Abstract: The present invention introduces a plasma etching method and apparatus. The plasma etching method may include forming a photoresist pattern on a target etching layer, hardening the surface of the photoresist pattern by exposing to a first plasma generated from a first discharge gas containing a reforming gas including carbon (C) and sulfur (S) and sequentially annealing, and etching the target etching layer with a second plasma generated from a second discharge gas using the surface-hardened photoresist pattern as a mask.

Abstract: The present disclosure provides a method for manufacturing a countertop, where a countertop workpiece may be easily secured to a workpiece-mounting device during the machining thereof, leading to good precision and standardization. This may be achieved using a suction of the countertop workpiece via air intake in the mounting device. Further, the present disclosure provides a countertop machining apparatus including a vacuum chamber divided into a multiple of vacuum sub-chambers disposed in a work table, and a suction panel disposed on the chamber. In this configuration, a number of the vacuum sub-chambers to be kept in a vacuum state may be adjusted. This may lead to a reduction of a power consumption required to suction the countertop workpieces.

Abstract: The present invention relates to a method of creating indexes so that an index scan can be worked for columns in a database encrypted by means of secrete key cipher algorithm. The method of creating indexes according to the present invention comprises the steps of: re-encrypting to be able to maintain the sort ordering based on a plain text; creating new indexes based on the re-encrypted data; and configuring domain index architecture of encrypted columns so that the created index is used for the index scan in a query statement.

Abstract: Provided is a V-groove processing apparatus for cutting and V-groove processing. The V-groove processing apparatus includes a processing unit for processing V-grooves in an engineered stone raw plate fixed on a table while being transferred by a transfer unit. Here, the processing unit includes a circular saw blade disposed at a front of a cutting panel to cut the engineered stone raw plate, one or more cutters disposed on a front of a cutter housing to form a V-groove inside a cut surface, a first rise and fall unit transferring the circular saw blade to a cutting location during the cutting of the engineered stone raw plate and restoring the circular saw blade to an original place after the cutting of the engineered stone raw plate, and a second rise and fall unit transferring the circular saw blade and the cutters to a V-groove forming location during the formation of the V-groove and restoring the circular saw blade and the cutters to original places after the formation of the V-groove.

Abstract: Provided is a V-groove processing apparatus for cutting and V-groove processing. The V-groove processing apparatus includes a processing unit for processing V-grooves in an engineered stone raw plate fixed on a table while being transferred by a transfer unit. Here, the processing unit includes a circular saw blade disposed at a front of a cutting panel to cut the engineered stone raw plate, one or more cutters disposed on a front of a cutter housing to form a V-groove inside a cut surface, a first rise and fall unit transferring the circular saw blade to a cutting location during the cutting of the engineered stone raw plate and restoring the circular saw blade to an original place after the cutting of the engineered stone raw plate, and a second rise and fall unit transferring the circular saw blade and the cutters to a V-groove forming location during the formation of the V-groove and restoring the circular saw blade and the cutters to original places after the formation of the V-groove.

Abstract: The present invention relates to a method of creating indexes so that an index scan can be worked for columns in a database encrypted by means of secrete key cipher algorithm.

Abstract: A solid surface counter top is manufactured by preparing a solid surface raw-material sheet having a glossy surface to which a protection film is attached, processing a groove on an opposite surface of the glossy surface, leaving a connection portion having a fine thickness, to fold the raw-material sheet to fit to a shape of the top plate having at least one bent portion, heating the connection portion, and folding the row-material sheet to fit to the shape of the top plate by bending the heated connection portion.