Abstract: The present invention relates to a cutting tool capable of both drilling and internal/external turning. The cutting tool comprises a generally triangular-shaped cutting insert and a tool holder. On each side, the triangular-shaped cutting insert forms a major cutting edge and a minor cutting edge, which is shorter than said major cutting edge. Two adjacent major cutting edges form an angle of 60° therebetween, while adjacent major and minor cutting edges intersecting at a corner of the triangular shape of the cutting insert form an angle of 80 to 89° therebetween. The cutting insert is mounted in a pocket so that one of the major cutting edges of the cutting insert is projected in an axially forward direction of the tool holder, while the minor cutting edge on the side adjacent to the projected major cutting edge is projected in a radially outward direction of the tool holder.

Abstract: A tool holder has an apparatus for clamping a cutting insert thereto. The tool holder has a cutting insert pocket and a mounting bore; a clamp lever including a clamp portion and a lever portion placed in the mounting bore; and a fixing screw. The fixing screw is fastened through a hole which extends downwardly from a side wall of the tool holder to the mounting bore. One end of the fixing screw further includes a pressure-applying surface substantially perpendicular to the rotational axis of the fixing screw, and the side surface of the lever portion of the clamp lever has an inclined surface which makes contact with the pressure-applying surface of the fixing screw. According to the clamping apparatus, the cutting insert can be firmly clamped to the tool holder.

Abstract: A cutting insert has a structure by which a sufficient surface area is in contact with a tool holder and cutting fluid can be smoothly flowed. The cutting insert has an upper face, a lower face, a plurality of side faces connecting the upper face and the lower face and a through hole passing through the upper face and the lower face, the upper face being divided into a periphery region disposed adjacently to cutting edges formed by the upper face and the side faces, and a central protruded region disposed between the through hole and the periphery region and surrounding the through hole, the central protruded region being placed higher than the edges. The periphery region is formed along all the cutting edges and includes a descent face inclined downward from a given cutting edge to the central protruded region, a bottom face and an ascent face inclined upward from the bottom face to the central protruded region.

Abstract: An organic light emitting display device includes an organic light emitting display panel; a bezel including a lower surface and a plurality of side walls extending from edges of the lower surface, and receiving the display panel therein; and a protective window provided on the top of the bezel, wherein the bezel is provided with a first rib, and the protective window is provided with a groove coupled to the first rib.

Abstract: A semiconductor probe having a wedge shape resistive tip and a method of fabricating the semiconductor probe is provided. The semiconductor probe includes a resistive tip that is doped with a first impurity, has a resistance region doped with a low concentration of a second impurity having an opposite polarity to the first impurity, and has first and second semiconductor electrode regions doped with a high concentration of the second impurity on both side slopes of the resistive tip. The probe also includes a cantilever having the resistive tip on an edge portion thereof, and an end portion of the resistive tip has a wedge shape.

Abstract: The present invention relates to an etchant for wet etching a wiring that includes copper, where the etchant includes approximately 5 to approximately 25 wt % of a peroxide, approximately 0.5 to approximately 5 wt % of an oxidant, approximately 0.1 to approximately 1 wt % of a fluoride-based compound and approximately 1 to approximately 10 wt % of a glycol. The etchant can provide an etching rate that is suitable to many processes, and produces an appropriate etching amount as well as an appropriate taper angle. In addition, the etchant exhibits advantages including relatively low viscosity as compared to phosphoric acid-based etchants, relatively uniform etching characteristics, and relative stability as compared to peroxide-based etchants.

Abstract: An insert clamp secures a cutting insert having a central hole to a tool holder. The clamp includes a forward protrusion to be received in the central hole of the insert, a central body portion provided with a pressing part to press down the upper surface of the insert and a screw hole for a clamping screw to pass through, and a rear protrusion having a rear contact surface to come in contact with a rearward slanting surface of the tool holder. The forward protrusion is formed on the forward end of the insert clamp, an inside surface of the forward protrusion extends downward in a spaced state apart from the inner wall of the central hole of the insert, and a distal portion of the inside surface the forward protrusion is provided with a protuberance of convex curved surface to come in tangential contact with the inner wall of the insert.

Abstract: A cutting insert has an upper surface, a lower surface, a plurality of side surfaces connecting the upper surface and the lower surface and a central hole formed at a central portion thereof. The cutting insert has a flat seating surface formed on a highest level of the upper surface, a plurality of side cutting edge portions formed at intersections of the upper surface and the side surfaces, and a corner cutting edge portion formed at an intersection of two adjacent side cutting edge portions and having a cutting edge formed at a front end thereof. A land portion, a downward inclined surface, a corner bottom surface, a first protrusion, an upward inclined surface and the seating surface are formed on the corner cutting edge portion sequentially along a diagonal line directed from the cutting edge to the central hole.

Abstract: A cutting insert for a machining tool has a structure capable of effectively controlling chips generated on a work-piece. The cutting insert includes an upper surface, a lower surface, a plurality of side surfaces connecting the upper surface and the lower surface and a central hole formed at a central portion thereof. In the cutting insert, a seating surface is formed on a highest portion of the upper surface, a plurality of side cutting edge portions are formed at border portions of the upper surface and the side surfaces. Each side cutting edge portion has a side cutting edge formed at an upper end thereof and a corner cutting edge portion is formed at an intersection of two adjacent side cutting edge portions.

Abstract: A ferroelectric recording medium and a writing method for the same are provided. The ferroelectric recording medium includes a ferroelectric layer which reverses its polarization when receiving a predetermined coercive voltage. A nonvolatile anisotrophic conduction layer is formed on the ferroelectric layer. A resistance of the anisotrophic conduction layer decreases when receiving a first voltage lower than the coercive voltage, and the resistance of the anisotrophic conduction layer increases when receiving a second voltage higher than the coercive voltage. Multi-bit information is stored by a combination of polarization states of the ferroelectric layer and the resistance of the anisotrophic conduction layer. Accordingly, multiple bits can be expressed on one domain of the ferroelectric recording medium.

Abstract: An information storage medium in which charges and electric dipoles are coupled with one another. The information storage medium includes a substrate, an electrode layer formed on the substrate, a ferroelectric layer formed on the electrode layer, and an insulating layer formed on the ferroelectric layer. Accordingly, it is possible to stably record information on the information storage medium.

Abstract: A micro actuator having separated stages and a data storage apparatus employing the same are provided. The micro actuator includes: a supporting unit; stages that are elastically supported by the supporting unit, each stage having a mounting surface where a target driven body is mounted thereon, and arranged adjacent to each other; levers which are disposed between the stages, each lever having two ends respectively connected to adjacent stages, and which apply force to the adjacent stages so that when one of the stages is moved, an adjacent stage is moved in an opposite direction to a moving direction of the moved stage; and driving units which respectively provide a driving force to the stages.

Abstract: A flat panel display device includes a folded bezel formed in a multi-layer structure. The flat panel display device is formed so that an electronic component of a flexible printed circuit board may be inserted into at least one opening formed at a location where the layers of the bezel correspond to one another. Thus, the electronic component inserted into the opening of the bezel has improved durability against external interference and impact, and the number of components and the number of processes can be reduced.

Abstract: A ferroelectric recording medium and a writing method for the same are provided. The ferroelectric recording medium includes a ferroelectric layer which reverses its polarization when receiving a predetermined coercive voltage. A nonvolatile anisotrophic conduction layer is formed on the ferroelectric layer. A resistance of the anisotrophic conduction layer decreases when receiving a first voltage lower than the coercive voltage, and the resistance of the anisotrophic conduction layer increases when receiving a second voltage higher than the coercive voltage. Multi-bit information is stored by a combination of polarization states of the ferroelectric layer and the resistance of the anisotrophic conduction layer. Accordingly, multiple bits can be expressed on one domain of the ferroelectric recording medium.

Abstract: Provided is an electric field information reading head for reading information from a surface electric charge of an information storage medium, the electric field information reading head comprising a semiconductor substrate having a resistance region formed in a central part at one end of a surface facing a recording medium, the resistance region being lightly doped with impurities, and source and drain regions formed on both sides of the resistance region, the source region and the drain region being more highly doped with impurities than the resistance region. The source region and the drain region extend along the surface of the semiconductor substrate facing the recording medium, and electrodes are connected electrically with the source region and the drain region respectively. In addition, provided is a method of fabricating the electric field information reading head and a method of mass-producing the electric field information reading head on a wafer.

Abstract: A method of manufacturing a thin film transistor substrate includes forming a transistor thin layer pattern, forming a protecting layer, forming a photoresist film, forming a pixel electrode and a conductive layer that are separated from each other, stripping a photoresist pattern to remove the conductive layer using a stripping composition and dissolving the conductive layer. The method of manufacturing a thin film transistor substrate is capable of improving an efficiency of manufacturing process of the thin film transistor substrate. In addition, the stripping composition is recycled.

Abstract: An information reproducing apparatus and a method using a semiconductor probe are provided. The information reproducing apparatus includes a semiconductor probe including a semiconductor tip including a channel varying with an electric field generated by an information recording medium; a modulator applying a high frequency modulation signal to the semiconductor probe to form a modulation electric field so as to modulate an information signal induced by the electric field; a signal detector detecting a signal generated by the semiconductor probe; and a demodulator extracting the information signal modulated by the modulation electric field from the signal detected by the signal detector.

Abstract: A composition for removing a photoresist pattern includes about 5 percent by weight to about 20 percent by weight of an aminoethoxy ethanol, about 2 percent by weight to about 10 percent by weight of a polyalkylene oxide, about 10 percent by weight to about 30 percent by weight of a glycol ether compound, and a remainder of an aprotic polar solvent including a nitrogen. Thus, the photoresist pattern can be easily removed from a substrate, thereby improving the removing ability of the composition. In addition, a residual amount of the photoresist pattern may be minimized, thereby improving the reliability of removing the photoresist pattern.

Abstract: Provided is a ferroelectric recording medium including a ferroelectric recording layer formed of a polarization reversal ferroelectric material and an anisotropic conduction layer that covers the ferroelectric recording layer and changes into a conductor or a non-conductor based on external energy.

Abstract: Provided are a method of and an apparatus for automatically setting a channel to achieve channel synchronization between a transmitter and a receiver in a wireless transceiver system. The transmitter stores information about a channel tuned according to an initial channel number, transmits a message indicating a completion of the channel information storage to a receiver, and transmits a next channel number in response to a message confirming the completion of a channel information storage performed in the receiver. The receiver receives a tuned channel number and the message indicating the completion of the channel information storage in sequence from the transmitter, stores channel information corresponding to the received tuned channel number, transmits the message confirming the completion of the channel information storage to the transmitter, and waits for the next channel number to be received from the transmitter.