| Patent application number | Description | Published |
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| 20080233507 | TWO COMPONENT DEVELOPER - A two component developer used in an electrophotographic method composed of a toner containing at least a resin and a colorant, and a carrier, is disclosed. The resin is composed of a polyester resin and a styrene-acryl resin, in which the polyester resin is prepared via condensation-polymerization of a polyvalent carboxylic acid and a polyol in a state where a styrene monomer and an acrylate monomer exist in an aqueous medium containing an acidic compound, followed by formation of the styrene-acryl resin via radical polymerization of the styrene monomer and the acrylate monomer; and the carrier comprises magnetic material powder dispersed in a binder resin, and has a volume based median diameter of 10 μm-100 μm, a shape factor SF-1 of 1.0-1.2, and a shape factor SF-2 of 1.1-2.5. | 09-25-2008 |
| 20090059439 | MULTICHANNEL THIN-FILM MAGNETIC HEAD WITH DUMMY SHIELDS - Provided is a multichannel thin-film magnetic head having a plurality of read head elements neighboring with each other, each of which includes shield layers having a desired stable magnetic-domain structure. The head comprises at least one read head part comprising a plurality of read head elements aligned in the track width direction, wherein each of the plurality of read head elements comprises a lower shield layer and an upper shield layer, and the at least one read head part comprises: a lower shield part comprising a plurality of the lower shield layers aligned in the track width direction; and an upper shield part comprising a plurality of the upper shield layers aligned in the track width direction, and wherein dummy shield layers are provided respectively on both sides of at least the lower shield part. | 03-05-2009 |
| 20090109577 | MAGNETO-RESISTIVE EFFECT DEVICE OF THE CPP STRUCTURE AND MAGNETIC DISK SYSTEM - The invention provides a magneto-resistive effect device of the CPP structure comprising a nonmagnetic intermediate layer, and a first ferromagnetic layer and a second ferromagnetic layer stacked together and formed with the nonmagnetic intermediate layer sandwiched between them. The first ferromagnetic layer and the second ferromagnetic layer are magnetically coupled via the nonmagnetic intermediate layer such that the magnetizations of the first ferromagnetic layer and the second ferromagnetic layer are antiparallel with each other, wherein the mutually antiparallel magnetizations of two magnetic layers lie in a medium opposite plane or front to rear direction and in a rear to front direction. The second ferromagnetic layer is divided by a nonmagnetic intervening layer into a front second ferromagnetic layer and a rear second ferromagnetic layer on the way from the front to the rear, and the front second ferromagnetic layer and a front portion of the first ferromagnetic layer located at a position that makes a pair with the front second ferromagnetic layer via the nonmagnetic intermediate layer defines a substantial magnetic sensor portion with a sense current applied to it in a stacking direction. It is thus possible not only to make use of a structure capable of narrowing the read gap (between the upper and the lower shield) to make improvements in linear recording densities thereby meeting recent demands for ultra-high density recording, but also to get around a problem of unneeded information being written on the medium (media) and make the device less likely to be affected by the magnetic field, thereby enhancing the stability of operation of the device itself as well. | 04-30-2009 |
| 20090130491 | Magneto-resistive element for a magneto-resistive device and methof of manufacturing thereof - A magnetoresistive element (MR element) for reading a change in a magnetic field of a magnetic recording medium includes first and second electrode layers for providing a sensing current, which are perpendicular to an air bearing surface (ABS) facing the magnetic recording medium, first and second free layers which have a magnetization direction which changes in accordance with an external magnetic field, and a spacer layer composed of non-magnetic material. A ratio of a representative width and a representative length of each of the first and second free layers is at least 2 to 1, to thereby provide initial magnetizations along a direction of the representative length of each of the first and second free layers. | 05-21-2009 |
| 20090190271 | Magnetoresistive element and magnetic head - An MR element includes a first ferromagnetic layer, a second ferromagnetic layer, a spacer layer disposed between the first and second ferromagnetic layers; and an antiferromagnetic layer disposed on a side of the first ferromagnetic layer farther from the spacer layer. The antiferromagnetic layer is disposed away from a detection surface. The first ferromagnetic layer includes: a first portion having an end face located in the detection surface and a rear end opposite to the end face; and a second portion located away from the detection surface and connected to the rear end of the first portion. The first portion has a first surface touching the spacer layer, and a second surface that is opposite to the first surface and that does not touch the antiferromagnetic layer. The second portion has a third surface touching the antiferromagnetic layer, and a fourth surface opposite to the third surface. The distance between the first surface and the second surface is smaller than the distance between the third surface and an imaginary plane including the first surface. | 07-30-2009 |
| 20090214974 | TONER FOR DEVELOPING ELECTROSTATIC IMAGE, FULL COLOR TONER KIT, AND IMAGE FORMATION METHOD - Disclosed is a toner for developing an electrostatic image, a full color toner kit comprising the toner and an image formation method employing the a full color toner kit, the toner comprising at least a resin and a colorant, wherein the colorant includes C.I. Pigment Blue 60 having a powder X-ray diffraction peak (2θ) at 6.3±0.2° and 13.0±0.2°. | 08-27-2009 |
| 20090239164 | TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT, FULL-COLOR TONER KIT AND IMAGE FORMING METHOD - An electrophotographic toner for electrostatic image development which is capable of obtaining a high chroma full-color image exhibiting clear color without color contamination and excellent light stability is disclosed, comprising a resin and a colorant, wherein the colorant comprises a pigment of C.I. Pigment Blue | 09-24-2009 |
| 20090239168 | TONER FOR DEVELOPING ELECTROSTATIC IMAGE, FULL COLOR TONER KIT, AND IMAGE FORMATION METHOD - Disclosed are a toner for developing an electrostatic image, a full color toner kit and an image formation method layer, the toner comprising at least a resin and a colorant, wherein the colorant includes quinacridone pigment having a number average primary particle size of from 30 to 150 nm and having a ratio of a long axis length to a short axis length of from 1.0 to 2.0. | 09-24-2009 |
| 20090246656 | TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT, FULL-COLOR TONER KIT AND IMAGE FORMING METHOD - An electrophotographic toner for electrostatic image development which is capable of obtaining a high chroma full-color image exhibiting clear color without color contamination and achieving enhanced lightfastness is disclosed, comprising a resin and a colorant, wherein the colorant comprises a pigment of C.I. Pigment Red 209. There are also disclosed a full-color toner kit and an image forming method by use of the toner. | 10-01-2009 |
| 20090271962 | Electronic device and method of making same - The present invention provides an electronic device with improved characteristics and a method of making the electronic device. In a method of making an electronic device (piezoelectric device) | 11-05-2009 |
| 20100028798 | TONER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT AND IMAGE FORMING METHOD - A toner for electrostatic latent image development, in which the image quality is fine, toner blister would not occur, and furthermore, the image quality which can fulfill customer's satisfaction can be obtained regardless of the temperature humidity environment in the image forming. The toner for electrostatic latent image development is made by agglomeration of resin particles and colorant particles in an aqueous medium. The acid value of the toner is less than 20 mgKOH/g, and the hydroxyl value of the toner is 7 to 57 mgKOH/g. | 02-04-2010 |
| 20100188782 | Magnetoresistive element and thin-film magnetic head - A magnetoresistive element includes: a detection surface that receives a magnetic field to be detected; a free layer made of a ferromagnetic material, having an end face located in the detection surface, and exhibiting a change in magnetization direction in response to the magnetic field to be detected; a pinned layer made of a ferromagnetic material, disposed away from the detection surface, and having a fixed magnetization direction; and a coupling portion made of a nonmagnetic material and coupling the free layer to the pinned layer. The coupling portion includes a nonmagnetic conductive layer that allows electrons to be conducted while conserving their spins. | 07-29-2010 |
| 20100202088 | Magnetoresistive element, thin film magnetic head, magnetic head slider, head gimbal assembly, head arm assembly and magnetic disk device - The invention is devised to provide a magnetoresistive element that is hardly susceptible to harmful influence of unnecessary magnetic fields and noise of heat even when reduction in size is achieved to be adaptable to higher recording density, and therefore that is excellent in operational reliability. The magnetoresistive element includes a stacked structure including, in order: a magnetically pinned layer whose magnetization direction is fixed in a given direction; a non-magnetic layer; a magnetically free layer whose magnetization direction changes according to an external magnetic field; and an antiferromagnetic bias layer exchange-coupled with the magnetically free layer. The exchange-coupling magnetic field between the magnetically free layer and the antiferromagnetic bias layer is smaller than a saturation magnetic field of the magnetically free layer. | 08-12-2010 |
| 20100203442 | MANUFACTURING METHOD OF MAGENTA TONER FOR DEVELOPING ELECTROSTATIC IMAGE AND TONER - Disclosed is a manufacturing method of a magenta toner including the steps of dispersing an oil phase containing a radical polymerizable monomer for forming the binder resin and the colorant in an aqueous medium to form dispersion liquid in which the oil phase is dispersed in a form of droplets in the aqueous medium, and polymerizing the radical polymerizable monomer in the droplets in dispersion liquid to form resin particles containing colorant, in which the colorant comprises C.I. Solvent Red 48. | 08-12-2010 |
| 20100266942 | ELECTROSTATIC IMAGE DEVELOPING TONER - A manufacturing method of an electrophotographic toner is disclosed. The method includes steps of dispersing the minute colored particles having a volume average particle diameter of D1 in the toner binder resin, the toner particle satisfies formula of 3=D2/D1>1, wherein D2 is an average diameter of dye cloud formed by the colored particles in the toner particle. | 10-21-2010 |
| 20110008720 | TONER FOR DEVELOPING ELECTROSTATIC IMAGE, FULL COLOR TONER KIT, AND IMAGE FORMATION METHOD - Disclosed are a toner for developing an electrostatic image, a full color toner kit and an image formation method, the toner containing at least a resin and a colorant, wherein the colorant comprises a quinacridone pigment having a number average primary particle size of from 30 to 150 nm and having a ratio of a major axis direction length to a minor axis direction length of from 1.0 to 2.0 and Pigment Red 238. | 01-13-2011 |
| 20110025321 | MAGNETIC SENSOR - A magnetic sensor includes first to fourth MR elements. The first and second MR elements are connected at respective ends thereof through a first connecting portion in a central region. The third and fourth MR elements are connected at respective ends thereof through a second connecting portion that crosses the first connecting portion with a distance in a thickness direction in the central region. The first and fourth MR elements are connected at respective other ends thereof through a third connecting portion, and the second and third MR elements are connected at respective other ends thereof through a fourth connecting portion. Resistance values of the first and third MR elements change in a same increasing/decreasing direction, whereas resistance values of the second and fourth MR elements change in an increasing/decreasing direction opposite to the first and third MR elements, depending on an external signal magnetic field. | 02-03-2011 |
| 20110025322 | MAGNETO-RESISTANCE EFFECT ELEMENT AND SENSOR - A magneto-resistance effect element for a sensor to sense a variation in externally applied magnetism includes a pinned layer having a fixed magnetization direction, a free layer having a magnetization direction which varies in response to an external magnetic field, and an intermediate layer provided between the pinned layer and the free layer. The pinned layer has a planar shape which is long in the fixed magnetization direction and which is short in a direction orthogonal to the fixed magnetization direction. Moreover, the pinned layer preferably has a planar shape in which the pinned layer is divided into a plurality of sections. | 02-03-2011 |
| 20110068786 | MAGNETIC SENSOR AND MANUFACTURING METHOD THEREOF - A magnetic sensor includes: a first and a second magnetoresistive elements each including: a magnetization free layer; a nonmagnetic spacing layer; a magnetization pinned layer having one or more first layers of a first group of ferromagnetic layers and one or more second layers of a second group of ferromagnetic layers, in which the first layer and the second layer are stacked alternately with a nonmagnetic coupling layer in between, and so antiferromagnetically coupled to each other as to have opposite magnetizations to each other; and an antiferromagnetic layer pinning magnetization orientation in the one or more first and the second layers. The first layers in the first magnetoresistive element are one more in number than that of the one or more second layers. The number of the one or more first layers and that of the one or more second layers in the second magnetoresistive element are equal. | 03-24-2011 |
| 20110111443 | APPARATUS FOR AUTO-PRETREATING SUGAR CHAIN - To provide an autoanalyzer for analyzing a sugar chain contained in a biological sample, in particular, serum. Namely, it is intended to provide a method of analyzing a sugar chain in a sample, which comprises the following steps: A) the sugar chain-releasing step of releasing the sugar chain in the sample; B) the detection sample-preparing step of preparing the released sugar chain for detection; and, in the case of conducting mass spectrometry using a plate, C) the step of forming a plate for the mass spectrometry having the captured sugar chain dotted thereon which comprises the step of providing the tagged sugar chain sample solution obtained in the step B) on a collection plate; and, if required, the step of conducting an operation in a solid phase support-enclosed plate to form the plate for mass spectrometry; and D) the step of analyzing the sugar chain to be assayed. | 05-12-2011 |
