Patents by Inventor Keitaro ICHIKAWA

Keitaro ICHIKAWA 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: 20230335480
    Abstract: Provided are a power semiconductor device using a lead frame, in which deformation and bending of terminals is suppressed, insulation is secured between terminals, and mounting onto a control board is facilitated, and a manufacturing method thereof. A package in which a semiconductor element mounted on a lead frame is sealed, terminals being bent and exposed from side surfaces of the package, and, a terminal bending portion being a portion bent in each of the terminals, a width thereof being larger than a width of a tip of the terminal, and being equal to or smaller than the width of a contact portion of the terminal in contact with the package are provided; therefore, deformation and bending of the terminals is suppressed, a necessary insulation is secured between the adjacent terminals, and mounting onto a control board is facilitated.
    Type: Application
    Filed: June 21, 2023
    Publication date: October 19, 2023
    Applicant: Mitsubishi Electric Corporation
    Inventors: Keitaro ICHIKAWA, Taketoshi SHIKANO, Yuji SHIKASHO, Fumihito KAWAHARA
  • Patent number: 11735509
    Abstract: Provided are a power semiconductor device using a lead frame, in which deformation and bending of terminals is suppressed, insulation is secured between terminals, and mounting onto a control board is facilitated, and a manufacturing method thereof. A package in which a semiconductor element mounted on a lead frame is sealed, terminals being bent and exposed from side surfaces of the package, and, a terminal bending portion being a portion bent in each of the terminals, a width thereof being larger than a width of a tip of the terminal, and being equal to or smaller than the width of a contact portion of the terminal in contact with the package are provided; therefore, deformation and bending of the terminals is suppressed, a necessary insulation is secured between the adjacent terminals, and mounting onto a control board is facilitated.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: August 22, 2023
    Assignee: Mitsubishi Electric Corporation
    Inventors: Keitaro Ichikawa, Taketoshi Shikano, Yuji Shikasho, Fumihito Kawahara
  • Publication number: 20230238311
    Abstract: A semiconductor device includes a sealing resin being an insulating resin sealing the semiconductor element therein, and a plurality of electrode terminals each including a root portion being a root protruding from the sealing resin, a tip portion being a tip and portion extending from the root portion, and a middle portion provided between the tip portion and the root portion, and the middle portion includes first middle portions having a width wider than those of the root portion and the tip portion in the first direction, and a second middle portion having a width wider than those of the root portion and the tip portion in the first direction, a width narrower than those of the first middle portions in the first direction, and a bent portion bent toward in a third direction orthogonal to the first direction and the second direction.
    Type: Application
    Filed: November 23, 2022
    Publication date: July 27, 2023
    Applicant: Mitsubishi Electric Corporation
    Inventors: Keitaro ICHIKAWA, Yuji SHIKASHO, Takuya SAKAMOTO
  • Patent number: 11652032
    Abstract: Inner leads having die pads having upper surfaces to which semiconductor elements are mounted each have a stepped profile, and surfaces of portions of the inner leads are exposed from a sealing resin in plan view. Outer leads connected to the inner leads have first bends at side surfaces of the sealing resin to extend in a direction on a side of the upper surfaces of the die pads, so that a miniaturized semiconductor device can be obtained.
    Type: Grant
    Filed: May 25, 2021
    Date of Patent: May 16, 2023
    Assignee: Mitsubishi Electric Corporation
    Inventor: Keitaro Ichikawa
  • Patent number: 11335629
    Abstract: A transfer-mold type power module includes a plurality of electrode terminals that is arranged so as to protrude in the same direction from a target side surface of a package. A tie bar cutting residue protruding from a first side surface of each of the electrode terminals and a tie bar cutting residue protruding from a second side surface of each of the electrode terminals are different in position in a length direction of each of the electrode terminals. Each of the electrode terminals has a shape bent at a position including tie bar cutting residue closer to the package, with a width direction of each of the electrode terminals as an axis.
    Type: Grant
    Filed: November 17, 2020
    Date of Patent: May 17, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Fumihito Kawahara, Keitaro Ichikawa, Yuji Shikasho
  • Publication number: 20220108941
    Abstract: Inner leads having die pads having upper surfaces to which semiconductor elements are mounted each have a stepped profile, and surfaces of portions of the inner leads are exposed from a sealing resin in plan view. Outer leads connected to the inner leads have first bends at side surfaces of the sealing resin to extend in a direction on a side of the upper surfaces of the die pads, so that a miniaturized semiconductor device can be obtained.
    Type: Application
    Filed: May 25, 2021
    Publication date: April 7, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventor: Keitaro ICHIKAWA
  • Patent number: 11244836
    Abstract: A semiconductor apparatus according to the invention of the present application includes a base plate, a lead frame having a first surface and a second surface being a surface opposite to the first surface, the second surface being bonded to an upper surface of the base plate, a semiconductor device provided on the first surface of the lead frame, and a mold resin covering the upper surface of the base plate, the lead frame, and the semiconductor device, wherein the mold resin is provided with a terminal insertion hole that extends from the surface of the mold resin to the lead frame and in which a press-fit terminal is inserted, and the lead frame is provided with an opening portion which intercommunicates with the terminal insertion hole and into which the press-fit terminal is press-fitted.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: February 8, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventor: Keitaro Ichikawa
  • Publication number: 20210249341
    Abstract: A transfer-mold type power module includes a plurality of electrode terminals that is arranged so as to protrude in the same direction from a target side surface of a package. A tie bar cutting residue protruding from a first side surface of each of the electrode terminals and a tie bar cutting residue protruding from a second side surface of each of the electrode terminals are different in position in a length direction of each of the electrode terminals. Each of the electrode terminals has a shape bent at a position including tie bar cutting residue closer to the package, with a width direction of each of the electrode terminals as an axis.
    Type: Application
    Filed: November 17, 2020
    Publication date: August 12, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Fumihito KAWAHARA, Keitaro ICHIKAWA, Yuji SHIKASHO
  • Patent number: 10930523
    Abstract: It is an object of the present invention to provide a method for manufacturing a resin-sealed power semiconductor device that facilitates the separation of a suspension lead from a mold resin and a lead frame. A method for manufacturing a resin-sealed power semiconductor device according to the present invention includes the following steps: (a) sealing a semiconductor element and a lead frame, to prepare a sealed body in which a terminal lead and a suspension lead that are included in the lead frame project outward from a side of the mold resin; (b) punching a portion of the suspension lead, the portion projecting from the mold resin, with a first punch in a first direction, to separate the suspension lead from the mold resin; and (c) punching the projecting portion of the suspension lead with a second punch in a second direction.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: February 23, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Keitaro Ichikawa, Ken Sakamoto, Kazuo Funahashi
  • Publication number: 20200303215
    Abstract: A semiconductor apparatus according to the invention of the present application includes a base plate, a lead frame having a first surface and a second surface being a surface opposite to the first surface, the second surface being bonded to an upper surface of the base plate, a semiconductor device provided on the first surface of the lead frame, and a mold resin covering the upper surface of the base plate, the lead frame, and the semiconductor device, wherein the mold resin is provided with a terminal insertion hole that extends from the surface of the mold resin to the lead frame and in which a press-fit terminal is inserted, and the lead frame is provided with an opening portion which intercommunicates with the terminal insertion hole and into which the press-fit terminal is press-fitted.
    Type: Application
    Filed: June 21, 2017
    Publication date: September 24, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventor: Keitaro ICHIKAWA
  • Publication number: 20200303295
    Abstract: Provided are a power semiconductor device using a lead frame, in which deformation and bending of terminals is suppressed, insulation is secured between terminals, and mounting onto a control board is facilitated, and a manufacturing method thereof. A package in which a semiconductor element mounted on a lead frame is sealed, terminals being bent and exposed from side surfaces of the package, and, a terminal bending portion being a portion bent in each of the terminals, a width thereof being larger than a width of a tip of the terminal, and being equal to or smaller than the width of a contact portion of the terminal in contact with the package are provided; therefore, deformation and bending of the terminals is suppressed, a necessary insulation is secured between the adjacent terminals, and mounting onto a control board is facilitated.
    Type: Application
    Filed: January 9, 2020
    Publication date: September 24, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Keitaro ICHIKAWA, Taketoshi SHIKANO, Yuji SHIKASHO, Fumihito KAWAHARA
  • Publication number: 20190051539
    Abstract: It is an object of the present invention to provide a method for manufacturing a resin-sealed power semiconductor device that facilitates the separation of a suspension lead from a mold resin and a lead frame. A method for manufacturing a resin-sealed power semiconductor device according to the present invention includes the following steps: (a) sealing a semiconductor element and a lead frame, to prepare a sealed body in which a terminal lead and a suspension lead that are included in the lead frame project outward from a side of the mold resin; (b) punching a portion of the suspension lead, the portion projecting from the mold resin, with a first punch in a first direction, to separate the suspension lead from the mold resin; and (c) punching the projecting portion of the suspension lead with a second punch in a second direction.
    Type: Application
    Filed: March 29, 2016
    Publication date: February 14, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Keitaro ICHIKAWA, Ken SAKAMOTO, Kazuo FUNAHASHI
  • Patent number: 10074598
    Abstract: A lead frame includes a plurality of circuit patterns which each have a die pad and an electrode terminal portion and are disposed in a band shape, a tie bar, a frame portion and a suspension lead. Cut are a connection portion between electrode terminals and the frame portion, a connection portion between the frame portion and the tie bar at both end portions in a disposition direction of circuit patterns, and a connection portion from a connection part of the frame portion with the tie bar, between the circuit patterns to a part of the frame portion extending in the disposition direction. The electrode terminal portion is bent to extend to a direction of an upper surface of a semiconductor element. The lead frame is collectively resin-sealed while exposing the tie bar and the electrode terminal portion above the tie bar.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: September 11, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Ken Sakamoto, Tetsuya Ueda, Keitaro Ichikawa, Yuki Yoshioka
  • Publication number: 20170345742
    Abstract: A lead frame includes a plurality of circuit patterns which each have a die pad and an electrode terminal portion and are disposed in a band shape, a tie bar, a frame portion and a suspension lead. Cut are a connection portion between electrode terminals and the frame portion, a connection portion between the frame portion and the tie bar at both end portions in a disposition direction of circuit patterns, and a connection portion from a connection part of the frame portion with the tie bar, between the circuit patterns to a part of the frame portion extending in the disposition direction. The electrode terminal portion is bent to extend to a direction of an upper surface of a semiconductor element. The lead frame is collectively resin-sealed while exposing the tie bar and the electrode terminal portion above the tie bar.
    Type: Application
    Filed: December 15, 2016
    Publication date: November 30, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Ken SAKAMOTO, Tetsuya UEDA, Keitaro ICHIKAWA, Yuki YOSHIOKA
  • Patent number: 9627302
    Abstract: An object is to provide a technique in which a cost reduction in a power semiconductor device can be achieved while maintaining heat dissipation performance as much as possible. A power semiconductor device includes a leadframe, a power semiconductor element disposed on an upper surface of the leadframe, and an insulating layer disposed on a lower surface of the leadframe. At least a partial line of a peripheral line of a region where the insulating layer is disposed, on the lower surface, is aligned, in top view, with at least a partial line of an expanded peripheral line obtained by shifting outwardly, by the amount corresponding to the thickness of the leadframe, the peripheral line of the region where the power semiconductor element is disposed, on the upper surface.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: April 18, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Keitaro Ichikawa, Taketoshi Shikano
  • Publication number: 20160233151
    Abstract: An object is to provide a technique in which a cost reduction in a power semiconductor device can be achieved while maintaining heat dissipation performance as much as possible. A power semiconductor device includes a leadframe, a power semiconductor element disposed on an upper surface of the leadframe, and an insulating layer disposed on a lower surface of the leadframe. At least a partial line of a peripheral line of a region where the insulating layer is disposed, on the lower surface, is aligned, in top view, with at least a partial line of an expanded peripheral line obtained by shifting outwardly, by the amount corresponding to the thickness of the leadframe, the peripheral line of the region where the power semiconductor element is disposed, on the upper surface.
    Type: Application
    Filed: January 10, 2014
    Publication date: August 11, 2016
    Applicant: Mitsubishi Electric Corporation
    Inventors: Keitaro ICHIKAWA, Taketoshi SHIKANO