baber/WOPTO huggingface dataset:
Patent KR-20080113872-A (KR)
Title: Method of forming a spacer in semiconductor device
Inventor: YOON JAE SEUK
IPC: H01L21/31
Filed: 2007-06-26
Abstract: The method of forming a spacer of the semiconductor device is provided to prevent the side wall in the etching process of the silicon nitride film by using a high pressure and to lower the selection ratio of the silicon oxide film. The method of forming a spacer of the semiconductor device comprises as follows. A step is for forming the gate electrode(14) on the substrate(10). A step is for forming the silicon oxide film for the spacer and silicon nitride film on the substrate having the gate electrode. A step is for etching the silicon nitride film in the processing condition using the C4F8 gas. A step is for forming spacers(16b, 18b) of the double film in the side wall of the gate electrode by etching the silicon oxide film.
Patent KR-20090000330-A (KR)
Title: Data setting method of non volatile memory device
Inventor: SON JI HYE
IPC: G11C16/10
Filed: 2007-06-28
Abstract: A data setting method of non volatile memory device is provided to reduce a time required for data input without a data input process by setting identically up data of the total page. A data setting method of non volatile memory device is comprised of the steps; inputting a program setup command(510); Inputting the address of the memory cell performing the program operation(520); Inputting a confirmation command without a step for inputting data from outside(530); making the first data setting control signal enabled with the input of the first confirm command; completing data setting in the register of each page buffer according to inputting the first and second command.
Patent KR-20090000908-A (KR)
Title: 사용이 편리한 코튼 펠릿 디스펜서
Inventor: KANG TAE HYUN
IPC: A61C19/02
Filed: 2007-06-29
Abstract: 본 발명은 코튼 펠릿(cotton pellets)의 편리한 사용을 위한 기구로서, 상하로 가변될 수 있도록 장착되어 있는 판재 상에 다수의 코튼 펠릿들(cotton pellets) 이 탑재된 상태에서 내장되어 있고, 상단에는 상기 코튼 펠릿에 대응하는 크기의 개구가 다수 형성되어 있는 망상형 커버가 장착되어 있으며, 하단 중앙부는 상기 판재의 하면이 부분적으로 노출될 수 있도록 관통구가 천공되어 있는 코튼 펠릿 내장 부재; 상기 내장 부재가 상부로부터 장착될 수 있도록 개방된 상부와, 내장 부재의 양측을 지지하는 한 쌍의 대향 측부들을 포함하고 있으며, 내장 부재에 대응하는 형상으로 이루어진 본체; 및 상기 본체에 내장 부재를 장착할 때, 내장 부재의 관통구를 통해 상기 판재를 가압할 수 있도록, 본체의 내면 하단 중심부로부터 상향 돌출되어 있는 기둥형의 가압 부재를 포함하는 것으로 구성되어 있는 코튼 펠릿 디스펜서를 제공한다. 
     	본 발명에 따른 코튼 펠릿 디스펜서는 본체에 형성된 가압 부재가 코튼 펠렛을 밑에서부터 밀어 올려주는 작용을 하는 바, 망상형 커버가 장착된 내장 부재를 살짝 밑으로 밀어주는 간단한 조작에 의해서도 소정 크기의 코튼 펠릿들이 돌출되므로, 다수의 코튼 펠릿을 편리하고 깨끗한 방법으로 사용할 수 있게 한다.
Patent KR-20090001281-A (KR)
Title: System for controlling storage capacity of cold and hot water in cold and hot water dispenser or purifier
Inventor: LEE CHUL KU
IPC: F25D11/00
Filed: 2007-06-29
Abstract: A hot/cold water capacity control system of a hot/cold water purifier and a hot/cold water capacity control method using the same are provided to regulate the hot/cold water capacity depending on user convenience and make and store a desired amount of hot/cold water. A hot/cold water capacity control system of a hot/cold water purifier comprises a partition member(52) in which first and second partition films(52a,52b) dividing the internal space of a cold water tank(50) into three sections are formed, first and second evaporators(30,40) in the middle and bottom sections of the cold water tank partitioned with the partition member, first and second refrigerant valves(60,70) connecting the first and the second evaporator to a condenser(20) and controlling the flow of refrigerant, and a controller(100) controlling the refrigerant valves, a compressor(10) and the condenser.
Patent KR-20080011091-A (KR)
Title: Method of manufacturing semiconductor device
Inventor: MIYAIRI HIDEKAZU
IPC: H01L21/027
Filed: 2007-07-26
Abstract: A method for manufacturing a semiconductor device is provided to form a desired shaped layer on a desired position without using a photolithography process by transferring an optical absorption layer on a substrate. A method for manufacturing a semiconductor device comprises the steps of: forming a light absorption layer on one surface of a first substrate; providing a second substrate on the light absorption layer; providing a mask on another surface of the first substrate; and transferring a part of the light absorption layer on the second substrate by irradiating a laser beam on the light absorption layer passing through the mask.
Patent KR-20090012967-A (KR)
Title: Fragrance function stand
Inventor: CHOI WON SUCK
IPC: F21S13/12
Filed: 2007-07-31
Abstract: A stand having fragrance function capable of strengthening concentration is provided to reduce energy waste by installing separate power source. A stand having fragrance function includes a stand power source(f) and a heater power source(g). The heater generates a heat. An electric heating board delivers a heat generated in the heater. The stand having fragrance function ejects fragrance helping metabolism and concentration. The electric heating board heats raw solution of rosemary added in a lamp.
Patent KR-20090013953-A (KR)
Title: Method and apparatus for allocating peer to peer resource in wireless communication system based on relay
Inventor: YU TAK KI
IPC: H04B7/14
Filed: 2007-08-03
Abstract: A method and an apparatus for allocating P2P(Peer to Peer) resource in a wireless communication system based on relay are provided to perform P2P communication without an additional dedicated P2P resource by sharing a relay line resource based on P2P communication. A P2P controller(514) makes a corresponding configuration unit of physical layer receive the information necessary for processing a P2P communication protocol between terminals, and generates a control signal to the corresponding configuration unit of the physical layer. A P2P resource selection unit(518) considers a resource for the P2P communication to judge whether to use a uplink resource of an access link, a resource relay line or the dedicated resource of P2P in order to allocate the resources for the P2P communication to a P2P connection unit(516). A signal strength measurement unit(520) measures signal strength by using preambles which are respectively received at a base station and a repeater and provides an upper link resource management unit(524), a P2P dedicated resource management unit(526) and the P2P resource selection unit with the measurement result.
Patent KR-20090014629-A (KR)
Title: Surveillance camera system
Inventor: KIM HONG WOO
IPC: H04N7/18
Filed: 2007-08-06
Abstract: A monitoring camera system for controlling the focus of a camera is provided to install a lever driving unit capable of driving a back focal distance control lever by remote control to a camera having the back focal distance control lever in the outside, thereby easily controlling a back focal distance. A back focus distance is controlled by moving a PCB(Printed Circuit Board) in which an image pickup device is mounted. Accordingly, the focus of a camera is controlled. A back focal distance control lever is equipped with the camera to control the back focus distance by moving the PCB forward or backward. A lever driving device(300) is mounted to the camera in order to operate the back focal distance control lever.
Patent KR-20080014952-A (KR)
Title: Method and system for production of glasses, where chemical reduction of components is avoided
Inventor: MICHAEL LEISTER
IPC: C03B5/193
Filed: 2007-08-10
Abstract: A method and a system for manufacturing glasses are provided to reduce or prevent the reduction of reduction-sensitive components of glass during a melting process and a refining process. A method for manufacturing glasses includes a step of introducing an oxidant into a refining container(14) and further a melting crucible(13) during a refining process to reduce or prevent reduction-sensitive components of glass. The oxidant is oxygen and/or ozone. A system for manufacturing glass includes the melting crucible and the refining container. The refining container has a unit for guiding an oxidant, especially oxygen and/or ozone. Further, an index of refraction of the glass is 1.7 or more.
Patent KR-20090016361-A (KR)
Title: System for processing dynamic query using semantic prefetching scheme based on description in location-based services
Inventor: KANG SANG WON
IPC: G06F17/30
Filed: 2007-08-10
Abstract: A system for processing dynamic query using semantic pre-fetching scheme based on description in position-based services is provided to obtain a query result from a cache of a mobile client by using a semantic pre-fetching method in mobile computing environment using a restrictive bandwidth. A log storage(202) stores a log file received from a mobile client(220). A log analyzer(204) analyzes the log file. A pre-fetching manager(206) determines a pre-fetching description delivered to the mobile client. A query generator(222) generates a range query and a nearest neighbor query. A cache storage(224) stores cached information, and renews a description table according to a predetermined cache replacement strategy. A query analyzer(226) analyzes a kind of the query. A cache manager(228) retransmits a rest query different from a content of a cache stored in the cache storage to a server(200). When the mobile client enters a semantic pre-fetching area supporting high speed data transmission, the mobile client obtains semantic information about position dependent data from the server.
Patent KR-20090017111-A (KR)
Title: 반도체 소자의 게이트 패턴 형성 방법
Inventor: KIM EUN MI
IPC: H01L29/78
Filed: 2007-08-14
Abstract: 본 발명은 반도체 소자의 게이트 패턴 형성 방법에 관한 것으로, 본 발명의 반도체 소자의 게이트 패턴 형성 방법은, 반도체 기판 상에 게이트 절연막, 제1 도전막 및 제2 도전막을 형성하는 단계; 상기 제2 도전막 상에 게이트 패터닝을 위한 게이트 하드마스크 패턴을 형성하는 단계; 상기 게이트 하드마스크 패턴을 식각 베리어로 상기 제2 도전막 및 상기 제1 도전막을 식각하되, 상기 제1 도전막의 일부 두께를 잔류시키는 1차 게이트 식각 단계; 결과물에 대해 플라즈마 질화처리를 수행하여 상기 제1 도전막, 상기 제2 도전막 및 상기 게이트 하드마스크 패턴의 양측벽에 질화막을 형성하는 단계; 및 잔류하는 상기 제1 도전막 및 상기 게이트 절연막을 식각하는 2차 게이트 식각 단계를 포함하고, 여기서, 상기 1차 게이트 식각 단계와 상기 플라즈마 질화처리는 동일 챔버 내에서 인시튜로 수행되고, 상술한 본 발명에 의한 반도체 소자의 게이트 패턴 형성 방법은, 종래의 l차 게이트 식각, 캡핑 절연막 형성, 2차 게이트 식각 및 게이트 재산화로 이루어지는 일련의 게이트 패턴 형성 과정을 동일 챔버내에서 인시튜(insitu)로 수행하고, 특히 캡핑 절연막 형성 및 게이트 재산화 공정을 플라즈마 처리 공정으로 대체함으로써 공정의 단순화, TAT(Turn Around Time) 개선 및 비용 절감이 가능하다. 
       
     게이트 패턴, 플라즈마 질화처리, 플라즈마 산화처리, 인시튜
Patent KR-20080018114-A (KR)
Title: Method of machining crankshaft, device of machining crankshaft, control device and program
Inventor: SUZUKI TAKESHI
IPC: B23Q15/04
Filed: 2007-08-20
Abstract: A method for machining a crank shaft, a machine for a crank shaft, a device and a program for controlling the same are provided to improve the accuracy of straightness of the journal thrust surface. A method for machining a crank shaft comprises the steps: making a straightness compensating data by comparing size of a journal thrust surface after machining process to aiming machining size(M6); compensating the machining data on the basis of straightness compensating data(M7); and controlling a rotary cutter on the basis of machining process after compensating the machining data(M8).
Patent KR-20090021787-A (KR)
Title: Elongate fabric and a method of preparing the same using continuous dyeing process
Inventor: KIM DUK YONG
IPC: D03D15/56
Filed: 2007-08-28
Abstract: Elastic fabric using a continuous dyeing process and a manufacturing method thereof are provided to maintain shape stability and remarkable intensity without decreasing of elasticity in high temperature under a dye process. A method for manufacturing elastic fabric using a continuous dyeing process comprises a step(S100) for manufacturing a based material by weaving a stretched potential crimped yarn to be used as a warp or weft and a step(S200) for performing a dye process. The potential crimped yarn is manufactured by a direct spinning and a drawing method or by using a drop wire device with a partially oriented yarn.
Patent KR-20090022628-A (KR)
Title: Vibration sensoring-based mode conversion method and terminal apparatus applied to the same
Inventor: UM BONG SU
IPC: H04B1/40
Filed: 2007-08-31
Abstract: A mode conversion method based on vibration sensing and a terminal apparatus using the same are provided to convert the current mode of the terminal into a mute mode or vibration mode depending on the degree of vibration which a user makes on the terminal or the cycle at which the user forms the vibration. A vibration recognition mode for performing the terminal control is set through the vibration which is generated by the knocking operation of a user(S100). If the vibration from the outside is sensed(S102), the sensed vibratory signal is compared with a pre-stored level signal(S104). A specific execution mode is operated according to the determined result by matching one of the strength of the sensed vibration signal and the time interval with the level signal(S106, S108, S110).
Patent KR-20090022705-A (KR)
Title: Antenna formed on board
Inventor: YOON JOONG HAN
IPC: H01Q1/24
Filed: 2007-08-31
Abstract: An antenna capable of receiving signal of low frequency band without separate space is provided to improve resonance property bi controlling impedance property and reflection loss property according to frequency signals. An antenna comprises a substrate(11), a first conductive pattern(12), a conductive via hole(13), a second conductive pattern(14), and two or more stubs(15). The first conductive pattern is formed on one side(11a) of the substrate, and has a predetermined electrical length. One end of the first conductive pattern is connected to a feed unit(F). The conductive via hole is connected to the other end of the first conductive pattern. The second conductive pattern is formed on the other side(11b) of the substrate, and is connected to the conductive via hole. At least two or more stubs are extended from the second conductive pattern, and are separated each other.
Patent KR-20090033702-A (KR)
Title: Apparatus and method for detecting signal in communication system using multiple antennas
Inventor: CHOI SEUNG HOON
IPC: H04B7/04
Filed: 2007-10-01
Abstract: An apparatus and a method for detecting a signal in a communication system using multiple antennas are provided to successfully remove interference in other branches even though removing interference is failed in one branch, thereby improving the entire performance. A signal sequence that a user wants to detect is determined in consideration of a channel state. A signal is detected according to the determined signal sequence(102). And a final detection signal is regarded as a first detection signal, a signal is reversely detected(104,106). A signal is detected in a sequence reverse to the determined signal sequence(112). And the final detection signal is regarded as the first detection signal, a signal is reversed detected(114,116). The final detection signal is detected by comparing a noise variance value of the detection signal(120,122,124).
Patent KR-20090035224-A (KR)
Inventor: KWON SE JIN
IPC: G06F1/16
Filed: 2007-10-05
Abstract: 본 발명은 디스플레이장치용 스탠드에 관한 것이다. 더욱 상세하게는, 수평조절기능을 갖는 디스플레이장치용 스탠드에 관한 것이다. 
     본 발명에 따른 디스플레이장치용 스탠드는 그 베이스 하면에, 회전가능하게 장착되며, 상기 베이스에 장착되는 회전축과 선택적으로 회전을 방지하는 회전방지수단이 구비된 편심휠을 포함한다. 
     본 발명에 따른 디스플레이장치용 스탠드 베이스 하면에 장착된 편심휠은 회전시 가변적인 반경을 가지므로, 각각의 위치에서의 높이차를 보상하여, 스탠드 베이스의 수평도를 신뢰성 있게 보장할 수 있다. 
       
     평판, 디스플레이장치, 편심휠, 고정핀, 고정홈
Patent KR-20090036920-A (KR)
Title: Display substrate, display device and driving method of the same
Inventor: JUNG MEE HYE
IPC: G02F1/1343
Filed: 2007-10-10
Abstract: A display substrate, a display device having the same and a driving method thereof are provided to secure the wide viewing angle without forming a cleaved part or a protrusion in a common electrode. A pixel electrode(191) has the first cleaved part(91) and the second cleaved part(92) and is overlapped with the first storage electrode and the second storage electrode. A direction control electrode(176) is positioned within the first and second cleaved parts and is overlapped with an upper part of the second storage electrode. To form electric fields(13,14) which generate a plurality of domains, direction control electrodes are alternatively arranged. The voltage difference between the direction control electrode and a common electrode(270) is bigger than that between the pixel electrode and common electrode.
Patent KR-20090038178-A (KR)
Title: Short axial length shaft typed motor assembly
Inventor: LEE JU MIN
IPC: B62D6/00
Filed: 2007-10-15
Abstract: A short motor shaft type motor assay is provided to reduce the occupation space of the coupling and the sensor by making the sensor part and the coupling into one body. A short motor shaft type motor assay comprises a motor shaft(6) protruded from a motor housing(2), a motor cover housing(11) combined with the motor housing, a sealing housing(12) inserted in a sensor receiving part(11c) of the motor cover housing, a coupling(13) which is connected to the end of the motor shaft via a shaft coupling boss(13a) and delivers the motor output torque to outside, and a sensor(14) measuring the rotation position of the motor shaft. The sensor includes a yoke(15) concentric with and having a larger diameter than the shaft coupling boss of the coupling, a ring magnet(16) adhering close to the yoke, and a PCB(Printed Circuit Board,17) provided on the sensor receiving end apart from the ring magnet.
Patent KR-20080035484-A (KR)
Title: Photoelectric coupling assembly and manufacturing method thereof
Inventor: SAKURAI WATARU
IPC: G02B6/42
Filed: 2007-10-18
Abstract: A photoelectric coupling assembly and a manufacturing method thereof are provided to prevent a lead from being detached from a front portion of a forming member by inserting at least a portion of an engaging unit into a resin. A photoelectric coupling assembly includes a photoelectric conversion unit(40) and a forming member(20). The photoelectric conversion unit includes a photoelectric converter. The forming member includes an optical fiber insertion hole and a front surface. An optical fiber is inserted into the optical fiber insertion hole. An end of the optical fiber is arranged to face an active layer of the photoelectric converter. The photoelectric conversion unit is mounted on the front surface of the forming member, to which a lead is inserted. The lead includes first and second surfaces and an engaging portion. The first surface is exposed from the front surface and electrically connected to the photoelectric converter. The second surface is exposed from a side surface of the forming member. A width of the engaging portion gets wider away from the front surface. At least a portion of the engaging portion is inserted into a resin, which constitutes the forming member.
Patent KR-20090041460-A (KR)
Title: Bogie supporting device of diversification
Inventor: KIM CHEAL
IPC: B66C19/00
Filed: 2007-10-24
Abstract: A bogie supporting apparatus is provided to reduce installation time of the supporting apparatus and improve work efficiency and reduce installation cost by composing an adjusting element of a main base, an angle supporting the main base, a support beam and a prop beam. A supporting apparatus of a bogie(1) which is a substructure of a gantry crane comprises: a main base(2) having a beam shape; an angle(6) vertically coupled with the main base both sides; and an adjusting element(4) being formed in the upper part of the main base. The adjusting element supports the both sides of the bogie. The main base comprises: a body(12) in which a beam groove is formed on the top; and a coupling member(15) formed in the body both sides.
Patent KR-20090042003-A (KR)
Title: Method and apparatus for measuring specific environment by coordinating wireless local communication module and sensor
Inventor: KIM JEONG DEOK
IPC: H04L12/26
Filed: 2007-10-25
Abstract: A method and an apparatus for measuring specific environment by matching a wireless local communication module with a sensor are provided to set a power consumption application signal, a sensor interrupt signal or a measurement item designation signal through a sensor module or the wireless local communication module. A sensor module(320) measures information about specific environment. According to the set first cycle, the sensor module transmits a communication power application signal. According to the set first cycle, the sensor module transmits a communication interrupt signal. A wireless local communication module(310) operates with an external control apparatus. The wireless local communication module receives a specific environmental measurement request signal from the external control apparatus. According to the set second cycle, the wireless local communication module transmits a sensor power application signal to the sensor module. According to the set second cycle, the wireless local communication module transmits a sensor interrupt signal to the sensor module. After a measurement item designation signal is transmitted to the sensor module, the wireless local communication module transmits the specific environment measurement data to the external control apparatus.
Patent KR-20090044577-A (KR)
Inventor: YI JAE YUN
IPC: H01L21/8247
Filed: 2007-10-31
Abstract: 본 발명은 비휘발성 반도체 소자 및 그 제조 방법에 관한 것으로, 특히 나노 플로팅 게이트 메모리(Nano floating gate memory)를 포함한 비휘발성 반도체 소자에 일정 간격으로 교번하는 골과 마루 프로파일을 구비한 터널 절연막을 포함하도록 설계함으로써, 비휘발성 반도체 소자의 공정을 단순화하고, 소자의 특성을 향상시킬 수 있는 기술이다.
Patent KR-20090047105-A (KR)
Title: 램프 고정용 가이드와 이를 이용한 백 라이트 유닛 및 액정표시장치
Inventor: YANG SHIN WOO
IPC: G02F1/13357
Filed: 2007-11-07
Abstract: 본 발명은 램프 고정용 가이드와 확산판의 손상을 방지하고 빛샘 및 암점에 의한 불량이 발생하지 않도록 램프를 고정시킬 수 있는 램프 고정용 가이드와 이를 이용한 백 라이트 유닛 및 액정 표시장치에 관한 것이다.  
     이를 위해, 본 발명의 램프 고정용 가이드는 램프를 거치시킬 수 있도록 홈이 형성되어 집게 형태를 갖는 적어도 하나의 고리; 상기 각 고리의 높이를 조절하기 위해 상기 각 고리에 대응되도록 형성된 적어도 하나의 고리 핀; 상기 각 고리 핀을 지지함으로써 상기 각 고리를 고정하기 위한 고리 지지부; 상기 고리 지지부를 바닥에 고정시키기 위한 적어도 하나의 홀더; 및 확산판의 처짐을 방지하기 위해 상기 고리 지지부 상에 원뿔형상으로 형성되며 상기 확산판과 접촉되는 꼭지점이 수직 및 수평 방향으로 유동 가능하도록 형성된 적어도 하나의 돌기를 구비한 것을 특징으로 한다.  
       
     램프 고정용 가이드, 고리부, 홀더부, 스프링
Patent KR-20090004340-A (KR)
Title: Electronic money system
Inventor: KOMASAKA TOSHIO
IPC: G06Q50/00
Filed: 2007-11-12
Abstract: An electronic money system is provided to reduce transaction time and to solve a troublesome task for a user because a user does not need to select a using card. An electronic money system comprises a electronic money terminal device(2) and a contactless IC card management server(5) managing a contactless IC card which issues from the registered company in advance regardless of a publishing company and a electronic money managing company. An electronic money terminal device(2), a A3 and a B4 of the electronic money managing company, and a managing server connects with each network(6).
Patent KR-20090051409-A (KR)
Title: 파라솔 지주의 각도 조절 장치
Inventor: WOO JOON SIK
IPC: A45B25/02
Filed: 2007-11-19
Abstract: 본 발명은, 상부 지주의 하측 단부에 고정 삽입되고, 하측으로 삽입돌기가 연장 형성되며, 삽입돌기의 일측 하단부에 경사면이 형성되는 상부 캡; 하부 지주의 상측 단부에 고정 삽입되고, 상측 중심부에 상기 삽입돌기가 회동 가능하게 삽입되는 삽입홈이 오목하게 형성되는 하부 캡; 하부 캡의 외주면을 감싸는 커버; 커버의 하측 단부를 탄력 지지하는 스프링을 포함하는 것을 특징으로 하는 파라솔 지주의 각도 조절 장치에 관한 것으로서, 
     이러한 본 발명에 의하면, 커버를 내리는 간단한 동작을 통해 파라솔 지주의 회전을 쉽게 조작할 수 있고, 커버가 스프링에 의해 탄력 지지되므로 파라솔 지주의 고정이 임의로 해제될 염려가 없다.
Patent KR-20090052521-A (KR)
Inventor: JEON HYE SUNG
IPC: G01N33/533
Filed: 2007-11-21
Abstract: 본 발명은 HBV(Hepatitis B Virus) 증식에 필요한 캡시드 단백질과 표면 단백질 간 상호작용(결합도)을 세포 영상으로 측정하여 HBV의 증식 억제물질을 검색하는 방법으로, 구체적으로 HBV의 표면 단백질의 PreS 부위와 세포막 표적화 기능의 PH(Pleckstrin homology) 도메인의 서열을 포함하는 융합단백질, 상기 융합단백질과 상호작용하는 캡시드 단백질과 형광단백질(GFP)을 포함하는 융합단백질 간의 상호작용에 의하여 세포 영상의 변화를 측정하는 방법에 관한 것이다.  본 발명의 HBV 증식에 필요한 단백질 간의 상호작용을 세포 수준에서 검색하는 방법을 이용하여 새로운 HBV의 증식 억제물질을 세포 수준에서 검색하는데 유용하게 이용될 수 있다. 
       
     HBV, 세포 영상, 단백질 상호작용, 검색방법, 증식 억제물질