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7602566 |
Magnetic transfer master and method of formatting magnetic recording medium
A master is used for writing information to a magnetic recording disk by a magnetic transfer method. The recording disk includes a magnetic recording layer possessing vertical magnetic anisotropy....
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7593175 |
Magnetic transfer method, magnetic transfer apparatus, magnetic recording medium and magnetic record reproduction system
A magnetic transfer method comprises the processes of: adhering a side having a perpendicular magnetic recording layer of a perpendicular magnetic recording medium in which a perpendicular magnetic...
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7573663 |
Master carrier for magnetic transfer, magnetic transfer apparatus, and magnetic transfer method
A master for magnetic transfer is provided that obtains favorable close contact with a slave medium, is capable of good positioning therewith, and prevents positional misalignment, damage, and...
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7572499 |
Contact magnetic transfer template
A contact magnetic transfer (CMT) master template has a flexible plastic film with a planarized top or upper surface containing magnetic islands separated from one another by nonmagnetic regions....
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7532420 |
Master disk for magnetic transfer, magnetic recording medium and magnetic recording apparatus
The present invention provides a master disk for magnetic transfer which has a disk-like outer shape and in the surface of which a large number of fine magnetic layer patterns are formed, wherein...
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7522362 |
Amplitude servo pattern, magnetic recording medium and the manufacturing method, patterned magnetic transfer master substrate used in the manufacturing method, and magnetic recording/reproducing apparatus
An amplitude servo pattern capable of providing accurate servo control through reproduced amplitude with reduced noise is provided. The amplitude servo pattern has servo burst signals composed of...
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7502184 |
Method of magnetic transfer and stopping slave medium rotation
When magnetically transferring information represented by a pattern of magnetic layer formed on a master information carrier to a disc-like slave medium, an initial DC magnetic field is applied to...
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7477464 |
Manufacturing method of recording medium, electric/magnetic field copy master and electric/magnetic field copying device
When copying servo information from an electro-magnetic field copy master to a vertical storage medium, the magnetization direction of the vertical storage medium is made to the direction the...
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7477463 |
Master information carrier for magnetic transfer
A master information carrier has on its surface a signal area where an embossed pattern formed by protruding portions and recessed portions and representing a signal pattern to be transferred has...
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7460322 |
Magnetic transferring apparatus
A magnetic transferring apparatus allows attachment of a first magnet to a first holder. A second magnet is attached to a second holder. The first and second holders are located in a space between...
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7440207 |
Magnetic-transfer method, magnetic recording medium, and magnetic recording device
Provided is a method of magnetic transfer. The method includes initially DC-magnetizing a transfer-recipient disc in a circumferential direction, by applying a magnetic field to the...
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7420757 |
Method and apparatus for magnetic transfer
A magnetic transfer wherein the exchange of master mediums is made easy to perform is provided, whereby the operational efficiency and transfer efficiency are improved, leading to an overall...
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7385774 |
Master information carrier for magnetic transfer, magnetic transfer method, and magnetic recording medium
A master information carrier for magnetic transfer bears uneven signal patterns on its surface. When the minimum bit length in the uneven signal patterns is B min , dummy uneven patterns are...
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7382558 |
Magnetic transfer apparatus
By bring a master carrier and a slave medium into close contact with uniform force when executing magnetic transfer by applying transfer magnetic field in the state that the master carrier and...
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7369337 |
Magnetic field application apparatus, magnetic transfer apparatus and method for producing magnetic recording medium
A magnetic field application apparatus includes a pair of magnetic field application means, each of which is arranged, at least during application of a magnetic field, on either side of a magnetic...
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7369336 |
Master carrier for magnetic transfer
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...
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7365926 |
Signal processing method of magnetic recording medium and magnetic record reproduction apparatus
When signals are read out by a magnetic head from a magnetic recording medium on which magnetic bits corresponding to information are recorded along the tracks thereof by a magnetic transfer...
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7362524 |
Magnetic pattern transfer method
A magnetic pattern transfer method is disclosed. A magnetic pattern transfer master having a plurality of magnetic portions preformed with predetermined magnetic patterns is brought in proximity to...
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7312940 |
Magnetic transfer apparatus
A magnetic transfer apparatus is provided with a transfer holder. A master information carrier and a slave medium are accommodated in the transfer holder in an overlapping state where they are...
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7301714 |
Method and apparatus for magnetic transfer, and magnetic recording medium
A magnetic pattern, in which errors due to sub-pulses do not occur during signal reproduction, is transferred from a magnetic transfer master carrier. A magnetic field is applied to a conjoined...
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7296478 |
Master carrier for magnetic transfer, inspecting method thereof, and magnetic recording medium producing method
In a master carrier for magnetic transfer which comprises a support that has a transfer-recording pattern arrayed in the track direction thereof in accordance with the information to be transferred...
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7218466 |
Contact printing of magnetic media with mechanically reinforced and/or gas venting stamper
An apparatus for performing contact printing of a magnetic transition pattern in a magnetic recording medium, comprising:
(a) a stamper/imprinter including a body formed of at least one...
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7218465 |
Magnetic media patterning via contact printing utilizing stamper having magnetic pattern formed in non-magnetic substrate
A stamper/imprinter for use in forming a magnetic transition pattern in a magnetic material by means of contact printing, comprising: (a) a non-magnetic substrate having a major surface comprising...
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7203014 |
Preformat method for magnetic recording medium, magnetic recording medium, and magnetic recording and reproducing apparatus
The magnetic recording and reproducing apparatus reads a transfer clock synchronized with servo information and records a write-once clock pattern in a state where 0 is set as a delay time of the...
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7199953 |
Magnetic transfer master medium, magnetic transfer method, and magnetic transfer master medium forming method
A favorable magnetic transfer is performed to a perpendicular magnetic recording medium. A master medium is provided with a substrate on the surface of which protrusion portions, which form a...
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7193796 |
Patterned master carrier for magnetic transfer, manufacturing method thereof, magnetic transfer method, recording medium, and magnetic recording and reproduction apparatus
A patterned master carrier for magnetic transfer is used to transfer a magnetization pattern, which does not cause a problem such as an error attributable to a subpulse upon signal reproduction, to...
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7187510 |
Method of magnetic transfer to flexible medium
A signal such as a servo tracking signal is recorded on a flexible slave medium by magnetic transfer. When forming the flexible slave medium of a magnetic strip in a continuous length, the signal...
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7170699 |
Master disk having grooves of different depths for magnetic printing and manufacturing method therefor
A master disk has an aspect ratio of a width of a groove to a depth thereof to facilitate embedding of a soft magnetic film in the groove for stabilizing magnetic printability. The master disk has...
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7149042 |
Master carrier for magnetic transfer
A master carrier for magnetic transfer is equipped with a substrate having a land/groove pattern. The land/groove pattern is formed from a magnetic material and corresponds to information that is...
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7139140 |
Method and apparatus of magnetically transferring information signal from master medium to slave medium
When executing a magnetic transfer by bringing a master medium and a slave medium into close contact with each other and applying a transferring magnetic field, a permitted limit of the application...
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7126783 |
Disk drive apparatus, servo control circuit, method of manufacturing recording medium, magnetic recording medium, and method of checking recording medium
A disk drive apparatus that performs a positioning of a head based on servo information recorded on a recording medium includes a servo control unit that performs a servo control based on a set of...
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7119973 |
Magnetic transfer apparatus
A magnetic transfer apparatus magnetically transfers information carried by a master information carrier to a slave medium held in close contact with the master information carrier by a holder...
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7110201 |
Master medium for magnetic transfer and magnetic disk and magnetic disk drive
A master medium is utilized in a magnetic transfer apparatus. The master medium is superposed on a blank magnetic medium. A predetermined magnetic field is then applied to the master medium. The...
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7110196 |
Magnetic transfer method and apparatus
A favorable magnetic transfer is performed on a vertical magnetic recording medium. A permanent magnet apparatus employs a transfer magnetic field generating means provided with two columnar...
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7106531 |
Method of forming a servo pattern on a rigid magnetic recording disk
A contact magnetic transfer (CMT) method for forming a magnetic pattern, such as the servo pattern on a magnetic recording disk, uses a master template with antiferromagnetically-coupled...
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7099094 |
Magnetic pattern transferring method for performing a magnetic pattern transfer
A method for manufacturing a master used for a magnetic transfer, the method including the following steps: A first-master manufacturing step of manufacturing a first master including a...
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7094484 |
Master carrier for magnetic transfer, inspecting method thereof, and magnetic recording medium producing method
In a master carrier for magnetic transfer which comprises a support that has a transfer-recording pattern arrayed in the track direction thereof in accordance with the information to be transferred...
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7094481 |
Master information carrier for magnetic transfer and magnetic transfer method
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...
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7089353 |
Radial self-propagation pattern generation for disk file servowriting
A method for writing a servopattern comprises writing a first burst at a first radial position, writing a second burst at a second radial position, wherein an edge of the first burst and an edge of...
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7079335 |
Magnetic transfer method and apparatus
A favorable magnetic transfer is, performed on a perpendicular magnetic recording medium. A permanent magnet apparatus provided with two permanent magnets, each having a width extending the length...
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7061703 |
Master information carrier and method for manufacturing magnetic disc using the same
A master information carrier capable of manufacturing a magnetic recording medium in which a preformat recording of information signals causing no reproduction signal detection errors arising from...
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7061702 |
Master disk device for transferring magnetic patterns to both sides of a magnetic recording medium, and alignment device therefor and alignment method thereof
To enable alignment of a magnetic pattern of a pair of master disks and a magnetic recording medium, each of the master disks has at least a pair of alignment marks disposed outside the region of...
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7054082 |
Magnetic transfer method for a high-density magnetic recording medium
An accurate magnetic transfer to a high-density slave medium having two magnetic layers and utilizing antiferromagnetic coupling is performed. By applying a first magnetic field that causes both...
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7054081 |
Magnetic transfer apparatus
By bring a master carrier and a slave medium into close contact with uniform force when executing magnetic transfer by applying transfer magnetic field in the state that the master carrier and...
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7054080 |
Magnetic transfer apparatus
By bring a master carrier and a slave medium into close contact with uniform force when executing magnetic transfer by applying transfer magnetic field in the state that the master carrier and...
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7050248 |
Method and apparatus for patterning magnetic media by contact printing
An apparatus for forming a magnetic transition pattern in a magnetic material by contact printing, comprising:
(a) a stamper having an imprinting surface comprising a plurality of...
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7019925 |
Variable frequency chevron in printed media reference pattern to improve servo demodulation
Reference patterns in accordance with the present invention can include variable frequency chevrons incorporated into a reference pattern on a printed media surface to improve servo demodulation....
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7012770 |
Magnetic transfer apparatus and method for magnetic recording medium
A magnetic pattern of a master disc is transferred to both sides of a magnetic recording medium with no displacement. The origin of a magnetic recording medium can be determined by observing the...
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6994029 |
Magnetic transfer method and magnetic transfer device
A magnetic transfer method which superposes on a magnetic disk surface a magnetic transfer master disk ( 2 ) on which a magnetic film is formed so as to have an array pattern shape corresponding to...
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6987627 |
Device and method for contact patterning of dual-sided magnetic media
A device for use in performing simultaneous contact printing of magnetic patterns in opposing surfaces of a dual-sided magnetic or magneto-optical (MO) recording medium, comprising:
(a) a...
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