63 results about "Magnetic dots" patented technology

A magnetic recording medium has a recording layer (42) formed over the substrate. The recording layer is structured by a nonmagnetic base, and a plurality of magnetic dots formed in the nonmagnetic base. The magnetic dots are aligned in a prescribed direction in each track or each group of adjacent tracks of the magnetic recording medium. In a preferred example, the magnetic dots align in a direction tilting at a prescribed angle with respect to the width of the track.

According to one embodiment, there is provided a magnetic disk apparatus having a magnetic disk having magnetic dot lines each including magnetic dots arrayed at equal intervals in a down track direction, and a read / write head which uses a plurality of adjacent magnetic dot lines as one track and sequentially performs read and write on the magnetic dots included in the magnetic dot lines constituting the track, in which the magnetic dots included in each of the magnetic dot lines in each track of the magnetic disk are displaced in the down track direction from the magnetic dots included in the adjacent dot line in the track depending on a possible skew angle between the read / write head and the track so that the magnetic dots are sequentially accessed by the read / write head.

A perpendicular magnetic recording medium has a substrate, a soft magnetic underlayer formed on the substrate, arrayed soft magnetic dots formed on the soft magnetic underlayer, and a ferromagnetic recording layer formed on the soft magnetic dots and having magnetic anisotropy in a direction perpendicular to a surface of the substrate.

According to one embodiment, there is provided a magnetic recording medium having a data region in which a plurality of recording tracks, each including magnetic dots arrayed in a down-track direction with a pitch p, are formed in a cross-track direction, and a servo region including a preamble in which a plurality of lines of magnetic dots, which are arrayed in a cross-track direction with a pitch p, are formed at equal intervals in the down-track direction.

A UNLV novel electric / magnetic dot sensor comprises: a loop of conductor having two ends to the loop, a first end and a second end; the first end of the conductor seamlessly secured to a first conductor within a first sheath; the second end of the conductor seamlessly secured to a second conductor within a second sheath; and the first sheath and the second sheath positioned adjacent each other. The UNLV novel sensor can be made by removing outer layers in a segment of coaxial cable, leaving a continuous link of essentially uncovered conductor between two coaxial cable legs.

A magnetic recording medium having magnetic dots that can achieve high density recording is disclosed. The magnetic recording medium comprises at least an underlayer, a magnetic recording layer, and a protective layer sequentially laminated on a nonmagnetic substrate. The underlayer is composed of ruthenium or an alloy of mainly ruthenium and has an undulating structure formed with ridge lines in a predetermined pitch on the surface of the underlayer. The magnetic recording layer contains at least ferromagnetic crystal grains and a nonmagnetic component. Magnetic dots composed of crystal grains with a grain size not smaller than 4 nm in the magnetic recording layer are aligned on a surface of the underlayer along the ridge line, and each of the magnetic dots s separated by the nonmagnetic component from each other. A simple manufacturing method for this medium also is disclosed.

A bit patterned media (BPM) includes many magnetic dots arranged in tracks on a substrate. The magnetic dots each have a hard magnetic core, a soft magnetic cladding surrounding the core and a thin non-magnetic layer that separates the hard magnetic core from the soft magnetic ring. The soft magnetic cladding stabilizes the magnetization at the edges of the hard magnetic core to improve the signal to noise ratio of the magnetic dots. The soft magnetic rings also narrow the magnetic field of the dots which reduces the space requirements and allows more dots to be placed on the substrate.

A magnetic thin film structure, a magnetic recording medium including the same, and a method of manufacturing the magnetic recording medium are provided. The magnetic recording medium includes an under layer formed of a transition metal nitride on a substrate and a plurality of magnetic dots, which are unit recording regions, formed of a magnetic material having magnetic anisotropy energy between 106 erg / cc and 108 erg / cc.

A bit patterned media (BPM) includes many magnetic dots arranged in tracks on a substrate. The magnetic dots each have a hard magnetic core, a soft magnetic cladding surrounding the core and a thin non-magnetic layer that separates the hard magnetic core from the soft magnetic ring. The soft magnetic cladding stabilizes the magnetization at the edges of the hard magnetic core to improve the signal to noise ratio of the magnetic dots. The soft magnetic rings also narrow the magnetic field of the dots which reduces the space requirements and allows more dots to be placed on the substrate.

A perpendicular magnetic recording medium has a substrate, a soft magnetic underlayer formed on the substrate, arrayed soft magnetic dots formed on the soft magnetic underlayer, and a ferromagnetic recording layer formed on the soft magnetic dots and having magnetic anisotropy in a direction perpendicular to a surface of the substrate.

A process for fabricating a patterned medium including a dot-forming step for forming a dot array constituted by sample magnetic dots having a predetermined size such as a single domain particle size determined theoretically from the magnetic metal thin for a sample medium having a magnetic metal film formed with the initial conditions; a demagnetization step for AC-demagnetizing the dot array; a ratio measurement step for measuring the ratio of single magnetic domains by observing the magnetic pattern of each of the sample dots after the AC-demagnetization; and an adjustment step for determining conditions of the sputtering apparatus for forming a solid state magnetic metal thin film by adjusting the film-forming conditions such that the ratio of the single magnetic domains equals to or exceeds a predetermined value.

Provided are a magnetic recording medium and a method of fabricating the same. The magnetic recording medium includes a substrate; and a recording layer, wherein the recording layer is formed of a plurality of magnetic dots, and a non-magnetic region that is formed on the substrate to isolate each of the magnetic dot.

It is an object to provide a simple method capable of producing a magnetic storage medium, a magnetic storage medium and an information storage device which may be produced by a simple production method with a high recording density, and a magnetic disk is produced by a production method having: a film-forming process of forming, on a substrate 61, a magnetic film made of a Co—Cr—Pt alloy and having a thickness of less than 10 nm; and an ion injection process of forming, by reducing saturation magnetization by locally injecting ions into a point other than plural points that become magnetic dots on each of which information is magnetically recorded, a between-dot separator having saturation magnetization smaller than saturation magnetization of the magnetic dots, between the magnetic dots.

The invention discloses a self-netting type scattered-point internal vibration ball for concrete pouring, and belongs to the field of construction technology. The self-netting type scattered-point internal vibration ball can be put in a concrete pouring process so as to replace the traditional concrete vibrator for concrete pouring without actual operation by technicians at a site. Compared with aconcrete vibrator, the self-netting type scattered-point internal vibration ball is in the concrete, and high-quality vibration is carried out to the concrete by moisture in the concrete and the high-frequency vibration caused by the decomposing reaction of a water disintegration vibration ball; meanwhile, a large number of tiny bubbles can be released during the disintegration, the tiny bubblescan be used as an air-entraining agent to improve the peaceability, water-retaining property and cohesiveness of a concrete mixture and improve the flowability of the concrete, and after the vibrationis finished, the tiny bubbles can extend in the concrete by a released self-hardening netting vibration transmission rod; and a high-strength adhesion is established by a double magnetic dot ball, areinforcing net is formed in the concrete, and the forming strength of the concrete is significantly improved through cooperating with an internal vibration sphere.

According to one embodiment, there is provided a magnetic recording medium having a data region in which a plurality of recording tracks, each including magnetic dots arrayed in a down-track direction with a pitch p, are formed in a cross-track direction, and a servo region including a preamble in which a plurality of lines of magnetic dots, which are arrayed in a cross-track direction with a pitch p, are formed at equal intervals in the down-track direction.

A UNLV novel electric / magnetic dot sensor includes a loop of conductor having two ends to the loop, a first end and a second end; the first end of the conductor seamlessly secured to a first conductor within a first sheath; the second end of the conductor seamlessly secured to a second conductor within a second sheath; and the first sheath and the second sheath positioned adjacent each other. The UNLV novel sensor can be made by removing outer layers in a segment of coaxial cable, leaving a continuous link of essentially uncovered conductor between two coaxial cable legs.

Aimed at is to match a timing of a clock signal with a magnetic dot of a patterned medium. A magnetic part arraying magnetic dots for recording a magnetic signal at certain intervals and a nonmagnetic part not recording a magnetic signal are featured in the patterned medium. A position of the nonmagnetic part not recording a magnetic signal is detected by a magnetic head and a clock signal is synchronized with a detection signal of the nonmagnetic part.

A digitized encryption method for a fiber paper making process based on dot patterns comprises the following steps: adding magnetic fiber during a pulping process, and utilizing a magnetic dot code controller to control dot codes to act on the magnetic fiber in pulp during a pulp flowing process, so as to form magnetic dot patterns in paper, wherein the magnetic dot code controller is arranged above a mesh part, and comprises an input module, a conversion module, a storage module and a processing module; the input module and the conversion module are connected with each other, so as to input the dot patterns; the conversion module and the storage module are connected with each other to convert the input dot patterns into 16 * 16 dot data; and the processing module and the storage module are connected with each other to control the magnetic property of corresponding dots on the magnetic dot code controller. According to the invention, the interior of the paper is encrypted magnetically during a paper making process, so that people cannot see the interior of the paper visually, and scanning and duplication are avoided; and stored information is converted into dot codes during the encryption process, so that the data can be stored in the paper.

According to one embodiment, there is provided a magnetic disk apparatus having a magnetic disk having magnetic dot lines each including magnetic dots arrayed at equal intervals in a down track direction, and a read / write head which uses a plurality of adjacent magnetic dot lines as one track and sequentially performs read and write on the magnetic dots included in the magnetic dot lines constituting the track, in which the magnetic dots included in each of the magnetic dot lines in each track of the magnetic disk are displaced in the down track direction from the magnetic dots included in the adjacent dot line in the track depending on a possible skew angle between the read / write head and the track so that the magnetic dots are sequentially accessed by the read / write head.

According to one embodiment, a disk drive that effectively corrects data errors, which are changes in the total number of data bits at the time of reproducing the data. The disk drive has a disk and a disk controller. The disk has a data-recording area constituted by a set of magnetic dots that are physically separated from one another. The disk controller uses error-correcting codes, determining an error that shows a change in the total number of bits in a data-bit string of the data set reproduced.

Provided is a simulation method for paper digitized information embedding, used to solve a virtual modeling problem of existing fiber finished paper encryption paper. Unigraphics NX is used in the simulation method for virtual product modeling of digitized paper, to satisfy design concept of the digitized paper to the largest extent. The method is mainly aimed at simulation for fiber finished paper encryption paper based on bit-mapped images. Through Unigraphics NX, a 3D paper model is firstly formed. Since the bit-mapped image is regular fiber interlacing formed by spiral air flow, or is formed by a magnetic dot-matrix encoding controller acting on magnetic fibers, so encrypted images and characters need to be loaded in paper by an embedding method, and then realization rendering is performed. Encrypted paper would be displayed as a simulation crack image through fiber scanning or magnetic powder covering. In an early stage of information embedding, the method improves paper quality by using simulation performance of software, and time-consuming and effort-consuming construction on a papermaking device and an encryption device model machine in practice is reduced.

The invention provides a magnetic stripe positioning method and device. According to the invention, each channel of a paper note is divided into a plurality of sub channels. Magnetic data contained byeach sub channel is acquired and magnetic dots contained by each sub channel are then acquired. Sub channels whose magnetic dot number is greater than a first preset value are determined as target sub channels. Channels whose target sub channel number is greater than a second preset value are determined as magnetic strip channels, wherein the target sub channels are continuous in position. A method of determining channels having the largest magnetic dot number as the magnetic strip channel directly is rejected, so that magnetic noise and interference caused by serial number areas of paper notes are eliminated. Therefore, accurate positioning of paper note magnetic strips is realized.

According to one embodiment, a media access method includes a head scanning each track of a magnetic recording medium while tilting with respect to a direction perpendicular to the track direction at all positions including a position with a skew angle of zero on the magnetic recording medium. The track includes at least one magnetic dot array. The core width of the head is set with respect to a pitch of magnetic dots in the track direction and a pitch in the direction perpendicular to the track direction so that the head does not simultaneously scan a plurality of magnetic dots while scanning one track.

A patterned magnetic recording medium, accessible by a magnetic recording head, including a plurality of tracks, a width direction of each track and that of the magnetic recording head being of a skew angle. The patterned magnetic recording medium includes a plurality of magnetic dots, each corresponding to a recording bit, formed on a non-magnetic material. The plurality of magnetic dots are arranged in a plurality of arrays, each array corresponding to one of the tracks. Every N adjacent magnetic dots of the array define a polygon, one side thereof being parallel to the corresponding track, and another side thereof being parallel to a direction corresponding to the skew angle of the corresponding track.

Aimed at is to match a timing of a clock signal with a magnetic dot of a patterned medium. A magnetic part (16) arraying magnetic dots (15) for recording a magnetic signal at certain intervals and a nonmagnetic part (17) not recording a magnetic signal are featured in the patterned medium. A position of the nonmagnetic part(17) not recording a magnetic signal is detected by a magnetic head and a clock signal is synchronized with a detection signal of the nonmagnetic part.

According to one embodiment, a disk drive that includes a disk and a disk controller is provided which effectively correct data errors that are generated at the time of reproducing data. The disk has a data-recording area constituted by a set of magnetic dots that are physically separated from one another. The disk controller uses error-correcting codes to determine an error that shows a change in the total number of bits in a data-bit string of the data set reproduced.

A patterned media type magnetic storage medium has separated magnetic dots formed a data area having a first magnetic dots and a servo area. The micro position detection portion in the servo area is constructed with first and second dot arrays having a different number of second magnetic dots in the circumference direction and face with the center line that the first magnetic dots of the data area in the magnetic storage medium are disposed, as the axis. The area of the magnetic dot constituting the micro position detection portion of the servo area is small, so the coercive force of the servo area increases. The frequency is changed depending on the number of magnetic dots, and the phase is changed depending on the position of the magnetic dot array in the radius direction with the center line as an axis.

A patterned magnetic recording medium, accessible by a magnetic recording head, including a plurality of tracks, a width direction of each track and that of the magnetic recording head being of a skew angle. The patterned magnetic recording medium includes a plurality of magnetic dots, each corresponding to a recording bit, formed on a non-magnetic material. The plurality of magnetic dots are arranged in a plurality of arrays, each array corresponding to one of the tracks. Every N adjacent magnetic dots of the array define a polygon, one side thereof being parallel to the corresponding track, and another side thereof being parallel to a direction corresponding to the skew angle of the corresponding track.