baber/WOPTO huggingface dataset:
Patent KR-20020028250-A (KR)
Title: Tapping oil supply device using motor-pump for tapping machine
Inventor: KIM IN
IPC: B23B39/00
Filed: 2000-10-09
Abstract: PURPOSE: An apparatus for supplying tapping oil for a tapping machine is provided to supply exactly an adequate amount of the tapping oil to a tapping surface or a tap drill automatically or manually by operating simply a switch during machining. CONSTITUTION: An apparatus for supplying tapping oil comprises a storage vessel for storing the tapping oil(10) and an element for supplying the tapping oil to a tapping surface of a working material. The tapping oil(10) stored at the storage vessel is discharged to a nozzle(50) through the tapping oil supplying element and is supplied to the tapping surface or a tap drill. A motor pump(20) is used as the tapping oil supplying element. The motor pump(20) is driven and discharged the tapping oil to the nozzle(50) through the tapping oil supplying element if a foot switch(60) is operated. A control valve(40) is provided between the motor pump(20) and the nozzle(50) in order to control a discharging amount of the tapping oil.
Patent KR-20010000765-A (KR)
Inventor: BAE CHEOL BYUNG
Filed: 2000-10-18
Abstract: PURPOSE: A portal advertisement operation system is provided to enable a user to directly use accumulated money, offered via an online instant lottery or an advertisement search and an ARS lottery, in purchasing products at a shopping mall so that it can increase advertisement effect and increase product sales quantity over the internet. CONSTITUTION: A portal advertisement operation system comprises an off-line advertisement operation system(10) and an on-line advertisement operation system(20). The off-line advertisement operation system(10) offers the user an advertisement message via the ARS, informs the user of then lottery results after finishing the advertisement message, lets the user input a social security number, and then offers the next advertisement message. The on-line advertisement operation system(20) includes a TV-CF advertisement, a small and medium company advertisement, a nationwide advertisement, an accumulated money exchange site, and a shopping mall. If the user clicks an advertisement button, bonus money is accumulated. If the user clicks an instant lottery button, the user can receive a message of the lottery result, or a message of inputting a social security number in the case of winning the lottery.
Patent KR-20010051202-A (KR)
Inventor: TATSUMI TORU
IPC: H01L27/108
Filed: 2000-10-24
Abstract: PURPOSE: To provide a semiconductor device together with its manufacturing method, which has a capacity element excellent in characteristics and reliability even when an element structure is micronized. CONSTITUTION: On forming of a perovskite type metal oxide dielectrics film represented as ABO3, an lower part electrode material film is formed on an insulating film, and then while a lower part electrode is formed, a conductive film 305 for assisting crystallization, being 20 μm or more in width, is formed apart from the outermost perimeter of an lower part electrode array by a distance about 10 μm or less, over which a metal oxide dielectrics film is formed.
Patent KR-20020032132-A (KR)
Title: ring for araising manhole cover
Inventor: LEE IN SEONG
IPC: E02D29/14
Filed: 2000-10-25
Abstract: PURPOSE: A ring for lifting cover of a manhole is provided to reduce working period, to allow a smooth traffic and to protect traffic accidents by directly installing the ring on an existing manhole cover without boring surface of a paved road. CONSTITUTION: The ring comprises a joint(110) for an iron opening of a cover for a manhole by coupling inner circumferential side of the opening to outer side of the opening; a support for ground to be mounted onto the ground before vertically seating the support(120) into the joint(110); and a manhole cover securing portion(130) to place the cover on upper portion of the support(120). The joint(110) has the same size of its outer side to the inner circumferential side of the iron opening. The support(120) is supported over the road side and coated with concrete and/or asphalt concrete materials.
Patent KR-20020036164-A (KR)
Title: Process of preparing concentrate for herb drink from herbal materials
Inventor: YANG YEONG IN
IPC: A23L2/38
Filed: 2000-11-08
Abstract: PURPOSE: A method of a herbal drink concentrate by extracting a medicinal herb material and then effectively removing starch and microorganism from extracts is provided. The product has an excellent color and flavor and is transparent, thereby effectively being used as a herbal drink. CONSTITUTION: A medicinal herb material such as 10 to 30 parts by weight of Astragalus membranaceus Bge., 10 to 30 parts by weight of Schizandra chinesis Baill, 10 to 50 parts by weight of Liriope platyphylla Wang et Tang, 5 to 30 parts by weight of Panax ginseng C.A. meyer, 5 to 15 parts by weight of Glycyrrhiza uralensis Fish, 5 to 15 parts by weight of Zizyphus jujube var. inermis Rehd and 5 to 30 parts by weight of Euphoria longana Steud. is extracted 5 to 10 times with purified water at 80 to 150deg.C for 1 to 3 hr and filtered. The filtrate is ultrafiltrated with an ultrafiltration membrane of GR type at 60deg.C and then concentrated. The ultrafiltration retains a fraction having a molecular weight of 20,000 to 50,000 Da.
Patent KR-20020038251-A (KR)
Title: Disposal device of polluted water by using activated carbon
Inventor: LEE GWANG SU
IPC: C02F3/06
Filed: 2000-11-17
Abstract: PURPOSE: A wastewater treatment system using activated carbon is provided, which can maximize organic degradation efficiency by installing a contact media made of activated carbon inside each aeration chamber. CONSTITUTION: Contact media(24) that is constituted by packing activated carbon in a net bag is suspended vertically in each aeration chamber(10)(12)(14) and fine air bubble that is supplied via diffuser(26) come into contact with the contact media as rising upward. In the contact media aerobic microorganism is fixed on the outer surface thereof, whereas anaerobic microorganism is immobilized inside the contact media.
Patent KR-20010016187-A (KR)
Title: Apparatus and Method for serving a real-time information of web-browser based
Inventor: SONG SUNG UN
IPC: G06F17/00
Filed: 2000-11-21
Abstract: PURPOSE: An apparatus and method for offering real-time information based on web browser are provided to obtain information through visiting to the internet site by monitoring information outputting to the corresponding site in real time regardless of visiting a plurality of bookmark site, to use at any where and enable the site manager not to transmit a mail to every members by inputting an ID and secret information to a real bookmark managing site. CONSTITUTION: A businessman receives a real time connection from an internet user computer(300) and a site manager computer(400) and up loads a *.rbm file from the site manager computer(400) and transmits the internet user computer(300). A site manager server(200) stores a link page transmitted from the site manager computer(400) and clicks a title in order that the internet user computer(300) may show the link page.
Patent KR-20020040495-A (KR)
Inventor: JUNG HYEON JUN
IPC: H01J29/06
Filed: 2000-11-24
Abstract: PURPOSE: A tension mask of a flat CRT is provided to prevent a crack of CRT parts due to the excess thermal expansion of the mask by venting space of a panel and a mask on the outside. CONSTITUTION: A tension mask of a flat CRT comprises a funnel, a panel(20), an electron gun, a deflection yoke, a shadow mask(24), and a rail assembly. The panel(20) is fused to the funnel and includes a phosphor film at inward surface. The electron gun emits the electron beams toward the phosphor film. The deflection yoke deflects the electron beams emitted from the electron gun. The shadow mask(24) is mounted on inward surface of the panel(20) and allows the selected electron beams to reach the phosphor film. The rail assembly(32,34) is attached to the panel and stretched to support the shadow mask(24). Many vent holes(24a) are formed at the corner parts of the shadow mask(24).
Patent KR-20010087752-A (KR)
Title: Method for something intermediation by using internet
Inventor: KIM DONG HWON
Filed: 2000-12-06
Abstract: PURPOSE: A method for intermediating a commodity using the Internet is provided to search a person adapted to an intention of a commodity provider and to detect whether the person is adapted to the intention of the commodity provider. CONSTITUTION: A user connects to a homepage of an Internet commodity mediator through a public switching telephone network or a private line and performs a member joining process(115-117,122-123). If the user wishes to provide a commodity, the user certified through a member joining process decides whether a commodity is provided from a commodity providing display(118). The user provides user information to the Internet commodity mediator through a process for inputting data(120) for a commodity offer. The data(120) for offering the commodity includes a provided commodity name input, provided commodity contents, a provided commodity keyword preparation, a provided commodity obtain problem preparation, and a provided commodity delivering condition preparation.
Patent KR-20020051609-A (KR)
Title: A METHOD FOR MANUFACTURING PLATED Al STEEL SHEETS HAVING SUPERIOR CORROSION RESISTANCE BY Si DEPOSITION
Inventor: JUN JUNG HWAN
IPC: C23C14/24
Filed: 2000-12-23
Abstract: PURPOSE: A method for manufacturing plated Al steel sheets with superior corrosion resistance by Si deposition is provided to prevent environmental pollution caused by chromate treatment using toxic hexavalent chrome. CONSTITUTION: After heating plated Al steel sheets to the temperature range of 100 to 450°C, Si is vacuum deposited on the surface of plated Al steel sheets under vacuum condition of 1x10¬-3 to 1x10¬-5 torr in a thickness of 50Å to 3,000Å.
Patent KR-20020051621-A (KR)
Title: Cylinder block frame
Inventor: JANG BYEONG HAK
IPC: F02F1/00
Filed: 2000-12-23
Abstract: PURPOSE: An aluminum cylinder block having strength reinforcing structure is provided which is light and has high strength. CONSTITUTION: In a cylinder made of an aluminum, a frame(2), formed with a cast iron or steel which has higher strength than the aluminum, is inserted in the part the thermal stress and force is concentrated at molding. The frame is composed of an upper frame(2a) for reinforcing a crank case and a lower frame(2b) for reinforcing a bed plate. The crank case is coupled to the bed plate with bolts. A crank shaft is inserted in a shaft hole formed between the crank case and the bed plate.
Patent KR-20020054226-A (KR)
Title: Device for Compensation of Loss Variation in Optical Transmission Line
Inventor: JANG SUN HYEOK
IPC: G02B6/00
Filed: 2000-12-27
Abstract: PURPOSE: A device for compensating optical line for loss variation is provided to maximize a transport efficiency of total optical link by compensating for an optical line for a loss variation directly. CONSTITUTION: A pumping unit(408) generates a light of which a wavelength is shorter than a wavelength of an optical signal. An optical coupling unit(404) inputs the light generated in the pumping unit(408) into an optical line(402). An output fixing unit maintains constantly an intensity of an output optical signal of which a loss variation is compensated for by the pumping unit(408) and the optical coupling unit(404). The optical line(402) uses a Raman gain to compensate for the optical signal for the loss variation actively.
Patent KR-20020054958-A (KR)
Title: Insulating material heating device of deflection yoke
Inventor: KIM HAN JUNG
IPC: H01J29/70
Filed: 2000-12-28
Abstract: PURPOSE: An apparatus for heating an insulating material of a deflection yoke is provided to fuse a tube in a power induction terminal without a damage by using heated wind. CONSTITUTION: A neck portion(12) of a deflection yoke(10) is moved sequentially by a conveyer(20). A cylinder(111) is installed vertically on an upper portion of a neck fixing portion(110). A fixing block(112) is installed at an end portion of a cylinder rod(111a). The neck fixing portion(110) is used for inserting a neck of the deflection yoke(10) into a fixing groove(112a) of the fixing block(112) by shifting the cylinder rod(111a) to a lower direction. A heating line(122) is installed in an inside of a main body(121). An exhaust hole(121a) has a shape of bugle. An air supply hose(130) is installed at a rear side of the heating line(122). A heated wind portion(120) is used for fusing a tube(15) inserted into a power induction terminal(11) by using heated wind.
Patent KR-20010023561-A (KR)
Title: 영상처리 방법 및 장치
IPC: H04N13/00
Filed: 1998-09-02
Abstract: 평면 영상들을 수신하기에 적합한 입력수단, 제 1 영상과 평면 영상 시퀸스의 제 2 영상 사이에 연속성이 있는가를 판단하는 1차 해석수단, 연속성을 갖는 평면 영상을 수신하고 물체의 속도 및 이동방향 또는 원근, 크기 및 위치 중 최소한 하나를 판단하기 위해 영상들을 해석하는 2차 해석수단, 1차 해석 수단 및/또는 2차 해석 수단으로부터 수신된 데이타에 입각하여 평면 영상들을 처리하는 제 1 프로세싱 수단, 상기 제 1 프로세싱 수단으로부터 수신된 영상들을 더 처리하도록 제공되는 제 2 프로세싱 수단, 처리된 영상을 입체 디스플레이 시스템으로 전송할 수 있는 전송수단을 포함하는 3차원으로 시청하기 위해 평면 영상들을 변환하는 영상변환 시스템.
Patent KR-20010024045-A (KR)
Title: 온도 탐침
IPC: G01J5/08
Filed: 1998-09-15
Abstract: 온도 탐침은 온도 정보를 고온계에 광학적으로 전송하기 위한 광 도전체를 구비하고 있다.  광 도전체는 온도 정보를 포착하기 적합한 제 1 부분 및 고온계에 연결된 제 2 부분을 갖추고 있다.  상기 탐침은 광 도전체의 제 2 부분을 보호하기 위한 엔클로저를 또한 포함하고 있다.  엔클로저는 상기 광 도전체의 상기 제 2 부분을 수용하기 위한 통로, 상기 광 도전체의 제 1 부분을 통로로부터 엔클로저의 외부로 돌출시키기 위한 개구를 갖추고 있다.  부가적으로, 상기 통로 내부에 광 도전체의 제 2 부분을 포착하기 위해 상기 개구에 인접한 통로 내에 시일이 제공된다.
Patent KR-20010030882-A (KR)
Title: 복합 중공 섬유막
IPC: C02F1/20
Filed: 1998-10-02
Abstract: 막의 산소 투과 유량 대 질소 투과 유량의 비가 1.1 이상이고, 막을 JIS K 7114 에 따라 화학액에 함침한 후, 상기 비의 퍼센티지 변화가 ±10 % 인, 다공성 기질 층사이에 삽입된 균질 박막으로 이루어진 복합 구조를 갖는 복합 중공 섬유막에 대해 개시한다.     상기 복합 중공 섬유막을 어떤 액체 누출도 없이 화학액을 탈기하는 데 사용할 수 있다.
Patent KR-20010032381-A (KR)
IPC: C12N1/15
Filed: 1998-11-24
Abstract: Pectin degrading enzymes derived from or endogenous to Bacillus licheniformis or other Bacillus species which are at least 99 % homologous to Bacillus Licheniformis based on aligned 16S rDNA sequences have optimum activity at pH higher than 8. The pectin degrading enzymes belong to the enzyme classes pectate lyases (EC 4.2.2.2), pectin lyases (EC 4.2.2.10) and polygalacturonases (EC 3.2.1.15) and are useful in industrial processes under alkaline conditions such as in textile processing and as an active ingredient, e.g. in laundry detergents and hard surface cleaning products.
Patent KR-20010040605-A (KR)
Title: 시분할 다중화된 광섬유 센서 어레이에 대한 노이즈 억제장치 및 방법
IPC: G01J9/02
Filed: 1999-02-03
Abstract: 시분할 다중화된 센서 시스템으로 주입된 누설광 신호는 센서 질문 신호의 듀티 사이클 내의 오프 주기동안 변조된다.  누설광은 센서 출력 신호로의 원하지 않는 영향이 기저대역 주파수로부터의 주파수에서 대체되도록 변조된다.  이 주파수 대체는 수신된 신호내의 원하지 않는 노이즈 전력을 매우 감소시킨다.
Patent KR-20010052204-A (KR)
Title: 포스포나이트 리간드를 기재로 하는 Ⅷｂ족 금속의 착물을포함하는 촉매 및 히드로포르밀화 방법
Inventor: MAAS HEIKO
IPC: C07B61/00
Filed: 1999-03-11
Abstract: 본 발명은 Ⅷb족 금속의 착물을 1종 이상 포함하고 하기 화학식 I의 2자리 또는 여러자리의 포스포나이트 리간드 또는 그의 염 또는 혼합물을 함유하는 촉매에 관한 것이다.  또한, 본 발명은 1개 이상의 에틸렌계 불포화 이중 결합을 함유하는 화합물을 이러한 촉매의 존재하 일산화 탄소 및 수소와 반응시킴으로써 히드로포르밀화하는 방법에 관한 것이다. 
     〈화학식 I〉
Patent KR-20010072564-A (KR)
Title: 루푸스 및 관련된 신장 질환의 치료 및/또는 반전에사용되는 안티 ｇｐ39 항체의 용도
IPC: C07K14/525
Filed: 1999-04-02
Abstract: 본 발명은 안티 gp39 항체들 또는 단편들을 사용하여 루푸스를 치료하는 방법을 제공한다. 이러한 치료는 질환, 특히 루푸스 피검자의 주요한 사망 원인인 루푸스 관련된 신장 질환을 반전시킴을 보여주었다.
Patent KR-20010042982-A (KR)
Title: 운송 및 전시 용기
IPC: B65D5/54
Filed: 1999-12-03
Abstract: 본 발명은 물품을 운송, 저장 및 전시하도록 형성된 용기(10)에 관한 것이다. 상기 용기는 연속적인 절단선(30)에 의해 연결된 상부(21-23)와 하부(234-27)를 포함하고, 상기 상부는 상호협력하여 용이하고 깔끔하게 제거되어 배치될 수 있는 용기 상단부를 형성하고, 상기 하부는 상호협력하여 수납된 물품을 전시하기 위해 유지하는 용기 저면부를 형성한다. 상기 용기는 운송, 클램핑, 적층 동안 만족스러운 보호성을 제공하는 재료 및 형상 특성을 갖는다.
Patent KR-20010052946-A (KR)
Title: 카르보닐디이미다졸의 제조 방법
IPC: C07D233/56
Filed: 1999-06-14
Abstract: 불활성 용매중 이미다졸 및 포스겐으로부터 카르보닐디이미다졸의 제조 방법에 있어서, 이미다졸 염산염 결합 생성물을 생성된 반응 혼합물로부터 상분리에 의해 용용물 형태로서 분리하는 것을 특징으로 하는 방법이 개시되어 있다.
Patent KR-20010071607-A (KR)
Title: 방적사 처리 시스템
IPC: B65H51/22
Filed: 1999-07-08
Abstract: 본 발명은 예를 들면 하우징(G,G1,G2)을 구비하는 방적사 공급기(F)와 같은 방적사 처리 시스템에 관한 것인데, 여기에는 적어도 하나의 반도체 구성부(C)가 인쇄 회로 기판(B)상에 배치되어 있다. 상기 구성부는 열 전도체(W)상에 배치되는데, 이것은 하우징과 접촉하며 인쇄 회로 기판(B)을 통해서 반도체 구성부(C)까지 연장되는 하우징(G,G1,G2)의 적어도 하나의 연장부(P,P')이다.
Patent KR-20020061348-A (KR)
Inventor: KIM DAE CHEOL
IPC: C12P13/08
Filed: 2001-01-16
Abstract: PURPOSE: Provided is a process for producing L-threonine by using a microorganism of which chromosome DNA contains phosphoenolpyruvate carboxylase(ppc) gene and additionally at least one copy of phosphoenolpyruvate carboxylase(ppc) in its specific region, thereby dramatically increasing the production yield of L-threonine. CONSTITUTION: Phosphoenolpyruvate carboxylase(ppc) converses phosphoenolpyruvate into oxaloacetate which is a precursor for the biosynthesis of threonine. The production yield of L-threonine can be improved by increasing ppc gene expression. Wherein, the expression of ppc gene can be increased by increasing the copy number of ppc gene in chromosome DNA of a microorganism.
Patent KR-20010074528-A (KR)
Inventor: WETZEL ARIANE
IPC: B27K3/36
Filed: 2001-01-22
Abstract: PURPOSE: A method for protecting wood by treatment with sorbic acid and/or one or more salts of sorbic acid is provided. CONSTITUTION: Immersion Impregnation with Aqueous Potassium Sorbate Solution Air-dry pine boards are dipped into a solution of 30% potassium sorbate in water for event, visible soaking of the surface. After the treatment they are air dried. The boards are then stored in the open and only protected against direct rainfall at usual room temperature together with untreated boards for three weeks. After completion of the storage the untreated boards have intensive blue stain infection, which covers virtually the entire surface, while the treated boards, despite storage directly next to the infected boards, remain free from fungal infection. Compared with fresh wood, there is only a staining to give a pale brown color.
Patent KR-20020065055-A (KR)
Title: Method for optional transmitting information of caller identification in private branch exchange
Inventor: KIM SU GIL
IPC: H04Q3/70
Filed: 2001-02-05
Abstract: PURPOSE: A method for selectively transmitting caller ID information in a private exchange is provided to correspond to a caller ID option and selectively transmit information of a caller for variously transmitting information of the caller ID. CONSTITUTION: A control unit judges whether a caller ID is detected from an office line receiving signal(300). If the caller ID is detected from the office line receiving signal, the control unit retrieves a caller ID storing memory(304). The control unit judges whether a corresponding caller ID is stored(306). If the corresponding caller ID is stored, the control unit reads a subscriber-classified caller ID option(308). The control unit classifies caller information corresponding to the caller ID option from the read caller ID option(310). If the caller ID option is '0', the control unit corresponds to an extension subscriber number(312). If the caller ID option is '1', the control unit corresponds to an office line number(314). If the caller ID option is '2', the control unit corresponds to an extension subscriber number and an office line number(316). The control transmits information of the caller corresponding to the corresponding caller ID(318).
Patent KR-20010074076-A (KR)
Inventor: KIM JEUNG HUN
IPC: H04R1/20
Filed: 2001-02-07
Abstract: PURPOSE: A speaker is provided to reduce peak and dip at frequency response characteristics and improve directivity by employing an air tube for the suspension. CONSTITUTION: A tube type edge(3) having an elliptical cross section is arranged at the edge of a cone sheet(1) and a frame(2). The edge serving as an external suspension is attached to the edges of the cone sheet and the frame, respectively, so as to prevent mutual influence between acoustic waves radiated from the front surface and rear surface of the speaker unit. A damper(4) serving as an internal suspension is fixed to the frame and at the portion immediately above a voice coil(5) so as to allow the voice coil to be accurately located at the center of the magnetic circuit. The edge and the damper are made up of an elastic material, such that only the shape of cross section of the edge changes, without being influenced by an air pressure or elasticity of the elastic material forming the edge and damper, until an amplitude reaches a predetermined level. The shape of the cross section of the edge, air pressure and elasticity of the elastic material exert influence to the control of the cone sheet when the amplitude is higher than a predetermined level.
Patent KR-20020073797-A (KR)
Title: Iron pillar for street lamp and manufacturing method thereof
Inventor: CHO SUNG JIN
IPC: E04H12/24
Filed: 2001-03-16
Abstract: PURPOSE: A cast iron made lamp post and a manufacturing method thereof are provided to permanently prevent the corrosion of the post, and to improve the durability and the convenience of maintenance thereof. CONSTITUTION: The manufacturing method of the cast iron made lamp post comprises the steps of; washing impurities attached on the surface of a cast iron pipe forming the lamp post; forming an alloy layer on the cast iron pipe by steeping the cast iron pipe in molten zinc within a temperature region of 480 to 500deg.C; forming fine indented portion on the surface of the post; and coating the surface of the post.
Patent KR-20020074563-A (KR)
Title: Functional Yanggaeng Composition Containing Extracts of Soft Core of Antlers
Inventor: NAM HAE YOUNG
IPC: A23G3/00
Filed: 2001-03-20
Abstract: PURPOSE: A sweet jelly composition of beans containing a pilose antler extract containing crude drug other than conventional materials such as red bean jam, sugar, starch syrup, agar, water and salt is provided. Therefore, the composition is excellent in physical properties such as elasticity, cohesive property, chewability, etc. as well as having the pharmacological efficacy of pilose antler. CONSTITUTION: This sweet jelly composition of beans contains 10 to 70% by weight of a pilose antler extract, based on the weight of red bean jam and additionally at least one selected from the group consisting of Cnidium rhizome, Glycyrrhizae Radix, Rehmanniae radix, Paeonia albiflora Pallas, Rhizoma Zingiberis, Angelica gigas, Cordyceps sinensis, Ganoderma lucidum, Lycium chinense, Zizyphus jujuba, Astragali radix, Aurantii Nobilis Pericarpium, Pueraria thunbergiana Benth and ginseng. The composition additionally contains 0.1 to 20% by weight of spirits, based on the weight of red bean jam.
Patent KR-20010095021-A (KR)
Title: Semiconductor memory and method of saving energy of the memory
Inventor: NISHIOKA NAOHISA
IPC: G11C7/12
Filed: 2001-03-27
Abstract: PURPOSE: To reduce current consumption by preventing pre-charge operation from being performed at the time of a write-mode. CONSTITUTION: The semiconductor memory is provided with a balancer circuit column 2, balancer driving circuit column 72, a pre-charge driving circuit column 9, and a pre-charge circuit column 4 being arranged adjacent to a memory cell array 1. Write-signal WRITE being made 'high' at the time of a write-mode is inputted to a NOR gate of a pre-charge driving circuit 91 with an I/O balance signal BIO1 at the time of a write-mode. A MOSFET of a pre-charge circuit 4a1 is prevented from turning on by the NOR gate output kept to a low level all the time.