Abstract: Epitaxial ferroelectric and magnetic recording structures having graded lattice matching layers are disclosed. A single crystal material such as Si may be used as a substrate material upon which the graded lattice matching layers are deposited. The lattice matching layers may comprise metals and metal alloys, or may comprise oxides doped with selected elements or deposited under different oxygen pressures. A recording layer, such as ferroelectric lead zirconium titanate or a magnetic Fe/Pt multilayer structure, is deposited on the graded lattice matching layers.

Abstract: Patterned thin films comprise regions of relatively low thermal conductivity material separated by regions of relatively high thermal conductivity material. The low thermal conductivity regions may be provided in the form of cylinders or cuboids which are arranged in a continuous matrix of the high thermal conductivity material. The thin film may be used as thermal control layers in data recording media such as heat assisted magnetic recording media.

Abstract: Disclosed herein are a dot-patterned structure for magnetic recording bits and a magnetic recording medium provided therewith. The former exhibits high functionality and high performance owing to good crystallinity. The dot-patterned structure is composed of a first layer, which is continuous, and a second layer, which is discrete. The magnetic recording medium having a dot-patterned recording layer is formed by the steps of treating an underlying layer by lithography, thereby forming grooves, filling the grooves by epitaxial growth with the same material as the underlying layer, removing the photoresist used for lithography in a solvent, thereby forming pits, and filling the pits by epitaxial growth with a magnetic film as the recording layer.

Abstract: The present invention provides an imprint mold structure which can efficiently and uniformly transfer a pattern by enhancing flow of a composition of the imprint resist layer when the imprint mold structure is pressed against the imprint resist layer, an imprinting method of improved transfer accuracy by using the imprint mold structure, and a magnetic recording medium of improved recording and reproduction property. Provided is an imprint mold structure in which at at least any one of an inner circumferential edge and an outer circumferential edge of the concavo-convex patterns in a data area and a servo area of the disc-shaped substrate of the imprint mold structure a dummy pattern is formed which corresponds to a pattern on a magnetic recording medium substrate extending radially from at least any one of an inner circumferential edge and an outer circumferential edge of a pattern forming area.

Abstract: The present invention has its object to offer magnetic recording medium and magnetic recording and reproducing device that can record and reproduce high density data by optimizing the soft magnetic layer material forming the soft magnetic underlayer and the under layer material. In the present invention, the perpendicular magnetic recording medium A has at least the soft magnetic underlayer a, the under layer 5, the intermediate layer 6 and the perpendicular magnetic recording layer on the non-magnetic substrate 1. The soft magnetic layers 2, 4 that form the soft magnetic underlayer a, has an amorphous structure and is made of CoAl alloy or CoFeAl alloy having saturation magnetic flux density Bs greater than 1.1 T.

Abstract: The imprint mold structure of the present invention is an imprint mold structure including at least a disc-shaped substrate having a concavo-convex pattern having a plurality of convex portions, wherein the imprint mold structure is used for transferring the concavo-convex pattern onto an imprint resist layer formed on magnetic recording medium substrate, with the concavo-convex pattern of the imprint mold structure being pressed against the imprint resist layer, wherein the shape of a vertical cross-section of the concavo-convex pattern taken on a line having a direction perpendicular to the direction in which the convex portion extends satisfies the following three Mathematical Expressions: (Mathematical Expression 1) 40°??<90°, (Mathematical Expression 2) SRas>SRab, (Mathematical Expression 3) LRah>LRav.

Abstract: A production method for a magnetic recording medium including forming thin films on a substrate using a sputtering method with a target, wherein the target on which an annular-shaped erosion area is formed during sputtering and a substrate holder on which a plurality of substrates are mounted are installed, opposed in parallel, in a manner such that center axes of the target and the substrate holder align with each other, and the substrates are mounted on the substrate holder in positions such that R3/R1 is 1.1 or smaller and R4 is R2 or greater to form thin films.

Abstract: Disclosed is a film dispersed of carbon nanotubes that emits intensive light with a particular wavelength. The film dispersed of carbon nanotubes 4 according to the present invention is a film in which a plurality of carbon nanotubes 3, 3, . . . are dispersed in the film dispersed of carbon nanotubes, and each carbon nanotube 3 is dispersed isolatedly in an oriented manner.

Abstract: A magnetoresistive medium (1) includes a substrate (2) which has been treated to provide a miscut vicinal surface (3) in the form of terraces (4) and steps (5) of atomic and nanometer scale. There are discrete separated spacer nanowires (7) provided by an intermediate partial spacer film on each terrace (4) against each step (5). A further main film (11) provides main nanowires (10(a), 10(b)). A thin protective layer (15) covers the main nanowires (10(a), 10(b)) which form two separate subsets of main nanowires with different exchange interaction with the substrate and thus a different response to an external magnetic field. In use, when an external magnetic field (H) is applied the response of the main nanowires (10(a), 10(b)) changes as the exchange coupling with the substrate (2) varies and the magnetisation on the main nanowires (10(a), 10(b)) change. This is shown by the arrows while prior to the application of the external magnetic field, they might, for example, be aligned.

Abstract: The invention relates to a sputtering target which has a fine uniform equiaxed grain structure of less than 44 microns, no preferred texture orientation as measured by electron back scattered diffraction (“EBSD”) and that displays no grain size banding or texture banding throughout the body of the target. The invention relates a sputtering target with a lenticular or flattened grain structure, no preferred texture orientation as measured by EBSD and that displays no grain size or texture banding throughout the body of the target and where the target has a layered structure incorporating a layer of the sputtering material and at least one additional layer at the backing plate interface, said layer has a coefficient of thermal expansion (“CTE”) value between the CTE of the backing plate and the CTE of the layer of sputtering material. The invention also relates to thin films and their use of using the sputtering target and other applications, such as coatings, solar devices, semiconductor devices etc.

Abstract: The present invention relates to a thin-film device including a thin-film element and a lead conductor film. The thin-film element and the lead conductor film are embedded in an insulating film. The lead conductor film has a terminal area at one end thereof, is connected to the thin-film element at the other end thereof, and between the one end and the other end, has an increased surface area portion whose volume is partially occupied by an insulating material to increase surface area. As a result, there is provided a high frequency thin-film device capable of reducing loss and heat generation due to skin effect, particularly a thin-film magnetic head.

Abstract: A magnetic recording medium includes at least a disk substrate, a magnetic recording layer formed with a predetermined concavo-convex pattern on the disk substrate, and a non-magnetic layer formed in concave portions of the concavo-convex pattern. Convex shapes made of a non-magnetic material are formed on the magnetic recording layer or the non-magnetic layer. Each convex shape is formed, for example, into a mountain-like shape whose upper surface width is made smaller than a width of each convex portion of the magnetic recording layer or a width of each concave portion where the non-magnetic layer 6 is formed.

Abstract: A polymer thin film in which cylindrical phases are distributed in a continuous phase and are oriented in a pass-through-direction of the film includes at least: a first block copolymer including at least a block chain A1, as a component of the continuous phase, composed of polymerized monomers a1, and a block chain B1, as a component of the cylindrical phases, composed of polymerized monomers b1; and a second block copolymer including at least a block chain A2, as a component of the continuous phase, composed of polymerized monomers a2, and a block chain B2, as a component of the cylindrical phases, composed of polymerized monomers b2, with the second copolymer having a degree of polymerization different from that of the first copolymer. A film thickness of the polymer thin film and an average center distance between adjacent cylindrical phases have a relation represented by a predetermined expression.

Abstract: Provided is a magnetic anisotropy multilayer including a plurality of CoFeSiB/Pt layers used in a magnetic random access memory. The magnetic anisotropy multilayer includes a first Pt/CoFeSiB layer, and a second Pt/CoFeSiB layer formed on the first Pt/CoFeSiB layer.

Abstract: A thin-film forming method and a thin-film forming apparatus can suppress the oxidization of a magnetic layer composed of a non-oxide material when a film of oxide is formed on the magnetic layer by sputtering that is suited to mass production. A multilayer film with a low RA value can be produced by such method and apparatus. A thin-film forming method that forms a thin film of oxide on the surface of a substrate by dispersing the oxide inside a chamber includes an enclosing step of enclosing the substrate in the chamber and an adsorbing step of adsorbing excess oxygen present inside the chamber by providing an adsorption unit, which adsorbs oxygen, inside the chamber.

Abstract: A master carrier for magnetic transfer having a data region and a servo pattern region that has a pattern of fine projections arrayed in the track direction thereof in accordance with the preformat signal information to be transferred onto an in-plane magnetic recording medium is disclosed. The data region has a projection formed of a material such as carbon-based material that differs from the material of the servo pattern region.

Abstract: A perpendicular magnetic recording media substrate, suitable for magnetic recording media using the perpendicular magnetic recording method, is disclosed. Texturing is used to polish the substrate. A polishing tape is pressed against a substrate, while a polishing slurry comprising abrasive particles is supplied onto the substrate for perpendicular magnetic recording media while it is rotated, to perform texturing of the substrate. The average fiber diameter of polishing fibers contained in the polishing tape is 400 nm or less, and the average particle diameter of abrasive particles contained in the polishing slurry is 150 nm or less.

Abstract: A magnetic recording medium has a disk-shaped glass substrate less than or equal to 1 inch (27.4 mm) in diameter, wherein a ratio (t2/d) of a square of the thickness t (mm) to a diameter d (mm) is greater than or equal to 0.007. A deformation of the magnetic recording medium that occurs when it is mounted in the magnetic recording device and clamped can be made small. Therefore, the flying of the magnetic head can be made stable.

Abstract: A method of performing data/information recording and retrieval utilizing a multilevel patterned magnetic medium, comprises: (a) providing a magnetic recording system including a read/write head and a multilevel patterned magnetic recording medium including a plurality of spaced apart elements each comprising a stacked plurality n of magnetic recording cells with different magnetic properties and magnetically decoupled from overlying and/or underlying cells; (b) providing relative movement between the write head and magnetic recording medium; and; (c) writing to the medium by supplying the write head with a modulated write current comprising a plurality n of pulses of different magnitudes while the head moves past each element, thereby applying n different magnetic field strengths to each element, the write current including a first pulse of magnitude sufficient to write to a first cell of each element having a highest magnetic coercivity of said cells, and n?1 succeeding pulses of progressively smaller magni

Abstract: A bit patterned magnetic recording medium, comprises a non-magnetic substrate having a surface; a plurality of spaced apart magnetic elements on the surface, each of the elements constituting a discrete magnetic domain or bit; and a layer of a ferromagnetic material for regulating magnetic exchange coupling between said magnetic elements. The layer has a saturation magnetization Ms ranging from about 1 to about 2,000 emu/cm3, preferably below about 400 emu/cm3, more preferably below about 200 emu/cm3, and may overlie, underlie, or at least partially fill spaces between adjacent magnetic elements.

Abstract: A granular perpendicular magnetic recording medium, comprising: (a) a non-magnetic substrate having a surface; and (b) a layer stack on the substrate surface, the layer stack including a granular perpendicular magnetic recording layer formed by: (1) reactively sputtering a target comprised of a magnetic alloy in an atmosphere containing at least one ionized oxygen species derived from a source gas comprised of a compound of oxygen and at least one other non-metallic element; and (2) oxidizing an exposed upper surface of the granular perpendicular magnetic recording layer by generating a plasma containing at least one ionized oxygen species derived from a source gas comprised of a compound of oxygen and at least one other non-metallic element and treating the exposed upper surface of the granular perpendicular magnetic recording layer with the plasma.

Abstract: An embodiment of the present invention is a technique to fabricate a device using a magnetic layer. A magnetic layer having granular magnetic particles is formed. A planar insulating layer is deposited on the magnetic layer. The planar insulating layer has a planar surface and is made of a polymeric dielectric material with gap-filling capability to fill in gaps among the granular magnetic particles.

Abstract: A bit patterned magnetic recording medium comprises a substrate having a surface, and a plurality of spaced apart magnetic elements on the surface, each element constituting a discrete magnetic domain or bit of the same structure and comprised of a stack of thin film layers including in order from the substrate surface: a seed layer; and a perpendicular magnetic recording layer in contact with a surface of the seed layer and comprising a Co1-x-yPtxCry alloy material, where 0.05?x?0.35 and 0?y?0.15. The Co1-x-yPtxCry alloy material has a first order magnetic anisotropy constant K, up to about 2×107 erg/cm3, a saturation magnetization Ms up to about 1200 emu/cm3, an anisotropy field HK=2K1/Ms up to about 35 kOe, a hexagonal (0001) crystal structure with c-axis perpendicular to a surface thereof, and an X-Ray diffraction (XRD) rocking curve with a full width at half maximum (FWHM) of ˜5° or less.

Abstract: A data storage medium for perpendicular recording has a substrate and a ferromagnetic layer on the substrate for storing data bits. The ferromagnetic layer has a plurality of elongate grains of magnetizable material extending perpendicular to the substrate which form magnetic domains representative of data. Each magnetic domain is separated from adjacent magnetic domains by a bit edge domain wall region. Each elongate grain has a perpendicular height that is greater than a width of the bit edge domain wall region.

Abstract: A magnetic recording medium comprising a substrate and a magnetic layer containing ferromagnetic metal powder and a binder, wherein the ferromagnetic metal powder contains iron, cobalt and form 2 to 20 atom % of yttrium based on a total of iron and cobalt contained in the ferromagnetic metal powder and has an average length of 50 nm or smaller, and the magnetic recording medium has a test value of at least 100 passes in a magnetoresistive head resistance reduction test performed as defined herein.

Abstract: A master for magnetic transfer is made which comprises a substrate which has on a surface thereof a convex area and a concave area corresponding to servo information and which is constituted of a soft magnetic, and a ferromagnetic which is provided in the concave portion of the substrate, which has a coercive force larger than the external magnetic field for reversing the direction of magnetization of the vertical recording medium, and which has magnetization in a direction opposite to the direction of the external magnetic field.

Abstract: A patterned medium and a method of manufacturing the same are provided. The patterned medium includes a data region having a plurality of recording dots arrayed along a plurality of tracks; and a non-data region comprising a part of the patterned medium other than the data region, the non-data region having a plurality of pattern marks. The method includes depositing an aluminum layer on a base substrate; depositing a photo-resist on the aluminum layer; forming a pattern on the photo-resist using a lithography process; forming a fine pattern by forming a plurality of cavities on a portion of the aluminum layer which is exposed through the photo-resist; removing the photo-resist; forming a mold pattern; imprinting the mold pattern on a media substrate to form cavities on the media substrate; and filling the cavities with a recording material.

Abstract: An apparatus, system, and method are disclosed for utilizing a “shadow mask” approach to fabricate servo patterns on high density patterned media. The apparatus may include a deposition mask having a plurality of apertures generated by a conventional lithographic process. Material may be deposited onto a substrate through the deposition mask apertures from at least one deposition source oriented at unique deposition angles. In this manner, each aperture may correspond to multiple deposition locations. Apertures may be precisely dimensioned and positioned to create servo pattern features from the resulting deposition locations. The deposition mask may also include a plurality of bit pattern apertures adapted to direct a material to a plurality of deposition locations on the substrate, the deposition locations forming a bit pattern concurrent with formation of a servo pattern.

Abstract: A magnetic recording device including a longitudinal magnetic recording medium. The longitudinal magnetic recording medium includes a magnetically soft underlayer disposed under a longitudinal recording layer. A perpendicular write head is utilized to write data to the longitudinal magnetic recording medium wherein the longitudinal recording layer is disposed within an effective write gap formed by the perpendicular write head and the underlayer. The longitudinal component of the perpendicular write head is sufficient to switch the magnetic grains in the recording layer in the presence of the perpendicular field. The magnetic recording medium can have a high areal density and improved magnetic properties.

Abstract: An information storage medium with an array of laterally magnetized dots, as well as a process for producing this medium is disclosed. Each dot (2) contains at least one magnetic domain formed by a thin layer (4) of at least a magnetic material laterally covering this flat material and deposited at oblique incidence relative to the normal (z) to the plane (6) of the array. The invention applies in particular to computer hard drives.

Abstract: The present invention provides a master disk that can easily be brought into contact with and separated from a magnetic recording medium, and can accommodate foreign matters. This master disk transfers a predetermined magnetic pattern onto a magnetic recording medium that can record magnetic information. In the master disk, there are a magnetic pattern formation region in which the magnetic pattern is formed, and a blank region in which the magnetic pattern is not formed. A concave portion for accommodating foreign matters is formed in at least one part of the blank region.

Abstract: A master information carrier has on its surface an irregularity pattern representing information to be magnetically transferred to a magnetic recording medium held in contact with the surface of the master information carrier. The parts of the surface of the master information carrier which is brought into contact with the magnetic recording medium are in the range of 0.3 nm to 10.0 nm in center plane mean surface roughness SRa.

Abstract: A master information carrier for magnetic transfer to an in-plane magnetic recording medium includes a base sheet having an irregularity pattern representing information to be transferred to an in-plane magnetic recording medium and a magnetic layer formed along the irregularity pattern. The thickness da1 of the magnetic layer on the upper surface of a protruding portion of the irregularity pattern and the thickness da2 of the magnetic layer on each of the side surfaces of the protruding portion satisfy the following condition, 0.05<da2/da1?1.3.

Abstract: A method of manufacturing a magnetic recording medium comprises steps of providing a non-magnetic substrate for a magnetic recording medium, the substrate including at least one major surface; forming a layer of a sol-gel on the at least one major surface; forming a pattern, e.g., a servo pattern in an exposed surface of the layer of said sol-gel; and converting the layer of sol-gel to a glass or glass-like layer while preserving the pattern in an exposed surface of said glass or glass-like layer. Embodiments of the invention include magnetic media including a patterned glass or glass-like layer formed from a layer of a hydrophilic sol-gel with the pattern embossed therein by means of a stamper having a hydrophilic surface including a negative image of the pattern.