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TDK Corporation Patents
Assignee:
TDK Corporation
Address:
Tokyo, JP
No. of patents:
3451
Patents:




Patent Number Title Of Patent Date Issued
RE40928 Optical pickup October 6, 2009
An optical pickup comprises an objective-lens driving device including a movable section provided with an objective lens, a focusing coil, and tracking coils, and a fixed section provided with a single magnetic circuit having a magnetic gap, the focusing coil and the tracking coils b
RE40665 Multilayer ceramic capacitor March 17, 2009
A multilayer ceramic capacitor 1 having internal electrode layers 3, internal dielectric layers 2 having the thickness of less than 2 .mu.m, and external dielectric layers 20 wherein; the internal dielectric layers 2 and the external dielectric layers 20 include a plural number of di
RE40087 Coating composition and optical recording medium February 19, 2008
There are provided a composition for coating which can form an ink receiving layer having excellent adhesion with hydrophobic substrates, water-resistance and printing stability, and an optical recording medium having an ink receiving layer formed from this composition. The compositi
RE38648 Magneto-optical recording/reproducing pickup head with a diffraction grating and a wollaston pri November 9, 2004
A light source for generating light beams, a diffraction grating for splitting the light beam emitted from the light source into at least three light beams, and an objective lens for receiving the reflecting light beams from the recording medium, the magnification of the objective lens
RE34838 Permanent magnet and method for producing same January 31, 1995
In the rare earth-iron-boron permanent magnet, Ce and La decrease the magnetic properties when used alone but synergistically enhance iHc when used in combination.The composition provided by the present invention is generally expressed by [(Ce.sub.x La.sub.1-x).sub.y R.sub.1-y ].sub.2 [(
RE33294 Casing for magnetic tape cassette August 14, 1990
A casing for holding a magnetic tape cassette which is formed into a box shape by bending and joining a blank of a transparent .[.blastic.]. .Iadd.plastic .Iaddend.plate material which has one surface, constituting the inner surface of a casing, on which grooves and a minutely roughened
D596563 Coil unit July 21, 2009
D586745 Coil unit February 17, 2009
D560164 Bobbin for a transformer January 22, 2008
D539220 Ferrite magnetic core March 27, 2007
D537778 Ferrite magnetic core March 6, 2007
D528980 Noise filter September 26, 2006
D526960 Noise filter August 22, 2006
D526274 Noise filter August 8, 2006
D525198 Electrical signal processing module for a car radar equipment July 18, 2006
D489075 Combined slider and head for reading or writing information on a disk April 27, 2004
D475716 Combined slider and head for reading or writing information on a disk June 10, 2003
D475701 Card for wireless transmission June 10, 2003
D450069 Jig for lapping magnetic heads November 6, 2001
D427615 Jig for lapping magnetic heads July 4, 2000
D423025 Jig for lapping magnetic heads April 18, 2000
D420372 Jig for lapping magnetic heads February 8, 2000
D385848 Bobbin and magnetic core assembly November 4, 1997
D359726 Fastener for an electronic component June 27, 1995
D334913 Bobbin for use with a magnetic core April 20, 1993
D329041 Inductor for use in circuits for digital communications September 1, 1992
D323061 Package for electronic parts or the like January 14, 1992
D317155 Demagnetizer for magnetic head of cassette tape recorder May 28, 1991
D316178 Case for magnetic tape cassettes April 16, 1991
D314085 Magnetic cassette tape case January 29, 1991
D311002 Magnetic tape cassette October 2, 1990
D307000 Through-type capacitor April 3, 1990
D279762 Wrapping sheet for magnetic tape cassette July 23, 1985
D276567 Wrapping sheet for a cassette November 27, 1984
D276566 Wrapping sheet for a cassette November 27, 1984
7619873 Feedthrough multilayer capacitor November 17, 2009
A feedthrough multilayer capacitor has a capacitor body, at least two signal terminal electrodes, at least one grounding terminal electrode, and at least one connecting conductor. The capacitor body includes a plurality of insulator layers laminated, a signal inner electrode and a fi
7619871 Feedthrough multilayer capacitor array November 17, 2009
A feedthrough multilayer capacitor array having a capacitor body which has a plurality of insulator layers laminated, a first signal inner electrode connected to two first signal terminal electrodes, a second signal inner electrode connected to two second signal terminal electrodes, a fi
7619500 Common mode filter November 17, 2009
A common mode filter is provided as one in a three-layered structure with improved high-frequency characteristics. The common mode filter 1 has the three-layered structure including a first coil layer 14, a second coil layer 18, and a lead layer 16. A first planar coil 21 and a second pl
7619329 Permanent magnet member for coil motor and voice coil motor November 17, 2009
A magnet body 1 including a shorter periphery 11, a longer periphery 12 located at a position separated from the shorter periphery 11 by a predetermined distance, and a pair of side peripheries 13, 14 connecting the shorter periphery 11 and longer periphery 12 to each other, the magn
7619168 Flexible substrate, mounted structure, display unit, and portable electronic apparatus November 17, 2009
It is an object to provide a flexible substrate according to which noise due to layered components can be reduced effectively without depending on changing layered components and the mounting positions thereof. To attain this object, a flexible substrate, which is a flexible substrate fo
7618910 Dielectric ceramic composition production method November 17, 2009
A production method of a dielectric ceramic composition, comprising a main component comprised of barium titanate, a fourth subcomponent comprised of an oxide of R1 (note that R1 is at least one kind selected from a first element group composed of rare earth elements having a value of
7618497 R-T-B based rare earth permanent magnet and method for production thereof November 17, 2009
An R-T-B system rare earth permanent magnet, which comprises main phase grains consisting of R.sub.2T.sub.14B compounds and a grain boundary phase having a higher amount of R than the above described main phase grains, and which satisfies AVE(X)/Y=0.8 to 1.0; and (X/Y)max/(X/Y)min=2.
7617352 Memory controller, flash memory system having memory controller and method for controlling flash November 10, 2009
A memory controller includes decision means responsive to a request to write user data issued by a host computer for determining whether progressive data writing for writing user data to a target page designated by a host address is possible, and write means responsive to an affirmat
7616410 Magnetic detecting element having free layer formed of NiFe alloy and method of manufacturing th November 10, 2009
There are provided a magnetic detecting element capable of maintaining large .DELTA.RA and of reducing magnetostriction by improving a material forming a free magnetic layer, and a method of manufacturing the same. An NiFeX alloy layer is formed in a free magnetic layer. For example, the
7616404 Magnetic recording medium, magnetic recording and reproducing apparatus, and method for manufact November 10, 2009
The magnetic recording medium includes a substrate and a recording layer formed in a predetermined concavo-convex pattern over the substrate, and the recording layer includes recording elements each formed as a convex portion of the recording layer. Surface steps are formed in an inner a
7616085 Common mode choke coil November 10, 2009
A common mode choke coil includes two laminated coil conductors, a first magnetic substrate arranged on one of the coil conductors, and a second magnetic substrate arranged on the other coil conductor. When it is assumed that a distance from a conductor center of the one coil conductor
7615996 Examination method for CPP-type magnetoresistance effect element having two free layers November 10, 2009
An examination method is structured, with respect to a magnetization direction of an orthogonalizing bias function part formed on a posterior part of an magnetoresistance (MR) effect element, of changing the magnetization direction of the orthogonalizing bias function part between a
7615913 Composite electronic component November 10, 2009
A composite electronic component provided is one with sufficient impact resistance. In this resonator 1, a piezoelectric element 2 is supported by receivers 73, 83 in platelike holding portions 72, 82, and edge parts 74a, 84a in the holding portions 72, 82 are in contact with a capacitiv
7615292 Magnetic recording medium November 10, 2009
A magnetic recording medium having a recording layer formed in a concavo-convex pattern, which can allow a head to have stable flying characteristics. The recording layer is formed in a concavo-convex pattern, and concave portions of the concavo-convex pattern of the recording layer
7615084 Secondary battery, and its production process November 10, 2009
A cathode, an anode and a porous film are first provided. Then, the cathode and anode are aligned with the porous film and a part of the cathode and a part of the anode are fixed to said porous film. Then, the cathode, anode and porous film are immersed in a liquid electrolyte. Final

 
 
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