baber/WOPTO huggingface dataset:
Patent KR-20020029808-A (KR)
Title: Manufacture method and protect device of organic electroluminescence element
Inventor: KIM GYEONG HAN
IPC: H05B33/04
Filed: 2000-10-14
Abstract: PURPOSE: An inorganic electroluminescent display device protection apparatus and method for manufacturing the same is provided to allow for a mass production of protection boards, while achieving an improved yield rate of the display device. CONSTITUTION: A protection apparatus comprises an inorganic material deposition board(110) having devices(130) divided into unit cells(115) and which display information to each unit cell; a protection board(200) attached to face the inorganic material deposition board, and which has protection caps(230) sealed to the portion corresponding to a screen display area, with the devices accommodated within the protection caps, so as to protect the devices from an external environment; a drying agent(240) attached to the bottom surface of the protection cap, and which protects pixels from moisture; and a sealing agent(300) coated along the edge of one or the unit cell or the protection cap, and which seals the gap formed between the inorganic material deposition board and the protection board so as to prevent moisture or air from being introduced into the gap.
Patent KR-20020034513-A (KR)
Title: Apparatus for moving wafer
Inventor: HAN GWANG YUN
IPC: H01L21/68
Filed: 2000-11-02
Abstract: PURPOSE: An apparatus for transferring a wafer is provided to stably transfer the wafer through a wafer transfer while preventing damage to the wafer in a transfer process, and to increase productivity while guaranteeing a stable process in a process chamber. CONSTITUTION: A settling unit of a ring type is an end portion of an upper arm(10). Guides are formed in three points so that wafers are settled in the settling unit at regular intervals. A bracket(13) is installed on the inner circumferential surface of the respective guides. A detecting unit(20) detects whether the wafer is settled, mounted on the respective guides of the settling unit. A control unit(30) checks a signal detected from the detecting unit and determines whether an interlock is performed.
Patent KR-20020034703-A (KR)
Title: Management method of cable modem
Inventor: KIM DAE WON
IPC: H04L12/28
Filed: 2000-11-03
Abstract: PURPOSE: A method for managing a cable modem is provided to manage a cable modem in which an SNMP(Simple Network Management Protocol) agent for changing a route OID(Object IDentifier) is performed and a cable modem in which an SNMP agent without changing the route OID is performed in one NMS(Network Management System). CONSTITUTION: The string of a definition portion is searched among the content of a file in which a route OID is changed among MIB(Management Information Base) files supported by an SNMP agent of a cable modem, and a name portion is changed and the MIB file is corrected. The corrected MIB file is compiled and installed in an NMS using the SNMP. The MIB file in which the name of definition is same and the route OID is changed and an MIB file in which the route OID is not changed are installed in one NMS.
Patent KR-20020043664-A (KR)
Title: Automobil comsumption exchange alarm device by a automobil power
Inventor: KIM SEUNG HO
IPC: B60Q9/00
Filed: 2000-12-02
Abstract: PURPOSE: A system for informing the supplies change time by using a power supply of a vehicle is provided to keep the optimal state of a vehicle informing the change or replacement time of such supplies as engine oil, belts and tires. CONSTITUTION: A system for informing the supplies change time of a vehicle comprises a body(1) attached on the upper portion of a dash board, a connection jack(10) to use the power of a cigar jack, a key unit(11), and a change informing control unit to control a lamp(12) consisting of an LED(Light Emitting Diode). If the supplies change time approaches, the LED is lighted on, and a corresponding message is outputted via a speaker(13).
Patent KR-20020045029-A (KR)
Title: Vacuum Control system of vacuum refrigerator
Inventor: HWANG IN YEONG
IPC: F25D23/00
Filed: 2000-12-07
Abstract: PURPOSE: A device for controlling vacuum of each division of vacuum refrigerator is provided to prevent oxidation of food by keeping a food storage compartment vacuous and to keep each of divisions of the food storage compartment vacuous in order. CONSTITUTION: A vacuum refrigerator includes a vacuum chamber(30) and a vacuum control device. The vacuum chamber is placed on a cold air passage and is divided into a plurality of spaces(30a,30b,30c,30d,30e) by partitions(31). The vacuum control device discharges air in the spaces in order to keep vacuum. The vacuum control device includes a vacuum pump(40); a pressure control part(50); and valves(60). The vacuum pump is placed to be fluidically connected with one of the spaces to discharge air. The pressure control part is placed in one of the spaced most distant from the space where the vacuum pump is placed to turn on/off the vacuum pump according to pressure. The valves are placed on the partitions to open and close in order according to differences of pressure of the spaces.
Patent KR-20020018924-A (KR)
Title: Method for manufacturing a noodle using a corn
Inventor: JANG YEON HWA
IPC: A23L7/109
Filed: 2000-12-14
Abstract: PURPOSE: Provided is a method of making corn noodle by mixing corn powder, salt and water, making dough and extruding. The corn noodle is low cost, having also characteristic smooth and chewy texture, specific color, flavor and taste. CONSTITUTION: The noodle comprises: making step of dough by mixing 70-85wt.% of corn powder from its grain without the covering layer, 5-15wt.% of the corn starch from the grain without germ, 2-10wt.% of salt and 2-10wt.% of water; making step of noodle strings by extruding the above dough through noodle extruding mold with the pipes heated at 130-150deg.C and sterilizing; and drying the noodle strings at 4-10deg.C for 10-20 minutes and vacuum packing.
Patent KR-20020050353-A (KR)
Title: Jig for holding cam shaft sprocket
Inventor: HAN BYEONG HYEOK
IPC: B25B11/00
Filed: 2000-12-21
Abstract: PURPOSE: A fixing jig for a cam shaft sprocket is provided to implement maintenance works in checking or exchanging parts in a cylinder head without releasing timer belt by constituting the jig unit capable of fixing installing state of cam shaft sprocket engaged with the timing belt. CONSTITUTION: A fixing jig comprises a sprocket coupling portion(41), a sprocket axis portion(42) and a sprocket key portion(43), a jig body(44), and a mounting portion(40). The sprocket coupling portion is inserted into front inside of a cam shaft sprocket. The sprocket axis portion is coupled to an axis hole of the cam shaft sprocket and the sprocket key portion is coupled to a key hole, and all of the axis and key portions extend from the sprocket coupling portion toward front portion thereof. The jig body extends downward toward its back face while supporting the sprocket coupling portion , the sprocket axis portion and the sprocket key portion. The mounting portion is integrally formed on a lower portion of the jig body and is fixed to a side of an engine.
Patent KR-20020051417-A (KR)
Title: System which intercepts the regular power supply of the vehicle and the heavy equipment
Inventor: KWON OH MIN
IPC: B60R16/04
Filed: 2000-12-22
Abstract: PURPOSE: A constancy power supply cut-off system of vehicle and heavy equipment is provided to control power supply through a timer relay in a circuit of receiving battery constancy power supply even under the condition that a start switch is off. CONSTITUTION: A constancy power supply cut-off system of vehicle and heavy equipment includes a start switch(3), a timer relay(4), and a switching relay(5). The start switch decides power supply is performed to each constituent element of vehicle and heavy equipment, and gives the followed signal. The timer relay checks the signal generated when the start switch is not off and cuts off transmission of supply power if the signal is not given for the predetermined time. The switching relay performs or cuts off battery constancy power supply to constituent elements operated by battery constancy power source of vehicle and heavy equipment depending on the supply of power source through the timer relay.
Patent KR-20020051803-A (KR)
Title: Bacillus Amyloliquefaciens CHO104 with Antagonic Property and Antimicrobial Compound Produced by This Strain
Inventor: CHO JEONG YONG
IPC: C12N1/20
Filed: 2000-12-23
Abstract: PURPOSE: Bacillus amyloliquefaciens CHO104 with antagonistic property and an antimicrobial compound produced thereby are provided. The novel antimicrobial compound can be useful in medicines, agricultural chemicals, foods, etc. CONSTITUTION: The microorganism Bacillus amyloliquefaciens CHO104(KCTC 18060P) isolated from the soil produces an antimicrobial compound. A microbial preparation containing Bacillus amyloliquefaciens CHO104 is prepared by culturing Bacillus amyloliquefaciens CHO104 in SDBP(soy dextrose beef ex. proteose peptone) medium at 30 to 35 deg. C. The novel antimicrobial compound, Amyloliquetone, is produced by the steps of: separating the supernatant of the cultured medium of Bacillus amyloliquefaciens CHO104; collecting an ethylacetate-soluble acidic·neutral fraction from the supernatant by adding 1N HCl; collecting an ethylacetate-soluble neutral fraction by adding 2 to 5% NaHCO3; subjecting the ethylacetate-soluble neutral fraction to an adsorption chromatography on silica gel to obtain an active fraction; and subjecting the active fraction to octadecylsilane column chromatography and HPLC, sequentially.
Patent KR-20020053441-A (KR)
Inventor: CHOI DEOK HYEON
IPC: H01J29/07
Filed: 2000-12-27
Abstract: PURPOSE: A color selecting apparatus of a cathode ray tube is provided to optimize satisfaction in use for design, performance and price. CONSTITUTION: A color selecting apparatus of a cathode ray tube comprises a mask having a long axis direction and the short axis direction. The mask is extended in the long axis direction and the short axis direction to be combined to a frame. The mask includes many strips and many electron beam transmission hole between the strips. Tension applied on the strip of the mask is formed to make an absolute value of a slope from A to C smaller than an absolute value of a slope from C to B, where A represents tension at the center of the mask, B represents tension at the end of the mask and C represent tension at a point between A and B in a tension distribution curve with a horizontal axis for position on the long axis of the mask and a vertical axis for applied tension.
Patent KR-20020056259-A (KR)
Title: Method for forming transistor in semiconductor device
Inventor: JANG HYEON SU
IPC: H01L21/336
Filed: 2000-12-29
Abstract: PURPOSE: A method of forming a transistor of a semiconductor device is provided to improve hot carrier effect and shot channel effect so that the reliability of device improves and the operating speed increases. CONSTITUTION: A trench is formed by etching a gate electrode region of a semiconductor substrate(31) of a first conductivity. A first gate oxide layer is formed on the entire surface including the trench. A conductive layer for gate electrode(37) is formed to bury the trench. A second gate oxide layer(39) is formed by oxidizing a surface of the conductive layer for gate electrode. A first high-doped impurity is implanted in a lower part of the gate electrode and then a deep threshold voltage controlling implant region(41) is formed. A low-doped drain junction region of a second conductivity is formed by a sloped low-doped impurity of a second conductivity implant process which is performed in the drain junction region of the gate electrode. A high-doped source/drain junction region(45a,45b) of a second conductivity is formed by implanting a high-doped impurity of second conductivity in both side of the gate electrode.
Patent KR-20020056376-A (KR)
Title: Information supply method for dedicated short range communication
Inventor: JI JEONG JAE
IPC: G08G1/123
Filed: 2000-12-29
Abstract: PURPOSE: A method for providing information in a DSRC(Dedicated Short Range Communication) network is provided to reduce communication troubles or communication errors by connecting a base station having functions of a server with a terminal of a vehicle. CONSTITUTION: Information data are stored previously to a recording medium including an internal memory installed in a base station. The base station is connected with a vehicle terminal in order to determine a request state of information data from the vehicle terminal. The base station searches the information data stored in the recording medium if the vehicle requests the information data to the base station. The base station transmits the requested information data to the vehicle terminal if the request information data is the data stored in the internal memory.
Patent KR-20020056639-A (KR)
Title: method for manufacturing of semiconductor device
Inventor: PARK GYEONG UK
IPC: H01L21/3205
Filed: 2000-12-29
Abstract: PURPOSE: A method for fabricating a semiconductor device is provided to prevent a bridge between adjacent plugs by eliminating a residual polysilicon layer, and to prevent a short-circuit between a word line and a bit line by forming a sidewall nitride layer and a cap nitride layer. CONSTITUTION: A plurality of word lines(23a) having predetermined intervals are formed on a semiconductor substrate(21) by interposing a gate insulation layer(22). The cap nitride layer(24a) is formed on the word line. The sidewall nitride layer(25) is formed on both side surfaces of the cap nitride layer and the word line. A sidewall oxide layer(26) is formed on both side surfaces of the sidewall nitride layer. A polysilicon layer is deposited on the entire surface of the semiconductor substrate including the sidewall oxide layer. A photoresist layer is applied on the polysilicon layer and is patterned to define a bit line contact region. The polysilicon layer is selectively eliminated to form a bit line contact plug(27a) by using the patterned photoresist layer as a mask. The photoresist layer is eliminated. The bit line contact plug is masked and the polysilicon layer is removed. The sidewall oxide layer is selectively eliminated.
Patent KR-20020059096-A (KR)
Title: combination prosecutor system for gas pipe
Inventor: PARK YANG SOO
IPC: G01M3/04
Filed: 2000-12-29
Abstract: PURPOSE: A device for testing absorption part of gas pipe is provided to objectively and reliably test by recording condition of tested fused part. CONSTITUTION: A device comprises a sensor fixed on a pipe guide line to detect a discontinuous part on a surface of material or in the material; an ultrasonic flaw detecting unit using C-SCAN and transmitting ultrasonic waves to the material for non-destructive inspection of the material; an IBM compatible computer having an analog-digital converting board(10-500MHz) and a software package built in; a visual graphic program comprising 3D simulation and image processing to visually display test result; and a report outputting test result.
Patent KR-20010021634-A (KR)
Title: 통신망의 장비에 관한 방법 및 장치
IPC: H04M1/00
Filed: 1998-06-30
Abstract: 본 발명은 개인용 통신국을 선택된 동작 모드로 설정하는 방법 및 수단을 포함하는데, 이것은 동작 설정의 슈퍼세트내에 동작설정의 선택된 서브세트를 포함한다. 상기 통신국은 적어도 한 개의 통신망으로 통신할 수 있다. 이러한 방법은 상기 통신국(301)을 초기화하기 시작하는 단계의 순서를 포함한다. 제1 프롬프팅 메세지는 상기 프롬프팅 메세지의 응답에 요청되는 사용자에게 나타난다(302). 상기 응답(303)은 부정 응답이 대기모드 상태(305)로 상기 통신국을 설정하고, 긍정 응답이 복수의 프롬프트 메세지(306)를 나타내는 것으로 해석된다(304). 이것은 동작 설정의 사전 선택된 서브 세트로 동작 설정을 하는 복수의 응답을 제공하기 위하여 사용자에게 요청한다.
Patent KR-20010023515-A (KR)
Title: 집적 회로 테스터용 부하 회로
IPC: G01R31/30
Filed: 1998-08-20
Abstract: 집적 회로 테스터에 대한 부하 회로(54)는 테스트 하에서 DUT가 터미널에서 출력 신호를 발생할 때, 집적 회로 장치의 터미널에 조정 가능한 부하를 제공한다.  부하 회로는 소정 크기의 포지티브 및 네가티브 전류를 생성하기 위한 기준 입력 전압의 비선형 함수인 포지티브 및 네가티브 전류원(64, 66)을 포함한다.  다이오드 쿼드(62A-62D)는 DUT 출력 신호가 임계 전압(V th ) 이하일 때 네가티브 전류원(66)을 DUT 터미널에 연결하고, DUT 출력 신호가 임계 전압(V th ) 이상일 때 포지티브 전류원(64)을 DUT 터미널에 연결한다.  전류원(64, 66)은 소정 크기의 기준 입력 전압과 출력 전류 사이에 비선형 지수 전달 함수를 제공하여, 상대적으류 좁은 기준 입력 전압 범위에 따라 상대적으로 넓은 출력 전류 범위를 제공한다.
Patent KR-20010030780-A (KR)
Title: 크림프된 다성분 필라멘트 및 그로부터 제조된 스펀본드 웹
IPC: D04H5/00
Filed: 1998-09-30
Abstract: 스펀본드 다성분 필라멘트 및 상기 필라멘트로부터 제조되는 부직 웹이 개시되었다.  본 발명에 따라, 다성분 필라멘트는 크림프 증대 첨가제를 포함한다.  구체적으로, 크림프 증대 첨가제는 저속 응고 속도를 갖는 중합체 성분에 가해진다.  상기 첨가제는 크림프를 증대시켜, 고도로 크림프된 필라멘트가 낮은 섬유 선형 밀도에서 제조되는 것을 허용하고, 필라멘트로부터 제조된 비결합 웹의 통합성을 개선시키고, 개선된 신축성 및 직물상 특성을 갖는 웹을 제조한다.  필라멘트에 혼입된 첨가제는 부틸렌 및 프로필렌의 랜덤 공중합체이다.
Patent KR-20010033247-A (KR)
Title: Method and device for bending glass sheets
IPC: C03B23/035
Filed: 1999-10-20
Abstract: A process for shaping glass sheets with a surface-shaping mould, against which the glass sheets are pressed using a pressure drop produced by sucking out the air from the space lying between the moulding face and that face of the glass sheet on the opposite side from the glass sheet, in which the pressure drop is a maximum at the edge of the glass sheet and decreases towards the center of the glass sheet, because of fact that air is introduced via air-inlet apertures opening into the moulding face, the air is again extracted by subjecting suction apertures made in the moulding face inside the region covered by the respective glass sheet to a vacuum. Furthermore, pressure between the glass sheet and the moulding face also in the region where the air is introduced is set to a value at most equal to the pressure beyond the glass sheet, in order to avoid any formation of bulging. A shaping mould suitable in particular for implementing this process is also described.
Patent KR-20010033398-A (KR)
Title: 오스트리니아 누빌라리스에 활성인 독소
IPC: C12N1/15
Filed: 1998-12-15
Abstract: 본 발명은 비포유 동물 해충(non-mamalian pests), 구체적으로 식물 해충 박멸에 유용한 물질 및 방법에 관한 것이다.    특정 구체예에서, 본 발명은 인시류(Lepidopterans) 박멸에 유용한 신규의 바실러스 츄린겐시스(Bacillus thuringensis) 독소를 제공한다.    바람직한 구체예에서, 본 발명의 독소는 유럽 옥수수 좀벌레인 오스트리니아 누빌라리스(Ostrinia nubilalis) 박멸에 사용된다.    본 발명은 또한 본 발명의 독소를 코드화하는 뉴클레오티드 서열을 추가로 제공한다.    본 발명의 뉴클레오티드 서열은 식물과 같은 숙주를 형질 전환시켜 본 발명의 살충 독소를 발현시킬 수 있다.    뿐만 아니라, 본 발명은 해충에 활성인 독소를 코드화하는 유전자 동정용 신규의 뉴클레오티드 프라이머에 관한 것이다.    상기 프라이머들은 PCR 기술에 사용되어 상기 독소들을 코드화하는 유전자의 특징을 이루는 유전자 절편을 생성하는데에 유용하다.    상기 프라이머들은 또한 상기 독소-코드화 유전자를 검출하는 프로브로서도 유용하다.
Patent KR-20010033725-A (KR)
Title: 약제학적 제형의 제조방법
IPC: A61K9/12
Filed: 1998-12-21
Abstract: 본 발명은 입자화된 형태의 활성 성분과 경우에 따라 선택적으로 담체와 같이 전통적으로 생리학적으로 허용가능한 첨가물을 포함하는 물리적으로 안정하고 균질한 분말 제형을 제조하는 방법에 관한 것이다. 입자를 현탁제에 현탁하고, 그 결과 수득된 현탁액으로부터 현탁제를 증발시킨다.
Patent KR-20010086259-A (KR)
Title: 인터넷 검색 엔진
IPC: G06F17/30
Filed: 1999-03-16
Abstract: 본 발명은 사용자의 초기 키워드 검색 기입의 결과로서 사용자에게 제공된 일반적인 웹 페이지 검색 목록으로부터 사용자가 선택한 특정 웹 페이지 목록의 결과물을 가지고 인터넷 검색 엔진 데이터베이스를 업데이트하는 방법을 제공한다. 다른 많은 사용자의 선택을 가지고 데이터베이스를 업데이트함에 따라, 데이터베이스가 소정 키워드에 관하여 가장 많이 선택되었던 웹 목록에 우선 순위를 매기도록 업데이트 할 수 있으며, 그에 따라 동일한 키워드 검색 기입을 사용한 최종 검색에서 가장 인기있는 웹 페이지 목록을 우선으로 제시한다.
Patent KR-20010042312-A (KR)
Title: 탄화수소 트랩에 적합한 흡착재를 갖는 벌집체
IPC: F01N3/28
Filed: 1999-03-22
Abstract: 본 발명은 가스통과가 가능한 채널(2)로 구성된 벌집체(1)에 관한 것이다.  상기 채널의 내부 단면적 및 갯수는 벌집체의 특정 기하학적 표면적(GSA)을 정의하고, 이들은 적어도 부분적으로는 격벽(3)에 의해 서로로부터 분리된다.  상기 벽의 재료 및 두께는 기하학적 단위 면적에 대한 특정 열용량을 정의한다.  벌집체는 특히 탄화수소의 흡착용으로 제공된 흡착재로 구성된다.  벌집체(1)의 특정 기하학적 표면적(GSA)은 37.5m·K/J[meter Kelvin/joule] 이상이고, 바람직하게는 40 이상, 특히 바람직하게는 60이고, 상기 기하학적 표면적은 면적에 대한 특정 열용량(cp)에 의해 나누어지고, 흡착재 및 가능성있는 다른 흡착재없이 상온에서 측량된다.  벌집체(1)는 적어도 산화 방식으로 작용하는 촉매적으로 활성인 피복물을 부가적으로 포함할 수 있다.  벌집체는 450 cpsi, 바람직하게는 540 cpsi 이상을 갖는 40㎛ 이하의 두께를 갖는 시트 금속층으로 바람직하게 제작된다.  탄화수소 트랩의 이러한 치수화는 냉간시동 위상 동안 공해의 방출을 감소시키기 위하여 자동차 배출가스의 정화용으로 사용될 수 있다.
Patent KR-20010042448-A (KR)
Title: 4급 암모늄 염의 제거방법
IPC: C07C211/63
Filed: 1999-03-09
Abstract: 본 발명은 염수 용액으로부터 4급 암모늄 염(QS)을 제거하는 방법에 관한 것이다.  상기 방법은 4급 암모늄 염(QS)의 제거를 보조하는 활성탄 및 열분해된 설폰화 폴리스티렌 디비닐벤젠 수지 또는 이들의 혼합물로 이루어지는 군으로부터 선택되는 흡착제를 사용한다.  상기 방법은 일반적으로 약 -10 내지 90℃의 온도 범위, 약 1 내지 약 13의 pH 범위에서 수행될 수 있다.
Patent KR-20010042919-A (KR)
IPC: B65B43/12
Filed: 1999-04-21
Abstract: In connection with the packaging of items or loose material in sheet packings it is known to use a web of cohering flat bag members, which is successively conveyed to a filling station, in which the bag members are opened, one by one, for filling and subsequent closing and separation from the web. The free mouth edges of the bag members or the web are profiled for supported conveyance on opposed carrier rods, tubes or gripping chains which, just before the filling station, diverge from each other for effecting opening of the bag members. The invention provides for a flat bag web, the upright edge strip portions of which are caused to be folded down over respective opposed carrier chains. These strip portions are prepared with a row of perforations which, by the said down-folding, are moved down into holding contact with holding pins upwardly projecting from the carrier chains, whereby a very safe carrying and conveying engagement is obtained without any special profilation of the mouth edges and with a simple design of the carrier chains.
Patent KR-20010043859-A (KR)
Title: 생고체를 포함하는 수성 스트림의 처리 방법
IPC: C02F1/52
Filed: 1999-05-26
Abstract: 실질적으로 수성인 스트림을 정화하고 선택적으로 식품 가공 공정으로부터 생고체, 특히 단백질을 분리하는데 사용할 수 있는 방법을 제공한다.  이 방법은 생고체를 포함하는 수성 스트림을 음이온 무기 콜로이드 및 유기 중합체와 접촉시켜 생고체를 응집시키는 단계를 포함한다.
Patent KR-20010076373-A (KR)
Inventor: MATSUYAMA YUJI
IPC: G03F7/30
Filed: 2001-01-19
Abstract: PURPOSE: A developing treatment equipment is provided to prevent dropping of developer from a coating liquid supply nozzle on a substrate on which the developer has been already supplied. CONSTITUTION: A developer supply nozzle(70) which is installed so as to move freely in the X direction in a chamber(60) begins to move from a cleaning tank(85) as a waiting position(T) to the positive X direction. The nozzle(70) crosses a part above a wafer(W) without supplying developer and stops at a position(P') which proceeds a little from an end portion(P) of the wafer(W). The nozzle(70) then moves in the reverse direction, i.e., the negative X direction while supplying developer to the wafer(W). After that, the nozzle(70) stops supply of developer at a position(Q') which proceeds a little from an end portion(Q) of a cleaning tank(85) side of the wafer(W), and is returned to the cleaning tank(85).
Patent KR-20020040524-A (KR)
Title: Gas analyzing apparatus
Inventor: KIKUCHI TSUTOMU
IPC: G01N30/90
Filed: 2001-01-30
Abstract: PURPOSE: To provide a gas analyzer which efficiently and precisely analyzes impurities at ppb to sub-ppb level in a high-purity gas by integrating gas switching devices into one for minimum gas retention. CONSTITUTION: A gas switching device 21 comprises an analyzer lead-in path 22 which guides the sample gas from a sample gas source 11 to an analyzer 12 through an analyzer lead-in valve 22V, a separator lead-in path 23 which, branching from a primary path of the analyzer lead-in valve 22V, guides the sample gas to a separator 13 through a separator lead-in valve 23V, and a separator lead-out path 24 which guides the gas drawn from the separator 13 to a secondary path of the analyzer lead-in valve 22V through a separator lead-out valve 24V. Here, when the analyzer lead-in valve 22V is opened or closed, the separator lead-in valve 23V and the separator lead-out valve 24V are interlocked to be closed or opened.