Abstract: Disclosed is a keypad and method for fabricating same. The keypad comprises. at least one key top, a waveguide having an upper surface on which the key top is disposed and a lower surface on which a plurality of reflective patterns are formed to reflect part of light traveling in the waveguide toward the key top, a lower elastic layer disposed below the waveguide, and an upper elastic layer disposed on top of the waveguide so as to be interposed between the key top and the waveguide.

Abstract: An athermal arrayed-waveguide grating is disclosed and includes an input waveguide for inputting two or more optical signals from one exterior side, a grating array for separating the optical signals into different wavelengths of light, a first slab, formed with two layers and having different refractive indices from each other, for connecting the input waveguide with the grating array, a second slab for causing the different light wavelengths separated at the grating array to be imaged on an egress surface thereof, and an output waveguide array for outputting each light wavelength imaged on the egress surface of the second slab to the other exterior side in the form of a separated channel.

Abstract: This invention relates to a method of preparing cellulose solution which is homogeneous at relatively low temperature, in which a small amount of cellulose powder or polyvinylalcohol is dissolved in the liquid-state, concentrated N-methylmorpholine-N-oxide (hereinafter, referred to as ‘NMMO’) so as to lower the solidifying temperature of NMMO, and then, the resulting solution and cellulose powder are fed into an extruder so as to be mixed, swollen and melted in the extruder.

Abstract: This invention relates to a method of preparing cellulose solution which is homogeneous at relatively low temperature, in which a small amount of cellulose powder or polyvinylalcohol is dissolved in the liquid-state, concentrated N-methylmorpholine-N-oxide (hereinafter, referred to as ‘NMMO’) so as to lower the solidifying temperature of NMMO, and then, the resulting solution and cellulose powder are fed into an extruder so as to be mixed, swollen and melted in the extruder.

Abstract: The present invention relates to an expansion tube that has a plurality of expansion slits on the outer peripheral surface thereof long a longitudinal direction, each of the expansion slits having a predetermined width and a relatively larger length than the predetermined width, and an apparatus for manufacturing a heat shrinkable tube, having the expansion tube, that can regularly and fast expand the heat shrinkable tube, and after the expansion, regularly and fast cool the heat shrinkable tube by the cooling water sprayed through the slits, thereby rapidly and stably manufacturing the heat shrinkable.

Abstract: Disclosed herein is a cushioning material for packing an object, such as an electrical product, kitchen utensils, an industrial machine, etc., to protect it from outside shocks. In the cushioning material of the present invention, embossments defining spaces are formed in a synthetic resin film constituting the cushioning material, and porous elastic balls are provided in the respective spaces. Thus, the cushioning material of the present invention can be wound in a roll shape while the elastic balls are pressed and reduced in volume. Therefore, a large amount of cushioning material can be loaded when being carried, thereby logistics costs are markedly reduced. Furthermore, the cushioning material of the present invention may be received in a roll casing such that a user can easily handle the cushioning material.

Abstract: A Carbon NanoTube (CNT) structure includes a substrate, a CNT support layer, and a plurality of CNTs. The CNT support layer is stacked on the substrate and has pores therein. One end of each of the CNTs is attached to portions of the substrate exposed through the pores and each of the CNTs has its lateral sides supported by the CNT support layer. A method of vertically aligning CNTs includes: forming a first conductive substrate; stacking a CNT support layer having pores on the first conductive substrate; and attaching one end of the each of the CNTs to portions of the first conductive substrate exposed through the pores.

Abstract: An optical pickup includes a light source emitting a laser beam and an optical path changing unit altering a traveling path of an incident beam. An objective lens, disposed on an optical path between the optical path changing unit and an optical disk, focuses the incident beam from the light source to form a light spot on the optical disk of the objective lens. The optical pickup further includes a photodetector and an detecting-correcting unit, arranged on the optical path between the optical path changing unit and the objective lens, performing at least one of detecting the thickness of the optical disk and correcting aberration caused by thickness variations of the optical disk. The objective lens includes a first transmitting portion divergently transmitting an incident beam, where the first transmitting portion is at a relatively near-axis region from an optical axis of the objective lens.

Abstract: A plasma display panel having an opposed discharge structure that can improve discharge efficiency is disclosed.

Abstract: The present invention relates to a method of manufacturing a semiconductor device. A minute pattern is formed using a hard mask film of a series of a nitride film as an etch mask. Before a hard mask film removal process is performed, the step of performing given etching using an oxide film etchant is added to remove an abnormal oxide film on the nitride film. It is thus possible to effectively remove the hard mask film. Generation of voids in a pattern below the hard mask film can be also effectively prevented using BOE in which the composition ratio of HF and NH4F and an etching temperature are optimized as an oxide film etchant.

Abstract: A field effect transistor includes a gate that is formed in a channel region of an active region defined on a substrate. A source is formed at a first surface portion of the active region that is adjacently disposed at a first side face of the gate. A drain is formed at a second surface portion of the active region that is opposite to the first surface portion with respect to the gate. The drain has a protruded portion that is protruded from a surface portion of the substrate.

Abstract: A keypad assembly for a portable terminal is disclosed. The keypad assembly for the portable terminal includes a light guide plate which has reflection patterns locally formed on a lower surface of the light guide plate for reflecting a part of light transmitted in the light guide plate toward an upper surface of the light guide plate. The keypad assembly also includes at least one key button seated on the light guide plate, for outputting the light reflected by the reflection patterns out of the keypad assembly, upper and lower cases for containing the light guide plate, a switch substrate seated on a bottom surface of the lower case and having at least one switch, and an extension member which extends from an upper case of the portable terminal toward the switch substrate. The extension member has a reflection filter for reflecting the light exiting from the light guide plate toward the light guide plate back.

Abstract: An optical filter includes a body of a polyhedron structure in which a recess having a predetermined depth from one side surface is exposed on a front surface and a rear surface and a multi-layer thin film which is deposited on the front surface of the body to cover an exposed portion of the recess of the body.

Abstract: A key pad lighting apparatus for a portable terminal includes: a waveguide in which a plurality of key buttons are arranged at one surface thereof; at least one light source provided at one side of the waveguide for introducing the light into the waveguide; and a guide member surrounding the light source for preventing a discharge of the light and for guiding the light into the waveguide. The key pad lighting apparatus can uniformly illuminate the key buttons installed in the key pad with a few light source using less light sources which helps to reduce the power consumption.

Abstract: A method and apparatus for providing devices with job history information on image forming jobs are provided, in which job history information corresponding to image forming jobs of the devices are generated. The job history information is transmitted to any device selected from the devices.

Abstract: A dual port semiconductor memory device, including PMOS scan transistors, is provided. The dual port semiconductor memory device includes two PMOS transistors, two NMOS pull-down transistors, two NMOS pass transistors, and a PMOS scan transistor. The scan transistor being PMOS, noise margins can be improved. In addition, these seven transistors are arranged in two n-wells and 2 p-wells, while n-wells and p-wells are arranged in series and in alternating fashion. Therefore, the length of a memory cell along the minor axis of the memory cell is relatively short. This memory cell layout helps shorten the length of a bit line by arranging a pair of bitlines in parallel with well boundaries, i.e., in the direction of the short axis of the memory cell, and makes it possible to prevent crosstalk between a bitline and a complementary bitline by arranging conductive lines between the bitline and the complementary bitline.

Abstract: In a method of removing particles on an object, a fluid is injected into a spacer where the object is placed to remove foreign substances in the space. A first light is irradiated to the object to remove charges between an upper face of the object and the particles, and inner walls of holes and the particles. A second light is irradiated to the object to remove moisture droplets between the upper face of the object and the particles, and the inner walls of the holes and the particles. A third light is irradiated to the object to remove static electricity between the upper face of the object and the particles, and the inner walls of the holes and the particles. A fluid is applied to the upper face and the holes of the object to remove the particles from the object.

Abstract: A keypad assembly for a portable terminal is disclosed. The keypad assembly for the portable terminal includes a light guide plate which has reflection patterns locally formed on a lower surface of the light guide plate for reflecting a part of light transmitted in the light guide plate toward an upper surface of the light guide plate. The keypad assembly also includes at least one key button seated on the light guide plate, for outputting the light reflected by the reflection patterns out of the keypad assembly, upper and lower cases for containing the light guide plate, a switch substrate seated on a bottom surface of the lower case and having at least one switch, and an extension member which extends from an upper case of the portable terminal toward the switch substrate. The extension member has a reflection filter for reflecting the light exiting from the light guide plate toward the light guide plate back.