Abstract: A SiC semiconductor device having high pressure resistance properties is disclosed. The present invention provides a SiC semiconductor device comprising: a SiC substrate having a first surface and a second surface; an insulating area formed on the second surface side inside the SiC substrate; and a plurality of semiconductor areas including a source area, a base area, and a drain area formed along the first surface on the insulating area, wherein the SiC semiconductor device has a P/N junction parallel to the first surface, the P/N junction extending from the base area toward the drain area on the insulating area and being formed by a first auxiliary region of a first conductive type which is the same conductive type as the source area and a second auxiliary region of a second conductive type which is opposed to the first conductive type.

Abstract: The present disclosure relates to a steer-by-wire type steering apparatus. According to present embodiments, in the steer-by-wire type steering apparatus, when a driver generates a larger steering torque than a reaction torque of a reaction motor in a steering shaft, rotation of the steering shaft can be prevented.

Abstract: Disclosed is an air-gap type film bulk acoustic resonator (FBAR) including a substrate including an air-gap portion with a top surface in which a substrate cavity is formed, a lower electrode formed above the substrate while surrounding the air-gap portion, a piezoelectric layer formed above the lower electrode, and an upper electrode formed above the piezoelectric layer corresponding to a virtual area formed according to a vertical projection of the air-gap portion. Here, the piezoelectric layer includes a void portion having a piezoelectric cavity between the lower electrode and the upper electrode, and the void portion is formed below an edge portion corresponding to an end part of the upper electrode.

Abstract: An electric power steering apparatus according to the embodiments of the present disclosure may comprise a ball screw having an outer screw groove formed on its outer circumferential surface, a ball nut having a gear portion formed on one side of the outer circumferential surface and an inner screw groove corresponding to the outer screw groove formed on the inner circumferential surface, coupled to the ball screw through a ball and sliding in the axial direction, a sector shaft having a shaft gear coupled to the gear portion of the ball nut on an outer circumferential surface and rotating when the ball nut slides in an axial direction, and a sliding support member coupled to the outer circumferential surface of the ball nut, supported on an inner circumferential surface of a housing, and axially slid together with the ball nut.

Abstract: The present invention relates to a trench-gate SiC MOSFET device and a manufacturing method therefor. The trench-gate SiC MOSFET device of the present invention comprises: a gate oxide film covering a gate trench formed in a SiC substrate (e.g., an n-type 4H-SiC substrate); a doped well (e.g., BPW) formed in a bottom region of the gate trench; a gate electrode formed in the gate trench covered by the gate oxide film; an interlayer insulating film formed on the gate electrode; a source electrode covering the top surface of a doping layer for a source area formed on the entire surface of an epitaxial layer of the substrate and the top surface of the interlayer insulating film; and a drain electrode formed on the rear surface of the substrate.

Abstract: An amplifier-embedded video surveillance IP speaker system is disclosed. The present disclosure includes an IP video device, an IP audio device, and a sensor, wherein audio data of a monitor agent using a remote user terminal is transmitted to an amplifier-embedded IP speaker having an assigned IP address to then be output, or wherein a remote control command is transmitted to an amplifier-embedded IP speaker, thereby outputting a warning sound.

Abstract: The present disclosure relates to a steer-by-wire type steering apparatus. According to present embodiments, in the steer-by-wire type steering apparatus, when a driver generates a larger steering torque than a reaction torque of a reaction motor in a steering shaft, rotation of the steering shaft can be prevented.

Abstract: The present invention relates to a silicon carbide trench Schottky barrier diode using polysilicon and a method of manufacturing same. The diode has a low turn-on voltage and an improved reverse characteristic. The method includes sequentially forming an epitaxial layer, a polysilicon layer, an oxide film, and a photoresist film on a silicon carbide substrate, patterning the photoresist to form a photoresist pattern, etching the oxide film using the photoresist pattern as an etching mask to form an oxide film pattern, etching the polysilicon layer using the oxide film pattern as an etching mask to form a polysilicon pattern, removing the photoresist pattern, forming an epitaxial pattern by etching the epitaxial layer down to a predetermined depth using the oxide film pattern as an etching mask, and removing the oxide film pattern to produce a trench.

Abstract: An amplifier-embedded video surveillance IP speaker system is disclosed. The present disclosure includes an IP video device, an IP audio device, and a sensor, wherein audio data of a monitor agent using a remote user terminal is transmitted to an amplifier-embedded IP speaker having an assigned IP address to then be output, or wherein a remote control command is transmitted to an amplifier-embedded IP speaker, thereby outputting a warning sound.

Abstract: The present disclosure relates to a steer-by-wire type steering apparatus. According to present embodiments, in the steer-by-wire type steering apparatus, when a driver generates a larger steering torque than a reaction torque of a reaction motor in a steering shaft, rotation of the steering shaft can be prevented.

Abstract: Provided is a composition for treating nerve injury, the composition including a natural killer cell, an immune cell, or a substance increasing activity thereof. According to the natural killer cell, the immune cell, or the substance increasing activity thereof according to an aspect, the natural killer cell may infiltrate into a nerve injury site to directly remove injured nerve cells, thereby being usefully applied to fundamental treatment of a nervous system disease caused by nerve injury or abnormal nerves.

Abstract: Disclosed is an air-gap type film bulk acoustic resonator (FBAR) including a substrate including an air-gap portion with a top surface in which a substrate cavity is formed, a lower electrode formed above the substrate while surrounding the air-gap portion, a piezoelectric layer formed above the lower electrode, and an upper electrode formed above the piezoelectric layer corresponding to a virtual area formed according to a vertical projection of the air-gap portion. Here, the piezoelectric layer includes a void portion having a piezoelectric cavity between the lower electrode and the upper electrode, and the void portion is formed below an edge portion corresponding to an end part of the upper electrode.

Abstract: The present invention relates to a silicon carbide trench Schottky barrier diode using polysilicon and a method of manufacturing same. The diode has a low turn-on voltage and an improved reverse characteristic. The method includes sequentially forming an epitaxial layer, a polysilicon layer, an oxide film, and a photoresist film on a silicon carbide substrate, patterning the photoresist to form a photoresist pattern, etching the oxide film using the photoresist pattern as an etching mask to form an oxide film pattern, etching the polysilicon layer using the oxide film pattern as an etching mask to form a polysilicon pattern, removing the photoresist pattern, forming an epitaxial pattern by etching the epitaxial layer down to a predetermined depth using the oxide film pattern as an etching mask, and removing the oxide film pattern to produce a trench.

Abstract: Embodiments disclosed herein relates to a reducer of an electric power steering apparatus. The embodiments provide a reducer of an electric power steering apparatus that includes: a worm shaft having a first end connected to a motor shaft and a second end that is opposite the first end, in which a first worm shaft bearing and a second worm shaft bearing are coupled to the first end and the second end, respectively; a gear housing in which the first worm shaft bearing, the second worm shaft bearing, and the worm shaft are housed; and a moisture absorption compensation member which is supported on and coupled to an inner circumferential surface of the gear housing in a direction in which the worm shaft meshes with the worm wheel and supports the worm shaft in a direction opposite the direction in which the worm shaft meshes with the worm wheel.

Abstract: The present disclosure relates to a steer-by-wire type steering apparatus. According to present embodiments, in the steer-by-wire type steering apparatus, when a driver generates a larger steering torque than a reaction torque of a reaction motor in a steering shaft, rotation of the steering shaft can be prevented.

Abstract: The present invention relates to an electric power steering apparatus. The electric power steering apparatus includes: a rack housing including a sliding recess that is formed between a motor coupling hole in which a motor pulley is mounted and a ball nut coupling hole in which a nut pulley is mounted, the sliding recess being formed to extend in a direction perpendicular to a longitudinal direction where a belt is mounted; and a tension adjusting member including a central shaft one end of which is inserted into the sliding recess, a connection member coupled to another end of the central shaft, a pair of rollers coupled to opposite ends of the connection member to tighten opposite sides of an outer peripheral face of the belt, the central shaft being slid along the sliding recess to adjust the tension of the belt.

Abstract: Embodiments disclosed herein relates to a reducer of an electric power steering apparatus. The embodiments provide a reducer of an electric power steering apparatus that includes: a worm shaft having a first end connected to a motor shaft and a second end that is opposite the first end, in which a first worm shaft bearing and a second worm shaft bearing are coupled to the first end and the second end, respectively; a gear housing in which the first worm shaft bearing, the second worm shaft bearing, and the worm shaft are housed; and a moisture absorption compensation member which is supported on and coupled to an inner circumferential surface of the gear housing in a direction in which the worm shaft meshes with the worm wheel and supports the worm shaft in a direction opposite the direction in which the worm shaft meshes with the worm wheel.

Abstract: The present invention relates to an electric power steering apparatus. The electric power steering apparatus includes: a rack housing including a sliding recess that is formed between a motor coupling hole in which a motor pulley is mounted and a ball nut coupling hole in which a nut pulley is mounted, the sliding recess being formed to extend in a direction perpendicular to a longitudinal direction where a belt is mounted; and a tension adjusting member including a central shaft one end of which is inserted into the sliding recess, a connection member coupled to another end of the central shaft, a pair of rollers coupled to opposite ends of the connection member to tighten opposite sides of an outer peripheral face of the belt, the central shaft being slid along the sliding recess to adjust the tension of the belt.

Abstract: The present invention relates to an apparatus for controlling the operation of an LED and to a method for controlling the drive current thereof. More particularly, the present invention relates to an apparatus for controlling the operation of an LED, which is capable of driving a direct current-operated LED module or an alternating current-operated LED module using alternating current power, and to a method for controlling the drive current of the apparatus. According to the present invention, the drive current of an LED array can be output in the form of a sine wave by a constant-current regulation or constant-power regulation even when input voltage varies, thus suppressing harmonics, improving the power factor, minimizing flicker, and preventing a temperature increase in the LED array and in an LED operation control circuit.