baber/WOPTO huggingface dataset:
Patent KR-20000020565-A (KR)
Title: Method for isolation of semiconductor device
Inventor: HWANG SEUN HA
IPC: H01L21/76
Filed: 1998-09-22
Abstract: PURPOSE: A method for isolating a semiconductor device is provided to prevent the generation of a groove on a top edge of an isolation film. CONSTITUTION: A method comprises the steps of: forming a first insulation film, an etch stop film and an oxide film on a semiconductor substrate(21) in sequence; forming an oxide film pattern, an etching stop film pattern and a first insulation film pattern which defines the surface of the semiconductor substrate as an active region and a field region by patterning the oxide film, the etching stop film and the first insulation film; forming a trench by etching the semiconductor substrate of the field region using the oxide film pattern, the etching stop film pattern and the first insulation film pattern as etch masks; etching the both side of the etching stop film pattern selectively; wrapping the top edge part of the trench by forming a side wall strengthening film(37); removing the oxide film pattern after filling the trench with an insulation material and forming a second insulation film(39) which is buried in the trench; and removing the etching stop film pattern and the first insulation film pattern in sequence. The formation of a groove is prevented during the cleaning process because the side wall strengthening film wraps the top edge part of the trench.
Patent KR-20000020678-A (KR)
Title: Apparatus and method for performing remote downloading in operator control system
Inventor: SHONG IN SU
IPC: G06F15/16
Filed: 1998-09-23
Abstract: PURPOSE: An apparatus and a method for performing a remote downloading in operator control system is provided to change frequently programs by using a remote downloading. CONSTITUTION: An apparatus for performing a remote downloading in operator control system comprises a serial port, a CPU(40), a latch circuit(50), a flash memory(60), an SRAM(70), and a converter. A method for performing a remote downloading comprises the steps of: loading a loader for refreshing the flash memory to an upper address of the SRAM; determining a request of downloading; performing a jumping to a loader of the upper address; receiving a program code through the serial port; storing the program code to the address 0 of the flash memory; determining a reception of the last data; and performing a jumping to the address 0 of the flash memory.
Patent KR-20000021119-A (KR)
Title: Clamp of electrical insulation type
Inventor: LEE DONG WOO
IPC: H02G3/30
Filed: 1998-09-25
Abstract: PURPOSE: A clamp of electrical insulation type is used to fix electric wires and pipes, has no danger in electric shock, and is used for a long time without a corrosion. CONSTITUTION: A duramen(104) is made of a belt-type metal having an intensity and a ductility which are required to a damaged paper of a subject object. A clamp(100) surrounds an external surface of the duramen(104), and has an electrical insulation characteristic, and includes a coating(102) as of a good corrosion proof. A material of the coating(102) has a good durability. Thereby, the clamp(100) of electrical insulation type is used to fix electric wires and pipes, has no danger in electric shock, and is used for a long time without a corrosion.
Patent KR-19990037383-A (KR)
Title: 평판형 재료를 공급하는 장치
IPC: B65G49/06
Filed: 1998-10-26
Abstract: 활주가능한 캐리지가  자기 추진형 평판 제거기와 결합된다.     평판 제거기는  하적 (unload position) 위치에  원하는 캐리지를 이동시킨 후,  평판 제거위치로 진행한다.     흡입 컵으로 원하는 캐리지상에  1장의 평판 유리를 흡입한후,  평판 제거기가  후퇴하며,  컨베이터의 수평위치로 회전하여,  흡입이 해제된다.
Patent KR-20000027080-A (KR)
Title: Early warning light system of braking lamp for vehicle
Inventor: KIM CHANG HYUN
IPC: B60Q5/00
Filed: 1998-10-26
Abstract: PURPOSE: A system is provided to inform a driver in a rear vehicle of driving information of a front vehicle for a safety drive. CONSTITUTION: A system is composed of a braking light(2), a back up light(3), a turn signal light(4) and a fog light(5). Therefore, the system adjusts the number of lighting until stopping a vehicle(1) in a diverting range of a brake pedal(7). The system flickers the braking light in a starting state and a parking state as well as lighting the braking light in a neutral state of a transmission.
Patent KR-20000027854-A (KR)
Title: Method and device for desulfurization and denitration
Inventor: CHO YONG JUN
IPC: B01D53/60
Filed: 1998-10-29
Abstract: PURPOSE: A method for desulfurization and for denitration among exhaust gas is provided to remove by generating a sulfuric acid ammonium and a nitric acid ammonium with reacting with a counter agent in a neutralized reacting device after converting a SO2 and a NOx contained in exhaust gas to a H2SO4 and a HNO3 by processing with electronic rays. CONSTITUTION: An SO2, and a NOx contains in exhaust gas are oxidized to a sulfuric acid and a nitric acid through a radical reaction by reacting with electronic rays irradiated from an accelerator of electric rays(21) by flowing exhaust gas ventilated from a boiler(10) into a reactor of electric rays(20). The processing efficiency of electric rays is improved by maintaining the high temperature inside the reactor of electric rays(20). The oxidized sulfuric acid and the nitric acid are generated to a neutral chloride of a sulfuric acid ammonium and a nitric acid ammonium by reacting with an alkali aqueous solution sprayed from a spray of alkali aqueous solution(40) inside a moving duct(50) moved to an electric collector(14). The sulfuric acid ammonium chloride and the nitric acid ammonium chloride are removed by collecting in the electric collector(14), and the purified exhaust gas is released to air by delivering to a chimney(16) through a ventilator(15).
Patent KR-20000028388-A (KR)
Title: Charging method of chargeable vacuum cleaner
Inventor: CHOI JEONG CHEOL
IPC: H02J7/00
Filed: 1998-10-31
Abstract: PURPOSE: A charging method for a chargeable vacuum cleaner is provided to select charging time according to necessity by making a charger perform charging steps by selecting the time. CONSTITUTION: To charge a vacuum cleaner, a body is settled in a charger for supplying power supply via a plug. Then, a power supply switch is turned on for setting desired time via a key matrix to make a microcomputer recognize the input of the set up charging time. The set up charging time is checked for comparing and setting which time the set up time is correspond among a first, a second, or a third time by the microcomputer. The result is outputted via a terminal(T1) of a corresponding timer. Herein, the outputs of the other terminals(T2,T3) are opened by the microcomputer. Then, the completion of the charging time is recognized by the microcomputer. The output of high level via the terminal is stopped for displaying the completion of the charging time by feeding driving output to a display.
Patent KR-19990014389-A (KR)
Title: 디-리모넨을 함유한 의류용 세제 조성물
Filed: 1998-11-04
Abstract: 본 발명은 의류용 세제 조성물에 관한 것으로, 천연 식물성 용제인 D-리모넨과 유화제를 주 성분으로 하고, 고급 지방산 오일, 다가 고급 알코올, 글리콜, 아민 화합물, 활성 효소 등을 특정비율로 혼합한 본 발명의 세제 조성물은 물 세탁이 금지되어온 모, 견직물 또는 마에 대해서도 물 세탁 효과가 뛰어날 뿐 아니라 종래와는 달리 침지방법으로도 세탁이 가능하여 물 세탁후에도 원단의 내수축 효과를 가지면서 세정력 및 내동결성이 우수하다.
Patent KR-19990045714-A (KR)
Title: 벌꿀 고추장의 제조방법
Filed: 1998-12-29
Abstract: 본 발명은 벌꿀이 함유하고 있는 의학적 기능은 물론 각종 미네랄과 비타민이 풍부한 벌꿀을 주원료로 하여 고추장을 자연상태에서 숙성 제조함으로써 맛과 영양소는 물론 향기면에서도 기존 고추장에 비해 기호도를 향상시킨 벌꿀 고추장의 제조방법을 제공한 것이다.
Patent KR-20000045038-A (KR)
Title: Method for controlling an inertial rotation of a washing reservoir of a washing machine
Inventor: NAM TAE YEOL
IPC: D06F33/02
Filed: 1998-12-30
Abstract: PURPOSE: A method for controlling an inertial rotation of a washing reservoir is provided to reduce overall washing time by stopping the inertial rotation of a washing reservoir with an application of a friction force or water pressure. CONSTITUTION: It is judged whether dehydration by the execution of dehydration operation is completed(S202). If the dehydration is completed as the judgement result, an inertial rotation of a washing reservoir is stopped by immediately supplying rinsing water between the washing reservoir and the water reservoir(S203). After stopping the inertial rotation of the washing reservoir, the rinsing operation is executed(S204), to thereby shorten overall washing time by stopping the inertial rotation of the washing reservoir with an application of a friction force or water pressure.
Patent KR-20000045898-A (KR)
Title: Method for forming bit-line contact of semiconductor device
Inventor: CHO YEONG MAN
IPC: H01L21/28
Filed: 1998-12-30
Abstract: PURPOSE: A method for forming a bit-line contact of a semiconductor device is to simultaneously and efficiently form the bit-line contact and a storage node contact without any residue. CONSTITUTION: A method for forming a bit-line contact of a semiconductor device comprises a first step of forming a device separating layer(15) on a semiconductor substrate(10) and stacking a gate oxide layer(20), a word-line layer(30) and a word-line mask layer(40) on the device separating layer in order and performing an etching process using a photoresist layer(50) to partially eliminate the word-line mask layer, a second step of removing the photoresist layer on a main cell drain and blanket-etching the word-line mask layer, the word-line mask layer and the gate oxide layer to form a gate with a lower phase difference, a third step of removing the photoresist on a peripheral circuit area and then stacking an interlayer dielectric layer on an entire area, a fourth step of etching the interlayer dielectric layer on the peripheral circuit area using a chemical mechanical polishing method to expose the word-line mask layer, and a fifth step of forming a bit-line contact and a storage node contact.
Patent KR-20000046356-A (KR)
Title: Multiplexing/demultiplexing apparatus between tributary unit group-2 and synchronous transport module-1 in fiber loop carrier system
Inventor: KWAK KYONG KAB
IPC: H04L5/00
Filed: 1998-12-31
Abstract: PURPOSE: A multiplexing/demultiplexing apparatus between a TUG-2(Tributary Unit Group-2) and an STM-1(Synchronous Transport Module-1) in the fiber loop carrier system is provided to carry out a multiplexing/demultiplexing function between a TUG-2 and an STM-1. CONSTITUTION: An AU-3(Administrative Unit-3) formation unit(310) receives a TUG-2 and outputs it into an AU-3. An STM-1 formation unit(320) forms an STM-1 by multiplexing a section overhead to the AU-3. A scrambler(330) carries out scrambling for the STM-1. An optical connection unit(340) converts the scrambling processed STM-1 into an optical signal. An STM-1 receiving unit(350), after carrying out descrambling for the STM-1 searched from the electrical data outputted from the optical connection unit(340), outputs an AUG(Administrative Unit Group). An AU-3 extraction unit(360) extracts and outputs a VC-3(Virtual Container-3). A TUG-2 extraction unit(370) extracts the TUG-2 from the VC-3 outputted from the AU-3 extraction unit(360).
Patent KR-19990044462-A (KR)
Title: 전력 변환 장치 및 전력 변환 방법
IPC: H02M5/27
Filed: 1996-09-04
Abstract: 본 발명은 가변 속도로 고전압 AC 모터를 구동시키기위한 전력 변환 장치와 전력 변환 방법에 관한 것이다.   종래의 인버터 시스템은 에너지 보존, 자원 보존, 소형화, 효율 증대 및 시장에서 필요한 환경의 개선을 위한 전압 및 전류 파형 왜곡 억제와 같은 기술적 문제를 해결할 수 있으며, 고장시에, 정상 부분으로 동작이 수행되도록, 중복의 개선의 다른 기술적 문제를 해결할 수 없었다.   본 발명에서, 가변 속도에서 고전압 AC 모터를 구동시키기 위한 다중 3상 펄스폭 변조 사이클로컨버터 시스템이 사용되고, 2 방향 반도체 스위치 (11에서 16) 는 3상/단상 펄스폭 변조 사이클로컨버터 (1에서 9까지) 의 단상 AC 단자 (u, v) 에 출력되는 AC 출력의 전압이 각각의 장치에서 같은 상을 갖지만, 기본파 전압 위상의 전기각은 고전압 AC 모터 (10)를 구동하기 위하여 3개의 장치사이에서 서로 120도 만큼 드르도록 제어된다.   사이클로컨버터 (1에서 9까지) 중의 하나가 고장나면, 고장난 사이클로컨버터의 단상 AC 단자 (u, v) 는 쇼트회로가 되며, 고장난 사이클로컨버터와 같은 그룹내의 다른 2 개의 장치의 사이클로컨버터의 3상 AC 단자 (r, s, t) 에 접속된 2 개의 2 방향 반도체 스위치로 각각 이루어진 3 세트의 스위치는 가변 속로 고전압 AC 모터를 구동시키기 위하여 3세트의 2 방향 반도체 스위치를 쇼트회로로 하기 위하여 같은 시간 간격으로 한 세트씩 연속적으로 전도성으로 된다.
Patent KR-19990072061-A (KR)
IPC: G01C21/28
Filed: 1996-11-29
Abstract: The invention relates to a vehicle navigational system with a radar arrangement and an image sensor arrangement. It is proposed to derive target parameters separately from the receiving signals of the two arrangements and to convey them to data merging means to link the separately derived parameters. Linking can be carried out at different levels of digital signal processing.
Patent KR-19990082114-A (KR)
IPC: A61K6/06
Filed: 1997-01-29
Abstract: A novel silica based bioactive glass composition that can be used in conjunction with a delivery agent such as a toothpaste, gel, etc. having a particle size range <90 mum which will form a rapid and continuous reaction with body fluids due to the immediate and long term ionic release of Ca and P from the core silica particles, to produce a stable crystalline hydroxy carbonate apatite layer deposited onto and into the dentin tubules for the immediate and long term reduction of dentin hypersensitivity and tooth surface remineralization.
Patent KR-19990087663-A (KR)
Title: 생물학적 물질 보존배지
IPC: C12N1/04
Filed: 1997-03-05
Abstract: 생리식염수 용액, 변성된 유체 젤라틴 및 사람 혈청 알부민을 포함한 생물학적 물질의 보존 및/또는 동결용 배지가 기술됨.
Patent KR-20000051389-A (KR)
Title: Microwave oven
Inventor: PARK SANG JUN
IPC: F24C7/02
Filed: 1999-01-21
Abstract: PURPOSE: A microwave oven is provided to prevent artificial insertion of impurities such as wire into a cook room via a gap between a holding hole and a protrusion of a case of the microwave oven, thereby increasing the safety and reliability of the product. CONSTITUTION: A microwave oven includes a case(11) mounted with front and rear panels for forming an inner space, a cook room defined in an upper part of the case and opened and closed by a door, a machinery chamber defined in a lower part of the case and disposed with a magnetron for oscillating microwaves, a tube and other electric parts such as a high pressure transformer, an opening part(31) penetrated at one side of the case to be communicated with the tube and formed with holding holes(32) around edge parts, a cover element(40) formed with protrusions(42) detachably coupled in the holding hole and an elastic piece(43) at an edge part(41), and a shut-off element(70) mounted on the edge part and having integrally formed ribs(71) for shutting off impurities introduced via a clearance formed between the holding hole and the protrusion.
Patent KR-20000052124-A (KR)
Title: Antenna withdrawal apparatus of handphone
Inventor: KIM YOUNG GU
IPC: H04B1/38
Filed: 1999-01-29
Abstract: PURPOSE: Antenna drawing device in cellular phone is provided to prevent the toxic electromagnetic wave emitting to the outside and make the cellular phone usage comfortable. CONSTITUTION: Antenna drawing device in cellular phone comprises the part of: the flexible lake part subject to the low part of antenna(11) inside the cellular phone main body(10); pinion(31) combined with the lake part(20); motor part(30) spinning the pinions, elevating the lake part and antenna automatically; guide rail(40) located on each side of lake part supporting the lake part in case of elevating.
Patent KR-19990037857-A (KR)
Title: 수직축형편심가변익풍차구조및수직구동축의자동변속방법
Filed: 1999-02-05
Abstract: 본 발명은 발전장치를 구동하는 수직축형편심가변익풍차구조및 수직구동축의자동변속방법에 관한 발명으로,모멘트지지부재(3)의 종단부에 완충체(8)를 반환점으로  반전을 계속하는 편심가변익(A';B';C';D')을 설치하여 수직구동축(2)을 가동케 하는 구조를 형성하며, 수직구동축(2)에는 그 회전수를 감지하는 RPM센서에 의해 발전장치(1)의 자동변속기를 제어되는 방법으로 형성함으로써, 이 풍차의 편심가변익(A';B';C';D')이 풍향과 풍속의 변화에 순응하면서 항상 강한 맞바람에 의한 구동력을 발생시키게 함은 물론, 종래의 고정익 풍차처럼 풍향의 역행측에서 날개의 회전저항력이 거의 발생하지 않고 오히려 일부 역행측의 편심가변익은 순행측의 경우보다 큰 모멘트의 회전력이 발생되게 하며, 특히 풍속에 따라 발전장치가 자동변속되게 함으로써 풍차의 구동효율이 향상되고 태풍이 부는 경우에는 풍차의 무부하회전이 실현되어 풍차의 파손이 방지되도록 한 수직축형편심가변익풍차의 구조및 수직구동축의자동변속방법에 관한 것이다.
Patent KR-19990077721-A (KR)
Title: 개별 룸과 연관된 대용량 기억 주변 장치
IPC: G06F3/06
Filed: 1999-03-09
Abstract: 호스트 컴퓨터와 함께 사용되는 대용량 기억 주변 장치는 데이터 매체, 및 데이터 매체로부터 정보를 판독하기 위한 센서를 구비하여, 컴퓨터로 전송하기 위한 데이터 신호를 발생시킨다.  컴퓨터 판독 가능 정보를 포함하는 메모리 장치가 제공되어 대용량 기억 주변 장치를 특성화하고, 데이터 전송 경로는 컴퓨터가 메모리 장치에 포함된 정보를 액세스함으로써 제공되어 대용량 기억 주변 장치를 특성화한다.  대용량 기억 주변 장치를 특성화하기 위한 컴퓨터 판독 가능 정보는 물리 데이터 정의를 포함한다.  또한, 컴퓨터를 개시하기 위한 방법이 제공된다.  본 방법은 대용량 기억 주변 장치의 메모리로부터 데이터를 판독하는 단계, 및 메모리로부터 판독된 데이터에 기초하여 컴퓨터를 구성하는 단계를 포함한다.
Patent KR-20000065347-A (KR)
Inventor: CHO SEUNG YONG
IPC: A23L3/00
Filed: 1999-04-02
Abstract: PURPOSE: Method for preparing an edible and degradable film using bean-curd dregs or whey provides a film as a packing material for food, which has excellent screening ability and economical efficiency. CONSTITUTION: An edible and degradable film is provided by smelting in water plasticizer and protein concentrate made of bean-curd dregs or whey under a condition of pH 9-11 and 70-100°C, and then adding organic acid as a crosslinker, and then pouring the composite on a plate for cooling dry. The protein made of bean-curd dregs is prepared by extracting alkali from soluble components of bean-curd dregs, regulating pH on the isoelectric point, precipitating protein, reiterating the process to clear away supernatant until lactose is removed, and then removing grease from precipitated protein. The protein made of whey is prepared by adding water to whey, processing with heat, regulating pH on the isoelectric point, precipitating protein, reiterating the process to clear away supernatant until lactose is removed, and then removing grease from precipitated protein. The plasticizer such as glycerol or propylene glycol is added 45-75wt% if protein concentrate made of bean-curd dregs, and 35-45wt% if protein concentrate made of whey.
Patent KR-20000065813-A (KR)
Inventor: LEE IN SEONG
IPC: H01M2/12
Filed: 1999-04-09
Abstract: PURPOSE: A safety device of a battery is provided to protect safely a battery by controlling the current according to the temperature of the battery. CONSTITUTION: A safety device of a battery comprises a support body, a terminal member, a first metal member(38), and a second metal member(39). The support body is connected with a case of a battery. The terminal member comprises an exhaust hole combined with the support body. The first metal member is combined with a lower portion of the exhaust hole in order to seal the exhaust hole. The second metal member is installed at a lower portion of the first metal member. The second metal member comprises a grounding portion grounded with the first metal member.
Patent KR-20000067007-A (KR)
Inventor: YANG SEONG RYEOL
IPC: H04B7/00
Filed: 1999-04-22
Abstract: PURPOSE: A vehicle LAN(Local Area Network) system provided with a simple multi-user test function is provided to check the abnormality of various devices comprised in a vehicle LAN system without the necessity of using other special interface chip and MUT(Multi-User Test) devices. CONSTITUTION: An ETACS(Electronic Time Alarm Control System)(10) carries out two-way communication with a keyless entry part(12) receiving a door lock/unlock signal, a trunk open signal, a power window lock signal and a remote start-up signal transmitted from a radio transmitting remote control(11). An in-panel(20) carries out one-way communication with a cluster(22), a multi-functional switch(21) and a front ECU(23). The front ECU(23) operates various lamps and wipers according to the control signals inputted from the multi-functional switch(21). An assist door module(34) assists the operation of a drive door module(30) adjusts the location of the assistant driver seat outside mirror. A simple MUT part(43) outputs mode signals, such as a self-diagnostic mode signal, an actuator driving signal, a switch status check mode signal, to diagnose system components.
Patent KR-20000073404-A (KR)
Inventor: PARK MYEONG HO
IPC: G09G3/296
Filed: 1999-05-10
Abstract: PURPOSE: A method and an apparatus for driving plasma display panel using high frequency are provided to prevent generation of contour noise and to simplify the construction of driving circuit. CONSTITUTION: A method and an apparatus for driving plasma display panel using high frequency include the following steps. An analog to digital convertor(72) receives analog video signals to samples and outputs the received analog video signals. A line memory(74) temporarily stores sampling video signals inputted from the A/D convertor(72). A controller(76) rearranges the video signals of luminance level in order as one scanning line stored by line memory(74) and generates driving signals time difference according to the luminance level. A data driver(78) generates data triggering signal(DTS) based upon the driving signal from controller(76) to drive an address electrode lines plasma display panel(PDP)(80).
Patent KR-20000073769-A (KR)
Inventor: KIM DAE SU
IPC: H04Q1/20
Filed: 1999-05-14
Abstract: PURPOSE: A method for according channel information of an exchange space switch is provided to perceive connection/nonconnection states to inform an operator of the channel information in transceiving states, so as to prevent a crosstalk and silence generated when transceiving channels are not connected. CONSTITUTION: A switch network controlling block requests a space division switch processor to transmit a control signal for connecting channels. The space division switch processor stores transmitting/receiving channel information transmitted from the switch network controlling block. The switch processor compares whether the transmitting channel information is equal to prestored transmitting channel information. If so, the switch processor transmits a control signal for connecting a transmission channel to a processor control interfacing board. The processor control interfacing board decides whether both of an A side and a B side are connected to the transmission channel by the control signal. If so, the switch network controlling block compares whether the receiving channel information is equal to prestored receiving channel information. If so, the switch processor transmits a control signal for connecting a reception channel to the processor control interfacing board. The interfacing board decides whether both of the A side and the B side are connected to the reception channel by the control signal. If so, the interfacing board transmits a completion signal for indicating the transmission/the reception channel connections to a mobile subscriber call controlling block.
Patent KR-19990088300-A (KR)
IPC: H01L21/84
Filed: 1999-05-14
Abstract: 본 발명은 SOI-반도체 장치 및 그것의 제조 방법에 관한 것이다.  반도체 장치는 특히 기판에 의해 형성되고 반도체 재료로 이루어진 베이스층(1), 상기 베이스층(1) 위에 배치된 절연층(2) 및 상기 절연층(2)에 접하며 단결정 실리콘으로 이루어진 층(3')을 포함한다.  패시베이션 물질은 절연층(2)과 단결정 실리콘층(3') 사이의 경계면(7) 영역에서 Si-X 결합을 형성하면서 존재하고, Si-X 결합의 결합 에너지는 Si-H 결합의 결합 에너지보다 크다.
Patent KR-20000074505-A (KR)
Inventor: KIM SEOK SAN
IPC: G11C11/417
Filed: 1999-05-21
Abstract: PURPOSE: A logic interface circuit is provided which can convert a level using logic gates such as an inverter, an NAND gate and an NOR gate of an output terminal of function blocks in a chip without adding a level shifter. CONSTITUTION: A logic interface circuit comprises: a logic gate comprising a pull-up transistor(P1) to pull up an output terminal in response to at least more than one input signal and a pull-down transistor(N1) to pull down the output terminal; a current counterflow preventing circuit(N2) to prevent the current counterflow from the pull-up transistor to the first power source voltage by being connected between the first power source voltage and the pull-up transistor; a precharge circuit(P2) which is to precharge a common point of the current counterflow preventing circuit and the pull-up transistor to the first power source voltage in response to a signal from the output terminal, being connected in parallel with the current counterflow preventing circuit; and a current counterflow preventing and boost circuit(P3) which is connected between the second power source voltage and the output terminal, and prevents the current counterflow from the output terminal to the second power source voltage by being off in response to the first power source voltage in case that the first power source voltage is higher than the second power source voltage, and boosts the output terminal to the second power source voltage by being on in response to at least more than one input signal in case that the first power source voltage is lower than the second power source voltage. Therefore, the circuit can shift level by adding a simple circuit to a logic gate such as an inverter(11), an NAND gate and an NOR gate.