baber/WOPTO huggingface dataset:
Patent KR-19990063515-A (KR)
Title: 기판처리방법 및 장치와 soi기판
IPC: H01L21/306
Filed: 1998-12-26
Abstract: 본 발명의 목적은 다공질실리콘층을 에칭에 의해 제거하는 공정에 있어서, 양호하게 에칭처리를 행할 수 있는 기판처리방법을 제공하는 것이다.  이 목적을 달성하기 위하여, 기판 처리방법은, 단결정실리콘기판의 주표면에 다공질실리콘층을 형성하는 양극화성공정과, 다공질실리콘층상에 단결정실리콘막을 성장시키는 실리콘막형성공정과, 단결정실리콘막의 표면을 산화함으로써 얻은 제1기판과, 지지기판으로 되는 제2기판을 접합시켜서 제1기판의 하부면쪽으로부터 단결정실리콘부분을 제거하여 다공질실리콘층을 노출시키는 제거공정과, 노출된 다공질실리콘층을 에칭하여 단결정실리콘막상으로부터 다공질실리콘층을 제거하는 에칭공정을 포함하고, 양극화성공정후의 세척시에 제1기판이 전해질용액에서 제거되어 세척할 때까지 대기중에 노출된 시간을 에칭공정에서 다공질실리콘층이 단결정실리콘막상에 잔류하는 것을 방지하는 범위내로 한정한다.
Patent KR-20000042822-A (KR)
Title: Method for utilizing integrated application service by integrated management of communication network operation management systems with heterogeneous operating environment
Inventor: KIM BEOM SU
IPC: H04L12/24
Filed: 1998-12-26
Abstract: PURPOSE: A method for utilizing an integrated application service by an integrated management of communication network operating systems with a heterogeneous operating environment, is provided integratively to manage function modules such as a graphic user interface, communication protocol, and an interlocking interface. CONSTITUTION: A method for utilizing an integrated application service by an integrated management of communication network operating systems with a heterogeneous operating environment, contains steps. At the first step, an integrated shifts, registers, and deletes information on an interlocking interface of a communication network management system which becomes an integrated object. At the second step, the integrated operating management system generates the integrated application service by use of the information on the interlocking interface.
Patent KR-20000044146-A (KR)
Title: Fan motor
Inventor: MUN BYUNG HEE
IPC: H02K5/24
Filed: 1998-12-30
Abstract: PURPOSE: A fan motor is provided to enhance the quality with the reduction of a rejected rate and the more enhancement of the adhesion strength by attaching a rotor yoke to the rotor body. CONSTITUTION: A rotor has plural grooves(13) on the adhesion surface(12) on which a rotor yoke. An adhesive is evenly coated on the junction adhesion(12) to attach the rotor yoke. The grooves(13) are positioned on the center of a width of the adhesion surface(12) of a rotor body(10). The grooves(13) are spaced apart in the same interval. Excessive adhesive is absorbed in the grooves(13) in order to form an adhesion layer of a uniform thickness between the adhesion surface(12) and the rotor yoke. A rotation shaft(20) is connected in the center of the rotor body(10)
Patent KR-20000045281-A (KR)
Title: Output buffer enable circuit
Inventor: LEE JONG HYUB
IPC: H03K19/00
Filed: 1998-12-30
Abstract: PURPOSE: An output buffer enable circuit is provided to improve a process speed and to prevent an abnormal operation by controlling an output buffer differently according to a voltage level of a power supply voltage. CONSTITUTION: An output buffer enable circuit comprises a power level detector(400) which detects a voltage level of a power supply voltage(Vcc) to generate a detect signal(VDC) and an inverted version of the detections signal(/VDC). An enable signal generator(500) consists of a first signal generating section(510) and a second signal generating section(520). The first signal generating section(510) receives output signals(SAout,/SAout) of a sense amplifier(100), a sense amplifier enable signal(SAE) and an output enable signal(/OE) in response to the detection signal(VDC), and outputs an output buffer enable signal(POE) to an output buffer(200) when a high power supply voltage is applied. The second signal generating section(520) receives the output enable signal(/OE) and an address transition detecting signal(ATD) in response to the inverted version of the detection signal(/VDC), and outputs an output buffer enable signal(POE) to the output buffer(200) when a low power supply voltage is applied.
Patent KR-20000046080-A (KR)
Title: Tissue culture method of lily using absorbent cotton
Inventor: SEONG MOON SEOK
IPC: A01H4/00
Filed: 1998-12-31
Abstract: PURPOSE: A tissue culture method of lily using absorbent cotton is provided which uses the absorbent cotton for a liquid stationary culture of lily instead of using a medium anticoagulant such as agar and gellan gum, so it makes the production cost of caruncle reduced, fulfills many furnishing tables of caruncle to subculture and harvest by preventing the leaf development. CONSTITUTION: A tissue culture method of lily using absorbent cotton is comprised the following steps; adding 60-120 g/L sugar and the absorbent cotton into the MS(Murashige and Skoog) basal liquid medium; inoculating a ramentum of lily caruncle on the medium; and culturing at 4,500 Lux.
Patent KR-20000047227-A (KR)
Title: Duplicated circuit of synchronization signal of wll system
Inventor: KANG SUK WON
IPC: H04L7/00
Filed: 1998-12-31
Abstract: PURPOSE: A duplicated circuit of synchronization signal of WLL SYSTEM(Wireless Local Loop System) is provided to protect a data loss and noise generation in duplicating a switching by synchronizing a clock to each time switch on the time of switching on or setting reset in a duplicated time switch of Wireless Local Loop System. CONSTITUTION: A circuit of synchronization signal duplication of Wireless Local Loop System includes a first and second frequency demultiplexers(51,52) demultiples clock signal of 2.048MHz provided from a network synchronization section(25) and outputs a frame synchronization signal of 8 KHz and a clock signal of 2.048 MHz. First and second buffers(BUF1,BUF2) temporally buffer the clock signals of the first frequency demultiplexers(51) and outputs the buffered signals according to a control signal. Third and fourth buffers(BUF3,BUF4) temporally buffer the clock signals of the second frequency demultiplexers(52) and outputs the buffered signals according to the control signal. First and second converter(NOT1,NOT2) convert the clock signals provided from the first and third buffers(BUF1,BUF3). First D-flip flop(53) receives the frame synchronization signals provided from the second and fourth buffers and outputs level signals at a rising edge of the clock signal converted from the first and second converters(NOT1,NOT2). A duplication control section(313) controls the outputs of the clock signal and the frame synchronization signal by forwarding control signals to the first buffer through fourth buffer.
Patent KR-19990071561-A (KR)
Title: 펄스형 비말 도포 장치의 작동방법
IPC: B41J2/055
Filed: 1996-11-22
Abstract: 잉크젯 프린트 헤드는 채널의 길이 방향으로 연장된 측벽에 의해 나란히 배열 및 하나 건너씩 이격 배열된 평행한 채널 어레이를 구비한다. 패턴 종속 크로스토크는 선택된 채널로부터 분사된 비말의 속도는 상기 선택된 채널에 인접한 채널이 상기 선택된 채널로부터 비말이 분사될 때 동시에 비말 분사가 이루어지도록 유사하게 작동하든지 안하든지에 관계없이 실제적으로 독립적이다.
Patent KR-19990076713-A (KR)
Title: 분산 감소 섬유를 포함하는 개선된 비선형 광학 루프 미러디바이스
IPC: G02B6/28
Filed: 1996-12-13
Abstract: 본 발명은 분리된 방향의 비대칭성을 갖는 비선형 광학 루프 미러 디바이스(10)에 관한 것이다.  분산 감소 광섬유(20)는 입력 펄스를 루프 주위에 반대방향으로 전파되는 두 성분의 펄스들로 분할시키고, 펄스들과 관계된 위상에 따라 반송되는 성분의 펄스들을 투과 및/또는 반사시키는 광커플러(30)에 의해 루프로 제조된다.  루프의 길이, 유효면적, 분산의 변화율 등과 같은 상기 루프의 변수들은 펄스들의 폭 또는 진폭들이 미리 결정된 한계치의 이상 또는 이하인지에 따라 입력 펄스들이 전환 또는 투과되도록 선택된다.
Patent KR-19990077024-A (KR)
Title: 아크롤레인 및 아크릴산의 제조방법
IPC: B01J23/887
Filed: 1997-12-02
Abstract: Mo, Bi, Fe를 필수성분으로 하는 산화촉매 및 고정상 다관형 반응기를 사용하여, 프로필렌을 분자상 산소 또는 분자상 산소함유 가스에 의해 기상 접촉산화시켜 아크롤레인 및 아크릴산을 제조하는 방법으로서, 
     a) 예를들어 담지촉매의 제조공정에서의 소성 조작의 상위에 의해 얻어진, 활성이 다른 복수의 담지촉매를 사용하고, 
     b) 반응관의 관 축방향으로 분할하여 형성시킨 복수의 촉매층을 설치하고, 
     c) 상기 복수의 담지촉매를 반응관 관 축방향의 원료 가스 입구부로부터 출구부로 향하게 하여, 활성이 보다 높게 되는 순서로 배치하는 것을 특징으로 하는 아크롤레인 및 아크릴산의 제조방법에 관한 것이며, 핫 스포트의 발생이 회피됨과 동시에, 장시간 안정하게 아크롤레인 및 아크릴산을 제조할 수 있다.
Patent KR-19990082286-A (KR)
Title: 울림 정보를 제공하기 위한 원격 통신 장치 및 방법
IPC: H04M19/04
Filed: 1997-11-13
Abstract: 원격 통신 장치는 울림 정보 메모리 수단, 및 멜로디와 같은 형태를 구비한 울림 정보 내용을 갱신하기 위한 울림 정보 메모리 갱신 수단을 포함하여 개시된다. 울림 정보 메모리 갱신 수단은 원격 통신 장치와, 사용자가 선택할 수 있고 다운로딩(download)할 수 있는 울림 정보의 다른 다양한 선택적인 형태를 포함하는 동떨어진 데이터 베이스 사이에서 통신 링크를 포함한다. 이것은, 사용자의 선호된 노래, 멜로디 등을 선택하기 위한 사용자의 선택의 자유를 제한하지 않음에도 불구하고, 전화일 수  있는 원격 통신 장치에 필요한 메모리 용량을 감소시킨다.
Patent KR-19990087178-A (KR)
Title: 병변조직 치료용 외용약제
IPC: A61K31/70
Filed: 1997-02-20
Abstract: 특히, 직장이나 항문의 병변조직을 치료하는데에 유효한 병변조직 치료용 외용약제가 제공된다. 
     병변조직 치료용 외용약제는, 탄닌산과 황산알루미늄칼륨으로 이루어지는 약효성분과, 외용약제 기제성분으로 구성되어 있고, 적용되는 제형으로서는, 예를 들면, 연고, 크림제, 좌약 등의 외용약제를 들 수 있다.
Patent KR-20000064966-A (KR)
Title: 기판의콘테이너및로더
IPC: H01L21/677
Filed: 1997-12-01
Abstract: 본원발명에서는, 반도체를 밀폐된 콘테이너로 운반함으로써 먼지 등에 의한 오염을 방지한다. 반도체를 가공하기 위해서는, 고청정실과 저청정실의 경계에 접해서 저청정실측에 설치된 로더에, 콘테이너를 탑재한다. 콘테이너의 뚜껑이 로더의 개구부에 설치된 문과 일체화되어 로더 내부를 하강하면, 콘테이너 및 고청정실이 개구되어, 콘테이너와 고청정실 사이에서 반도체가 이동할 수 있게 된다. 먼지를 발생시키는 기계적인 요소는 모두 저청정실측에 놓여 있기 때문에 고청정실측의 청정도를 높게 유지하는 것이 가능하다.
Patent KR-20000016025-A (KR)
Title: Semiconductor device having soi structure and method for manufacturing the device
Inventor: YAMAGUCHI YASUO
IPC: H01L29/78
Filed: 1996-06-14
Abstract: PURPOSE: A semiconductor device having such an SOI(silicon on insulator) structure that diffusion of impurities from the source/drain regions into the end portions of a silicon layer below a gate electrode is prevented is disclosed. CONSTITUTION: In this semiconductor device, a nitrogen (8) is introduced into at least one of the source/drain regions (14) and the end portions of the semiconductor layer (3). A first concentration peak of the nitrogen concentration profile is at least in one of the end portions of the regions (14) in the direction where the electrode (12) extends and the end portions of the layer (3). Because of the nitrogen concentration profile, point defects, etc., which mediate the diffusion of impurities are trapped, and consequentially the diffusion of impurities from the regions(14) is suppressed. Therefore, abnormal leakage current, etc., are prevented.
Patent KR-20000016485-A (KR)
Title: Minicell sequence number count
Inventor: PETERSEN LARS-GELAN
IPC: H04L12/56
Filed: 1997-06-03
Abstract: PURPOSE: A detecting process of lost data cells in a telecommunication system is provided to improve an utilization of the bandwidth by using an optional minicell or an ATM cell sequence count. CONSTITUTION: The process of detecting lost data cells in a telecommunication system that employs Asynchronous Transfer Mode (ATM) is significantly improved in terms of bandwidth utilization by using an optional minicell or ATM cell sequence count. This may be accomplished by inserting the minicell or ATM cell sequence count into the ATM cell stream at intervals that can be adjusted at the transmitting station.
Patent KR-20000016590-A (KR)
Title: Optical recording method and optical recorder
Inventor: FURUKAWA SHIGEAKI
IPC: G11B7/125
Filed: 1997-12-17
Abstract: PURPOSE: An optical recorder which has a basic pulse generating unit is disclosed. CONSTITUTION: The optical recorder comprises a basic pulse generating unit (60) which includes a leading end pulse generating circuit (2), a burst gate generating circuit (4) and a trailing end pulse generating circuit (6); a data length detection unit (61) which includes a front mark detection circuit (40), a front space detection circuit (41), a record mark detection circuit (42), a rear space detection circuit (43) and a rear mark detection circuit (44); a timing control unit (62) which includes a leading end pulse selection circuit (14), a leading end starting position setting circuit (15), a leading end pulse delay circuit (19), a trailing end pulse selection circuit (21), a trailing end starting position setting circuit (35) and a trailing end pulse delay circuit (25); a pulse synthesizing unit (63) which includes an AND gate (27) and an OR gate (36); and a laser driving unit (64) which includes an erasing current source (32), a recording current source (33) and a switch (34).
Patent KR-20000051201-A (KR)
Inventor: KIM SANG YEON
IPC: G06T3/00
Filed: 1999-01-19
Abstract: PURPOSE: An apparatus for interpolating image data and a method thereof are provided to use a linear interpolation as well as edge-dependent pixel repetition simultaneously. CONSTITUTION: An apparatus for interpolating image data according to the present invention includes a linear interpolator, an edge calculator(42), and an edge processor. The linear interpolator interpolates linearly the input data. The edge calculator calculates the compared value for edge determination from the input data. The edge processor determines the edge using the result of the edge calculator, and outputs selectively pixel repeated or linearly interpolated data according to the determination result. The edge calculator subtracts the input data from a delayed data. The edge processor further includes a threshold calculator, a selector, and a selection controller.
Patent KR-20000051322-A (KR)
Inventor: YOO SAM JIN
IPC: C10L3/06
Filed: 1999-01-20
Abstract: PURPOSE: A flammable gas producer from heavy oil and waste lubricating oil is provided which has improved combustion efficiency and minimizes discharge of a pollutant by momentary superheat at the liquefied oil to convert flammable gas including ethylene and to produce a carbon particle of high purity. CONSTITUTION: A flammable gas producer includes a gas producing main body(10) for producing gas from source oil such as the heavy oil and the waste lubricating oil, an electrode(20) for dissociating the source oil to hydrogen(g) and carbon(s) by momentary superheat, a cooling and thermal medium cycle part(30) for cycling a cooling medium or a thermal medium to rise the gas produced by the superheat of the electrode(20), a fluid quantity detector(40) for detecting store quantity of the source oil at the inside of the cycle part(30), a first filter(50) for separating and filtering the gas and the solid decomposed by the superheat of the electrode(20) at the upside of the inner gas producing main body(10), a multistage gas filter and safety unit(60) for keeping safety from a contrary fire and filtering the gas filtered at the first filter(50), a source oil tank(70) for supplying the source oil to decompose to the gas producing main body(10) and a source oil supplying unit(80) for filtering, cycling and cooling the source oil supplying to the gas producing main body(10) from the source oil tank(70).
Patent KR-20000051985-A (KR)
Inventor: LEE JAE YONG
IPC: H04L12/24
Filed: 1999-01-28
Abstract: PURPOSE: A combined building management system is provided to build the combined system regardless of kinds of sub systems to reduce maintenance costs, by configuring transmission control protocols/internet protocols(TCPs/IPs) in each sub system as including middleware modules for transmitting data communication and commands in the TCPs/IPs. CONSTITUTION: A combined building management system comprises many sub systems(100-102), a building combined management system(150), and a database server(160). The sub systems control taxes/health, power/illumination, parking, and elevators. The building combined management system receives information of the sub systems through a transmission control protocol/internet protocol(TCP/IP) Ethernet local area network(LAN), and controls the information. The database server stores data transmitted from the sub systems, and transmits the data according to events of the building combined management system. The sub systems include middleware modules for transmitting data communication and commands regardless of converters converting into TCPs/IPs.
Patent KR-20000052119-A (KR)
Inventor: KIM HYEON JUN
IPC: G06F17/30
Filed: 1999-01-29
Abstract: PURPOSE: An image search system according to user authority class is provided to enable more accurate search by using images as a search tool, which will become more personally specified with more use, by updating additional image and providing authority code and reliability code. CONSTITUTION: An image search system according to user authority class is composed of selection, search, comparison, calculation, and supplementation. When reference image is selected, an image that is identical to or similar to the reference image is searched and the result is returned to the user. The user's authority class and the image's authority class is compared. If the user's authority class is lower than the image's authority class, the image's addition renewal request is denied. If the user's authority class allows for correction of the image, the similarities between the reference image and searched image is determined. The addition value between the reference image and searched image is calculated and the user's class is supplemented with the calculated difference.
Patent KR-19990072419-A (KR)
Title: 저탄성우레탄발포체
IPC: C08G18/40
Filed: 1999-02-04
Abstract: 본 발명은 실온에서 우수한 저탄성을 갖고 저온에서조차 경도 증가 억제능을 갖는 저탄성 우레탄 발포체에 관한 것이다.  폴리올(a), 폴리이소시아네이트(b), 촉매(c) 및 발포제(d)를 포함하는 우레탄 발포체 조성물의 반응에 의해 형성된 저탄성 우레탄 발포체는 -70 내지 -20℃의 온도 범위 및 0 내지 60℃의 온도 범위 각각에서 하나 이상의 유리전이점을 갖는다.  유리전이점이 저탄성 우레탄 발포체의 역동적인 점탄성 측정을 주파수 10hz에서 수행할 경우 수득되는 tanδ 피크로서 표현되는 경우, -70 내지 -20℃의 온도 범위에서 tanδ 피크(들) 중의 하나 이상은 0.15 이상이고, 0 내지 60℃의 온도 범위에서 tanδ 피크(들) 중의 하나 이상은 0.3 이상이다.
Patent KR-20000055497-A (KR)
Inventor: LEE JONG HYUN
IPC: H02K5/14
Filed: 1999-02-06
Abstract: PURPOSE: A brush of AC generator for vehicles is provided to prevent short by improving an elastic member elastically supporting the brush inside of a holder. CONSTITUTION: A brush of AC generator for vehicles comprises a stator(20) which produces an output current to the inside of a front bracket(10) and a rear bracket(11), a rotor(30) which rotates in the inside of the stator(20) and produces a output current, a rotor shaft(33) which has the rotor(30) rotate, a voltage regulator(60), a slip ring(40), and an elastic member. The elastic member elastically supports the brush in the direction of lower side, and electrically connects a terminal electrode of the voltage regulator with the brush.
Patent KR-20000056012-A (KR)
Inventor: BYUN JONG WON
IPC: A61B8/00
Filed: 1999-02-12
Abstract: PURPOSE: A portable ultrasonic tester for veterinary activity capable of performing a simple and movable physical activity of an animal is provided. CONSTITUTION: A portable ultrasonic tester for veterinary activity includes an ultrasonic tester(200) and a shoulder holding member. A plurality of ring(212) is formed at the ultrasonic tester(200). The shoulder holding member is connected to the ultrasonic tester(200) serves to perform a function for carrying the ultrasonic tester(200) on one's shoulder. A hook ring member(312) and a shoulder strap(310) are formed at the shoulder holding member. A plurality of connecting band grooves is formed at a back support member(320). The hook ring member(312) is connected to the plurality of ring(212). A belt supports the ultrasonic tester(200) on a waist. A waist support includes connecting bands(452) which are connected to the plurality of connecting band grooves.
Patent KR-19990073054-A (KR)
Title: 합병정화조및기타오폐수처리시스템의반응조배치방법
IPC: C02F3/12
Filed: 1999-02-19
Abstract: 본 발명은 분뇨와 오수등을 발생원에서 처리하는 합병 정화조 및 기타 오폐수 처리시스템의 반응조 배치방법에 관한 것이다. 
     본 발명의 구성은, 내부에 혐기조(A), 무산소조(B), 폭기조(C) 및 침전조(D)등의 반응조를 적절하게 배치하고 활성슬러지 공법을 이용함으로써 분뇨와 오수를 발생원에서 함께 처리하는 합병 정화조 및 기타 오폐수 처리시스템의 반응조 배치방법에 있어서, 상기 혐기조(A)의 분뇨와 오수는 제1격벽에 의해 인접배치된 무산조소(B)로 제1공기부양펌프(P1)를 통해 이송되고, 상기 무산소조(B)의 분뇨와 오수는 제2격벽에 의해 인접배치된 폭기조(C)로 오버플로우되며, 상기 폭기조(C)의 분뇨와 오수는 제3격벽에 의해 인접배치된 침전조(D)로 오버플로우되고, 상기 침전조(D)의 분뇨와 오수는 제4격벽과 제5격벽에 의해 인접배치된 무산소조(B)와 혐기조(A)의 각각으로 공기부양펌프(P2)(P3)를 통해 반송되도록 함을 특징으로 한다. 
     이는 혐기조, 무산소조, 폭기조 및 침전조를 2차원적인 영역에 효과적으로 배치하여 분뇨와 오수등을 이송하고 반송하는 배관의 사용을 최소화함으로써 전체적인 구조를 단순화하고 배관의 막힘현상을 방지할 수 있도록 한다.
Patent KR-20000059644-A (KR)
Inventor: LEE CHANG SEON
IPC: F24F13/00
Filed: 1999-03-05
Abstract: PURPOSE: A two-way discharging air conditioner is provided to convert air discharge direction up and down as desired by using a single fan, thereby improving the convenience of users while reducing manufacturing cost and the whole volume of the air conditioner. CONSTITUTION: A two-way discharging air conditioner includes a suction grill(51) introducing room air, a heat exchanger(52) mounted at a rear surface of the suction grill for cooling air, upper and lower discharge holes(55,54) respectively formed at upper and lower end parts of a case for discharging cooled air, an impeller(56) rotating by a fan motor(57) for introducing room air and discharging cooled air, a scroll(58) mounted around the impeller and having a rotation part rotating for discharging cooled air via either the upper or lower discharge holes and a fixed part formed with discharge holes toward the upper and lower discharge holes, and a scroll rotation element for rotating the rotation part of the scroll.
Patent KR-20000061773-A (KR)
Title: Method for manufacturing semiconductor device
Inventor: KIM BONG HYEON
IPC: H01L21/334
Filed: 1999-03-30
Abstract: PURPOSE: A fabrication method of a semiconductor device is to improve an operation characteristic of MOS transistor by minimizing a threshold voltage variation of PMOS transistor. CONSTITUTION: An N-type well(104) is formed on a P-type semiconductor substrate(100). A gate oxide layer having a thickness of 50 angstroms is grown on the semiconductor substrate by performing an oxidation process. A polycrystalline silicon layer is formed on the gate oxide layer. Germanium ions(110) and nitrogen ions(112) are formed in sequence in the polycrystalline silicon layer by ion implanting on the whole surface of the semiconductor substrate. A rapid thermal annealing process is directed to the polycrystalline silicon layer under a temperature of 900 to 1100 deg. C. A gate pattern(108a,108b) are formed by patterning the polycrystalline silicon layer. The gate pattern acts as a gate electrode of an N-type MOS transistor and a P-type MOSFET. A first photoresist is formed only on the N-type well to be formed with the P-type MOS transistor. An N-type diffusion region(118a) is formed on both sides of the gate pattern by implanting an impurity ion(118) into the gate pattern. The first photoresist is completely removed by an ashing or strip process. A P-type diffusion region(122a) is formed on both sides of the gate pattern by ion implanting a boron ion into the gate pattern.
Patent KR-20000061873-A (KR)
Inventor: KANG DONG UK
IPC: C07D241/00
Filed: 1999-03-31
Abstract: PURPOSE: Provided are novel piperazine derivatives being excellent in anti-cancer activity and having little toxicity. Also, a production method thereof is provided. CONSTITUTION: A piperazine derivative is represented by the general formula 1 wherein: R1 and R2 represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a lower ester group having 1 to 4 carbon atoms, a lower alkylhydroxy group having 1 to 4 carbon atoms, a ketone group, a carboxy group substituted or unsubstituted or R1 and R2 constitute together unsaturated circle having 4 carbon atoms; R3, R4, R5, R6, and R7 represent a hydrogen atom, a halogen atom, a hydroxy group, a nitro group, amino group, a lower alkyl group having 1 to 4 carbon atoms, a lower ester group having 1 to 4 carbon atoms, a lower alkoxy group having 1 to 4 carbon atoms, a lower thioalkoxy group having 1 to 4 carbon atoms; Y represents an amine group, substituted amine group, a lower thioalkyl group having 1 to 4 carbon atoms; and z represents a hydrogen atom, a hydroxy group, a lower alkyl group having 1 to 4 carbon atoms, a lower alkylamine group having 1 to 4 carbon atoms, a lower alkoxy group having 1 to 4 carbon atoms and a lower thioaloxy group having 1 to 4 carbon atoms.