baber/WOPTO huggingface dataset:
Patent KR-20020055196-A (KR)
Title: A method of forming trench isolation layer in semiconductor device
Inventor: KIM SEON U
IPC: H01L21/76
Filed: 2000-12-28
Abstract: PURPOSE: A method for fabricating a trench isolation layer of a semiconductor device is provided to guarantee productivity, by preventing dopants of a channel region from being diffused to an isolation layer and by control an increase of a leakage current and a peeling phenomenon of a trench mask. CONSTITUTION: A trench mask pattern is formed on a silicon substrate(10). The trench is formed in the silicon substrate by an etch process using the trench mask pattern. A liner silicon nitride layer is formed along the surface of the resultant structure. A high density plasma(HDP) oxide layer is deposited on the resultant structure, wherein a radio frequency(RF) bias is applied from the initial stage of deposition of the HDP oxide layer so that the liner silicon nitride layer is left only on the sidewall of the trench.
Patent KR-20010062840-A (KR)
Inventor: MAEENPAEAE JARI
IPC: G06F3/038
Filed: 2000-12-29
Abstract: PURPOSE: A system and a method using a data processor is provided to use several computers having one wireless keyboard and one wireless mouse and to set up a share clipboard. CONSTITUTION: In this invention, data processors(1a,1b,1c) are controlled by at least one unit of controllers(2,3). At least a pair of local communication means(4) are connected with each data processor(1a,1b,1c), and at least a pair of local communication means(4) are also connected with each controllers(2,3). The local communication means(4) is connected with the controllers(2,3) and the processors(1a,1b,1c) and communicate to each other by radio. In this way, at least one unit of the controllers(2, 3) control at least two units of data processors(1a,1b,1c) wirelessly.
Patent KR-20010023547-A (KR)
IPC: B65D5/72
Filed: 1998-08-26
Abstract: 용기용 주입기로서, 주입기 (5)는 제 1 배면부 (15a), 제 2 정면부 (20a) 및 용기와 결합하여 주입기를 보유하는 수단을 포함하고, 제 1 비-주입 위치에 있을 때, 제 2 부분은 용기와 밀봉적 맞물림 상태에 있고, 한편 사용시, 제 1 부분을 누르면, 제 2 부분의 적어도 일부가 제 1 비-주입 위치로부터 제 2 주입위치로 이동하게 한다.  제 1 부분에 대한 누름을 해제하는 것은 상기 제 2 부분으로 하여금 상기 제 1 비-주입 위치로 되돌아오게 한다.  주입기는 차량용 엔진에 오일을 주입하는데 사용하는 것이 바람직하다.  주입기는 손댄 흔적을 나타내는 수단을 포함한다.  주입기는 용기로부터 오일의 유동률을 조절하는데 사용할 수 있다.
Patent KR-20010031383-A (KR)
Title: 낮은 중간 주파수 수신기
IPC: H04B1/10
Filed: 1999-08-18
Abstract: 셀 방식 전화와 무선 전화 및 TV 튜너에서 사용하기에 적합한 낮은 중간 주파수 수신기는, 입력 신호 수신 수단(10), 입력 신호 수신 수단에 연결된 제 1입력(12, 13)을 가지는 제 1 및 제 2 혼합 수단(14, 15)을 포함하는 직교 관련 주파수 다운 변환 수단 및 상기 제 1 및 제 2 혼합 수단의 제 2 입력(18, 19)에 연결된 입력 신호의 공칭 중심 주파수로부터 오프셋된 주파수를 가지는 국부 발진기 신호를 발생시키기 위한 국부 발진기 수단(16), 상기 제 1 및 제 2 혼합 수단의 출력으로부터 원하는 채널 신호를 선택하기 위한 채널 선택도 다위상 필터링 수단(20), 큰 인접 채널 간섭 성분으로 인해 주파수 다운 변환된 신호가 용인될 수 없게 될 때를 검출하기 위한 수단(26, 28, 30), 및 상기 검출에 응답하여 상기 채널 선택도 다위상 필터링 수단(20)의 대역폭 외부로 상기 큰 간섭 성분을 변위시키도록 상기 국부 발진기 주파수를 최소한 2배의 낮은 중간 주파수 또는 하나의 채널 대역폭만큼 변화시키며 동시에 상기 다위상 필터의 중심 주파수를 변경시키기 위한 수단을 포함한다.
Patent KR-20010032231-A (KR)
Title: 이동 전화기에서 간략화된 기준 주파수 분포
IPC: H04B1/40
Filed: 1998-11-03
Abstract: 간략화된 설계를 갖는 이동 무선 전화기는 감소된 수의 집적 회로와 감소된 수의 RF 연결을 포함한다.  양자 택일의 심볼 레이트, 채널 스페이싱 (channel spacing), 또는 전송/수신 듀플렉스 스페이싱 (duplex spacing)이 이루어질 수 있도록 단일 크리스탈 (crystal) 기준 발진기 또는 2개의 크리스탈을 사용하여 이중 대역 이중 모드 (dual band, dual mode) 이동 전화기가 구성될 수 있다.
Patent KR-20010033707-A (KR)
Inventor: HIMMELMAN GUNILLA
IPC: A61F13/15
Filed: 1998-12-29
Abstract: Absorbent structure in an absorbent article such as a diaper, sanitary napkin, incontinence guard, wound dressing, bed protection, etc., said structure containing a superabsorbent material possibly in combination with other absorption- or carrier materials and where the superabsorbent material has a content of renewable and/or biodegradable raw material of at least 20 % by weight, calculated on the dry weight of superabsorbent material, and has a phase angle delta<=8° defined as the phase shift between deformation and strain measured at rheological measurements.
Patent KR-20010040649-A (KR)
IPC: B29C45/14
Filed: 1999-02-03
Abstract: A method of fabricating a support provided with shielding against interfering radiation, such as electromagnetic radiation, according to the invention involves a metallized plastic substrate, the metal comprising tin, being placed into an injection mould, and a plastic being injected into the mould to form the support. The tin-coated plastic substrate can be deformed very readily, so that it can be deformed three-dimensionally without its shielding characteristics being impaired.
Patent KR-20010041691-A (KR)
Title: 신호포착 및 전력제어 방법 및 장치
IPC: H04B1/7115
Filed: 1999-01-22
Abstract: 호출 설정 과정(200)은 신속하고 확실한 프리앰블 신호포착 및 확인응답 절차(400)를 갖는다.  이 절차(400)는 우선 프리앰블 신호를 높은 확률로 식별하고, 신호포착을 검증하기 위한 다단계 탐색 기술이다.  이 절차(400)는 개선된 호출 설정 처리를 위해 전력제어(408, 426, 428), 및 레이트 판정(430) 기능을 더 포함한다.
Patent KR-20010042585-A (KR)
Title: 복합 자성체
IPC: H01F41/02
Filed: 2000-01-31
Abstract: 쵸크 코일 등에 사용되는 본 발명에 따른 복합 자성체는, 철(Fe) 및 니켈(Ni)을 주성분으로 하는 자성 합금 분말, 절연재, 및 이들을 결합시키기 위한 실리콘 수지 또는 아크릴 수지로 이루어진 결합제를 혼합하고 압축성형하여 이루어진다.  이러한 복합 자성체는, 높은 자성 합금 분말 충진율과 절연성이 양립하여 낮은 코어 손실과 높은 자기투과율이 실현되고, 또한 복잡형상의 코어형성이 가능하다.
Patent KR-20010042985-A (KR)
Title: 강판, 용융 도금 강판 및 합금화 용융 도금 강판과 이들의제조 방법
IPC: C22C38/04
Filed: 2000-02-21
Abstract: 본 발명은 소재 강편(鋼片)을 열간 압연한 후, 흑피 스케일을 부착시킨 채, 실질적으로 환원이 일어나지 않는 대기 중에서 650 내지 950℃의 온도 범위에서 열처리를 행함으로써, 강철의 성분 조성이나 제조 이력을 막론하고, 또한 용융 도금 처리전의 재결정 소둔에 복사관 등의 복사식 가열을 이용한 경우라도, 강판의 페라이트 표층부에 충분한 내부 산화층을 형성할 수 있으며, 그 결과 도금용 강판에 대해서 우수한 용융 도금성 및 화성 처리성을 부여할 수 있다.
Patent KR-20010043701-A (KR)
Title: 근단 누화를 보상하기 위한 전기 플러그와 소켓 접속용콘택트 쌍의 배치
IPC: H01R24/00
Filed: 1999-05-12
Abstract: 본 발명은, 자가-임브리케이트된(self-imbricated) 콘택트 쌍에서 근단 누화를 보상 하기 위해서, 전기 플러그와 소켓 접속, 특히 RJ-45 플러그와 소켓 접속을 위한 콘택트 쌍(1,2;3,6;4,5;7,8;201,202;203,206;204,205;207,208) 배치한 것이다.  보상을 가능하게 하기 위해서, 콘택트(4,5)는 교차된다.  교차점(11)은 소켓 콘택트(1,2;3,6;4,5;7,8)의 스프링 탑재부에 위치된다.
Patent KR-20010043880-A (KR)
Title: 백색 탄성중합체 밀봉 재료 및 그의 제조 방법
IPC: C08K3/22
Filed: 1999-05-28
Abstract: 본 발명에서는 퍼플루오로탄성중합체 및 백색 안료를 포함하는 조성물로부터 성형되고, 2°시야 및 C-광원의 조건에서 W(Lab) 색 표현법으로 나타낼 때 백도가 90 이상인 표면을 갖는, 내구성 및 백도가 높은 백색 탄성중합체 밀봉 재료; 및 퍼플루오로탄성중합체 및 백색 안료를 포함하는 조성물로부터 밀봉 재료를 성형해내고, 이 성형된 밀봉 재료를 과산화수소 수용액에 침지시키거나, 밀봉 재료에 자외선을 조사시키거나, 밀봉 재료를 오존에 노출시키는 것을 포함하는, 2°시야 및 C-광원의 조건에서 W(Lab) 색 표현법으로 나타낼 때 백도가 75보다 큰 표면을 갖는 밀봉 재료를 제조하는, 생산성 높은 방법이 제공된다.
Patent KR-20010107521-A (KR)
Title: 반도체 장치
IPC: H01L27/108
Filed: 2001-01-03
Abstract: 본 발명은 제조가 용이하고 고집적화가 가능하며, 메모리 셀과 논리 셀을 포함한 기본 단위를 동일 반도체 기판 상에 복수개 갖는 반도체 장치를 제공하는 것을 과제로 한다. 
     본 발명의 반도체 장치는, 반도체 기판 상에 형성되어 메모리 소자와 논리 소자를 포함한 동일 또는 대칭적인 복수의 단위 구조를 갖는 반도체 장치로서, 각 단위 구조가 제 1 활성 영역에 형성된 DRAM 셀과, 제 2 활성 영역에 형성되어 제 2 및 제 3 게이트 전극과 실리사이드층을 구비한 소스/드레인 영역을 갖는 논리 소자용 직렬 접속 트랜지스터와, 그 한 쌍의 소스/드레인 영역에 접속된 제 1 및 제 2 신호선과, 제 2 게이트 전극에 접속된 제 3 신호선과, DRAM 커패시터의 축적 전극 아래쪽에 형성되어 축적 전극과 제 3 게이트 전극을 접속하는 도전성 접속부재를 갖는다.
Patent KR-20020060323-A (KR)
Inventor: LEE CHANG HUN
IPC: F16K31/06
Filed: 2001-01-10
Abstract: PURPOSE: A solenoid valve is provided to improve the performance of the valve, to reduce the production cost by reducing the length of processing, and to improve work efficiency. CONSTITUTION: A solenoid valve includes an upper body(1) having an inlet port(1a) and an outlet port(1b), a core(3) forming a space portion and a core wing(3b) coupled to a case(7), a rod body(2) disposed in a through hole of the core, a bobbin(6) winding a coil producing magnetomotive force to operate a plunger(4), and the case covering the outside of the bobbin. The rod body comprises an upper rod(2c), disposed in the through hole, controlling flow of fluid and a lower rod(2e), connected at the lower end of the upper rod. The lower end portion of the lower rod is inserted into a through hole(4b) of the plunger disposed at the bottom of the core. The rod body composed of the core, core wing, and the upper and lower rod is formed into an integrated shape by single processing. Therefore, the number of parts is reduced and the production cost is reduced.
Patent KR-20020067322-A (KR)
Title: Auto output control method and apparatus of laser diode
Inventor: JIN GYEONG BOK
IPC: G11B7/125
Filed: 2001-02-16
Abstract: PURPOSE: A device and a method for automatically controlling outputs of a laser diode are provided to control the laser diode with an optimum state, so as to effectively cope with high-speed and high capacity optical recording and playback apparatuses and contributes to the performance improvement and miniaturization of the optical recording and playback apparatuses. CONSTITUTION: In an automatic laser diode outputs control device that compares a current power value of optical signals output from the laser diode(318) with a reference power value and controls the outputs of the laser diode, a sampling unit samples the current power value output from the laser diode. A register unit(308) stores outputs of the sampling unit. A reference register unit(310) stores the reference power value. An operation unit(312) outputs a target output value supplied to the laser diode, based on the current power value and the reference power value respectively stored in the register unit and the reference register value. And a pulse generator(320) generates a control signal controlling storage timing of the register unit.
Patent KR-20020072143-A (KR)
Title: Lactobacillus for improving weight gain and environmental condition in brolier
Inventor: KIM SANG HO
IPC: C12N1/20
Filed: 2001-03-09
Abstract: PURPOSE: Lactic acid bacteria isolated from the caecum of poultry and a feed for poultry containing them are provided. The lactic acid bacteria have acid tolerance and bile tolerance, and increase the weight of poultry. CONSTITUTION: Lactobacillus crispatus avibro 1(KFCC-11195) and Lactobacillus reuteri avibro 2(KFCC-11196) isolated from the caecum of poultry have tolerance to both acid and bile, and increase the weight of poultry and decrease the generation of ammonia gas from feces of poultry. The feed for poultry contains the Lactobacillus crispatus avibro 1(KFCC-11195) and Lactobacillus reuteri avibro 2(KFCC-11196) in the amount of 104 to 107 cfu/g of the feed.
Patent KR-20010069337-A (KR)
Title: Dual Industrial Structure Tabricative a Vinyl House
Inventor: PARK SUNG HOON
IPC: A01G9/16
Filed: 2001-03-09
Abstract: PURPOSE: Disclosed is a fabricated vinyl house with double structure to raise assembly character and tensile strength by changing frame pipe shape to quadrangle, to raise thermal character by making vinyl house structure with a double and to raise stability as fixing pipe by using post prop to the pipe bottom simultaneously. CONSTITUTION: The fabricated vinyl house with double structure is characterized by making shape of frame pipe(1,2,3) to quadrangle; penetrating crossbar pipe(4) into frame pipe(1,2); assembling frame pipe(1,2) and crossbar pipe(4) with drill screw; being supported in the ground as sticking post prop(7) to the bottom of frame pipe(1,2); covering vinyl(6) again by assembling double frame pipe(3) on the surface after covering vinyl(6) on the frame pipe(1,2).
Patent KR-20010092341-A (KR)
Title: Soft Capsules Comprising Polymers of Vinyl Esters and Polyethers, the Use and Production Thereof
Inventor: ANGEL MAXIMILIAN
IPC: A61K47/30
Filed: 2001-03-14
Abstract: PURPOSE: Provided are a material for soft capsules which can be obtained without the addition of an additional plasticizer and is better than gelatin, and the like, an its use, and a production method. CONSTITUTION: The soft capsules comprise (a) a polymer produced by polymerizing a vinyl ester in the presence of a polyether, if necessary (b) a structure-improving auxiliary, and if necessary (c) other conventional components. The polymer(a) is prepared by free-radical polymerizing at least one of vinyl ester of C1-C24 carboxylic acids(i) in the presence of polyether-containing compound(ii), and if necessary at least one copolymerizable monomers, and at least partially hydrolyzing an ester functionality of the first monomer(i).
Patent KR-20010090449-A (KR)
Title: Improved integrated torque motor and throttle body
Inventor: HATTON BRUCE MICHAEL
IPC: F02D9/10
Filed: 2001-03-16
Abstract: PURPOSE: An electrically operated throttle valve assembly, and torque motor assembly and method of making torque motor assembly is provided to reduce bending moment of the throttle shaft and improve response time, while allowing for more magnetic flux for a given motor size. CONSTITUTION: An electrically operated throttle valve assembly(110) has a throttle shaft(18) with a portion extending exteriorly of a throttle body(12). A rotor(166) is mounted on the extending portion of shaft. A housing(80) concentrically surrounds the rotor and includes a rear wall(86) to which a stator(134) is attached. The stator having a plurality of circumferentially spaced pole segments each with a coil is mounted to the rear wall and is concentrically disposed within the rotor. The hollow cylindrical rotor with plural magnets disposed about the inner periphery has a radial web flange(168) which is drivingly attached to one end of the extending portion of shaft with the rotor nested over the stator pole segments. Reducing the size or even eliminating the mounting shaft or a bolt(92), and preferably replacing it with a welded, wound and over-molded stack of lamination provides more winding area for electrically conductive coils to provide more magnetic flux.
Patent KR-20020073999-A (KR)
Title: Isolation in bipolar transistor and method of forming thereof
Inventor: LEE SANG MUN
IPC: H01L21/76
Filed: 2001-03-19
Abstract: PURPOSE: An isolation region of a bipolar transistor and a method for forming the same are provided to reduce the area of isolation region by using double isolation regions. CONSTITUTION: Impurity ions of a first conductive type are implanted in a semiconductor substrate(300). An epitaxial layer(340) of a second conductive type is formed on entire surface of the semiconductor substrate(300). A first isolation region(350) made of an impurity diffusion region is formed by diffusion the impurity ions. A trench is formed to expose the impurity diffusion region. After forming a trench oxide(380), a polysilicon layer of a first conductive type is filled into the trench, thereby forming a second isolation region(375).
Patent KR-20020069079-A (KR)
Title: A roasting plate capable of oil discharging
Inventor: OH HWA TEAK
IPC: A47J37/06
Filed: 2001-03-23
Abstract: PURPOSE: An oil receiving structure for a stone pan is provided to rapidly remove oil generated from meat when roasting the meat by installing a plurality of oil receiving slots at a lower surface of the stone pan. CONSTITUTION: A plurality of oil receiving slots(30) is connected to one side of an inner peripheral portion of a body(20) on which a stone pan is loaded. An oil discharging port(40) is provided so as to discharge oil received in the oil receiving slots(30). The oil receiving slots(30) are inclined with respect to the stone pan. A plurality of protrusions is formed at a lower end of the oil discharging port(40) to prevent oil from flowing along a lower surface of the oil discharging port(40). A supporting leg is provided at a lower portion of the oil receiving slots(30) in order to support the stone pan. An oil draining hole(50) is formed at one side of the body(20) so as to guide oil into the oil discharging port(40).
Patent KR-20020075021-A (KR)
Inventor: KIM SU JIN
IPC: A61B5/02
Filed: 2001-03-23
Abstract: PURPOSE: An electronical blood pressure measurement apparatus is provided to measure and store automatically a blood pressure, a pulse rate, and a blood distribution graph and manage a client by using the stored data. CONSTITUTION: A control computer(102) is used for transmitting and receiving data or managing a client's data by an RS232C. The control computer(102) is connected to a printer(110) by using an infrared couple. A system control portion(200) is used for receiving or transmitting the data from or to the control computer(102) and supplying or stopping air by the RS232C. An air control portion(300) is used for driving a relay and a motor to increase or reduce a blood pressure according to a control signal of the system control portion(200). An emergency control portion(400) is used for releasing an operation of an electronical blood pressure measurement apparatus by a user's operation when a state of emergency is generated during an operating process of the air control portion is operated. A power supply portion(500) receives a power source from the outside and distributes the power source.
Patent KR-20020076085-A (KR)
Inventor: KIM KYONG BOK
IPC: H05B3/10
Filed: 2001-03-27
Abstract: PURPOSE: An apparatus using carbon material is provided to improve the usage of the carbon material by supplying power to end-to-end and end-to-middle of the carbon material. CONSTITUTION: A carbon-material utilizing apparatus includes a carbon material(11). A distributing switch(30) is connected to the carbon material(11). The distributing switch(30) supplies power to the carbon material(11) and blocks the power supplied thereto. An insulator isolates the carbon material(11) from another material having the conductivity. A thermal conductor transfers heat generated by the carbon material(11). A battery(100) supplies power to the carbon material(11) through a wiring. An incoming line is connected to a power source and supplies power to the carbon material(11). The incoming line replaces the wiring connected to the carbon material(11) that generates the heat. The carbon-material utilizing apparatus includes bedclothes, paper floors, and floor cushions.
Patent KR-20020076382-A (KR)
Title: A multi-lingual low power wireless transmission and receiving apparatus to locate to user location and the method to transmit and receive low power broadcasting
Inventor: LEE RAE CHUN
IPC: H04H20/48
Filed: 2001-03-28
Abstract: PURPOSE: A wireless broadcasting transmitting, receiving device outputting multi languages capable of recognizing user position is provided to exactly receive information in various languages by a receiving device, and to recognize a user's position on a map where the position is marked with coordinates, thereby easily confirming a present position on a map. CONSTITUTION: A wireless broadcasting transmitting device comprises first language to N language guides, coordinates, map code files(110-510), operating programs(120-520) and control programs(130-530), D/A converters(140-540), FM modulators(150-550), a signal mixer(1000), and a wireless transmitter(1010). The operating programs(120-520) and the control programs(130-530) control the map code files(110-510). The D/A converters(140-540) convert digital signals of the read files(110-510) into analog signals in a program order. The FM modulators(150-550) FM-modulate the analog signals. The signal mixer(1000) mixes the modulated signals. The wireless transmitter(1010) transmits the mixed signals to wireless receivers(2000-2050).
Patent KR-20020066160-A (KR)
Title: a heating device for heat-accumulation material using heat-concentration portion of heat-accumulation midnight electric boiler
Inventor: KWON SE WON
IPC: F24H7/04
Filed: 2001-03-29
Abstract: PURPOSE: A thermal storage material heating apparatus is provided to save the cost and to improve the performance of the thermal storage material heating apparatus by installing a separate heat collecting section at a periphery of a heater accommodated in a thermal storage tank. CONSTITUTION: Heaters(3,3') are installed at one side of an inner portion of a thermal storage tank(2) formed with an insulation layer(1). An inlet pipe(5) equipped with a draining pipe(4) and a circulation pump(10) is provided by passing through the thermal storage tank(2). A cylindrical member(7) formed with a plurality of pores is installed at a periphery of the heater(3). A heat collecting section(8) is formed between the cylindrical member(7) and the heater(3). Inlet pipes are branched by means of 3-way valve(9). One of the inlet pipes is connected to a middle part of the draining pipe(4), and the other of the inlet pipes passes through the thermal storage tank(2).
Patent KR-20020078043-A (KR)
Title: Scheme of DRAM Data Line Redundancy
Inventor: BANG YEONG SEOK
IPC: G11C29/00
Filed: 2001-04-04
Abstract: PURPOSE: A structure of redundancy in a DRAM data lines is provided to improve repair efficiency by reducing an unnecessarily exchanged number of cells and increasing the number of repairable cells. CONSTITUTION: One word line is selected from word lines of n number according to a low decoder in an mxn memory cell array(41) in which data are stored. The bit line sense amplifier(42) is used for receiving the memory data of m bits and amplifying the received data of m bits. A column selection process(43) is executed by a column address. One bit line sense amplifier(42) selected from the bit line sense amplifiers(42) of m number is connected with a data input/output line(data in/out). A shift switch defect repair block(44) is used for connect data lines with the data input/output(data in/out) by using a redundancy cell instead of a bad cell. A bad data line recognition portion(45) is used for outputting a signal to the shift switch defect repair block(44) in order to relieve different data lines for corresponding cells of different low banks.
Patent KR-20020081962-A (KR)
Title: Washer fluid reserve tank with a elastic funnel
Inventor: YANG TAE GEOL
IPC: B60S1/50
Filed: 2001-04-21
Abstract: PURPOSE: A washer liquid storage tank having a flexible funnel is provided to easily inject the washer liquid without regard to the location of a storage tank or the shape of an inject hole by installing a flexible funnel in the inject hole of the washer liquid storage tank. CONSTITUTION: A washer liquid storage tank having a flexible funnel comprises a storage tank body(12), an inject hole(20) formed in the upper portion of the body, a funnel(30) received in the inject hole, and an inject hole cap(40) for closing the inject hole. The funnel comprises a head part(34), a grip(32), and a corrugated part(36). The corrugated part is made of a thin elastic material. According to the corrugated part of the funnel, a washer liquid is injected conveniently. An inclined part is formed in the neck of the body to prevent the funnel from falling into the body.
Patent KR-20020083651-A (KR)
Title: Preparation of ZnO Powder by Pyrophoric Synthesis Method
Inventor: PAK CHONG SIK
IPC: C01G9/02
Filed: 2001-04-27
Abstract: PURPOSE: Provided is a method for preparing high purity and nano-size zinc oxide(ZnO) powder reproducibly by ignition reaction which supplements conventional dry and wet methods, and removes impurities easily. CONSTITUTION: The preparation method of ZnO powder, being less than 1micrometer in size, comprises the steps of: dissolving Zn or Zn-compound, such as Zn, Zn(NO3)2, ZnCO3, zinc citrate, etc., into 0.1-5M HNO3; adding an organic acid such as malic acid, maleic acid, citric acid, oxalic acid, etc. to form precursor; adding NH4OH to adjust pH of the solution between 3-9; ignition reacting at 200-500deg.C to form ZnO precursor powder; and calcining at 400-900deg.C.
Patent KR-20010069807-A (KR)
Title: The composite with ultraviolet prevention and changing color, and its manufacturing method
Inventor: JO KYONG RAE
IPC: A61Q17/04
Filed: 2001-05-12
Abstract: PURPOSE: A color-changing and sun-blocking composition is provided, which shows improved sun-blocking index, and changes color expression when exposed to sunlight, so that it can change skin color by sunlight intensity, and block UV rays completely without skin irritation. CONSTITUTION: A process for the preparation of color-changing and sun-blocking composition comprises the steps of: adding spiro oxazine Blue 1%(or spiro pyran yellow 1%, or spiro pyran red 1%, or spiro oxazine violet 1%) 1g, anti-oxidant(e.g., hydroxytoluene, hydroxyanizol, amines, phenols, aminophenols, tocopherol) 1g, stabilizer(e.g., lecithin, Hisorb-770, argine, carrageenan, agar for maintaining emulsification state) 2g to glycerine, soybean oil, Tung oil, vaseline(or lanoline, palmitic acid, iso-stearic acid) each 100g, and mixing at about 95deg.C; mixing to get solution, and processing precipitation reaction and freezing process to get the color-changing and sun-blocking composition.