Patent application number | Description | Published |
20080299416 | PERPENDICULAR MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - A perpendicular magnetic recording medium and a method of manufacturing the same are provided. The perpendicular magnetic recording medium comprises a recording layer including a plurality of regions formed in the depth direction of the recording layer and a magnetic anisotropy constant of a region relatively deeper than another region, among the plurality of regions, is greater than that of the another region. The method of manufacturing a perpendicular magnetic recording medium includes: forming a recording layer having perpendicular magnetic anisotropy; and irradiating the recording layer with ions. | 12-04-2008 |
20090002875 | MAGNETIC RECORDING MEDIUM AND METHOD OF FABRICATING THE SAME - A magnetic recording medium and a method of fabricating the same are provided. The magnetic recording medium in which a position for magnetic recording is patterned with a magnetic material, includes a magnetic recording layer which includes a data area having a plurality of data tracks, and a servo area having a servo burst for following the data tracks, wherein the servo burst includes a plurality of bursts disposed in a zigzag structure along a downtrack direction, and each of the bursts includes a plurality of burst pieces having different coercivities from each other. The magnetic recording medium is subjected to two servo-recording processes, so that a signal similar to an alternative signal written in a burst having a burst pattern used in a related art continuous medium can be obtained. | 01-01-2009 |
20090009903 | METHOD OF INCREASING RECORDING DENSITY OF HARD DISC DRIVE AND CONTROLLING DEVICE THEREOF - Provided is a method of increasing recording density and a control apparatus for increasing the recording density. The method includes applying a recording current corresponding to a recording signal to a magnetic head of a hard disc drive (HDD), and limiting a current value being applied to the magnetic head to a critical value when the recording current reaches the critical value. In the method, a rising time is reduced by using an overshoot recording current and the recording current is limited to a critical value when an actual recording current reaches the critical value. Thus, write track widths (WTWs) can be reduced at a low recording frequency, thereby increasing tracks per inch (TPI). | 01-08-2009 |
20090011282 | MAGNETIC RECORDING MEDIUM, HARD DISK DRIVE EMPLOYING THE SAME, AND METHOD OF MEASURING WRITE READ OFFSET OF THE HARD DISK DRIVE - A magnetic recording medium, a hard disk drive (HDD) employing the same, and a method of measuring a write read (WR) offset of the HDD are provided. The magnetic recording medium includes a disk substrate and a magnetic recording layer formed on one or both surfaces of the disk substrate, wherein the magnetic recording layer comprises: at least one pattern area patterned into a plurality of data tracks wherein the at least one pattern area is formed of a patterned magnetic substance; and at least one continuous area formed of a continuous magnetic substance, wherein the continuous area is used to measure a WR offset. Accordingly, the HDD employing the magnetic recording medium can correct the WR offset of the magnetic head without requiring large modifications. | 01-08-2009 |
20090059429 | BIT PATTERNED MEDIUM - Provided is a bit patterned medium including bridges which induce exchange coupling between adjacent bits in order to reduce a switching field difference resulting from different magnetization directions of bits. The bridges and the bits are integrally formed with each other. The bits are locally connected by the bridges. A magnetostatic force for each bit is reduced due to an exchange coupling between adjacent bits, thereby reducing a switching field distribution of the bits. | 03-05-2009 |
20090061259 | BIT PATTERNED MEDIUM - A bit patterned medium in which an exchange coupling layer induces exchange coupling between adjacent bits in order to reduce a switching field difference resulting from different magnetization directions of bits. The exchange coupling layer is disposed either over or under a recording layer having a plurality of bits. The exchange coupling layer induces exchange coupling between a bit which is to be recorded and an adjacent bit and reduces a switching field difference resulting from a difference between the magnetization direction of the bit to be recorded and the magnetization direction of neighboring bits due to an exchange coupling force generated during the exchange coupling. | 03-05-2009 |
20090068500 | PERPENDICULAR MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - Provided are a perpendicular magnetic recording medium and a method of manufacturing the same. The perpendicular magnetic recording medium includes: a substrate; a soft magnetic layer formed on the substrate; an underlayer formed on the soft magnetic layer; and a recording layer comprising a plurality of ferromagnetic layers and formed on the underlayer, wherein each of the plurality of ferromagnetic layers has a magnetic anisotropic energy which decreases as distance increases from the underlayer. | 03-12-2009 |
20090141407 | MAGNETIC HEAD AND RECORDING APPARATUS EMPLOYING THE SAME - A magnetic head and a recording apparatus employing the same are provided. The magnetic head includes a recording member, a field inducing member inducing a magnetic field to the recording member, a shield member having the same direction of magnetization as the recording member in a recording operation, and a return path member forming a magnetic path with the recording member. | 06-04-2009 |
20090316564 | ELECTRIC FIELD READ/WRITE APPARATUS AND METHOD - Provided are an electric field read/write apparatus and method, which reproduce information written in a recording medium by using an electric field read/write head including a channel. In the electric field read/write apparatus and method, an electric field generated from the recording medium is modulated by using a modulation signal, a variation in the modulated electric field is detected, and a voltage signal determined according to the detected variation is demodulated and information written in the recording medium is determined according to a result of the demodulation. | 12-24-2009 |
20100103294 | Image pickup devices and image processing methods using the same - An image pickup device may include a sensor array including a plurality of pixels and an actuator operatively connected to the sensor array. The actuator may be configured to sequentially move the sensor array, in a horizontal or vertical direction by one pixel pitch, in response to a control signal. A method of processing image signals using an image pickup device may include moving the plurality of pixels by the one pixel pitch using the actuator in order to allow multiple pixels to be sequentially located at a position on which light is incident, and sequentially detecting color component signals of each of the multiple pixels from the incident light. | 04-29-2010 |
20110013055 | Optical sensor and semiconductor device - Example embodiments are directed to a semiconductor device including a color pixel array on a substrate; a distance pixel array on the substrate; a light-inducing member on the color pixel array and the distance pixel array; an infrared light cut filter on the light-inducing member and configured to block infrared light; a near infrared light filter on the light-inducing member and configured to allow near infrared light to pass; and an RGB filter on the light-inducing member and configured to allow visible light to pass. According to example embodiments, a method of manufacturing a semiconductor device may include forming a color pixel array on a substrate; forming a distance pixel array on the substrate; forming a light-inducing member on the color pixel array and the distance pixel array; forming an infrared light cut filter on the light-inducing member; forming a near infrared light filter on the light-inducing member; forming a RGB filter on the light-inducing member; and forming a plurality of lenses on the infrared light cut filter and the near infrared light filter. | 01-20-2011 |
20110096215 | Image Sensors and Methods of Manufacturing Image Sensors - An image sensor includes a first substrate including a driving element, a first insulation layer on the first substrate and on the driving element, a second substrate including a photoelectric conversion element, and a second insulation layer on the second substrate and on the photoelectric conversion element. A surface of the second insulation layer is on an upper surface of the first insulation layer. The image sensor includes a conductive connector penetrating the second insulation layer and a portion of the first insulation layer. Methods of forming image sensors are also disclosed. | 04-28-2011 |
20130021894 | TRANSDUCING DATA USING HIGH FREQUENCY FERROELECTRIC READ DEMODULATION - Apparatus and method for transducing data from a ferroelectric data storage medium using high frequency read modulation. In accordance with some embodiments, a ferroelectric data transducer has a write electrode, a doped semiconductor layer with a source, a drain and a channel therebetween, and an insulating layer disposed between the channel and the write electrode. A write circuit applies a time varying write signal at a first frequency to the write electrode to write a corresponding sequence of data bits to an adjacent ferroelectric data storage medium. A read circuit reads the sequence of data bits from the data storage medium by applying a time varying read signal at a higher, second frequency to the write electrode and detecting changes in electrical resistance of the channel. | 01-24-2013 |
20130143073 | Perpendicular Magnetic Recording Layer with Regions Having Different Magnetic Anisotropy Constants - An apparatus having a recording layer of a magnetic material with a concentration of implanted ions that increases in relation to a thickness direction of the recording layer to provide the recording layer with a continuously varied perpendicular magnetic anisotropy constant. | 06-06-2013 |