baber/WOPTO huggingface dataset:
Patent KR-19990036004-A (KR)
Title: 냉장고
IPC: F25D25/02
Filed: 1997-05-15
Abstract: 이 냉장고는 우수한 축냉능력과, 랙의 낙하 등의 위험의 방지와, 랙의 우수한 조작성과, 정전시 냉동실의 급격한 온도의 상승의 방지와 같은 효과를 가진다. 
     이 냉장고는 냉동실과 냉장실을 구비하고, 냉동실의 측면에 설치된 레일부를 따라서 슬라이드 가능하게 축냉제로 충전된 중공랙이 설치되어 있다. 이 레일은 레일의 중앙부에 오목한 부분을 가지며, 랙은 이 오목한 부분에 대응하는 위치에 돌출부를 가지며, 이 오목한 부분과 돌출부가 서로 끼워맞춤하여 랙이 레일부에 고정된다. 또한, 야채실은 냉장실 내에 설치되고, 이 레일부와 동일한 형상의 제 2 레일부는 이 야채실의 측벽에 형성되어 있다. 정전시 축냉제로 충전되고 냉동실에 설치된 랙은 이동되어서 야채실에 형성된 레일부에 설치될 수 있다.
Patent KR-19990036040-A (KR)
Title: 액정 매질
IPC: C09K19/42
Filed: 1996-07-22
Abstract: 본 발명은 하기 화학식 I의 화합물 하나 이상을 포함함을 특징으로 하는, 양의 유전체 이방성을 갖는 극성 화합물의 혼합물을 기본으로 하는 액정 매질에 관한 것이다: 
     화학식 I 
     
       
     
     상기식에서, 
     R, Y 및 L 1 은 청구항 1에 정의된 바와 같다.
Patent KR-19990064292-A (KR)
IPC: H04N7/087
Filed: 1996-10-17
Abstract: The circuit, to counter copy protection signals in a video signal, includes a protection detection circuit and a generic modification circuit. The copy protected video signal (12) is input to a correction circuit (14) and to a detector. This has a chroma band pass amplifier (16) to separate the chrominance and the luminance signals. An envelope detector (20) senses the lines containing the colour bursts, and triggers a one-shot circuit (22) having a period of about 52 microseconds, which is less than one TV line period. A second trigger circuit generates a 70 microsecond pulse. These triggers are applied to an AND circuit whose output causes the correction circuit to counter the copy protect signals.
Patent KR-19990071686-A (KR)
Title: 회전 저항 용해로
IPC: C03B3/02
Filed: 1996-12-11
Abstract: 본 발명은, 유리, 에나멜 또는 세라믹과 같은 유리질화 조성물용의 전기 저항 용해로로서, 간헐적 또는 연속적으로 작동될 수 있으며 빠르고 깨끗한 생성물 교환을 허용하며, 정치 상부 노 (4) 및 수직 축선을 중심으로 회전이 가능한 용해 탱크 (1) 를 갖는 전기 저항 용해로에 관한 것이다.
Patent KR-19990087519-A (KR)
Title: 양각 포토레지스트 조성물의 열 처리법
IPC: G03F7/38
Filed: 1997-02-27
Abstract: 본 발명은 디아조나프토퀴논 설포네이트 에스테르-노볼락 양각 포토레지스트를 순간 노출 후 소성(순간 PEB) 공정으로 처리하는 것에 관한 것이다. 이 방법은 종래의 노출 후 소성(PEB) 공정에 비해 보다 높은 온도(≥130℃)와 매우 짧은 소성 시간(≤30초)을 레지스트, 바람직하게는 하부 항반사성 코팅 위에 처리한다. 이러한 처리에 의해 레지스트의 해상도, 공정 허용 범위, 열적 변형 온도, 레지스트 접착력 및 플라스마 에칭 내성이 크게 향상된다.
Patent KR-19990087792-A (KR)
Title: 살충제 혼합물
IPC: A01N47/38
Filed: 1997-03-06
Abstract: 본 발명은 메틸 7-클로로-2,5-디히드로-2-[[(메톡시카르보닐)[4-(트리플루오로메톡시)페닐]아미노]카르보닐]인데노[1,2-e][1,3,4]옥사디아진-4a(3H)-카르복실레이트와 피메트로진의 조합을 포함하는 상승효과 살충제 혼합물, 그들의 농업적으로 적절한 조성물 및 일반적으로 절지동물 해충 및 특별하게는 곤충의 억제를 위한 이용 방법에 관한 것이다.
Patent KR-20000050810-A (KR)
Inventor: JEONG BYONG YONG
IPC: F02D45/00
Filed: 1999-01-15
Abstract: PURPOSE: A circuit for preventing auto igniting of engine of vehicle using liquid petroleum gas(LPG) as a fuel and a method of preventing such ignition are provided to achieve an enhanced engine performance while preventing a auto igniting of engine by a delayed operation of an idle speed actuator. CONSTITUTION: A circuit comprises an idle speed actuator(ISA) consisting of a starting key, a main relay, and ISA relay, which are separated from each other, wherein the ISA is supplied with a power voltage via the ISA relay. A method of preventing auto igniting of engine of vehicle using LPG as a fuel comprises the steps of starting operation of an engine and judging whether the starting key is turned off during the operation of the engine, and performing a normal control if the starting key is not turned off, and if the starting key is judged as turned off, setting an ISA relay operation delay time, operating the ISA relay according to the set delay time, judging whether the set delay time has lapsed, and turning off the ISA relay.
Patent KR-20000051837-A (KR)
Inventor: HAN JA YU
IPC: C04B35/00
Filed: 1999-01-27
Abstract: PURPOSE: A ceramic construction materials and a preparation method thereof are provided which are good for sauna facilities. CONSTITUTION: A ceramic construction materials is produced by the following step; mixing 40-60wt% of elvan powder, 40-20wt% of germanium powder, 12-8wt% of plaster or obsidian, 5-3wt% of feldspar powder, and 5-3wt% of pagodite powder; forming and curing by pouring the mixture into brick or panel form; heating and plastic working the forming material at 800-950°C.
Patent KR-20000055236-A (KR)
Inventor: JEONG SEOK WOO
IPC: H04N5/225
Filed: 1999-02-04
Abstract: PURPOSE: A method for random triggering in a charge coupled device camera is provided to output an input image data continuously whenever a triggering signal is generated by outer sensors. CONSTITUTION: A method for random triggering in a charge coupled device camera includes following steps. At the first step, an image data of one field is output and stored when a trigger signal is generated from external sensors(108,208). At the second step, the stored image data is output continuously until next trigger signal is generated. At the first step, the image data of one field is stored in a first-in-first-out memory(205). The first and the second steps are performed based on a control signal which is generated by combining a trigger signal from the external sensors(108,208), a mode signal from a user, an odd/even number selection signal from a digital signal processor of the camera, and a vertical driving signal.
Patent KR-19990077440-A (KR)
IPC: G06F11/00
Filed: 1999-02-19
Abstract: 본 발명은 작동하지 않는 처리 요소를 효과적으로 디스에이블링시킴으로써 다수의 데이터 프로세서와 처리 요소를 포함하는 대형 집적 회로 소자(large intergrated circuit devices)의 제조와 연관된 오버헤드 비용을 최적화하는 다중 프로세서 시스템 및 방법에 관한 것이다.  처리 요소는 집적 회로 제 1 레벨상에 분할된 전력 분배(segmented power distribution)를 통하여 혹은 다중 처리 시스템의 기능성(functionality)에 기초하여 사전선택된 논리 상태의 금지 신호를 제공함으로써 인에이블링된다.  다중 처리 시스템의 기능성은 웨이퍼 레벨 검사(wafer level testing)를 포함하는 초기 검사 절차(initial testing procedure) 동안에 결정된다.
Patent KR-20000059718-A (KR)
Inventor: JANG GYEONG GEUN
IPC: G05B19/05
Filed: 1999-03-08
Abstract: PURPOSE: A nonstop operation method and a circuit for a PLC dual system is provided to prevent errors in output by adding control blocks A and B to keep previous condition of system control before the control is normalized as system A and B monitor each other. CONSTITUTION: A nonstop operation method and a circuit for a PLC dual system includes the following steps. In the first step, when an error occurs during master operation, system reset signal is activated and master signal is deactivated. In the second step, the activated and deactivated signals are delayed to be output for a specified time. In the third step, after the signal delay, whether taking back control of the system in slave operation is monitored. In the fourth step, if the slave system does not have control for a specified time, backbone reset signal is activated to show that errors occurred in both systems.
Patent KR-19990068296-A (KR)
Title: 반고정식부침채롱식가두리양식구조
IPC: A01K61/00
Filed: 1999-03-11
Abstract: 본 발명은 조류의 흐름이 거칠은 바다에서 용이하게 패류를 양식할 수 있는 채롱식 가두리양식장에 관한 것이다. 
     가두리 양식은 비교적 파고가 높지 않고 조류의 흐름이 완만한 장소에서 일정한 형태로 어패류를 가두어놓은 형태로 양식을 하는 구조물이며 설치장소가 주변해류의 영향등에 의하여 우리나라의 경우 서남해안에 국한되고 있다. 
     본 발명은 해저면에 직접 고정할 수 있는 고정장치를 설치하고 이것에 부침(浮沈)이 가능하도록 채롱을 설치하여 거친 파도가 있다하여도 안정된 구조로 어패류를 양식할 수 있게 하였다. 따라서 일반적으로 가두리 양식이 어렵다고 판단되는 장소에서 용이하게 양식이 가능하도록 하여 어민의 소득증대와 양식처의 확대가 가능하도록 하였다.
Patent KR-19990077828-A (KR)
IPC: C23C18/26
Filed: 1999-03-12
Abstract: 본 발명은 유기금속 화학증착(Organometallic Chemical Vapour Deposition: MOCVD)법에 의한 BST(Ba x Sr 1-x TiO 3 , 이때, 0<x<1이다) 박막의 제조시 사용되는, 루이스 염기로 작용하는 아민계 또는 에스테르계 용매, 및 Ba(DPM) 2 -테트라엔, Sr(DPM) 2 -테트라엔 및 Ti(i-OPr) 2 (DPM) 2 를 1 : 1 : 2∼3의 몰비(DPM: 2,2,6,6-테트라메틸-3,5-헵타디온, 테트라엔: 테트라에틸렌펜트아민)로 포함하는 Ba, Sr 및 Ti 전구체의 단일 용액에 관한 것으로, 이를 화학증착시켜 BST 박막을 제조함으로써 BST 박막 조성의 재현을 가능하게 하고 3가지 전구체를 개별적으로 사용하는 경우에 드는 비용을 절감할 수 있다.
Patent KR-19990077852-A (KR)
Title: 반도체 집적회로장치
IPC: G11C5/14
Filed: 1999-03-13
Abstract: 외부단자로부터 공급되는 전원전압을 받고, 그것을 강압(降壓)한 전압으로 동작되는 내부회로와, 상기 내부회로에서 형성된 출력해야 할 신호를 타이밍 신호에 따라서 외부단자를 통해서 출력시키는 출력회로를 구비한 반도체 집적회로장치에 있어서, 상기 내부회로에서 형성된 출력해야 할 신호를 레벨 시프트 회로에 의해 상기 외부단자로부터 공급된 전압 레벨에 대응된 신호레벨로 변환하고, 상기 출력회로에 의해 상기 외부단자로부터 공급된 전원전압에 대응된 전압 레벨의 타이밍 신호를 사용하여 상기 레벨 변환된 신호를 출력시킨다.
Patent KR-20000061699-A (KR)
Inventor: PARK CHANG HYEOK
IPC: G01D21/02
Filed: 1999-03-30
Abstract: PURPOSE: A sensor is provided to simplify a structure by replacing several sensors needed in air bag and suspension systems to one sensor, to save costs and to decrease an installation space. CONSTITUTION: Leaning to a front part is generated by a sudden brake of a vehicle. A first weight bob(18) of a spiral member is leaned to the front part. A distance between first and second pole plates of a first condenser decreases. A voltage over a resistance of the first condenser increases. An electronic control unit decides that a vehicle body is leaned to the front part while decreasing the leaning by converting a suspension(48) to a hard mode. The voltage over the resistance of the first condenser is changed upon a collision. The electronic control unit decides the change of the voltage as a collision and sends a deployment signal to an air bag.
Patent KR-20000065538-A (KR)
Inventor: SIM JANG UK
IPC: B41J2/00
Filed: 1999-04-06
Abstract: PURPOSE: A method for adjusting the thickness of print in an inkjet printer is provided to adjust the thickness of print in case that print data received from a host computer is weak or strong. CONSTITUTION: A method for adjusting the thickness of print in an inkjet printer which converts the print data received from a host computer into bitmap image and prints the bitmap image includes the steps of confirming whether a thickness adjusting key setting the thickness of print is selected in a plurality of keys installed in an operating panel of the inkjet printer(S301), printing the bitmap image with the thickness designated by the host computer if the thickness adjusting key is not selected, displaying the range of the thickness in a display window of the operating panel if the thickness adjusting key is selected(S302), storing the selected predetermined thickness in a memory of the inkjet printer if the predetermined thickness is selected in the displayed range(S304), and printing the bitmap image with the stored predetermined thickness.
Patent KR-20000067004-A (KR)
Inventor: PARK I SOON
IPC: G03F7/027
Filed: 1999-04-22
Abstract: PURPOSE: Is provided a photosensitive paste composition for plasma display panel, which is possible firing at the remarkable low temperature. CONSTITUTION: The photosensitive paste composition is prepared by dispersing phosphor powder of 5-40 wt% to vehicle of 5-60 wt% containing reactive cellulose derivative as binder, solvent, photoinitiator and additive, which the reactive cellulose derivative is combined with functional group having double bond to the side chain of cellulose derivative by covalent bond.
Patent KR-20000067200-A (KR)
Inventor: KANG PYO HYEON
IPC: B01D53/64
Filed: 1999-04-26
Abstract: PURPOSE: An apparatus for removing metal powder in exhaust gas which can separate and remove the metal powder before introducing into a catalytic purifier in order to prevent the damage of the purifier is provided. CONSTITUTION: An apparatus for remove metal powder in exhaust gas according to the present invention constitutes an exhaust system composed of an exhaust manifold connected to a cylinder head of engine, exhaust pipe connected to the exhaust manifold and catalytic purifier connected to the middle of the exhaust pipe and muffler wherein the apparatus is characterized in that the apparatus is connected to the middle of the exhaust pipe in front of the exhaust manifold and comprises a connection main body having a flow path through which exhaust gas is passed, an electromagnet positioned on the flow path in the connection main body and turned on/off by linking to a starter of engine, and a metal powder collection box mounted at the bottom of the connection main body to receive the metal powder adsorved by the electromagnet when the powder is dropped.
Patent KR-20000073006-A (KR)
Inventor: SEO GANG SU
IPC: H04L29/10
Filed: 1999-05-04
Abstract: PURPOSE: A method of controlling a DVD player using digital communication interface is provided which is capable of easily controlling the operation of the DVD player in a digital video display. CONSTITUTION: A method of controlling a DVD player using digital communication interface includes a step of receiving an interface command from a user through a communication channel, a step of analyzing an operation control command related with playback of the DVD storing multiple programs, and a step of performing an operation previously defined according to the analyzed command, to thereby control functions and operations according to characteristics of the DVD through the communication channel such as IEEE 1394.
Patent KR-20000073566-A (KR)
Inventor: LEE GYEONG U
IPC: H01L23/52
Filed: 1999-05-12
Abstract: PURPOSE: A method for manufacturing a single wafer module of an integrated circuit chip array type is provided to decrease a semiconductor integrated circuit in size, by forming the semiconductor integrated circuit chip array of a large capacity and a high operation speed on a semiconductor wafer. CONSTITUTION: A module circuit composed of a plurality of semiconductor integrated circuit chips is designed. A pattern of the module circuit is formed on a wafer. A module connector is formed on the wafer. The semiconductor integrated circuit chips perform the same function, or perform different functions.
Patent KR-19990068551-A (KR)
Title: 자동차타이어제조용압착로울러
IPC: B29D30/08
Filed: 1999-06-01
Abstract: 본 발명은 자동차타이어 제조시에 사용되는 고무시트에 남아 있는 공기를 제거시키는 다수 개로 구성된 압축 로울러에 관한 것이다. 
     외부에 공기실린더(3) 의 피스톤(4)에 의해 고무시트층(12)의 표면에 상기 여러개로 구성된 로울러가 요철을 통과하면서 요철 부분 전체에 일정한 압력을 가하는 로울러는 일정압력을 가하는 여러 개로 구성된 로울러에 있어서, 
     내측에 통공(14)을 형성시켜 에어튜브가 내장되어있으며, 
     외륜(1)자동차 타이어제조용 압착로울러에 있어서, 
     외륜(10)과 내륜(13)은 합성수지로 구성되어 있으며, 상기 외륜과 내륜 사이에 금속 베아링케이스(11)를 형성시킨, 
     볼(강구)(12)은 무급유베아링을 사용하며, 금속 또는 합성수지 볼(강구)로 구성됨을 특징으로 하는 자동차 타이어 제조용 로울러.
Patent KR-20010001213-A (KR)
Inventor: AHN HYEOK SEONG
IPC: B04C5/187
Filed: 1999-06-02
Abstract: PURPOSE: A cyclone dust collector is provided to reduce prominently the flow of air and dust flowed into the dust collecting can while a pollutant guide device is installed in between a cyclone body and the dust collecting can, so that a dust flow and a re-scattering of dust are prevented. CONSTITUTION: A cyclone dust collector comprises; a cyclone body(10); a suction passage-pipe(20) which is united with the cyclone body as one body, and in which the air and the pollutant are sucked; an air discharging pipe(30) which discharges the air sucked into the cyclone body; and a dust collecting can(50) which collects the dust flowed into the cyclone body; and a pollutant guide device which is installed in between cyclone body and dust collecting can so that the pollutants flowed into the cyclone body are guided to the inside of dust collecting can. The pollutant guide device consists of a spiral blade(60) in which a spiral wing(62) is integrated around the shaft(61).
Patent KR-20010002810-A (KR)
Inventor: CHOI JONNY Q
IPC: H04B5/04
Filed: 1999-06-14
Abstract: PURPOSE: A vending machine providing goods for free when a user sees an advertisement and a method therein are provided to give proper compensation to the user by confirming the data of the user who reads received information and makes an appropriate response. CONSTITUTION: A vending machine providing goods for free when a user sees an advertisement is comprised of an information output unit(100), an information input unit(200), a memory(300) and a memorized information output unit(400). If a pager user reads information through the information output unit(100) and inputs a response through the information input unit(200), the memory(300) stores the data. The stored data is handed over to other information processing media through the memorized information output unit(400).
Patent KR-20010004349-A (KR)
Inventor: KANG YEONG MIN
IPC: G11C11/22
Filed: 1999-06-28
Abstract: PURPOSE: An apparatus is provided to eliminate an imprint phenomenon so that a stable reference voltage is generated for a ferro-electric memory device. CONSTITUTION: The first switching transistor(N1) is connected between a negative bit line(/BL0) and a reference plate line(/RCP). A reference word line(RWL) is connected to a gate of the first switching transistor(N1). The second switching transistor(N2) is connected between the negative bit line(/BL0) and a reference plate line(RCP). A reference word line(/RWL) is connected to a gate of the second switching transistor(N2). The first reference cell(200) includes a ferro-electric capacitor(FC1) connected between the reference plate lines(/RCP,RCP) to store data "1" of information. A third switching transistor(N3) is connected between a negative bit line(/BL1) and the reference plate line(/RCP). The reference word line(RWL) is connected to a gate of the third switching transistor(N3). A fourth switching transistor(N4) is connected between a negative bit line(/BL1) and the reference plate line(RCP). The reference word line(/RWL) is connected to a gate of the fourth switching transistor(N4). The second reference cell(220) includes a ferro-electric capacitor(FC2) connected between the reference plate lines(/RCP,RCP) to store data "0" of the information.
Patent KR-20010004803-A (KR)
Inventor: KIM GIL HO
IPC: H01L21/28
Filed: 1999-06-29
Abstract: PURPOSE: A metal line formation method in semiconductor devices is provided to be capable of minimizing an etch rate micro-loading effect and allowing higher-integration of semiconductor devices. CONSTITUTION: An underlying oxide film(31) is formed including a via contact hole through which an underlying metal line is exposed. The first titanium/titanium nitride(35) is then formed on the surface of the via contact hole. After tungsten(37) filling the via contact hole is filled, tungsten is etched by a given thickness and is then planarized, wherein tungsten on the underlying oxide film remains by a given thickness. After a stack structure of the second titanium/titanium nitride(39), aluminum(41) and the third titanium/titanium nitride(43) is formed, the stack structure is etched by plasma in which Cl2+BCl2 are activated, plasma in which SF6 is activated and plasma in which Cl2+BCl3 is activated, by use of the difference of an etch select ratio between the stack structure and tungsten using the upper metal line mask.
Patent KR-20000022661-A (KR)
Inventor: KIM KUI SANG
IPC: H01L21/205
Filed: 1999-07-08
Abstract: PURPOSE: A plasma equipment for fabricating a semiconductor device is provided to uniformly keep process variables and total chuck capacitance between a chuck and ground terminal regardless of advance preparation operation. CONSTITUTION: A plasma equipment comprises a grounded chamber(CB). A chuck(CK) is settled in the chamber and insulated from the chamber. A gas injection ring(R) is settled at periphery of side wall of the chuck and electrically connected to the chamber. An induction plasma power source(PS) is connected to the chuck. A system controller(SC) generates a signal controlling the induction plasma power source(PS). A capacitance compensator(CC) keeps total chuck capacitance between the chuck and ground terminal, uniformly.
Patent KR-20010009268-A (KR)
Inventor: YOON JONG SU
IPC: H01L29/786
Filed: 1999-07-08
Abstract: PURPOSE: A thin film transistor substrate for a liquid crystal display device and a fabrication method thereof are provided to simplify a fabrication process thereof. CONSTITUTION: A lower layer(221,241) of transparent conductive material, a buffer layer(222,242), and an upper layer(223,243) of low-resistance conductive material are sequentially stacked an insulation substrate(10) and then patterned by using the first resist pattern having at least three different thickness as an etch mask to form a three-layered gate wiring having a gate line(22), a gate electrode(24), and a gate pad, and a pixel electrode(28) of the lower layer. Thereafter, a gate insulating pattern(32) covering the gate wiring, a semiconductor pattern(42,48), and an etch stopper(52) over the gate electrode(24) are formed by using the second resist pattern having at least three different thickness as an etch mask. Then, an ohmic contact pattern(62,67), a data wiring(72,74,76), and a protective pattern(90) are formed by using the third resist pattern having at least three different thickness as an etch mask. After that, the semiconductor pattern exposed out of the protective pattern is removed.
Patent KR-20010009376-A (KR)
Inventor: LEE YEONG CHEOL
IPC: H01L21/768
Filed: 1999-07-09
Abstract: PURPOSE: A semiconductor device manufacturing method is provided to be capable of preventing increase of the atmosphere current by lowering the breakage voltage at a low-concentration region in the sidewall of the gate. CONSTITUTION: A trench type field oxide film defining an active region in a field region is formed on a semiconductor substrate(41) of the first conductive type. A gate(53) is formed along the width of the device by intervening a gate oxide film(51) between the active region and the field oxide film on the semiconductor substrate. Impurity ions of the second conductive type are injected into both sides of the gate on the semiconductor substrate to form an impurity region. An interlayer insulating film(61) covering the gate is formed on the semiconductor substrate and is then treated by annealing process so that moisture within the interlayer insulating layer is diffused toward outside.
Patent KR-20010010230-A (KR)
Inventor: LEE JIN SEOK
IPC: G09G3/30
Filed: 1999-07-16
Abstract: PURPOSE: A drive control method of EL display is provided to apply a drive voltage with a size subtracting a row electrode voltage from a threshold voltage to column electrodes of the EL display, thereby decreasing the output current load of column axis drive ICs in structuring an EL display of a great screen, easily driving the great screen, and reducing the waveform distortion of applied voltage. CONSTITUTION: The driver of EL display comprises an input source(1), a control frame buffer(2), an EL display(20), an EL voltage driver(3), a data shift register(21), a selector shift register(22) and line drivers(23). The drive control method of the EL display comprises a step applying a drive voltage with a size subtracting a row electrode voltage from a threshold voltage to column electrodes of the EL display.
Patent KR-20010010583-A (KR)
Inventor: LEE BYEONG GYU
IPC: F02M25/07
Filed: 1999-07-21
Abstract: PURPOSE: An exhaust gas recirculating valve is provided to improve reliability and lengthen the lifespan of the valve by reducing abrasion and friction between an armature and a sleeve tube. CONSTITUTION: A valve(10) comprises a solenoid coil(20) connected to a power source and installed within a housing; a sleeve tube(40) having an armature(30) and which is disposed at the center of the valve and between solenoid coils; and a protective film(34) formed of a magnetite(Fe3O4) and which is arranged between the armature and the sleeve tube. When a power is applied to the solenoid coil, the armature moves vertically within the sleeve tube. The armature which is made up of iron and steel is shaped into a near cylinder, and inserted into the sleeve tube. The armature has at the center thereof a penetrating hole(32) for fixing an end of a shaft(50). The other end of the shaft has a valve open/shut-off head(52). The protective film is coated all over the armature.