Patent application number | Description | Published |
20080231999 | TUNNELING MAGNETORESISTIVE DEVICE AND MAGNETIC HEAD COMPRISING THE SAME - A tunneling magnetoresistive device and a magnetic head including the tunneling magnetoresistive device are provided. The tunneling magnetoresistive device includes a pinned layer and a free layer formed on either side of a tunneling barrier layer, wherein the tunneling barrier layer includes Te—O. | 09-25-2008 |
20080278852 | PERPENDICULAR MAGNETIC RECORDING HEAD AND METHOD OF MANUFACTURING THE SAME - A perpendicular magnetic recording head and a method of manufacturing said perpendicular magnetic recording head are provided. The perpendicular magnetic recording head has a main pole, a coil, which applies a magnetic field to the main pole, and a return pole constituting a magnetic circuit together with the main pole. The main pole has a back pole around which the coil is wound and a front pole contacting the back pole. The back pole and the front pole are formed on the same plane. | 11-13-2008 |
20080316646 | PERPENDICULAR MAGNETIC RECORDING HEAD AND METHOD OF MANUFACTURING THE SAME - A perpendicular magnetic recording head and a method of manufacturing the same are provided. The perpendicular magnetic recording head that includes a main pole, a return yoke, and coils that surround upper and lower parts of the main pole in a solenoid shape so that the main pole generates a magnetic field for recording information onto a recording medium, wherein a portion of the coils that pass above the main pole comprises a plurality of first coils and at least one second coil having a cross-sectional shape different from that of the first coils, and the second coil is formed across upper regions of two first coils adjacent to each other among the first coils. | 12-25-2008 |
20090015965 | PERPENDICULAR MAGNETIC RECORDING HEAD AND METHOD FOR MANUFACTURING THE SAME - A perpendicular magnetic recording head includes a main pole, a return yoke forming a magnetic path with the main pole, and a coil encompassing the main pole in a solenoid structure to allow the main pole to generate a magnetic field that records information on a recording medium is provided. When a side of the main pole toward the return yoke is an upper portion of the main pole and a side of the main pole opposite to the return yoke is a lower portion of the main pole, the coil includes a lower wire portion passing through the lower portion of the main pole, an upper wire portion passing through the upper portion of the main pole, and a connection portion electrically connecting the lower wire portion and the upper wire portion, and the upper wire portion includes an upper wire layer having at least two layers. The structure may improve a high frequency recording characteristics required for achieving a high recording density. | 01-15-2009 |
20090059424 | MAGNETIC HEAD, MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING APPARATUS USING THE MAGNETIC HEAD AND MAGNETIC RECORDING MEDIUM - Provided are a magnetic head, a magnetic recording medium, and a magnetic recording apparatus using the magnetic head and the magnetic recording medium. The magnetic head is used for magnetically recording data on a magnetic recording medium and includes a main pole; a return-yoke forming a magnetic path along with the main pole; a coil for inducing a magnetic field to emit a magnetic field for magnetic recording through an end tip of the main pole near a magnetic recording medium; and an insulating layer for electrically insulating the main pole from the return-yoke. The main pole is electrically connected to an external device and generates an electric field for assisting magnetic recording along the magnetic field for magnetic recording. In this structure, the coercive force of a magnetic recording layer can be reduced during magnetic recording so that data can be recorded at high density. | 03-05-2009 |
20090067098 | PERPENDICULAR MAGNETIC RECORDING HEAD AND METHOD OF MANUFACTURING THE SAME - A perpendicular magnetic recording (PMR) head and a method of manufacturing the same are provided. The PMR head includes: a main pole; a coil enclosing the main pole as a solenoid type to allow the main pole to generate a magnetic field required for recording data on a recording medium; and a return yoke forming a magnetic path of a magnetic field together with the main pole and having a throat disposed opposite the main pole with a gap between the return yoke and the main pole. One end of the gap disposed near an air bearing surface (ABS) is thinner than the other end of the gap, such that the throat tapers from the other end of the gap to the one end of the gap. | 03-12-2009 |
20090103214 | MAGNETIC RECORDING HEAD COMPRISING CONICAL MAIN POLE TIP AND METHOD OF MANUFACTURING THE SAME - Provided is a vertical magnetic recording head having a main pole, a return yoke, and a coil, all of which are formed on a substrate, and a method of manufacturing the same. The main pole includes a vertical portion which is vertical to the substrate, a horizontal portion that connects a lower part of the vertical portion to the return yoke, and a main pole tip formed on the vertical portion of the main pole. The main pole tip has a conical shape vertical to the substrate. | 04-23-2009 |
20090116144 | PERPENDICULAR MAGNETIC RECORDING HEAD AND METHOD OF MANUFACTURING THE SAME - Provided are a perpendicular magnetic recording head and a method of manufacturing the same. The perpendicular magnetic recording head includes a main pole including a pole tip applying a recording magnetic field to a recording medium, a coil surrounding the main pole in a solenoid shape such that recording magnetic field for recording information to a recording medium is generated at the pole tip, and a return yoke forming a magnetic path for the recording magnetic field together with the main pole and surrounding a portion of the coil passing above the main pole. The number of times that the coil passes above the main pole is smaller than the number of times that the coil passes below the main pole. | 05-07-2009 |
20090122449 | MAGNETIC WRITE HEAD AND METHOD OF MANUFACTURING THE SAME - A magnetic write head includes a main pole, a return yoke forming a magnetic path with the main pole, a side shield formed at both sides of the main pole, and a shield gap layer formed between the side shield and the return yoke. The side shield and the return yoke have portions connected to each, and are separated from each other by the shield gap layer in an area except for the portions which contact. A first gap layer formed of a nonmagnetic insulation material is formed between both sides of the main pole and the side shield. A gap is formed between an end portion of the main pole and an end portion of the return yoke and a second gap layer is formed in the gap with a nonmagnetic insulation material. | 05-14-2009 |
20130075359 | Perpendicular Magnetic Recording Head and Method of Manufacturing the Same - Provided are a perpendicular magnetic recording head and a method of manufacturing the same. The perpendicular magnetic recording head includes a main pole including a pole tip applying a recording magnetic field to a recording medium, a coil surrounding the main pole in a solenoid shape such that recording magnetic field for recording information to a recording medium is generated at the pole tip, and a return yoke forming a magnetic path for the recording magnetic field together with the main pole and surrounding a portion of the coil passing above the main pole. The number of times that the coil passes above the main pole is smaller than the number of times that the coil passes below the main pole. | 03-28-2013 |