Abstract: An electronic device including a memory device with improved reliability is provided. The semiconductor device comprises a data pin configured to transmit a data signal, a command/address pin configured to transmit a command and an address, a command/address receiver connected to the command/address pin, and a computing unit connected to the command/address receiver, wherein the command/address receiver receives a first command and a first address from the outside through the command/address pin and generates a first instruction on the basis of the first command and the first address, and the computing unit receives the first instruction and performs computation based on the first instruction.

Abstract: The present invention relates to an apparatus for forming a nano pattern capable of fabricating the uniform nano pattern at a low cost including a laser for generating a beam; a beam splitter for splitting the beam from the laser into two beams with the same intensity; variable mirrors for reflecting the two beams split by the beam splitter to a substrate; beam expansion units for expanding diameters of the beams by being positioned on paths of the two beams traveling toward the substrate; and a beam blocking unit, installed on an upper part of the substrate, transmitting only a specific region expanded through the beam expansion unit and blocking regions a remaining region, and a method for forming the nano pattern using the same.

Abstract: Disclosed herein is a biometric authentication device. The biometric authentication device according to the present invention is configured such that it blocks visible light using an authentication button, the inside of which is opened or closed by a finger so as to realize the small size and slim shape of a biometric authentication device, and blocks infrared light or allows infrared light to pass while a driving unit moves vertically or horizontally by the operation of the authentication button. Accordingly, in the biometric authentication device, a camera module captures a normal image in normal mode, and captures an infrared pattern reflected from a finger in a vein authentication mode to perform biometric authentication.

Abstract: There is provided a method of growing a nitride single crystal. A method of growing a nitride single crystal according to an aspect of the invention may include: growing a first nitride single crystal layer on a substrate; forming a dielectric pattern having an open area on the first nitride single crystal layer, the open area exposing a part of an upper surface of the first nitride single crystal layer; and growing a second nitride single crystal layer on the first nitride single crystal layer through the open area while the second nitride single crystal layer grows to be equal to or larger than a height of the dielectric pattern, wherein the height of the dielectric pattern is greater than a width of the open area so that dislocations in the second nitride single crystal layer move laterally, collide with side walls of the dielectric pattern, and are terminated.

Abstract: A method of forming a fine pattern begins with providing a c-plane hexagonal semiconductor crystal. A mask having a predetermined pattern is formed on the semiconductor crystal. The semiconductor crystal is dry-etched by using the mask to form a first fine pattern on the semiconductor crystal. The semiconductor crystal including the first fine pattern is wet-etched to expand the first fine pattern in a horizontal direction to form a second fine pattern. The second fine pattern obtained in the wet-etching the semiconductor crystal has a bottom surface and a sidewall that have unique crystal planes, respectively. The present fine-pattern forming process can be advantageously applied to a semiconductor light emitting device, particularly, to a phonic crystal structure required to have fine patterns or a structure using a surface plasmon resonance principle.

Abstract: Disclosed herein is a biometric authentication device. The biometric authentication device according to the present invention is configured such that it blocks visible light using an authentication button, the inside of which is opened or closed by a finger so as to realize the small size and slim shape of a biometric authentication device, and blocks infrared light or allows infrared light to pass while a driving unit moves vertically or horizontally by the operation of the authentication button. Accordingly, in the biometric authentication device, a camera module captures a normal image in normal mode, and captures an infrared pattern reflected from a finger in a vein authentication mode to perform biometric authentication.

Abstract: Disclosed herein is a vein authentication apparatus. The vein authentication apparatus includes a protective panel provided with a finger-resting surface, a light entry hole and a light exit hole and configured to totally reflect light, a light source located adjacent to the light entry hole of the protective panel and configured to emit the near infrared rays, an imaging element located adjacent to the light exit hole of the protective panel and configured to acquire a vein pattern, a light entry-side diffraction element located in the light entry hole of the protective panel and configured to guide the light toward the fingertip, a light exit-side diffraction element located in the light exit hole of the protective panel and configured to guide the light toward the imaging element, and an authentication unit configured to perform vein authentication using the vein pattern.

Abstract: Disclosed herein is a biometric authentication device. The biometric authentication device includes a main body for forming a hand grip surface and constituting an entire framework of the biometric authentication device. At least one light source is disposed on one side of the main body and configured to radiate light. A reflection unit is included in the main body and attached to a side opposite that of the light source, the reflection unit allowing the radiated light to be incident on a hand and re-reflecting light that is incident on and reflected from the hand. An imaging device is disposed on the side of the main body, which is identical to the side on which the light source is disposed, and is configured to acquire biometric information of the hand by forming images of re-reflected light. An authentication/verification unit performs personal authentication using the biometric information.

Abstract: There is provided a method of growing a nitride single crystal. A method of growing a nitride single crystal according to an aspect of the invention may include: growing a first nitride single crystal layer on a substrate; forming a dielectric pattern having an open area on the first nitride single crystal layer, the open area exposing a part of an upper surface of the first nitride single crystal layer; and growing a second nitride single crystal layer on the first nitride single crystal layer through the open area while the second nitride single crystal layer grows to be equal to or larger than a height of the dielectric pattern, wherein the height of the dielectric pattern is greater than a width of the open area so that dislocations in the second nitride single crystal layer move laterally, collide with side walls of the dielectric pattern, and are terminated.

Abstract: The present invention relates to a method and system for extracting a meaningful core word from a query and a method and system for retrieving information based on the same are disclosed. The system for retrieving extracts a meaningful core word of a lemma, expands the lemma and retrieves texts based on the expanded lemma, to thereby improve performance of the retrieval system and convenience of a user.

Abstract: A method of forming a fine pattern begins with providing a c-plane hexagonal semiconductor crystal. A mask having a predetermined pattern is formed on the semiconductor crystal. The semiconductor crystal is dry-etched by using the mask to form a first fine pattern on the semiconductor crystal. The semiconductor crystal including the first fine pattern is wet-etched to expand the first fine pattern in a horizontal direction to form a second fine pattern. The second fine pattern obtained in the wet-etching the semiconductor crystal has a bottom surface and a sidewall that have unique crystal planes, respectively. The present fine-pattern forming process can be advantageously applied to a semiconductor light emitting device, particularly, to a phonic crystal structure required to have fine patterns or a structure using a surface plasmon resonance principle.

Abstract: The present invention relates to an apparatus for forming a nano pattern capable of fabricating the uniform nano pattern at a low cost including a laser for generating a beam; a beam splitter for splitting the beam from the laser into two beams with the same intensity; variable mirrors for reflecting the two beams split by the beam splitter to a substrate; beam expansion units for expanding diameters of the beams by being positioned on paths of the two beams traveling toward the substrate; and a beam blocking unit, installed on an upper part of the substrate, transmitting only a specific region expanded through the beam expansion unit and blocking regions a remaining region, and a method for forming the nano pattern using the same.

Abstract: Provided is a billing method for telecommunication service based on fixed fee according to user's usage time. The method includes the steps of: estimating reference time according to user's usage time of the previous term; estimating guarantee time; reading user's usage time of this term; and billing telecommunication service fare according to the reference time and the guarantee time.

Abstract: The present invention relates to a method and system for extracting a meaningful core word from a query and a method and system for retrieving information based on the same are disclosed. The system for retrieving extracts a meaningful core word of a lemma, expands the lemma and retrieves texts based on the expanded lemma, to thereby improve performance of the retrieval system and convenience of a user.