Patents by Inventor Hisayuki Yazawa

Hisayuki Yazawa 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: 20200393318
    Abstract: A pressure sensor includes a pressure detection element; a substrate on which the pressure detection element is mounted; and a cap in a tubular shape, the cap being attached to the attachment surface of the substrate with an adhesive, the attachment surface enclosing the periphery of the pressure detection element. An attracting concave part is in the end face of the cap, the end face facing the attachment surface, so as to have an inclined surface the distance of which from the attachment surface is increased in a direction from the outer circumferential surface of the cap toward its inner circumferential surface. Part of the adhesive is embedded in the interior of the attracting concave part.
    Type: Application
    Filed: August 27, 2020
    Publication date: December 17, 2020
    Inventors: Hisanobu Okawa, Hisayuki Yazawa
  • Patent number: 9612220
    Abstract: A humidity sensing portion is mounted in a gap between a first opposite member and a second opposite member. Metal joints and dummy joints are provided in the gap between the first opposite member and the second opposite member, and the two opposite members are fixed to each other through the metal joints and the dummy joints. Since only the metal joints and the dummy joints are present in the gap between the two opposite members, gas to be measured is easily introduced into the humidity sensing portion, and the sensing response to the humidity change is improved.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: April 4, 2017
    Assignee: ALPS ELECTRIC CO., LTD.
    Inventors: Hisayuki Yazawa, Shuji Yanagi, Atsushi Tondokoro, Hisanobu Okawa
  • Patent number: 9559030
    Abstract: An electronic component has a circuit board with a main surface, a chip having a sensor facing the main surface, bump electrodes disposed between the main surface and the chip so as to be placed inside of the edges of the chip in a plan view of the main surface, a dam provided between the main surface and the chip so as to extend at least from the edges of the chip to outer positions of the bump electrodes in a plan view of the main surface, and an under-fill material provided at least in a clearance between the dam and the chip. Between the main surface and the sensor, a space is formed in a region enclosed by the bump electrodes in a plan view of the main surface. The under-fill material is disposed outside of the space in a plan view of the main surface.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: January 31, 2017
    Assignee: ALPS ELECTRIC CO., LTD.
    Inventors: Hideki Gocho, Shuji Yanagi, Masaya Yamatani, Hisayuki Yazawa
  • Publication number: 20160284621
    Abstract: An electronic component has a circuit board with a main surface, a chip having a sensor facing the main surface, bump electrodes disposed between the main surface and the chip so as to be placed inside of the edges of the chip in a plan view of the main surface, a dam provided between the main surface and the chip so as to extend at least from the edges of the chip to outer positions of the bump electrodes in a plan view of the main surface, and an under-fill material provided at least in a clearance between the dam and the chip. Between the main surface and the sensor, a space is formed in a region enclosed by the bump electrodes in a plan view of the main surface. The under-fill material is disposed outside of the space in a plan view of the main surface.
    Type: Application
    Filed: March 14, 2016
    Publication date: September 29, 2016
    Inventors: Hideki GOCHO, Shuji YANAGI, Masaya YAMATANI, Hisayuki YAZAWA
  • Publication number: 20150355124
    Abstract: A humidity sensing portion is mounted in a gap between a first opposite member and a second opposite member. Metal joints and dummy joints are provided in the gap between the first opposite member and the second opposite member, and the two opposite members are fixed to each other through the metal joints and the dummy joints. Since only the metal joints and the dummy joints are present in the gap between the two opposite members, gas to be measured is easily introduced into the humidity sensing portion, and the sensing response to the humidity change is improved.
    Type: Application
    Filed: March 19, 2015
    Publication date: December 10, 2015
    Inventors: Hisayuki YAZAWA, Shuji YANAGI, Atsushi TONDOKORO, Hisanobu OKAWA
  • Publication number: 20150008544
    Abstract: A physical quantity sensor detects a physical quantity using a piezoresistive effect and includes a first-conductivity-type well layer disposed on a first insulating layer, a plurality of second-conductivity-type piezoresistive layers disposed on a surface side of the first-conductivity-type well layer, and a second-conductivity-type isolation layer disposed between the plurality of second-conductivity-type piezoresistive layers so as to pass through the first-conductivity-type well layer from a surface of the first-conductivity-type well layer to a surface of the first insulating layer.
    Type: Application
    Filed: July 2, 2014
    Publication date: January 8, 2015
    Inventors: Hisayuki YAZAWA, Katsuya KIKUIRI, Toru TAKAHASHI
  • Patent number: 8796789
    Abstract: A first sealing layer having a frame-like shape and a first contact layer are formed on a back surface of a frame portion of a sensor substrate. The first contact layer is separated from the first sealing layer, extends through a functional member and an insulation layer, and is electrically connected to the functional member and a first base member. A second sealing layer and a second contact layer are formed on a surface of a wiring substrate. The second sealing layer faces the first sealing layer. The second contact layer is separated from the second sealing layer, extends through the insulation layer, and is electrically connected to the second base member. The sealing layers are eutectically bonded to each other. The contact layers are electrically connected to each other, and thereby the first and second base members and the frame portion have the same potential.
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: August 5, 2014
    Assignee: Alps Electric Co., Ltd.
    Inventors: Yoshitaka Uto, Akira Miyatake, Toru Takahashi, Toshihiro Kobayashi, Chiaki Kera, Hisayuki Yazawa, Hisanobu Okawa
  • Patent number: 8459116
    Abstract: A physical quantity sensor includes an anchor portion, a movable portion displaceable in a height direction, a supporting portion rotatably connected to the anchor portion and the movable portion, and a detection portion. The supporting portion includes a first connection arm connecting the anchor portion and the movable portion to each other and a leg portion extending from the anchor portion in a direction opposite to the first connection arm, the leg portion being displaced in a direction opposite to a displacement direction of the movable portion when the supporting portion rotates. A stopper surface is disposed at a position to which a distal end portion of the leg portion is contactable when the leg portion is displaced in the direction opposite to the displacement direction of the movable portion. Displacement of the movable portion is restricted when the distal end portion of the leg portion contacts the stopper surface.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: June 11, 2013
    Assignee: Alps Electric Co., Ltd.
    Inventors: Akira Miyatake, Toru Takahashi, Hisanobu Ohkawa, Katsuya Kikuiri, Hisayuki Yazawa, Toshihiro Kobayashi, Yoshitaka Uto
  • Patent number: 8418557
    Abstract: A physical quantity sensor includes a support substrate, anchor portions fixed to a top surface of the support substrate, a movable portion positioned above the support substrate and supported by the anchor portions with support portions provided therebetween such that the movable portion is movable in a height direction, and detection portions for detecting a displacement of the movable portion. The support portions include beam portions provided between the movable portion and the anchor portions such that spring portions are provided between the beam portions and each of the movable portion and the anchor portions, the beam portions having a rigidity higher than a rigidity of the spring portions. The movable portion translates in the height direction owing to twisting of the spring portions and displacements in the height direction of distal ends of the beam portions, the movable portion being supported at the distal end.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: April 16, 2013
    Assignee: Alps Electric Co., Ltd.
    Inventors: Hisayuki Yazawa, Kiyoshi Sato, Katsuya Kikuiri, Toru Takahashi, Hisanobu Ohkawa
  • Publication number: 20120055249
    Abstract: A physical quantity sensor includes an anchor portion, a movable portion displaceable in a height direction, a supporting portion rotatably connected to the anchor portion and the movable portion, and a detection portion. The supporting portion includes a first connection arm connecting the anchor portion and the movable portion to each other and a leg portion extending from the anchor portion in a direction opposite to the first connection arm, the leg portion being displaced in a direction opposite to a displacement direction of the movable portion when the supporting portion rotates. A stopper surface is disposed at a position to which a distal end portion of the leg portion is contactable when the leg portion is displaced in the direction opposite to the displacement direction of the movable portion. Displacement of the movable portion is restricted when the distal end portion of the leg portion contacts the stopper surface.
    Type: Application
    Filed: November 15, 2011
    Publication date: March 8, 2012
    Applicant: ALPS ELECTRIC CO., LTD.
    Inventors: Akira MIYATAKE, Toru TAKAHASHI, Hisanobu OHKAWA, Katsuya KIKUIRI, Hisayuki YAZAWA, Toshihiro KOBAYASHI, Yoshitaka UTO
  • Patent number: 8125733
    Abstract: A perpendicular magnetic recording head includes a main magnetic pole layer; and a return yoke layer laminated on the main magnetic pole layer with a magnetic gap layer formed of a nonmagnetic material disposed on an opposing surface opposite a recording medium. The return yoke layer includes a first throat part opposing the main magnetic pole layer at a side close to the recording medium-opposing surface with a first gap spacing corresponding to a film thickness of the magnetic gap layer; and a second throat part extending to a deeper side than the first throat part in a height direction and opposing the main magnetic pole layer with a second gap spacing greater than the first gap spacing. A throat height determining layer is provided on the main magnetic pole layer or the magnetic gap layer, the throat height determining layer defining a dimension of the first throat part of the return yoke layer in the height direction and formed of an inorganic nonmagnetic material.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: February 28, 2012
    Assignee: TDK Corporation
    Inventors: Hisayuki Yazawa, Kiyoshi Kobayashi
  • Patent number: 8116033
    Abstract: To provide a thin-film magnetic head which suppresses PE while securing magnetic recording capability by controlling a domain of a leading end part of a main magnetic pole layer. The first flare part has a first flare angle smaller than a second flare angle of the second flare part. The second flare angle is smaller than 90°. The auxiliary yoke layer has a flare angle not smaller than the first flare angle but not greater than the second flare angle. The length h from the medium-opposing surface of the pole straight part to the end on the deeper side in the height direction of the first flare part satisfies the following conditional expression: h×Bs<0.000008 [m·T] where Bs is the saturated magnetic flux density of the main magnetic pole layer.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: February 14, 2012
    Assignee: TDK Corporation
    Inventors: Hiroshi Kameda, Hisayuki Yazawa
  • Patent number: 8085500
    Abstract: In a perpendicular magnetic recording head in which a magnetic pole part of a main magnetic pole layer exposed at a medium-opposing surface exhibits a trapezoidal form narrower on the leading edge side than on the trailing edge side, a pair of partial side shield layers made of a soft magnetic material are provided on both sides in the track width direction of the magnetic pole part of the main magnetic pole layer such as to be located more on the leading edge side of the magnetic pole part.
    Type: Grant
    Filed: April 22, 2008
    Date of Patent: December 27, 2011
    Assignee: TDK Corporation
    Inventors: Hisayuki Yazawa, Takahiro Taoka, Hiroshi Kameda
  • Patent number: 7990655
    Abstract: In a perpendicular magnetic recording head in which a magnetic pole part of a main magnetic pole layer exposed at a medium-opposing surface exhibits a trapezoidal form narrower at a leading edge than at a trailing edge on the return yoke layer side, a magnetic shield layer having a pair of side shield parts separated at the leading edge so as to oppose both side faces of the magnetic pole part and a bottom shield part magnetically connected to the pair of side shield parts and positioned below the leading edge of the magnetic pole part is provided on the leading edge side in the track width direction of the magnetic pole part of the main magnetic pole layer.
    Type: Grant
    Filed: April 22, 2008
    Date of Patent: August 2, 2011
    Assignee: TDK Corporation
    Inventors: Hisayuki Yazawa, Takahiro Taoka, Hiroshi Kameda
  • Patent number: 7990654
    Abstract: A perpendicular magnetic recording head includes a main magnetic pole layer and an auxiliary yoke layer that overlaps the main magnetic pole layer as viewed in a top view and is magnetically coupled to the main magnetic pole layer. The main magnetic pole layer includes a pole straight part exposed to an opposing surface opposite a recording medium, and a flared part that extends from the pole straight part in a height direction, the flared part broadening in a track width direction as the flared part extends in the height direction. The auxiliary yoke layer includes a flared part that extends from the recording medium-opposing surface, the flared part broadening in the track width direction as the flared part extends in the height direction. The flared part of the auxiliary yoke layer is disposed at a position located closer to the rear side in the height direction than the flared part of the main magnetic pole layer.
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: August 2, 2011
    Assignee: TDK Corporation
    Inventors: Hisayuki Yazawa, Takahiro Taoka, Hiroshi Kameda
  • Patent number: 7889457
    Abstract: There is provided a perpendicular magnetic recording head device which can increase magnetic field gradient to exhibit excellent recording performance while maintaining magnetic field intensity capable of performing information recording well. In a perpendicular magnetic recording head device composed of a main magnetic pole layer and a return path layer which are laminated with a nonmagnetic insulating layer therebetween, the return path layer has a two-layer structure composed of a low saturation magnetic flux density layer (low Bs layer), and a high saturation magnetic flux density layer (high Bs layer) formed an the low Bs layer and made of a material that has a relatively high saturation magnetic flux density. In a front end surface of the return path layer, the low Bs layer and the high Bs layer are exposed.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: February 15, 2011
    Assignee: TDK Corporation
    Inventors: Hisayuki Yazawa, Toshinori Watanabe
  • Publication number: 20100281980
    Abstract: A physical quantity sensor includes a support substrate, anchor portions fixed to a top surface of the support substrate, a movable portion positioned above the support substrate and supported by the anchor portions with support portions provided therebetween such that the movable portion is movable in a height direction, and detection portions for detecting a displacement of the movable portion. The support portions include beam portions provided between the movable portion and the anchor portions such that spring portions are provided between the beam portions and each of the movable portion and the anchor portions, the beam portions having a rigidity higher than a rigidity of the spring portions. The movable portion translates in the height direction owing to twisting of the spring portions and displacements in the height direction of distal ends of the beam portions, the movable portion being supported at the distal end.
    Type: Application
    Filed: July 22, 2010
    Publication date: November 11, 2010
    Inventors: Hisayuki Yazawa, Kiyoshi Sato, Katsuya Kikuiri, Toru Takahashi, Hisanobu Ohkawa
  • Patent number: 7692896
    Abstract: A perpendicular magnetic recording head includes a main pole layer and a return path layer that are exposed from a medium-facing surface of the recording head facing a recording medium and that face each other with a predetermined gap therebetween at the medium-facing surface. A coil layer applies a recording magnetic field to the main pole layer and the return path layer. The return path layer includes a gap adjusting layer and a main layer stacked in that order from a side facing the main pole layer. The gap adjusting layer is positioned so as to face the main pole layer and the recording medium, and is made of a magnetic material having a resistivity lower than resistivities of the main layer and the main pole layer.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: April 6, 2010
    Assignee: TDK Corporation
    Inventors: Hiroshi Kameda, Hisayuki Yazawa
  • Patent number: 7643246
    Abstract: A magnetic recording head and a method of manufacturing the magnetic recording head are provided. The perpendicular magnetic recording head includes a main magnetic pole layer and a return path layer that face each other with a gap therebetween in a lamination direction. A non-magnetic insulating layer is interposed between the main magnetic pole layer and the return path layer. At least one stepped portion is formed on a facing surface of at least one of the main magnetic pole layer and the return path layer.
    Type: Grant
    Filed: September 11, 2006
    Date of Patent: January 5, 2010
    Assignee: TDK Corporation
    Inventors: Hisayuki Yazawa, Toshinori Watanabe
  • Patent number: 7626784
    Abstract: A magnetic recording head is provided. The magnetic recording head comprises a main magnetic pole layer, a return path layer, and a coil layer. A facing surface faces a recording medium. A yoke layer is formed between the main magnetic pole layer and the return path layer. An extending front end portion is formed in the return path layer and the yoke layer is disposed inside the extending front end portion in a height direction. The main magnetic pole layer includes a front end and a rear end and the yoke layer is formed on the surface of the main magnetic pole layer to cover the base.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: December 1, 2009
    Assignee: TDK Corporation
    Inventor: Hisayuki Yazawa