Abstract: Provided are a magnetic random access memory (MRAM) device using perpendicular magnetization, capable of stably reducing a size of a magnetic domain, and a method of fabricating the magnetic random access memory device. The magnetic random access memory device includes at least two magnetic layers, a tunnel insulation layer, and an underlayer. Each of the two magnetic layers has a magnetic domain perpendicularly magnetized in a thickness direction. The magnetic random access memory device includes an underlayer located on one side of at least one magnetic layer, and including at least one element of elements forming at least one magnetic layer to induce exchange coupling with the magnetic layer.

Abstract: A recording layer of a magneto-optical storage medium having a sublayer in accordance with the present invention comprises a recording layer on which information is recorded and stored; and a sublayer formed above or below the recording layer and made up of an alloy containing a transition metal, wherein a magnetic anisotropy energy of the sublayer is exchange-coupled to the recording layer, thereby enhancing a coercive force of the recording layer. The sublayer may be formed in a single-layered structure having one layer, or in a multi-layered structure having a plurality of layers. The sublayer is preferably made up of an alloy containing a transition metal used for the recording layer. According to the present invention, the coercive force of the recording layer can be increased by an exchange coupling effect between the recording layer and its adjacent sublayer, and thus, the stability of the magnetic domain in the recording layer can be improved.

Abstract: A plate-type nuclear fuel having regularly arranged coarse particles of a gamma-phase U—Mo or U—Mo—X alloy and a fabrication method thereof and, more particularly, to a plate-type nuclear fuel having coarse spherical particles of a stable gamma-phase U—Mo or U—Mo—X alloy arranged regularly on an aluminum cladding in at least one layer and a fabrication method thereof. Operation limit power, high temperature irradiation stability and performance are advantageously improved by preventing excessive reaction between a nuclear fuel and aluminum matrix through minimization of the area of interaction layers between the fuel and aluminum matrix, minimizing pores and swelling by restraining reaction layer formation of an intermetallic compound, and maintaining high thermal conductivity to transfer internal temperature of the nuclear fuel smoothly.

Abstract: A liquid crystal display device is disclosed in the present invention. The liquid crystal display device includes a color filter substrate having a black matrix, and color filter layers at a designated region determined by the black matrix, an array substrate having a gate bus line and a data bus line crossing perpendicularly and defining a unit pixel region, a thin film transistor arranged at an intersection of the gate bus line and the data bus line, a pixel electrode contacting a drain electrode of the thin film transistor and vertically overlapping portions of the gate bus line, the data bus line, an adjacent gate bus line, and an adjacent data bus line, and an organic insulating layer on the pixel electrode and the thin film transistor, wherein a surface of the array substrate is rubbed in a 315 degree direction, and a liquid crystal layer between the array substrate and the color filter substrate.

Abstract: The present invention relates to a multi-core fuel rod for research reactor and a manufacturing method thereof and, more particularly, to a multi-core fuel rod for research reactor in which monolithic fuel cores made of uranium-molybdenum alloy are disposed in an aluminum matrix in a multi-core form, and a manufacturing method thereof. The multi-core fuel rod in accordance with the present invention provides a minimized contact surface area between nuclear fuel and aluminum, and reduces the formation of pores and swelling by restraining formation of reaction layer to avoid excessive reaction between the fuel and aluminum. Therefore, improved stability of nuclear fuel can be obtained by minimizing temperature rise as well as achieving high density and thermal conductivity of the fuel.

Abstract: An optical head has a beam input/output coupler on a planar waveguide and other parts including: a light transmitting element emitting a beam; a planar waveguide formed on a substrate and receiving the beam oscillated from the light transmitting element; a beam input/output coupler integrated as a thin film on a portion of the planar waveguide and receiving the beam through the planar waveguide to transmit the beam vertically toward a disc positioned above the planar waveguide or transmitting the beam reflected from the disc through the planar waveguide; and light receiving elements receiving the beam propagated to the planar waveguide through the beam input/output coupler.

Abstract: Provided is a small form factor optical/magnetic disk including an integrated metal hub and a disk plate. The integrated metal hub includes a circular upper metal hub and a circular lower metal hub integrally formed with and disposed under the upper metal hub. The circular lower metal hub has a smaller diameter smaller than the upper metal hub. A central hole is formed in central portions of the upper and lower metal hubs and passes through the upper and lower metal hubs. The disk plate has a through-hole that is formed in a central portion and is directly associated with the integrated metal hub, and a recess that is formed around the through-hole and allows the upper metal hub to be mounted therein. Since the central portion of the small form factor optical/magnetic disk is not thick, the small form factor optical/magnetic disk can contribute to an ultra thin small form factor information storage device. Also, since manufacturing processes are simple, price and quality competitiveness can be enhanced.

Abstract: Provided is a method of manufacturing a form factor disk such as an optical or magnetic disk for use in electronic appliances and information appliances. The method includes forming a hub for readily mounting the disk to a magnetic rotational disk connected to a spindle motor of the information appliances by depositing or plating a magnetic material, whereby it is possible to minimize a thickness of the disk, simplifying a manufacturing process, allowing an ultra-small and ultra-slim form factor disk to be manufactured, and therefore, facilitating ultra-minimization and ultra-slim of the information appliances.

Abstract: Provided is a form factor disk such as an optical or magnetic disk used in electronic appliances and information appliances. The form factor disk includes: a circular plate having a first hole for inserting a rotational shaft, a plurality of second holes formed adjacent to the first hole, and an information storage region formed at a surface thereof; an upper metal hub located on the circular plate, and having a hole aligned with the first hole of the circular plate and column-shaped joints formed at portions corresponding to the second holes of the circular plate; and a lower metal hub located under the circular plate, and having a hole aligned with the first hole of the circular plate and column-shaped joints formed at portions corresponding to the second holes of the circular plate, wherein the joints of the upper and lower metal hubs are jointed through the second holes.

Abstract: Provided is an optical pickup actuator for writing/reading data in/from an optical storage medium. The optical pickup actuator includes a heat sink member or a heat conductive material for minimizing a bad influence of heat generated from a coil.

Abstract: Provided is an apparatus and method of initializing a recording layer used in manufacturing a phase-change optical disk for storing information. The optical disk is initialized using a UV lamp in order to initialize the recording layer of the phase-change optical disk capable of repeatedly writing information, without a separate optical head, whereby it is possible to increase productivity by remarkably reducing an initialization time of the optical disk since a large area is initialized using a UV beam.

Abstract: An in-plane switching (IPS) mode liquid crystal display (LCD) device is disclosed which includes a heater line to achieve an improvement in reliability under low temperature conditions. The LCD device includes a first substrate and a second substrate which face each other, a gate line and a data line which are formed on the first substrate such that the gate line and the data line cross each other to define a pixel region, a common electrode and a pixel electrode which are formed on the first substrate in the pixel region, a heater line formed on the first substrate such that the heater line corresponds to the common electrode adjacent to one side of the data line, and a liquid crystal layer formed between the first substrate and the second substrate.

Abstract: An exposure method for an LCD is provided. In the method, a sub-pixel region of an array substrate is divided into a first exposure region and a second exposure region, and the first exposure region and the second exposure region are sequentially exposed.

Abstract: Provided is a planar focusing grating coupler, comprising: a light waveguide including a cladding layer and a core layer formed on a substrate and maintaining incident laser light in a single mode; and a focusing grating coupler formed to have a predetermined grating pitch at a certain area over the core layer, wherein the light using to the light waveguide forms a focal point with the grating layer in the direction perpendicular to the focusing grating coupler, whereby an ultra small pickup head for a mobile optical disk can be used.

Abstract: Provided are a stamper fabricated by using an embossing master and a focusing grating coupler fabricated by using the stamper, which is applicable to a subminiature pickup head for a mobile optic disk, whereby it is possible to reduce a weight and a volume of the pickup head with a simple process and low cost and to apply for mass production.