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Assignee: TDK Corporation


Location: JP
No. of patents: 97

1      
NumberTitleIssue Date
8085512CPP-type magnetoresistance effect element having a pair of free layers
A magnetic field detecting element comprises: a stack which includes first, second and third magnetic layers whose magnetization directions depend upon an external magnetic field, the second magnetic layer being positioned between the first magnetic layer and the th...
12/27/2011
8077436CPP-type magnetoresistance effect element having three magnetic layers
A magnetoresistance effect element comprises: a magnetoresistive stack including: first, second and third magnetic layers whose magnetization directions change in accordance with an external magnetic field, said second magnetic layer being located between said first...
12/13/2011
7955442Method for producing sintered magnet and alloy for sintered magnet
The present invention provides a method for producing a sintered magnet, which can have a sufficient sintered density even when the magnet has a low-R composition. The method is for producing a sintered magnet comprising R (R: one or more rare-earth elements), T (T:...
06/07/2011
7879469Ferrite magnet powder, sintered magnet, bond magnet, and magnetic recording medium
A ferrite magnet powder is represented by the composition formula AFe2+a(1-x)MaxFe3+bO27, wherein A represents at least one element selected from the group consisting of Sr, Ba, and Pb; and M represen...
02/01/2011
7436051Component for fabricating an electronic device and method of fabricating an electronic device
A component for fabricating the electronic device comprises a substrate and a conductive film provided on the substrate, in which the adhesion of the conductive film to the substrate is not greater than 0.1 N/cm. The adhesion of the conductive film to the substrate ...
10/14/2008
7378915Dielectric resonator oscillator and radar apparatus using the same
At least one of a rise time and a fall time of a dielectric resonator oscillator are reduced. The dielectric resonator oscillator includes a dielectric resonator, a drive circuit for applying a resonance voltage to the dielectric resonator, a switch for applying a v...
05/27/2008
7315870Memory controller, flash memory system, and method for recording data on flash memory
There is disclosed a controller included in a flash memory system attachable to a memory interface of a host system. If a block in which new data is written and a block in which old data is written are present simultaneously, the controller determines in which block...
01/01/2008
7298230Duplexer utilizing a compact splitter circuit
The duplexer includes a transmit filter connected between an antenna terminal and a transmit terminal, and a splitter circuit and a receive filter connected in series between the antenna terminal and the receive terminal. The splitter circuit includes at least one p...
11/20/2007
7281114Memory controller, flash memory system, and method of controlling operation for data exchange between host system and flash memory
There is disclosed a controller included in a flash memory system attachable to a memory interface of a host system. The controller performs a process for minimizing the maximum number of defective blocks to be classified into each zone, by using a plurality of repl...
10/09/2007
7239482Thin-film magnetic head and nonmagnetic body filled concave portion formed on a pole layer and magnetic storage apparatus using the same
A thin-film magnetic head is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern lay...
07/03/2007
7230794Thin-film magnetic head with nonmagnetic body filled concave portion formed on a pole layer and magnetic storage apparatus using the same
A thin-film magnetic head is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern lay...
06/12/2007
7205038Optical recording medium and method for manufacturing the same
A method for manufacturing an optical recording medium of the present invention includes the steps of forming an underlying layer having a brightness of 8 or more and a chroma of 4 or less on a label surface of a disk body by a spin coating process, and forming an i...
04/17/2007
7173361Film bulk acoustic wave resonator
A film bulk acoustic wave resonator of the invention includes a substrate; a resonant structure provided on the substrate constituted by a lower electrode, a piezoelectric film and an upper electrode; and an acoustic multilayer of a plurality of reflective films pro...
02/06/2007
7158391Switching power supply unit
A first side circuit connected to a primary coil of a transformer includes a main switching element driving the primary coil, and a control circuit which detects an output voltage to feedback and drives and controls the main switching element so as to keep constant ...
01/02/2007
7105880Electronic device and method of fabricating the same
The electronic device includes a substrate, a lower conductive film provided on the substrate, a functional film provided on the lower conductive film, and a crystallinity barrier film provided between the lower conductive film and the functional film. The present i...
09/12/2006
7106937Optical waveguide and method of fabricating the same
An optical waveguide comprises a silica substrate, a buffer layer formed on the silica substrate, cores formed on the buffer layer, and upper cladding layer formed on the buffer layer, covering the cores. The thermal expansion coefficients of the buffer layer and up...
09/12/2006
7082671Magnetic disc apparatus production method
A recording/reproduction element is mounted on a magnetic head slider via a piezoelectric element so that a displacement of the piezoelectric element performs fine control of the position of the recording/reproduction, thus enabling fine spacing and high track posit...
08/01/2006
7071795Film bulk acoustic wave resonator wafer and method of fabricating a film bulk acoustic wave resonator
A film bulk acoustic wave resonator wafer of the present invention prevents electric discharge from occurring in the process of fabricating a film bulk acoustic wave resonator, thereby enhancing product reliability and yield. The film bulk acoustic wave resonator wa...
07/04/2006
7052759Optical recording medium
An optical recording medium of the present invention includes a disk body and an ink-receiving layer disposed on a label surface of the disk body, wherein the ink-receiving layer has a brightness of 8 or more, a chroma of 4 or less, and an average surface rou...
05/30/2006
7054107Thin-film magnetic head with nonmagnetic body filled concave portion formed on a pole layer and magnetic storage apparatus using the same
To accurately decrease the gap depth between an upper pole layer and a lower pole layer and the front-end portion width of the upper pole layer. A thin-film magnetic head of the present invention is constituted by forming a lower shielding layer, a read gap l...
05/30/2006
7042090Electronic device and method of fabricating the same
An electronic device includes a substrate, a lower conductive film formed on the substrate and a functional film formed on the lower conductive film. In the present invention, an adhesion of the lower conductive film on the side of the substrate is greater than or e...
05/09/2006
7003182Embedded type optically irreversible circuit
An optical isolator having an optical element, comprised of an incoming side polarizer, a Faraday rotator, and an outgoing side polarizer superposed in the order of mention in the direction of an optical path, is embedded in the optical path of an optical fiber or o...
02/21/2006
6995497Film bulk acoustic resonator
A film bulk acoustic resonator of the present invention includes an upper electrode 104, a lower electrode 102, and a piezoelectric film 103 as well as an acoustic multilayer 120 that are provided between the upper electrode 104 an...
02/07/2006
6928722Magnetic disc apparatus and magnetic head in which a recording/reproduction element is mounted on a slider via a piezoelectric element
A recording/reproduction element is mounted on a magnetic head slider via a piezoelectric element so that a displacement of the piezoelectric element performs fine control of the position of the recording/reproduction, thus enabling fine spacing and high track posit...
08/16/2005
6781800Magnetoresistance effect film and device
A magnetic layer which is exchange-coupled to an antiferromagnetic layer and given an exchange bias therefrom is laminated via a non-magnetic layer on another magnetic layer to form an MR film. The antiferromagnetic layer (PtMn, PdMn or NiMn) is laminated on a groun...
08/24/2004
6597543Thin-film magnetic head and magnetic storage apparatus using the same
A thin-film magnetic head is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil ...
07/22/2003
6570744Magnetoresistance effect film and device
A magnetic layer which is exchange-coupled to an antiferromagnetic layer and given an exchange bias therefrom is laminated via a non-magnetic layer on another magnetic layer to form an MR film. The antiferromagnetic layer (PtMn, PdMn or NiMn) is laminated...
05/27/2003
6560058Positioning control device, changeable magnetic disc device, and head control method
A positioning control device is provided which is capable of avoiding the limit cycle in which the head moves back and forth between two dead zones on both sizes of the center of the target track. When a magnetic head is in the dead zone and the head posi...
05/06/2003
6525261Resin composition and an electronic device using the same
An electronic device, such as a solar cell, having improved moisture, heat, and wear resistance, formed by applying an insulating film over the surfaces of the electronic device utilizing a screen printing process and curing the film with heat. The insula...
02/25/2003
6435808Chip-type circuit element mounting apparatus
A chip mounting apparatus capable of permitting a chip mounting operation to be executed at an increased speed and ensuring continuous running of the apparatus over a long period of time. The apparatus includes a chip observing camera mounted on the side ...
08/20/2002
6370108Disc cartridge
A disc cartridge capable of enhancing operability of both a cover and an erasure preventing plug while ensuring smooth removal of a disc shaped medium therefrom. An upper casing member and a lower casing member are formed with cutouts, respectively, and t...
04/09/2002
6307831Disc cartridge having reference holes
A disc cartridge of a three-piece structure capable of being kept from being caught in an information recording/reproducing apparatus during loading/unloading thereof with respect to the apparatus. The disc cartridge includes an upper plate, a lower plate...
10/23/2001
6301078Disc cartridge and shutter
A disc cartridge capable of ensuring smooth sliding of a shutter on a casing while keeping a connection plate of the shutter from being abutted against or in contact with the casing, leading to a safe and increased-in-reliability sliding operation of the ...
10/09/2001
6213425Tape reel for tape cassette
A tape reel for a tape cassette capable of substantially preventing deformation thereof, even when it is thin-walled to substantially reduce a cycle time required for a molding step of the tape reel. The tape reel includes a reel hub and a disc-like flang...
04/10/2001
6205115Disc cartridge
A disc cartridge capable of effectively preventing inadvertent falling out or detachment of a disc from a casing during handling thereof, to thereby ensure safety of the disc cartridge. A cover includes a disc receiving section and is slidably arranged be...
03/20/2001
6181516Tape cassette
A tape cassette capable of preventing detachment of a lid structure from a casing and reducing a manufacturing cost thereof while being simplified in structure. A lid structure including a front lid, an upper lid and a rear lid is arranged in a manner to ...
01/30/2001
6152679Chip-type circuit element mounting apparatus
A chip mounting apparatus capable of permitting a chip mounting operation to be executed at an increased speed and ensuring continuous running of the apparatus over a long period of time. The apparatus includes a chip observing camera mounted on the side ...
11/28/2000
6136168Clean transfer method and apparatus therefor
A clean transfer method and an apparatus therefor capable of receiving, storing and transferring a transferred object by means of a vacuum clean box while eliminating arrangement of any vacuum evacuation means and transfer means in the vacuum clean box, a...
10/24/2000
6125011Disc cartridge with particular cover configuration
A disc cartridge of the open cover type capable of readily accomplishing takeout and insertion of a disc medium with respect to the cartridge while ensuring easiness of assembling thereof and increased reliability in operation thereof. An upper casing mem...
09/26/2000
6108298Disc cartridge
A disc cartridge of a three-piece structure capable of enhancing moldability and rigidity of a center frame. The center frame having a square-like shape is interposedly arranged between an upper plate and a lower plate and has a receiving space defined th...
08/22/2000
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