Alps Electric Co., Ltd.

Tdk Corporation

Alps Alpine Co., Ltd.

Alps Electronic Co., Ltd.

Alps Electric Company Co., Ltd.

Hisayuki Yazawa

Kiyoshi Kobayashi

Kiyoshi Sato

Hideki Gochou

Toru Takahashi

Yoshihiro Kanada

Toshinori Watanabe

Minoru Yamada

Hiroshi Kameda

Hisanobu Okawa

Akira Koyama

Naruaki Oki

Takahiro Taoka

Toshihiro Kobayashi

Katsuya Kikuiri

Mitsuo Kawasaki

Shuji Yanagi

Masahiko Ishizone

Akira Miyatake

Yoshitaka Uto

Hisanobu Ohkawa

Ayako Otsuka

Hiromi Ikegami, Legal Representative

Chiaki Ikegami, Legal Representative

Sumihito Morita

Naoki Sakatsume

Chiaki Kera

Masaya Yamatani

Masaki Ikegami

Atsushi Tondokoro

Mitsuhiro Gotoh

Hiroaki Nakajima

Tatsuru Ikarashi

Daisuke Tsuchiya

Shio Takahashi

Hideki Gocho

Hiromi Ikegami

By Chiaki Ikegami, Legal Represenative

A load sensor device includes a load sensor that has a pressure receiver, a housing that accommodates the load sensor, an elastic member that receives a load and presses against the load sensor, and a pressing member that is provided between the elastic member and the load sensor. The pressing member has a rigid presser capable of coming into contact with the pressure receiver, and an elastic supporter that supports the rigid presser on the housing. A gap is provided between the rigid presser and the pressure receiver in a state where the load is not applied to the elastic member. The elastic supporter elastically deforms to reduce the gap between the rigid presser and the pressure receiver when the load is applied to the elastic member. The load sensor device further includes a shock absorber capable of alleviating elastic deformation of the elastic supporter.

Load sensor device having shock absorber

A pressure sensor includes a diaphragm on a silicon substrate and a plurality of piezoelectric element areas that change in resistance according the distortion of the diaphragm. The plurality of piezoelectric element areas of the pressure sensor include a first piezoelectric element area, a second piezoelectric element area, a third piezoelectric element area, and a fourth piezoelectric element area. The diaphragm has a maximum deflection area whose stress becomes 80% or more of a maximum stress when distorted by a predetermined pressure. The first piezoelectric element area, the second piezoelectric element area, the third piezoelectric element area, and the fourth piezoelectric element area are disposed in the maximum deflection area.

Pressure sensor

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.

Pressure sensor having a cap being attached to the substrate surface with an adhesive

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.

Humidity sensing apparatus

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.

Electronic component and method of manufacturing the same

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.

Physical quantity sensor and method of making the same

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.

Physical quantity sensor

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.

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.

Perpendicular magnetic recording head and manufacturing method thereof

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&#xb0;. 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&#xd7;Bs&#x3c;0.000008 [m&#xb7;T] where Bs is the saturated magnetic flux density of the main magnetic pole layer.

Thin-film magnetic head with main magnetic pole layer and auxiliary yoke layer flare configurations

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.

Perpendicular magnetic recording head with partial side shield layers

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. The flared part of the main magnetic pole layer is formed at a flare angle greater than a flare angle of the auxiliary yoke layer.

Perpendicular magnetic recording head

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.

Perpendicular magnetic recording head having a bottom shield part magnetically connected to a pair of side shield parts

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.

Perpendicular magnetic recording head device capable of increasing magnetic field gradient to exhibit excellent recording performance while maintaining magnetic field intensity

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.

Growing community of inventors

Niigata-ken, Japan

Hisayuki Yazawa