Patents by Inventor Torayuki Tsukada

Torayuki Tsukada 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: 9384876
    Abstract: A chip resistor includes a first electrode 1, a second electrode 2, a resistor portion 3, a first intermediate layer 4 connected to the first electrode 1 and the resistor portion 3, a second intermediate layer 5 connected to the second electrode 2 and the resistor portion 3, a coating film 61 covering the first electrode 1, and oxides existing in the first intermediate layer 4. The coating film 61 is made of a material having a higher absorptance of a laser beam of a predetermined wavelength than that of the material forming the first electrode 1. The oxides are oxides of the material forming the coating film 61.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: July 5, 2016
    Assignee: ROHM CO., LTD.
    Inventors: Torayuki Tsukada, Kentaro Naka
  • Patent number: 9343208
    Abstract: A method of manufacturing a chip resistor includes forming a resistor assembly in which a conductive member including portions separated from each other in a first direction is provided in a resistance body member; and dividing the resistor assembly into chip resistors, each including a chip-shaped resistance body formed by a part of the resistance body member, a pair of main electrodes formed by a part of the conductive member and separated from each other in the first direction, and a pair of sub-electrodes formed by a part of the conductive member, separated from each other in the first direction, and adjacent to the main electrodes in a second direction perpendicular to the first direction with concave portions recessed in the first direction interposed therebetween, by punching.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: May 17, 2016
    Assignee: Rohm Co., Ltd.
    Inventors: Torayuki Tsukada, Kentaro Naka
  • Publication number: 20150155081
    Abstract: A method of manufacturing a chip resistor includes forming a resistor assembly in which a conductive member including portions separated from each other in a first direction is provided in a resistance body member; and dividing the resistor assembly into chip resistors, each including a chip-shaped resistance body formed by a part of the resistance body member, a pair of main electrodes formed by a part of the conductive member and separated from each other in the first direction, and a pair of sub-electrodes formed by a part of the conductive member, separated from each other in the first direction, and adjacent to the main electrodes in a second direction perpendicular to the first direction with concave portions recessed in the first direction interposed therebetween, by punching.
    Type: Application
    Filed: February 6, 2015
    Publication date: June 4, 2015
    Inventors: Torayuki TSUKADA, Kentaro NAKA
  • Patent number: 8970340
    Abstract: A method of manufacturing a chip resistor includes forming a resistor assembly in which a conductive member including portions separated from each other in a first direction is provided in a resistance body member; and dividing the resistor assembly into chip resistors, each including a chip-shaped resistance body formed by a part of the resistance body member, a pair of main electrodes formed by a part of the conductive member and separated from each other in the first direction, and a pair of sub-electrodes formed by a part of the conductive member, separated from each other in the first direction, and adjacent to the main electrodes in a second direction perpendicular to the first direction with concave portions recessed in the first direction interposed therebetween, by punching.
    Type: Grant
    Filed: January 3, 2013
    Date of Patent: March 3, 2015
    Assignee: Rohm Co., Ltd.
    Inventors: Torayuki Tsukada, Kentaro Naka
  • Publication number: 20140247108
    Abstract: [Object] A chip resistor suitable for enhancing manufacturing efficiency is provided. [Means] A chip resistor includes a first electrode 1, a second electrode 2, a resistor portion 3, a first intermediate layer 4 connected to the first electrode 1 and the resistor portion 3, a second intermediate layer 5 connected to the second electrode 2 and the resistor portion 3, a coating film 61 covering the first electrode 1, and oxides existing in the first intermediate layer 4. The coating film 61 is made of a material having a higher absorptance of a laser beam of a predetermined wavelength than that of the material forming the first electrode 1. The oxides are oxides of the material forming the coating film 61.
    Type: Application
    Filed: October 12, 2012
    Publication date: September 4, 2014
    Applicant: ROHM CO., LTD
    Inventors: Torayuki Tsukada, Kentaro Naka
  • Patent number: 8111130
    Abstract: A chip resistor includes a resistor element, a reinforcing member, and a pair of electrodes. The resistor element includes a first surface and a second surface opposite to the first surface. The reinforcing member is bonded to the first surface of the resistor element. The pair of electrodes are formed on the second surface of the resistor element. The resistor element is formed with a slit located between the pair of electrodes.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: February 7, 2012
    Assignee: Rohm Co., Ltd.
    Inventor: Torayuki Tsukada
  • Patent number: 8081059
    Abstract: A chip resistor (A1) includes a chip-like resistor element (1), two electrodes (31) spaced from each other on the bottom surface (1a) of the resistor element, and an insulation film (21) between the two electrodes. Each electrode (31) has an overlapping portion (31c) which overlaps the insulation film (21) as viewed in the vertical direction.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: December 20, 2011
    Assignee: Rohm Co., Ltd.
    Inventors: Masanori Tanimura, Torayuki Tsukada, Kousaku Tanaka
  • Patent number: 8044765
    Abstract: A chip resistor includes a metal resistor element made in the form of a chip that includes an upper surface, a lower surface, two end surfaces, and two side surfaces. Two electrodes are formed on the resistor element to be spaced from each other in a longitudinal direction of the resistor element. Each of the electrodes is formed directly on the resistor element and extends continuously from the lower surface onto the upper surface via a corresponding one of the two end surfaces.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: October 25, 2011
    Assignee: Rohm Co., Ltd.
    Inventor: Torayuki Tsukada
  • Patent number: 7907046
    Abstract: The chip resistor (1) of the present invention includes an insulating substrate (2) in the form of a chip, a pair of terminal electrodes (3, 4) formed on both ends of the insulating substrate (2), a plurality of resistor films (5) formed on an obverse surface of the insulating substrate (2) in parallel with each other between the paired terminal electrodes (3, 4), and a cover coat formed on the obverse surface of the insulating substrate (2) to cover the resistor films (5). In the chip resistor (1), one of the terminal electrodes (3) includes individual upper electrodes (8) each formed on the obverse surface of the insulating substrate (3, 4) to be independently connected to a respective one of the resistor films (5) and a side electrode (9) formed on a side surface of the insulating substrate (2) to be connected to all the individual upper electrodes (8).
    Type: Grant
    Filed: September 4, 2006
    Date of Patent: March 15, 2011
    Assignee: Rohm Co., Ltd.
    Inventor: Torayuki Tsukada
  • Patent number: 7786842
    Abstract: The chip resistor (1) includes an insulating substrate (2) and a main upper electrode (4) formed on a main surface of the insulating substrate (2). On the main surface of the insulating substrate (2), a resistor film (5) including an end (5a) overlapping the upper surface of main upper electrode (4) is formed. The resistor film (5) is covered by a protective coat (7, 8). An auxiliary upper electrode (6) is formed on the upper surface of the main upper electrode (4). The auxiliary upper electrode (6) includes an inner end (6a) overlapping the upper surface of the end (5a) of the resistor film (5). The protective coat (7, 8) overlaps the inner end (6a) of the auxiliary upper electrode (6).
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: August 31, 2010
    Assignee: Rohm Co., Ltd.
    Inventors: Torayuki Tsukada, Masaki Yoneda
  • Patent number: 7782172
    Abstract: A variable chip resistor (1) of the present invention includes a resistor element (2) made of a metal plate which is in the form of a chip and has a predetermined specific resistance. Terminal electrodes (3, 4) for soldering are provided at both ends of the resistor element (2), and at least one adjustment hole (9) is formed in the resistor element (2) at a portion between the terminal electrodes (3, 4). An adjustment rod (10) is inserted into the adjustment hole (9) in close contact with the inner surface of the adjustment hole. The adjustment rod (10) is made of an electroconductive material, and its insertion depth is adjustable in the axial direction of the adjustment hole (9).
    Type: Grant
    Filed: September 4, 2006
    Date of Patent: August 24, 2010
    Assignee: Rohm Co., Ltd.
    Inventor: Torayuki Tsukada
  • Patent number: 7755468
    Abstract: A chip resistor includes a resistive element (1), an insulation layer (4) formed in a back surface of the flat surface, and two electrodes (3) spaced from each other via the insulation layer. Each electrode (3) makes contact with the insulation layer (4). Each electrode (3) has a lower surface formed with a solder layer (39).
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: July 13, 2010
    Assignee: Rohm Co., Ltd.
    Inventor: Torayuki Tsukada
  • Patent number: 7755467
    Abstract: The chip resistor (1) of the present invention includes a pair of terminal electrodes (4, 5) provided at ends of an insulating substrate (2) in the form of a chip, and a resistor film (3) formed on the upper surface of the insulating substrate (2) for electrical connection to the paired terminal electrodes (4, 5) and formed with a trimming groove (3a) for setting the resistance. The paired terminal electrodes (4, 5) include a lower electrode (4b) formed on the lower surface of the insulating substrate (2). The lower electrode (4b) extends up to a position directly below a narrower portion (8) of the resistor film (3) which has a relatively small width due to the formation of the trimming groove (3a) in the resistor film (3).
    Type: Grant
    Filed: August 2, 2006
    Date of Patent: July 13, 2010
    Assignee: Rohm Co., Ltd.
    Inventor: Torayuki Tsukada
  • Publication number: 20100117783
    Abstract: A chip resistor (A1) includes a chip-like resistor element (1), two electrodes (31) spaced from each other on the bottom surface (1a) of the resistor element, and an insulation film (21) between the two electrodes. Each electrode (31) has an overlapping portion (31c) which overlaps the insulation film (21) as viewed in the vertical direction.
    Type: Application
    Filed: January 25, 2010
    Publication date: May 13, 2010
    Applicant: ROHM CO., LTD.
    Inventors: Masanori TANIMURA, Torayuki Tsukada, Kousaku Tanaka
  • Patent number: 7667568
    Abstract: A chip resistor (A1) includes a chip-like resistor element (1), two electrodes (31) spaced from each other on the bottom surface (1a) of the resistor element, and an insulation film (21) between the two electrodes. Each electrode (31) has an overlapping portion (31c) which overlaps the insulation film (21) as viewed in the vertical direction.
    Type: Grant
    Filed: March 23, 2005
    Date of Patent: February 23, 2010
    Assignee: Rohm Co., Ltd.
    Inventors: Masanori Tanimura, Torayuki Tsukada, Kousaku Tanaka
  • Publication number: 20090284342
    Abstract: A chip resistor includes a resistor element, a reinforcing member, and a pair of electrodes. The resistor element includes a first surface and a second surface opposite to the first surface. The reinforcing member is bonded to the first surface of the resistor element. The pair of electrodes are formed on the second surface of the resistor element. The resistor element is formed with a slit located between the pair of electrodes.
    Type: Application
    Filed: May 13, 2009
    Publication date: November 19, 2009
    Applicant: ROHM CO., LTD.
    Inventor: Torayuki TSUKADA
  • Patent number: 7612429
    Abstract: A chip resistor (A1) comprises a first insulation layer (2A) covering the regions between a plurality of electrodes (3) on a rear surface (10a) of a resistor (1), and a second insulation layer covering a pair of side faces of the resistor (1). Inadvertent adhesion of solder to an improper part of the resistor (1) can thereby be eliminated. A solder layer (4) is preferably formed on a pair of end faces (10d) of the resistor (1). In so doing, a solder fillet can be formed appropriately.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: November 3, 2009
    Assignee: Rohm Co., Ltd.
    Inventors: Torayuki Tsukada, Tadatoshi Miwa
  • Publication number: 20090160602
    Abstract: The chip resistor (1) of the present invention includes a pair of terminal electrodes (4, 5) provided at ends of an insulating substrate (2) in the form of a chip, and a resistor film (3) formed on the upper surface of the insulating substrate (2) for electrical connection to the paired terminal electrodes (4, 5) and formed with a trimming groove (3a) for setting the resistance. The paired terminal electrodes (4, 5) include a lower electrode (4b) formed on the lower surface of the insulating substrate (2). The lower electrode (4b) extends up to a position directly below a narrower portion (8) of the resistor film (3) which has a relatively small width due to the formation of the trimming groove (3a) in the resistor film (3).
    Type: Application
    Filed: August 2, 2006
    Publication date: June 25, 2009
    Applicant: ROHM CO., LTD.
    Inventor: Torayuki Tsukada
  • Publication number: 20090153287
    Abstract: A chip resistor includes a metal resistor element made in the form of a chip that includes an upper surface, a lower surface, two end surfaces, and two side surfaces. Two electrodes are formed on the resistor element to be spaced from each other in a longitudinal direction of the resistor element. Each of the electrodes is formed directly on the resistor element and extends continuously from the lower surface onto the upper surface via a corresponding one of the two end surfaces.
    Type: Application
    Filed: December 4, 2008
    Publication date: June 18, 2009
    Applicant: ROHM CO., LTD.
    Inventor: Torayuki TSUKADA
  • Publication number: 20090115568
    Abstract: The chip resistor (1) of the present invention includes an insulating substrate (2) in the form of a chip, a pair of terminal electrodes (3, 4) formed on both ends of the insulating substrate (2), a plurality of resistor films (5) formed on an obverse surface of the insulating substrate (2) in parallel with each other between the paired terminal electrodes (3, 4), and a cover coat formed on the obverse surface of the insulating substrate (2) to cover the resistor films (5). In the chip resistor (1), one of the terminal electrodes (3) includes individual upper electrodes (8) each formed on the obverse surface of the insulating substrate (3, 4) to be independently connected to a respective one of the resistor films (5) and a side electrode (9) formed on a side surface of the insulating substrate (2) to be connected to all the individual upper electrodes (8).
    Type: Application
    Filed: September 4, 2006
    Publication date: May 7, 2009
    Applicant: ROHM CO., LTD.
    Inventor: Torayuki Tsukada