| Patent application number | Description | Published |
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| 20090040642 | RECORDING DATA SIMULTANEOUSLY AT TWO DEPTHS OF A TILTED MAGNETIC MEDIUM - Methods and recording systems are configured for recording different data simultaneously at two different depths of a tilted magnetic medium, the tilted magnetic medium having a hard axis of magnetization, the axis being out of a plane of the medium and at an angle of −10 to −80 degrees with respect to a direction along which data are recorded, the medium being capable of having two depths of recording. A method embodies writing with selected magnetic fields whose amplitudes and whose angles with respect to the medium hard axis direction differ at the two depths of the medium such that the recorded direction of magnetization at the respective two depths can be set independently. | 02-12-2009 |
| 20090040657 | RECORDING DATA SIMULTANEOUSLY AT TWO DEPTHS OF A TILTED MAGNETIC MEDIUM - Methods and recording systems are configured for recording different data simultaneously at two different depths of a tilted magnetic medium, the tilted magnetic medium having a hard axis of magnetization, the axis being out of a plane of the medium and at an angle of −10 to −80 degrees with respect to a direction along which data are recorded, the medium being capable of having two depths of recording. A method embodies writing with selected magnetic fields whose amplitudes and whose angles with respect to the medium hard axis direction differ at the two depths of the medium such that the recorded direction of magnetization at the respective two depths can be set independently. | 02-12-2009 |
| 20100073814 | WRITING AND READING MULTI-LAYER CONTINUOUS MAGNETIC RECORDING MEDIA - A method and apparatus for writing magnetization states in a pair of magnetic layers of a multi-layer continuous magnetic recording medium and a method and apparatus for reading readback pulse shapes representing a magnetization state transition between such written magnetization states of a two-layer continuous magnetic recording medium. Writing each magnetization state includes selecting the magnetization state, determining a write current sufficient to write the magnetization state, and applying the write current to a magnetic write head to write the magnetization state by simultaneously writing associated magnetic states in each magnetic layer of the pair of magnetic layers. A readback pulse shape representing a written magnetization state transition is read. The written magnetization state transition is uniquely identified from the readback pulse shape of the transition or from both the readback pulse shape of the transition and the readback pulse shape of one or more next magnetization state transitions. | 03-25-2010 |
| 20100075178 | WRITING AND READING MULTI-LEVEL PATTERNED MAGNETIC RECORDING MEDIA - A method and apparatus for writing magnetization states in a pair of magnetic islands of a multi-level patterned magnetic recording medium and a method and apparatus for reading readback waveforms representing the written magnetization states of a pair of magnetic islands of a two-level patterned magnetic recording medium. Writing each magnetization state includes selecting the magnetization state, determining a write current sufficient to write the magnetization state, and applying the write current to a magnetic write head to write the magnetization state by simultaneously writing associated magnetic states in each magnetic island of the pair of magnetic islands. Reading the readback waveform representing the written magnetization state is implemented through use of a magnetic read head and includes: identifying the written magnetization state by decoding the readback waveform; and displaying and/or recording the written magnetization state. | 03-25-2010 |
| 20110047785 | METHODS FOR FABRICATING MAGNETIC TRANSDUCERS USING POST-DEPOSITION TILTING - In one general embodiment, a method is provided for fabricating magnetic structures using post-deposition tilting. A thin film magnetic transducer structure is formed on a substantially planar portion of a substrate such that a plane of deposition of the thin film transducer structure is substantially parallel to a plane of the substrate. Additionally, the thin film transducer structure is caused to tilt at an angle relative to the plane of the substrate. The thin film transducer is fixed at the angle after being tilted. | 03-03-2011 |
| 20110051284 | SYSTEMS AND METHODS FOR FABRICATING MAGNETIC WRITER STRUCTURES USING POST-DEPOSITION TILTING - A method according to one embodiment includes forming a first portion of a thin film writer structure on a substantially planar portion of a substrate such that planes of deposition of the first portion of the writer structure are substantially parallel to a plane of the substrate; forming a portion of a write gap of the writer structure at an angle of greater than 0° relative to the substantially planar portion of the substrate; and causing the writer structure to tilt at an angle relative to the plane of the substrate such that a plane of deposition of the write gap is oriented about perpendicular to a final media-facing surface of the writer structure. A system according to one embodiment includes a first portion comprising at least a portion of a coil structure and at least a portion of a magnetic yoke, the first portion being oriented at an angle of greater than 0° and less than 90° relative to a substantially planar portion of an underlying substrate; a first pole; a second pole; and a write gap, a portion of the write gap having a plane of deposition oriented about perpendicular to a final media-facing surface of the write gap. | 03-03-2011 |
| 20110058271 | SYSTEMS AND METHODS FOR REDUCING CROSSTALK BETWEEN ADJACENT WRITERS - In one general embodiment, a recording system controller includes a controller controlling a timing of flux switching of adjacent pairs of writers such that the writers in a given pair do not switch substantially concurrently, and reducing a current of one of the writers in the pair while the adjacent writer is writing a transition. In another general embodiment, a recording system controller includes a controller controlling a timing of pulse writing of adjacent pairs of writers such that the writers in a given pair do not pulse substantially concurrently. In yet another general embodiment, a method includes controlling a timing of pulse writing or flux switching of adjacent pairs of writers such that the writers in a given pair do not pulse or switch substantially concurrently. | 03-10-2011 |
| 20110108626 | ELECTRONIC CARD AND METHOD FOR GENERATING A MAGNETIC FIELD FROM SWIPING THE ELECTRONIC CARD THROUGH A CARD READER - An electronic card and a method for processing data stored in the electronic card. The electronic card includes a memory containing data to be read by a card reader. The electronic card may include a programmable field source containing wire structures geometrically configured and energized in a manner that drives an electric current through only two wire structures at a time for generating a time varying magnetic field that induces a readback signal in the card reader as the electronic card is being swiped through the card reader. An electrical current in at least one wire in the electronic card generates a time varying magnetic field and may include a finite time derivative of electrical current whose magnitude does not exceed a specified maximum time derivative of electrical current corresponding to a peak voltage threshold (V | 05-12-2011 |
| 20110109984 | WRITING AND READING MULTI-LAYER CONTINUOUS MAGNETIC RECORDING MEDIA, WITH MORE THAN TWO RECORDING LAYERS - A method and apparatus for writing magnetization states in magnetic layers of a multi-layer continuous magnetic recording medium with more than two recording levels and a method and apparatus for reading readback pulse shapes representing a magnetization state transition between such written magnetization states. Writing each magnetization state includes selecting the magnetization state, determining a write current sufficient to write the magnetization state, and applying the write current to a magnetic write head to write the magnetization state, including simultaneously writing associated magnetic states in each magnetic layer of at least one pair of magnetic layers. A readback pulse shape representing a written magnetization state transition is read. The written magnetization state transition is uniquely identified from the readback pulse shape of the transition or from both the readback pulse shape of the transition and the readback pulse shape of one or more contiguous magnetization state transitions. | 05-12-2011 |
| 20110109987 | WRITING AND READING MULTI-LEVEL PATTERNED MAGNETIC RECORDING MEDIA, WITH MORE THAN TWO RECORDING LEVELS - A method and apparatus for writing magnetization states in magnetic islands of a multi-level patterned magnetic recording medium with more than two recording levels and a method and apparatus for reading readback waveforms representing written magnetization states of the magnetic islands in the multi-level patterned magnetic recording medium. Writing each magnetization state includes selecting the magnetization state, determining a write current sufficient to write the magnetization state, and applying the write current to a magnetic write head to write the magnetization state, including simultaneously writing associated magnetic states in each magnetic island of at least one pair of magnetic islands. Reading the readback waveform representing a written magnetization state is implemented through use of a magnetic read head and includes: identifying the written magnetization state by decoding the readback waveform; and displaying and/or recording the written magnetization state. | 05-12-2011 |
| 20110109998 | RECORDING HEAD WITH TILTED ORIENTATION - In one embodiment, a read sensor for a recording head for a magnetic media storage system, has first and second shields, and a magneto-resistive sensor disposed between and shielded by the first and second shields in which the sensing axis of the sensor is tilted with respect to the recording surface of the head. In one embodiment, the sensing axis is oriented at an angle between 10 and 60 degrees with respect to the normal of the recording surface. Other embodiments are described and claimed. | 05-12-2011 |
| 20110134560 | WRITING AND READING MULTI-LEVEL PATTERNED MAGNETIC RECORDING MEDIA - A method and system for reading readback waveforms representing written magnetization states of a pair of magnetic islands of a two-level patterned magnetic recording medium, and a structure that include a multi-level patterned magnetic medium. Reading the readback waveform representing the written magnetization state includes: identifying the written magnetization state by decoding the readback waveform; and displaying and/or recording the written magnetization state. The magnetic medium of the structure includes distributed pillars. Each pillar includes a first and second magnetic island. Each magnetic island has a magnetic easy axis oriented at a first tilt angle (α | 06-09-2011 |
