Abstract: An analytic structure includes a plurality of analytic fields formed on a predetermined region of a semiconductor substrate; semiconductor transistors arranged in the analytic fields to compose an array structure, each transistor having a gate electrode and an impurity region; wordlines arranged crosswise on the analytic fields and connecting the semiconductor transistors; and bitline structures connecting the impurity regions of the semiconductor transistors lengthwise, each bitline structure having a bitline and a vertical interconnection structure connecting the bitline with the impurity region. The bitlines have different heights according to their positions on the analytic fields.

Abstract: Disclosed herein is a quantum dot phosphor for light emitting diodes, which includes quantum dots and a solid substrate on which the quantum dots are supported. Also, a method of preparing the quantum dot phosphor is provided. Since the quantum dot phosphor of the current invention is composed of the quantum dots supported on the solid substrate, the quantum dots do not aggregate when dispensing a paste obtained by mixing the quantum dots with a paste resin for use in packaging of a light emitting diode. Thereby, a light emitting diode able to maintain excellent light emitting efficiency can be manufactured.

Abstract: A method for preparing cadmium sulfide nanocrystals emitting light at multiple wavelengths. The method comprises the steps of (a) mixing a cadmium precursor and a dispersant in a solvent that weakly coordinates to the cadmium precursor, and heating the mixture to obtain a cadmium precursor solution, (b) dissolving a sulfur precursor in a solvent that weakly coordinates to the sulfur precursor to obtain a sulfur precursor solution, and (c) feeding the sulfur precursor solution to the heated cadmium precursor solution maintained at a high temperature to prepare cadmium sulfide crystals, and growing the cadmium sulfide crystals. Further, cadmium sulfide nanocrystals prepared by the method. The cadmium sulfide nanocrystals have uniform size and shape and can emit light close to white light simultaneously at different wavelengths upon excitation. Due to these characteristics, the cadmium sulfide nanocrystals can be applied to white light-emitting diode devices.

Abstract: A method for preparing a multilayer of nanocrystals. The method includes the steps of (i) coating nanocrystals surface-coordinated by a photosensitive compound, or a mixed solution of a photosensitive compound and nanocrystals surface-coordinated by a material miscible with the photosensitive compound, on a substrate, drying the coated substrate, and exposing the dried substrate to UV light to form a first monolayer of nanocrystals, and (ii) repeating the procedure of step (i) to form one or more monolayers of nanocrystals on the first monolayer of nanocrystals. Further, an organic-inorganic hybrid electroluminescence device using a multilayer of nanocrystals prepared by the method as a luminescent layer. The luminescent efficiency and luminescence intensity of the electroluminescence device can be enhanced, and the electrical properties of the electroluminescence device can be controlled by the use of the multilayer of nanocrystals as a luminescent layer.

Abstract: A wavelength stabilization module having a light-receiving element array and a method of manufacturing the same are disclosed.

Abstract: A system for monitoring an optical output/wavelength is employed to be used for a WDM system having a narrow channel space by structuring an etalon and photodiode as an integrated structure.

Abstract: A white light-emitting organic-inorganic hybrid electroluminescence device which has nanocrystals as illuminants. According to the device, a semiconductor nanocrystal layer composed of at least one kind of nanocrystals, a hole transport layer and/or an electron transport layer simultaneously emit light to produce white light, or a semiconductor nanocrystal layer composed of at least two kinds of nanocrystals emits light at different wavelengths to produce white light. The device can be used as a backlight unit for a liquid crystal display, or can be used to manufacture an illuminator.

Abstract: Disclosed herein is a method for manufacturing metal sulfide nanocrystals using a thiol compound as a sulfur precursor. The method comprises reacting the thiol compound and a metal precursor in a solvent to grow metal sulfide crystals to the nanometer-scale level. Further disclosed is a method for manufacturing metal sulfide nanocrystals with a core-shell structure by reacting a metal precursor and a thiol compound in a solvent to grow a metal sulfide layer on the surface of a core. The metal sulfide nanocrystals prepared by these methods can have a uniform particle size at the nanometer-scale level, selective and desired crystal structures, and various shapes.

Abstract: A nanocrystal electroluminescence device comprising a polymer hole transport layer, a nanocrystal light-emitting layer and an organic electron transport layer wherein the nanocrystal light-emitting layer is independently and separately formed between the polymer hole transport layer and the organic electron transport layer. According to the nanocrystal electroluminescence device, since the hole transport layer, the nanocrystal light-emitting layer and the electron transport layer are completely separated from one another, the electroluminescence device provides a pure nanocrystal luminescence spectrum having limited luminescence from other organic layers and substantially no influence by operational conditions, such as voltage. Further, a method for fabricating the nanocrystal electroluminescence device.

Abstract: Coffee maker and microwave oven and method for controlling the same are disclosed. The coffee maker and microwave oven includes an outfit room for mounting various electric components on an inside thereof, a case at one side of the outfit room, a water tank in the case, a funnel having a filter placed thereon for extraction of coffee, a jug under the funnel for storage of extracted coffee, a water supply pipe having one end connected to the water tank, the other end position over the funnel, and a portion on a bottom of the case, and a heater assembly on the bottom of the case, the heater assembly having a heating heater for heating potable water passing through the water supply pipe, and a heat conservation heater for heating coffee in the jug to maintain a temperature of the coffee constant.

Abstract: A semiconductor package test board for conveniently testing a fine ball pitch ball grid array package is provided. The provided semiconductor package test board includes a socket contact unit formed of a plurality of layers, to which a socket having the semiconductor package is connected, wherein the pitch between holes to which pins of the socket are connected increases from the upper surface to the lower surface in the socket contact unit. The holes in the socket contact unit are inclined toward the edges of the socket contact unit, and the angle of inclination of the holes increases from the center of the socket contact unit to the edges of the socket contact unit. Therefore, the holes are formed such that the ball pitch increases from the top layer to the bottom layer. As a result, the socket having the semiconductor package can be directly mounted on the test board without additionally mounting the sub test board (the socket board).

Abstract: A system for monitoring an optical output/wavelength is employed to be used for a WDM system having a narrow channel space by structuring an etalon and photodiode as an integrated structure.

Abstract: Microwave oven including a case with a door, a cooking chamber in the case openable/closable with the door, and having a microwave applicable thereto, a first tray mounted in the cooking chamber to reciprocate therein, a second tray rotatably mounted on the first tray, and a link engaged with the motor and the first tray such that the first tray reciprocates within the cooking chamber, and further engaged with the motor and the second tray such that the second tray rotates with respect to the first tray.

Abstract: A wavelength stabilization module having a light-receiving element array and a method of manufacturing the same are disclosed.

Abstract: A semiconductor package test board for conveniently testing a fine ball pitch ball grid array package is provided. The provided semiconductor package test board includes a socket contact unit formed of a plurality of layers, to which a socket having the semiconductor package is connected, wherein the pitch between holes to which pins of the socket are connected increases from the upper surface to the lower surface in the socket contact unit. The holes in the socket contact unit are inclined toward the edges of the socket contact unit, and the angle of inclination of the holes increases from the center of the socket contact unit to the edges of the socket contact unit. Therefore, the holes are formed such that the ball pitch increases from the top layer to the bottom layer. As a result, the socket having the semiconductor package can be directly mounted on the test board without additionally mounting the sub test board (the socket board).

Abstract: A BGA semiconductor package including: a semiconductor chip on which a chip pad is formed; a flexible member formed on the semiconductor chip; a metal pattern formed on one surface of the flexible member; a connection member for electrically connecting the pad and the metal pattern; and an external terminal electrically connected to the metal pattern. A method for fabricating the BGA semiconductor package including the steps of: fabricating a flexible member; forming a metal pattern on one surface of the flexible member; forming a pad on one surface of the semiconductor chip; attaching the flexible member onto the semiconductor chip in a manner that the pad is exposed; electrically connecting the pad and the metal pattern; and attaching an external terminal onto a predetermined region of the metal pattern.

Abstract: A method of preparing N,N-disubstituted 3,3′-dithiodipropionamide of formula (2) is provided. In the method, 3-mercaptopropi-onamide of formula (4) reacts with an aqueous solution of amine to prepare N-substituted-3-mercaptopropionamide of formula (3) and N-substituted-3-mercaptopropionamide reacts with an aqueous solution of hydrogen peroxide. In addition, a method of preparing substituted 3-isothiazolone is provided.

Abstract: A power semiconductor device and a method for fabricating the same are provided. The power semiconductor device includes a source structure having a projected portion with a tip-shaped end portion on its center and formed so as to surround a predetermined region of right and left and upper portions of the projected portion. Two drain structures are formed in a predetermined region surrounded by the source structure. Extended drain structures are formed around the drain structures and the extended drain structures function as a channel with a field effect channel between sides of the projected portion of the source structure. Accordingly, since there are no drain structures on the tip of the projected portion of the source structure, although a radius of curvature of the tip of the projected portion is small, a decrease in a breakdown voltage of a device due to the small radius of curvature of the tip of the projected portion can be suppressed.

Abstract: A virtual space search interface is provided to search a three-dimensional virtual space image by the visual angle of a virtual user immersed therein. The virtual space search interface engine interfaces the movement of the virtual user so as to adjust it with a mouse in such a way as the movement of a visual line of the body, displays an ICON which can adjust a three-dimensional motion with a mouse on the main image in which the search is made and enables the ICON to search a three-dimensional virtual space image by selecting an element of changes of a gaze, controlling changes of movement in horizon, its moving speed and 2-dimensional movement of neck. Consequently, movement is more free than the use of various ICONs. Since the user is well acquainted with the ICON which represents the body, the user knows what manipulation is good and when such manipulation can be executed so that a virtual space can be searched easily.

Abstract: A BGA semiconductor package including: a semiconductor chip on which a chip pad is formed; a flexible member formed on the semiconductor chip; a metal pattern formed on one surface of the flexible member; a connection member for electrically connecting the pad and the metal pattern; and an external terminal electrically connected to the metal pattern. A method for fabricating the BGA semiconductor package including the steps of: fabricating a flexible member; forming a metal pattern on one surface of the flexible member; forming a pad on one surface of the semiconductor chip; attaching the flexible member onto the semiconductor chip in a manner that the pad is exposed; electrically connecting the pad and the metal pattern; and attaching an external terminal onto a predetermined region of the metal pattern.