keiko Yamamoto, Takashi Goto