163 results about "Recording layer" patented technology

IR-sensitive lithographic printing plate precursors provide a stable print-out image using a unique IR radiation-sensitive composition in an infrared radiation-sensitive image-recording layer. This IR radiation-sensitive composition includes: (1) a free radical initiator composition that comprises an electron-donating agent; (2) a free radically polymerizable composition; and (3) a color-changing compound that is represented by the Structure (I) having a conjugated carbon chain between the aromatic terminal groups. The compound also has a —SO2—R3 group wherein R3 represents alkyl, aryl or heteroaryl groups. After IR imaging, these precursors exhibit desirable printout images both fresh and after dark storage. The precursors can be developed off-press or on-press.

Provided are a magnetoresistance effect element capable of inverting the magnetization of a recording layer by a small current, and an integrated circuit using the same. A magnetoresistance effect element 1 includes a layer 11 including Ru and O, a metal layer 12 provided adjacent to the layer 11 including Ru and O, a recording layer 13 including a magnetic body provided adjacent to the metal layer 12, a barrier layer 14, and a reference layer 15, the metal layer 12 including one or more metals selected from the group consisting of Pt, W, Ta, Ti, Cr, and V. The integrated circuit is composed of a plurality of magnetoresistance effect elements 1.

The invention discloses a multi-focal near-to-eye display holographic optical element and a preparation method and device thereof. The element adopts a composite structure of a substrate, a multi-focal correction layer and a holographic recording layer, a holographic grating accurately matched with each optical partition of the correction layer is formed in the recording layer through a partition exposure technology, and multi-depth virtual image display and user refraction correction functions can be realized at the same time. The preparation device comprises a coherent light source, a beam splitter, a diffusion plate, a focal plane displacement system, a mask component and a master controller, and partition exposure is realized through cooperative control. The problem that traditional near-to-eye display cannot meet multi-focus display and refraction correction at the same time is solved, a user can clearly perceive fused multi-depth virtual information and a real environment without additionally wearing glasses, the visual comfort and experience are remarkably improved, and the method is suitable for AR / VR and other head-mounted display devices.

There is provided an on-press development type lithographic printing plate precursor including a support, and an image-recording layer provided on the support, in which the image-recording layer contains (1) or (2).(1) a borate compound represented by Formula (1) and an electron-accepting polymerization initiator(2) a borate compound represented by Formula (1a)in Formula (1) and Formula (1a), R1, R2, R3, and R4 each independently represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted alkynyl group, and R1, R2, R3, and R4 may each independently have a ring structure. Provided that at least one of R1, R2, R3, or R4 is different from the other. M+ represents a cation. Ma+ represents an iodonium cation.

A magnetic recording medium includes a nonmagnetic substrate, an underlayer disposed above the nonmagnetic substrate, and a magnetic recording layer disposed above the underlayer. The magnetic recording layer includes a first magnetic layer disposed above the underlayer, and a second magnetic layer disposed above the first magnetic layer. Each of the first magnetic layer and the second magnetic layer has a granular structure including magnetic grains having a L10 structure and a grain boundary portion. The grain boundary portion of the first magnetic layer includes aluminum nitride, and the grain boundary portion of the second magnetic layer includes hexagonal boron nitride. An aluminum nitride content in the first magnetic layer is in a range of 15 vol % to 35 vol %, and a peak in a B1s spectrum of the grain boundary portion of the second magnetic layer observed using X-ray photoelectron spectroscopy is 191.6 eV or less.

Various devices, apparatuses, methods, and media for heat assisted magnetic recording (HAMR) are disclosed that, in some examples, provide HAMR media with a platinum doped CO-BN capping layer. In one example, the HAMR medium includes a CoPtBN capping layer on a magnetic recording layer having Pt in a range of 5 atomic percent (at.%) to 12 at.%. The atomic ratio of Co to Pt in the CoPtBN may be in the range of, for example, 5 to 13. The BN in the CoPtBN may comprise, for example, from 22 mol% to 30 mol% of the CoPtBN. The CoPtBN may have a face-centered cubic (FCC) crystal structure. The HAMR media may have various other layers, such as a substrate, a heat sink layer on the substrate, and a seed layer on the heat sink layer, with the magnetic recording layer on the seed layer. The seed layer may include MgO or MgO-TiO. An amorphous soft underlayer (SUL) may be provided.

A magnetoresistive effect element includes a reference layer, a barrier layer, a recording layer, and a channel layer that are disposed on top of one another, and a first terminal connected to the reference layer, and a second terminal and a third terminal connected to the channel layer. The channel layer includes a first channel layer and a second channel layer, the first channel layer has electrical resistance larger than electrical resistance of the second channel layer, the second terminal is connected to the first channel layer, and the third terminal is connected to the second channel layer, a write current flows between the second terminal and the third terminal via the first channel layer and the second channel layer, and a read current flows between the first terminal and the third terminal.

To provide a recording material in which a printing part is excellent in water resistance and alcohol resistance.SOLUTION: There are provided a developer containing a compound represented by the following general formula (1) (wherein, n represents 0 to 2. R1 represents a halogen atom, a straight or branched chain alkyl group having 1 to 8 carbon atoms, a straight or branched chain alkoxy group having 1 to 8 carbon atoms or a substituent of the formula (2). R2 represents a hydrogen atom, an alkyl group which may be substituted or an aryl group which may be substituted.), a recording material containing the developer, a thermosensitive recording layer containing the recording material and a thermosensitive recording paper having the thermosensitive recording layer.SELECTED DRAWING: None

Disclosed is a heat-sensitive recording body which has, on one side of a paper support, a primer layer containing hollow particles having a hollow ratio of 80 to 98% and a heat-sensitive recording layer containing a leuco dye and a color developer in this order, and on the other side of the paper support, a back layer containing a pigment, wherein the back layer has a Gurley smoothness of 500 seconds or more, and the hollow particles are contained in a proportion of 5 to 30% by mass in the total solid content of the primer layer.

Provided is a heat-sensitive recording body which is environmentally friendly and has excellent water resistance and oil resistance as well as excellent color developing performance.　The heat-sensitive recording body has a heat-sensitive recording layer containing a colorless or light-colored electron-donating leuco dye and an electron-accepting developer on a support, wherein the electron-accepting developer is an isolated lignin, and the heat-sensitive recording layer contains toluenesulfonamide as a sensitizer.

To provide a magnetic recording medium in which perpendicular orientation of a magnetic recording layer is enhanced and further high recording density is made possible, and to provide a magnetic recording and reproducing device provided with the magnetic recording medium.SOLUTION: A magnetic recording medium 1 according to the present invention includes an underlayer 30, a seed layer 40, and a magnetic recording layer 60 in this order on a non-magnetic substrate 10, wherein the seed layer 40 contains two elements phase-separated from each other, one phase of an element α mainly has a columnar crystal of an fcc structure, and the other phase of an element β mainly has an amorphous structure, the underlayer 30 includes a first underlayer 31, a second underlayer 32, and a third underlayer 33 from the side of the non-magnetic substrate 10, the first underlayer 31 mainly contains any of Ru, Cr, and Ni, the second underlayer 32 mainly contains the one element α, and the third underlayer 33 mainly contains any of Ru, Cr, and Mo.SELECTED DRAWING: Figure 1

A negative-working lithographic printing plate precursor has a negative-working infrared radiation-sensitive image-recording layer that has a) two or more free radically polymerizable components; b) an initiator composition capable of generating free radicals; and c) one or more infrared radiation absorbing cyanine dyes. The a) two or more free radically polymerizable components comprise a combination of a urethane (meth)acrylate and a polyester (meth)acrylate, which together, comprise 75-100 weight % of all free radically polymerizable components. The weight ratio of the urethane (meth)acrylates to the polyester (meth)acrylates is from 90:10 to and including 35:65. The urethane (meth)acrylates comprise one or more urethane linkages and at least 4 acrylate or methacrylate ester groups. Each of the one or more polyester (meth)acrylates is free of a urethane linkage and is represented following structure (I). These precursors are less sensitive to ambient ozone and can be infrared radiation imaged and developed on-press during lithographic printing.

A positive-working lithographic printing plate precursor including a support and an image-recording layer formed on the support and consisting of a positive-working photosensitive resin composition, in which the positive-working photosensitive resin composition contains a compound having at least one electron-withdrawing group and at least one phenolic hydroxyl group in one molecule, an alkali-soluble resin, and an infrared absorber, and the electron-withdrawing group excludes a sulfonyl group; and a method of preparing a lithographic printing plate using the positive-working lithographic printing plate precursor.

The application belongs to the field of optical storage, and specifically discloses an optical disc data reading method and device. The optical disc involved in the application comprises a plurality of data layers, each data layer comprising a plurality of data blocks. The optical disc data reading method comprises the following steps: focusing imaging light to a preset data layer of the optical disc; obtaining images of each data block in the preset data layer based on the imaging light when the optical disc rotates; controlling the imaging light to stably focus on the preset data layer according to the brightness and the definition of each data block image, and then reading corresponding data information based on the images of each data block. According to the application, the defocus distance and direction can be accurately predicted in combination with the definition evaluation function, and real-time focus control can be performed in the process of continuous rotation of the optical disc. Data is read in a pure image mode, and focus servo control can be completed without making a data recording layer with a track in the optical disc, so that reading of hundreds of layers of data in a multi-dimensional storage optical disc can be realized.

A display technology capable of displaying special images is provided. A display body (1) includes: a light-shielding layer (12) having a plurality of slits (SL) arranged at intervals in the width direction; and an image recording layer (22) spaced apart from a main surface of the light-shielding layer (12) and opposite it, and recording a latent image that is made visible by being partially hidden by the light-shielding layer (12).

An optical recording medium capable of suppressing a decrease in reproduction durability is provided. [Solution] In an optical recording medium, a first disc (10) includes at least one information signal layer (L0-Ln). The information signal layer includes a first dielectric layer (14), a recording layer (13), and a second dielectric layer (15), in that order, with the first dielectric layer being located deeper than the recording layer when viewed from a first light irradiation surface (C1). The recording layer includes Mn and O. The first dielectric layer includes Zn, Sn, Al, and O or Zn, Sn, Ti, and O, with the Al content relative to the total amount of Zn, Sn, and Al being 10 atomic % or more, and the Ti content relative to the total amount of Zn, Sn, and Ti being 10 atomic % or more.

A method of manufacturing a magnetic recording medium includes burnishing, with an abrasive material, a surface of a stack including a magnetic recording layer and a protective layer stacked on a substrate in order of the magnetic recording layer and the protective layer. The burnishing of the surface of the stack includes using a long abrasive tape including abrasive grains as the abrasive material fixed onto a support in a state of being wound in roll form, and pressing the abrasive tape, supplied from the state of being wound in the roll form, against the surface of the stack so as to rub the surface of the stack. The abrasive tape in the state of being wound in the roll form is subjected to vacuum treatment in advance such that loose abrasive grains are reduced.

The purpose of the present invention is to provide a method for manufacturing a magnetic recording medium, wherein foreign matter on the surface of the magnetic recording medium can be efficiently removed, and the coating rate by a lubricating layer is high. A method for manufacturing a magnetic recording medium according to the present invention is a method for manufacturing a magnetic recording medium in which a lubricating layer is formed on a laminate in which a magnetic recording layer and a protective layer are laminated in this order on a substrate, the method comprising: a step for applying a first lubricant and a second lubricant on the laminate, and a polishing step for polishing the surface of the laminate to which the first lubricant and the second lubricant have been applied with a polishing material, and a step for removing the second lubricant from the laminate, the polishing step including: a step for pressing and rubbing a tape containing the polishing material against the surface of the laminate; the step of removing the second lubricant includes a step of irradiating the laminate coated with the first lubricant and the second lubricant with light emitted from an LED light source.

The invention provides a magnetic tunnel junction which comprises a reference layer, a barrier layer, a free layer and a covering layer which are arranged in a stacked mode, the free layer comprises m (m is larger than or equal to 2) magnetic recording layers which are arranged in a stacked mode, the lowest magnetic recording layer makes contact with the barrier layer, and the uppermost magnetic recording layer makes contact with the covering layer. M-1 intermediate oxide layers, each intermediate oxide layer being located between every two adjacent magnetic recording layers and being in contact with the lower adjacent magnetic recording layer; and at least one buffer layer located between the intermediate oxide layer and the above adjacent magnetic recording layer for improving the interface characteristics of the intermediate oxide layer / magnetic recording layer. According to the invention, the STT efficiency of the multi-interface MTJ can be improved.

There are provided an on-press development type lithographic printing plate precursor including a support, and an image-recording layer on the support, in which the image-recording layer contains two or more electron-donating polymerization initiators and an electron-accepting polymerization initiator, and the two or more electron-donating polymerization initiators are borate compounds, and at least one of the two or more electron-donating polymerization initiators is a borate compound represented by Formula (1), in which, R1, R2, R3, and R4 each independently represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted alkynyl group, and R1, R2, R3, and R4 may each independently have a ring structure, provided that at least one of R1, R2, R3, or R4 is different from the other, and M+ represents a cation.

The present invention addresses the problem of providing a method for manufacturing a magnetic recording medium capable of improving the productivity of a magnetic recording medium. A method for manufacturing a magnetic recording medium according to the present invention comprises a polishing step for polishing the surface of a laminate in which a magnetic recording layer and a protective layer are laminated in this order on a substrate with a polishing material, the polishing step includes a step of using a long abrasive tape in a state in which abrasive grains, which are the abrasive material, are adhered to a support body, and pressing and rubbing the abrasive tape, which is supplied from the state in which the abrasive tape is wound in the state in which the abrasive tape is wound in the state in which the abrasive tape is wound in the state in which the abrasive tape is wound in the state in which the abrasive tape is wound in the state in which the abrasive tape is wound, against the surface of the laminate. The grinding belt in which abrasive grains that are dissociated by the vacuum treatment have been reduced in advance is used as the grinding belt that is wound in the roll shape.

A negative working lithographic printing plate precursor has a negative working infrared radiation sensitive image recording layer having a) two or more free radical polymerizable components; b) an initiator composition capable of generating free radicals; and c) one or more infrared radiation absorbing cyanine dyes. A) the two or more radically polymerizable components comprise a combination of a urethane (meth) acrylate and a polyester (meth) acrylate together making up 75-100% by weight of all the radically polymerizable components. The weight ratio of the urethane (meth) acrylate to the polyester (meth) acrylate is from 90: 10 to 35: 65. The urethane (meth) acrylate comprises one or more urethane linkages and at least 4 acrylate groups or methacrylate groups. The one or more polyester (meth) acrylates each do not contain a urethane bond and are represented by the following structure (I). These precursors are less sensitive to ambient ozone and can be imaged by infrared radiation and developed on-press during lithographic printing.

A magnetic recording medium is described that includes a substrate and an amorphous soft underlayer (SUL). An Ni—Pt seed layer is formed on the SUL where the Pt atoms have substitutionally replaced at least some of the Ni atoms within an Ni lattice structure of the Ni—Pt to form a solid solution of Ni—Pt. In some examples, the Ni—Pt seed layer is formed of Ni40Pt60. An Ru interlayer is formed on the seed layer. In some examples, the Ni—Pt seed layer has a lattice mismatch with the Ru interlayer of 0.4% or less. A magnetic recording layer is formed on the Ru interlayer. Additional layers or films may be provided. The medium may be configured for use with perpendicular magnetic recording (PMR). A data storage device that includes the magnetic recording medium is described. Methods for fabricating the magnetic recording medium are set forth herein as well.

According to one embodiment, a magnetic disk device includes recording layers, write heads, read heads, a selector circuit that allows two or more read heads to be selected from among the read heads, a read target selection unit, a read processing unit, and a detection unit. When the read target selection unit selects the first recording layer and the second recording layer the read processing unit controls driving of the selector circuit and causes the selector circuit to select the first read head and the second read head to read data of the first recording layer and data of the second recording layer simultaneously, and the detection unit detects a state of the first recording layer and a state of the second recording layer.

The present invention provides a layered body with which it is possible to improve drawing speed.　The layered body comprises: at least three recording layers each capable of changing the color state thereof to a different color under near infrared laser light; and a diffuse reflection layer (21) disposed below the at least three recording layers. The total light reflectivity of near infrared light having a wavelength of 1080 nm that arrives at the diffuse reflection layer (21) from the at least three recording layers side is at least 93.0%.

A magnetic recording medium is described that includes a substrate and an amorphous soft underlayer (SUL). A Ni-Pt seed layer is formed on the SUL in which Pt atoms have substituted at least some of the Ni atoms within the Ni lattice structure of Ni-Pt to form a solid solution of Ni-Pt. In some examples, the Ni-Pt seed layer is formed from Ni40Pt60. A Ru intermediate layer is formed on the seed layer. In some examples, the lattice mismatch of the Ni-Pt seed layer and the Ru intermediate layer is 0.4% or less. A magnetic recording layer is formed on the Ru intermediate layer. Additional layers or films may be provided. The media may be configured for use with perpendicular magnetic recording (PMR). A data storage device is described that includes the magnetic recording medium. Methods for manufacturing the magnetic recording media are also described herein.

The purpose of the present invention is to provide a heat-sensitive recording medium which hardly causes safety concerns such as endocrine disrupting chemicals, and is excellent in chromogenic properties and light resistance, and also excellent in heat resistance. A heat-sensitive recording medium (1) has a configuration in which a heat-sensitive recording layer (3) is layered on a substrate (2). The heat-sensitive recording layer (3) comprises a color former, a non-phenol-based developer, and a non-phenol-based ultraviolet absorber. The non-phenol-based ultraviolet absorber comprises an oxanilide-based ultraviolet absorber. Preferably, the non-phenol-based developer comprises a compound represented by the following formula (1) and / or a compound represented by the following formula (2).(The symbols in the formulae (1) and (2) are as defined in the specification.)

The invention provides a method for manufacturing a magnetic recording medium capable of improving the productivity of the magnetic recording medium. This method for manufacturing a magnetic recording medium comprises: a finishing step for finishing the surface of a laminated body in which a magnetic recording layer and a protective layer are laminated in this order on a substrate by means of an abrasive material, said finishing step comprising: using a long abrasive tape in a state in which the abrasive tape is wound into a roll; and a scraping step for scraping the surface of the laminated body by pressing the abrasive tape, which is supplied from the state of being wound into the roll shape and in which abrasive grains are adhered to a support as the abrasive material, on the surface of the laminated body, using the abrasive tape from which free abrasive grains have been removed by being rewound in advance, and scraping the surface of the laminated body by pressing the abrasive tape on the surface of the laminated body. And the grinding belt is wound into the roll shape.

Disclosed is a heat-sensitive recording body, which is a heat-sensitive recording body provided with a primer layer formed on one side of a support and a heat-sensitive recording layer formed on the primer layer, the heat-sensitive recording layer containing a leuco dye and a color developer, the primer layer containing hollow particles and a binding resin, the maximum particle diameter (D100) of the hollow particles being 10 to 30 µm, the particle diameter (D50) of 50 vol% of the hollow particles being 4.0 to 15 µm, the ratio D100 / D50 of the maximum particle diameter (D100) to the particle diameter (D50) of the hollow particles being 1.8 to 3.0, and the vol% of the hollow particles having a particle diameter of 2.0 µm or less being 1% or less.

A magnetic recording medium includes a nonmagnetic substrate; a base layer over the nonmagnetic substrate; a seed layer over the base layer; and a magnetic recording layer over the seed layer. The seed layer includes two elements that are phase-separated from each other. A phase of one element of the two elements, represented by element α, mainly includes a columnar crystal having an fcc structure. A phase of another element of the two elements, represented by element β, mainly includes an amorphous structure. The base layer includes, in sequence from the nonmagnetic substrate, first, second, and third base layers. The first base layer mainly includes Ru, Cr, or Ni. The second base layer mainly includes the element α. The third base layer mainly includes Ru, Cr, or Mo.