Patents by Inventor Takaaki Hioka

Takaaki Hioka 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: 9523745
    Abstract: Provided are a magnetic sensor and a method of manufacturing the same capable of arranging a magnetic converging plate on a substrate on which Hall elements and a circuit are formed, with a small variation in position while suppressing an increase in number of work processes, the magnetic converging plate having high magnetic permeability and low coercive force. In the magnetic sensor and the method of manufacturing the same, in forming Hall elements and a circuit on a silicon substrate, a magnetic converging plate holder having a pattern recessed to have the same shape and size as those of a magnetic converging plate is formed, and, into the magnetic converging plate holder, the magnetic converging plate manufactured through processes different from those of the silicon substrate on which the Hall elements and the circuit are formed is inserted.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: December 20, 2016
    Assignee: SII Semiconductor Corporation
    Inventors: Takaaki Hioka, Mika Ebihara
  • Publication number: 20160254441
    Abstract: Provided are a magnetic sensor and a method of manufacturing the same. In the magnetic sensor and the method of manufacturing the same, a magnetic converging plate holder with a recessed pattern having the same shape and size as those of a magnetic converging plate is formed in a die pad of a package on which a semiconductor substrate having Hall elements, a circuit, and the like is to be arranged, the magnetic converging plate manufactured through processes different from those of the semiconductor substrate on which the Hall elements and the circuit are formed is inserted into the magnetic converging plate holder, and the semiconductor substrate having the Hall elements, the circuit, and the like is arranged on the resultant so that a back surface thereof faces the die pad and the magnetic converging plate.
    Type: Application
    Filed: February 23, 2016
    Publication date: September 1, 2016
    Inventors: Takaaki HIOKA, Mika EBIHARA
  • Publication number: 20160245881
    Abstract: Provided are a magnetic sensor and a method of manufacturing the same capable of arranging a magnetic converging plate on a substrate on which Hall elements and a circuit are formed, with a small variation in position while suppressing an increase in number of work processes, the magnetic converging plate having high magnetic permeability and low coercive force. In the magnetic sensor and the method of manufacturing the same, in forming Hall elements and a circuit on a silicon substrate, a magnetic converging plate holder having a pattern recessed to have the same shape and size as those of a magnetic converging plate is formed, and, into the magnetic converging plate holder, the magnetic converging plate manufactured through processes different from those of the silicon substrate on which the Hall elements and the circuit are formed is inserted.
    Type: Application
    Filed: February 10, 2016
    Publication date: August 25, 2016
    Inventors: Takaaki HIOKA, Mika EBIHARA
  • Publication number: 20160209480
    Abstract: Provided is a Hall element integrated on a single substrate capable of cancelling offset voltage with a spinning switch configured to switch spinning current and capable of simultaneously detecting a horizontal direction magnetic field and a vertical direction magnetic field. The Hall element has a four-fold rotational axis and includes: a P-type semiconductor substrate layer (100) formed of P-type silicon; a vertical magnetic field detection N-type doped region (110) formed on the P-type semiconductor substrate layer; and eight horizontal magnetic field detection N-type doped regions (120, 121) formed so as to surround the vertical magnetic field detection N-type doped region.
    Type: Application
    Filed: January 18, 2016
    Publication date: July 21, 2016
    Inventors: Takaaki HIOKA, Mika EBIHARA
  • Publication number: 20160154066
    Abstract: In a Hall sensor in which a Hall element and elements serving as heat sources out of components of a circuit for driving the Hall element are arranged close to each other on a silicon substrate, two directions of control currents by spinning current for the Hall element are selected in a vector manner based on signals from temperature sensors arranged close to a periphery of the Hall element, thereby enabling the elimination of a magnetic offset caused by heat generation of the heat sources.
    Type: Application
    Filed: November 17, 2015
    Publication date: June 2, 2016
    Inventors: Takaaki HIOKA, Masaru AKINO
  • Publication number: 20160146906
    Abstract: Provided is a highly sensitive vertical Hall element without increasing a chip area. In the vertical Hall element, trenches each filled with an insulating film are formed between a first current supply end and voltage output ends, respectively, which enables the restriction of current flow into the voltage output ends to increase the ratio of a current component perpendicular to a substrate surface, resulting in enhanced sensitivity.
    Type: Application
    Filed: November 17, 2015
    Publication date: May 26, 2016
    Inventors: Satoshi SUZUKI, Mika EBIHARA, Takaaki HIOKA
  • Patent number: 8466526
    Abstract: A Hall sensor has a P-type semiconductor substrate and a Hall sensing portion having a square shape and an N-type conductivity disposed on a surface of the semiconductor substrate. The Hall sensor includes Hall voltage output terminals having the same shape with each other, and control current input terminals having the same shape with each other. The Hall voltage output terminals are disposed at respective ones of four vertices of the Hall sensing portion. The control current input terminals include pairs of control current input terminals disposed at respective ones of the four vertices of the Hall sensing portion and arranged on both sides of respective ones of the Hall voltage output terminals in spaced apart relation from the Hall voltage output terminals so as to prevent electrical connection between the control current input terminals and the Hall voltage output terminals.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: June 18, 2013
    Assignee: Seiko Instruments Inc.
    Inventors: Takaaki Hioka, Toshihiko Omi
  • Patent number: 8427140
    Abstract: Provided is a highly-sensitive Hall element capable of eliminating an offset voltage without increasing the chip size. The Hall element includes: a Hall sensing portion having a shape of a cross and four convex portions; Hall voltage output terminals which are arranged at the centers of the front edges of the four convex portions, respectively; and control current input terminals which are arranged on side surfaces of each of the convex portions independently of the Hall voltage output terminals. In this case, the Hall voltage output terminal has a small width and the control current input terminal has a large width.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: April 23, 2013
    Assignee: Seiko Instruments Inc.
    Inventors: Takaaki Hioka, Toshihiko Omi
  • Publication number: 20120001280
    Abstract: Provided is a highly-sensitive Hall element capable of eliminating an offset voltage without increasing the chip size. The Hall element includes: a Hall sensing portion having a shape of a cross and four convex portions; Hall voltage output terminals which are arranged at the centers of the front edges of the four convex portions, respectively; and control current input terminals which are arranged on side surfaces of each of the convex portions independently of the Hall voltage output terminals. In this case, the Hall voltage output terminal has a small width and the control current input terminal has a large width.
    Type: Application
    Filed: June 30, 2011
    Publication date: January 5, 2012
    Inventors: Takaaki Hioka, Toshihiko Omi
  • Publication number: 20120001279
    Abstract: Provided is a highly-sensitive Hall element capable of eliminating an offset voltage without increasing the chip size. At the four vertices of a square Hall sensing portion, Hall voltage output terminals and control current input terminals are respectively arranged independently from each other. The Hall voltage output terminals all have the same shape. The control current input terminals are arranged on both sides of the Hall voltage output terminals, respectively, to be spaced apart from the Hall voltage output terminals so as to prevent electrical connection to the Hall voltage output terminals, and have the same shape at the four vertices.
    Type: Application
    Filed: June 30, 2011
    Publication date: January 5, 2012
    Inventors: Takaaki Hioka, Toshihiko Omi