Samsung Electronics Co., Ltd.

Seagate Technology Incorporated

Seagate Technology International

Hoon-sang Oh

Hoo-san Lee

Chee-kheng Lim

Byung-kyu Lee

Sung-chul Lee

Sok-hyun Kong

Jung-Chak Ahn

Yong-Su Kim

Sung-hoon Choa

Dong-Ki Min

Seong-yong Yoon

Kyung-jin Lee

Yoon-Dong Park

Suk-Pil Kim

June-mo Koo

Chang-rok Moon

Sang-Jun Choi

Kyung-Ho Lee

Dae-lok Bae

No-yeol Park

Sung-dong Kim

Chul-Min Choi

Sung-ho Jin

Chris Hong

Hyun-jei Kim

Tae-hyo Lee

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.

Perpendicular magnetic recording layer with regions having different magnetic anisotropy constants

An image sensor cell, wherein at least one of a plurality of transistors included in image sensor cell is a recess transistor having a channel region recessed into a substrate. The image sensor cell includes an image charge generating unit for generating an image charge corresponding to an image signal, and an image charge converting unit for converting the image charge into an electrical signal, wherein at least one of a plurality of transistors included in the image charge converting unit is a recess transistor including a channel region that is recessed into a substrate.

Image sensor cell, image sensor including image sensor array including plurality of the image sensor cells, and camera system including the image sensor

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.

Image sensors and methods of manufacturing image sensors

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.

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.

Electric field read/write apparatus and method

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.

Magnetic head having shield and recording apparatus employing the same

A multilevel one-time programmable memory device includes a plurality of memory cells, wherein each of the plurality of memory cells includes: a first electrode to which a first voltage is applied, a second electrode to which a second voltage is applied and a plurality of fuse lines performing a fusing operation according to a voltage difference between the first electrode and the second electrode. The plurality of fuse lines are connected to each other between the first electrode and the second electrode. In addition, at least one of the first electrode and the second electrode is formed such that the first electrode and the second electrode have different valid line lengths from each other therebetween so that the plurality of fuse lines have different resistances from each other.

Multilevel one-time programmable memory device

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.

Bit patterned medium

A perpendicular magnetic recording medium including: a substrate; a perpendicular magnetic recording layer disposed over the substrate; a soft magnetic underlayer disposed between the substrate and the perpendicular magnetic recording layer; a shunting layer disposed under the soft magnetic underlayer; and an isolation layer disposed between the soft magnetic underlayer and the shunting layer and providing magnetic isolation between the shunting layer and the other layers disposed over the shunting layer are provided. The shunting layer is magnetically separated from the other magnetic layers disposed over the shunting layer, and shunts a magnetic field generated by the magnetic domain walls of the soft magnetic underlayer such that the magnetic field cannot reach a magnetic head, thereby increasing a signal-to-noise ratio (SNR).

Magnetic recording 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.

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.

Magnetic recording medium and method of fabricating the same

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).

Method of increasing recording density of hard disc drive and controlling device thereof

An information storage device includes a record head and a data recording medium. The record head includes a magnetic substance having magnetic domain walls and records data in the data recording medium. In a method of operating the information storage device, a first high frequency current or a high frequency magnetic field is supplied to the magnetic substance while magnetic domain walls of the magnetic substance are moved.

Information storage devices using magnetic domain wall movement and methods of operating the same

A perpendicular magnetic recording medium including a soft magnetic underlayer. The perpendicular magnetic recording medium includes: a lower structural body including an anti-ferromagnetic layer; a first soft magnetic underlayer, a non-magnetic layer, and a second soft magnetic underlayer sequentially formed on the anti-ferromagnetic layer, where the thickness ratio of the second soft magnetic underlayer to that of the first soft magnetic underlayer is designed to be within specific range; and a recording layer formed on the second soft magnetic underlayer. Therefore, noise generated on the soft magnetic underlayer due to external magnetic fields of a magnetic head and a voice coil motor can be reduced greatly.

Perpendicular magnetic recording media with soft magnetic underlayer

A digital MR sensor with a high magnetoresistance ratio is provided. The MR sensor includes a first magnetic element; and a second magnetic element at least a part of which is resiliently deformable so as to contact with or be separated from the first magnetic element according to a direction of a magnetic force generated between the first and second magnetic elements while the second magnetic element is magnetized under influence of an external magnetic field.

Growing community of inventors

Seongnam-si, South Korea

Hoon-sang Oh