baber/WOPTO huggingface dataset:
Patent KR-20080110420-A (KR)
Title: Composition of heat-curable bisphenol f type epoxy powder coating
Inventor: LEE DAE EUN
IPC: C09D5/03
Filed: 2007-06-15
Abstract: A bisphenol F type epoxy powder coating composition is provided to be usable as a drinking water pipe by using a bisphenol F type epoxy resin which does not eject the materials harmful to the human body. A bisphenol F type epoxy powder coating composition comprises 100 parts by weight of a bisphenol F type epoxy resin having an epoxy equivalent is 600 - 2000 g / eq; 5 - 60 parts by weight of an epoxy hardener having an epoxy equivalent is 30 - 700 g / eq; 0.1 - 5 parts by weight of a curing accelerator; and 5 - 60 parts by weight of a coloring pigment. The epoxy hardener is selected from a group consisting of a dicyanodiamide-based epoxy hardener, imidazole-based epoxy hardener, acid anhydride-based epoxy hardener, phenolic epoxy hardener and their mixture.
Patent KR-20090002223-A (KR)
Title: Iptv setup box with channel allocated to broadcasting or web page according to the digit of the channel number, and the method thereof
Inventor: JO YONG HUN
IPC: H04N21/432
Filed: 2007-06-22
Abstract: An apparatus and a method for assigning web pages to channels by using digits of channel numbers in an Internet protocol television system are provided to determine a channel type by using only digits of a channel so as to easily set a channel. An apparatus for assigning web pages to channels by using digits of channel numbers in an Internet protocol television system includes a channel list having channel information composed of a channel number and a channel reference position in which an address for accessing a corresponding channel is stored, and a processor which receives a channel number from a user, detects whether a channel corresponding to the channel number is a broadcasting channel or a web page, accesses a broadcasting server(120) corresponding to the channel reference position stored in the channel list and displays a broadcasting program transmitted from the broadcasting server through a display unit(140) when the corresponding channel is the broadcasting channel, searches the channel list, downloads a web page corresponding to the channel reference position referred to by the corresponding channel number and displays the web page through a web browser when the corresponding channel is the web page.
Patent KR-20090002410-A (KR)
Title: Anode active material available for improving efficiency of electrode
Inventor: LEE EUN JU
IPC: H01M4/36
Filed: 2007-06-28
Abstract: An anode active material is provided to maximize the efficiency and capacity of an electrode active material and to reduce the manufacturing costs by minimizing the waste of material. An anode active material includes the first active material component, and the second active material component causing the irreversible reaction in the operating potential of the first active material component, wherein the second active material component make the operational efficiency of the first active material component have uniform level.
Patent KR-20090004104-A (KR)
Title: Organic light emitting display and driving method of the same
Inventor: HWANG KWANG JO
IPC: G09G3/30
Filed: 2007-07-06
Abstract: An organic light emitting display and driving method of the same is provided to solve the brightness of the organic light emitting diode due current reduction by the variation of thread voltage of a driving transistor by improving the structure of a sub-pixel. An organic light emitting display and driving method of the same is comprised of the steps: initializing of turning a second transistor and then turning on the first transistor; detecting whether the first transistor is turned off or not while the second transistor is turned on; writing a data into a fist and second capacitor by turning off the second transistor and then turning on the first transistor; turning on a third and a fourth transistor by a voltage data stored in the first and the second capacitor, and then radiating an organic light emitting diode.
Patent KR-20090010495-A (KR)
Title: Steel strip winding device
Inventor: SHIN JAE SUK
IPC: B65H81/00
Filed: 2007-07-23
Abstract: A strip winding apparatus is provided to reduce faults of a strip and produce a product of high quality by sensing minute tension changes at both side ends of a paper tension roll and finely controlling the minute tension changes. In a strip winding apparatus comprising a tension reel winding and coiling a strip and paper, and a paper coil reel installed above the tension reel to provide the paper to the tension reel, the strip winding apparatus further comprises a paper tension roll(10), a pair of guide block parts(20), a pair of guide plate parts(30), a pair of driving parts(40), a pair of sensing parts(50), and a control part(60). The paper tension roll is installed between the paper coil reel and tension reel. The paper tension roll provides tension to the paper. The guide block parts are installed on both side ends of the paper tension roll. The guide block parts are integrally lifted or lowered with the paper tension roll. The guide plate parts guide lifting or lowering of the guide block parts. The driving parts lift or lower the guide block parts respectively. The sensing parts sense lifting and lowering values of the guide block parts respectively. The control part control the respective driving parts using values sensed in the sensing parts.
Patent KR-20090012427-A (KR)
Title: Method for protecting slots and expecting performance measures in unslotted csma/ca network
Inventor: CHOI BONG DAE
IPC: H04L1/16
Filed: 2007-07-30
Abstract: A method for protecting ACK and a method for estimating performance measurement in an unslotted CSMA/CA network are provided to implement the optimum network environment by preventing the collision between respective devices and estimating a lifespan of a battery. A CCA(Clear Channel Assessment) running time is generated by a passion process having the packet with lambda rate used in a network structure designing the CCA running time of the device longer than the conversion time from data reception to the ACK transmission. A packet transmission success probability, a backoff time period, and a packet loss probability are calculated after the device performs the CCA. The number of devices(11,12) comprising the optimum network is calculated by considering the packet transmission success probability, the backoff time period, and the packet loss probability.
Patent KR-20090013295-A (KR)
Inventor: CHOI HAE YONG
IPC: A47J37/06
Filed: 2007-08-01
Abstract: A multi-layered roasting plate is provided to prevent sudden transmission of heat and improve corrosion resistance with ceramic coating on a bottom surface contacting heating source. A multi-layered roasting plate comprises a copper plate and an aluminum plate(2) formed in a sphere shape with constant curvature, an air layer between the upper aluminum plate and the lower aluminum plate having the smaller curvature than the one of upper aluminum plate, a ceramic coating layer in a lower surface of the plate, a silver-plated layer(6) in a upper side of the plate and a plurality of latches(7) installed in around of the upper aluminum plate edge at regular intervals.
Patent KR-20080050273-A (KR)
Title: Method for processing open asynchronous application service event and the open web service gateway which it embodies
Inventor: CHUNG KI SOOK
IPC: H04L12/28
Filed: 2007-08-16
Abstract: A method for processing an open asynchronous application service event and an open Web service gateway implementing the same are provided to facilitate changing of a dynamic event notification policy by determining a priority level for an event notification based on a policy set by an operator. A plurality of SCFs(Service Capability Features) receive an event registration request from an application service by interworking with the application service through a Web service interface, and notify the application service about an event generated in a network. If an event requested to be registered by the application service is an asynchronous event, an event broker(130) registers the event for each SCF based on a pre-set policy. When an event occurs in the network, the event broker notifies the SCFs according to registered priority levels with respect to the event. In registering the event, if registration information of the same event as that requested to be registered already exists so collision according to event registration is predicted, an event registration priority level is determined based on a policy corresponding to the case of predicted collision, according to which the event is registered. A policy DB(Database)(150) stores and manages policy data an operator inputs through a gateway OAM processor(170).
Patent KR-20090019138-A (KR)
Title: Method and apparatus for downloading of content interlock between dynamic platform in a mobile communication system
Inventor: KIM HEUNG SU
IPC: H04W8/24
Filed: 2007-08-20
Abstract: A method and an apparatus for downloading of contents interlocked with a dynamic platform in a mobile communication system are provided to perform platform upgrade first and download contents to be previously downloaded after the platform upgrade automatically when a platform version of a mobile communication terminal is lower. A minimum operable platform version about contents to be downloaded is checked(316). When the minimum operable platform version is lower than a platform version to be operated, contents download is stopped and contents download information is stored. Platform upgrade is requested to a device management server of a mobile communication network(320). A dynamic system library(DSL) data which needs upgrade from the mobile communication network is received in response to the request(322). The upgrade of platform is performed by the DSL data(324). Download reattempt is performed by using stored contents download information(326).
Patent KR-20090024517-A (KR)
Title: He gas injector and low temperature semiconductor device measurement probe thereof
Inventor: HWANG SUNG WOO
IPC: H01L21/66
Filed: 2007-09-04
Abstract: A vacuum gas helium injector and low temperature semiconductor device measurement probe using the same are provided to accurately control the amount of the gas helium and to prevent the existence of the foreign material except the gas helium in the probe. The gaseous helium is supplied in the helium offer member(110). The piston member(120) controls the amount of the helium which is connected to the helium implantation part. The helium injection member(130) injects helium to the probe to insert the piston member. The first connector(121) is combined with the helium supplying member. The helium movable part(122) is combined with the first connector. The first one-way valve(123) is connected to the helium movable part. The gas is passed through the side.
Patent KR-20090024529-A (KR)
Title: Apparatus and method for fast wafer thinning
Inventor: LEE NAE EUNG
IPC: H01L21/3065
Filed: 2007-09-04
Abstract: A high speed thinning apparatus and method of substrate are provided to inject the remote plasma and direct plasma within the chamber at the same time and to increase the lamination speed of substrate. The chamber(90) comprises the substrate in the internal space. The first, the second and third gas supply paths(10,20,30) selectively supply the first, the second and the third process gas within the chamber. The first remote plasma generator(60) is installed on the first gas supply path. The first process gas generates the first radical. The first radical is injected within the chamber. The second remote plasma generator(70) is installed on the second gas supply path. The first process gas generates the second radical. The second radical is injected within the chamber.
Patent KR-20090026613-A (KR)
Title: Heat sink used semiconductor module
Inventor: LEE DAE WOONG
IPC: H01L23/36
Filed: 2007-09-10
Abstract: A heat sink used semiconductor module is provided to attach a semiconductor module without deformation of the semiconductor module by using ferromagnetic member formed on the inside of a heat sink. A heat sink(220) for the semiconductor module is composed of a first board (220a) and a second board(220b). The first board and the second board are arranged on one side of the semiconductor module(250). At the edge of the side facing with each other, the ferromagnetic material(205) for the mutual bond is included. The outer surface of the first and the second board is formed as concavo-convex. The ferromagnetic member is compound of one of alnico, samarium and neodymium.
Patent KR-20090026664-A (KR)
Title: Skutterudite thermoelectric material and method for manufacturing the same
Inventor: UR SOON CHUL
IPC: H01L35/14
Filed: 2007-09-10
Abstract: A skutterudite thermoelectric material and method for manufacturing the same is provided to realize excellent thermal conduction characteristic by making indium filled into an aperture of an inner lattice. A skutterudite thermoelectric material and method for manufacturing the same is comprised of the steps: Inserting cobalt, an antimony, and indium into the quartz tube and making it air-tight; Heating the inserted material by high frequency induction electricity and melting it; performing a vacuum heat treatment to make the raw material uniform and fill indium into the aperture.
Patent KR-20090030379-A (KR)
Title: A pallet for packing corner join a connector
Inventor: PARK GYO HUN
IPC: B65D19/02
Filed: 2007-09-20
Abstract: A corner connecting structure for a product packing pallet is provided to facilitate an assembly process and improve durability and intensity of the product packing pallet. A corner connecting structure for a product packing pallet comprises a front-rear frame(14), a left-right frame(15), and a connector(20). The front-rear frame is composed of a pair of front-rear plates(12) and the left-right frame is composed of a pair of left-right plates(13). The front-rear plates and left-right plates are installed at upper edges in a vertical direction. Joining holes(16) are located in the upper edges of corners of the front-rear frame and left-right frame. A fixing rod(22) is inserted into the joining holes to assemble the front-rear frame and left-right frame together.
Patent KR-20090030877-A (KR)
Title: 이중사출 성형에 의한 드라이버 및 손잡이 제조방법
Inventor: KI JONG SOO
IPC: B29C45/16
Filed: 2007-09-21
Abstract: 본 발명은 이중사출 성형에 의한 드라이버 및 드라이버 손잡이 제조방법에 관련된 사항으로서 기존의 서로 다른 플라스틱재질을 각각의 설비에서 1차,2차로 나누어 사출성형함에 있어서 문제되는 이종재질의 접착력 문제 및 2대의 설비에서 진행되어 발생되는 생산성 저하문제를 해결함과 동시에 특히 기존의 생산방식을 개선하여 금형에서 제품 미분리한 동시성형 방법은 서로다른 다양한 플라스틱재질의 접착력 문제를 해소시켜 수공구의 필수요건인 그립감 개선에 효과가 탁월한, 다양한 소재를 적용할수 있도록 한것이다. 
     
     드라이버 손잡이 경질재, 드라이버그립부 연질재, 드라이버 비트홀더, 드라이버 비트
Patent KR-20090033944-A (KR)
Title: Rpas warning system using bcm buzzer and method thereof
Inventor: KIM SIN GU
IPC: B60R1/00
Filed: 2007-10-02
Abstract: An RPAS(Rear Parking Aids System) warning system and method are provided to use a built-in BCM(Body Control Module) buzzer in common without an RPAS buzzer for rear warning, thereby reducing the production cost and improving workability. An RPAS warning system comprises: an RPAS sensor(10) which is mounted on the back of a vehicle and senses the proximity of an obstacle; an RPAS controller(20) which receives the sensing signal form the RPAS sensor, compares with the set condition, and outputs warning signal; a gearshift R switch(40) which is mounted on a transmission and outputs ON signal when a gearshift is positioned in R; and a BCM(30) which outputs an alarm of RPAS warning frequency through a built-in buzzer when the RPAS warning signal is inputted from the RPAS controller.
Patent KR-20090035377-A (KR)
Title: Door closer
Inventor: KIM BUM JUNE
IPC: E05F3/20
Filed: 2007-10-05
Abstract: A door closer is provided to control the opening/closing speed of a door using the floor hinge of the door and to facilitate the opening/closing of the door. A door closer(10) comprises a main body(14) in which a first cylinder(11) and second cylinders(12) adjacent to the first cylinder are formed, a slider(21) having a hollow and installed in the first cylinder to move up and down, a piston(23) having a rod(22) and installed in the second cylinder to move up and down, a hinge shaft(110) which is inserted into the hollow of the slider and pivotally installed on a cover member(15) installed at the main body, a connector(30) connecting the end of the piston rod and the slider, a spring(42) which is supported in the rod of the piston and installed between the piston and a sealing member(41) installed in the main body in order to elastically bias the piston downward, a slider transfer device(50) which is installed on the hinge shaft and the slider and transfers the slider by the rotation of the rotation axis according to the opening/closing of a door, and a speed control device(60) controlling the lifting speed of the slider by regulating the flow of fluid filled in the first and second cylinders.
Patent KR-20090038976-A (KR)
Inventor: KIM JUN SU
IPC: G01T1/02
Filed: 2007-10-17
Abstract: 본 발명은 방사능 오염도 및 선량율 일체형 측정기에 관한 것으로, 그 목적은 원자력발전소의 작업현상에서 현장의 방사능 오염도 및 선량율을 측정시 하나의 측정기만으로 방사능 오염도와 선량율을 간편하고 신속하게 측정할 수 있도록 함으로서 장비 휴대를 최소화시켜 작업자의 이동을 용이하게 하고, 측정기를 손으로 든 상태에서 간편하게 오염도 및 선량율을 측정할 수 있어 측정기 외관오염을 방지하과 동시에 작업효율도 크게 향상시킬 수 있는 방사능 오염도 및 선량율 일체형 측정기를 제공하는 것이며, 그 목적은 방사능 오염도 및 선량율을 측정하는 측정기에 있어서, 상기 측정기는 배면부에 설치되는 오염도검출기와; 케이블 연결구에 착탈가능하게 연결되는 선량율 검출기와; 상기 오염도 검출기 및 선량율 검출기 중 어느 하나을 선택적으로 연결하는 전환스위치를 포함하는 것을 특징으로 한다. 
     
     방사능, 폐필터, 장기저장, 스프라켓, 이송체인
Patent KR-20090040635-A (KR)
Title: Cure-process for semiconductor chip-bonding and cure-oven apparatus therof
Inventor: LEE SUNG BUEM
IPC: H01L21/60
Filed: 2007-10-22
Abstract: A curing process of a semiconductor chip bonding and a cure oven apparatus therefor are provided to supplement a heating delay of a lead frame due to a convective heat by heating the lead frame through a conductive heat. A lead frame magazine(12) receives a lead frame(10) with a chip and contacts the lead frame physically. The lead frame magazine is made of a heat conductor for heating the contacted lead frame by the conductive heat. A heating plate(16) is installed in a chamber(14) of a cure oven providing a process space to input the lead frame magazine for performing a chip bonding curing by the hot air. The heating plate or lead frame magazine is made of copper or aluminum. The lead frame magazine is contacted with the heating plate through a conduction extending surface to extend the heat contact surface in order to increase the transmission heat quantity.
Patent KR-20090042014-A (KR)
Title: A baffle implements reducing blowout for a vehicle's engine
Inventor: CHO SUNG MOON
IPC: F01M11/08
Filed: 2007-10-25
Abstract: A blowout reducing baffle tool of the automotive engine is provided to reduce the blowout amount of the engine by setting up the vacuum pump oil spout unit guide. A blowout reducing baffle tool of the automotive engine comprises a head cover(10) which has a vacuum pump mounting unit(14) and a blowby discharge port(11). The head cover includes a pair of oil drain members which are formed in the inside upper end, a blowby and an oil droplet inlet port which are formed behind the one side of inside top, and a vacuum pump oil spout section guide which is prepared in front of inside upper end.
Patent KR-20090042428-A (KR)
Title: 반도체 소자의 증착 장치 및 반도체 소자의 제조 방법
Inventor: KIM JAE WOON
IPC: H01L21/76
Filed: 2007-10-26
Abstract: 본 발명은 반도체 소자의 증착 장치 및 이를 이용한 반도체 소자의 제조 방법에 관한 것으로, 반도체 기판 상에 하드 마스크막 패턴을 형성하는 단계와, 상기 하드 마스크막 패턴 및 상기 반도체 기판의 소자 분리 영역을 식각하여 트렌치를 형성하는 단계와, 상기 트렌치를 포함한 전체 구조 상에 절연막을 형성하는 단계와, 진동 처리 공정을 실시하여 상기 절연막 내의 보이드 및 심을 제거하는 단계, 및 상기 하드 마스크막 패턴의 상부가 노출되도록 평탄화 공정을 실시하여 소자 분리막을 형성하는 단계를 포함한다. 
       
     보이드, STI, 초음파, 진동
Patent KR-20090044031-A (KR)
Inventor: KIM IN KWON
IPC: H04N19/124
Filed: 2007-10-31
Abstract: 본 발명은 영상 부호화기의 비트율 제어 장치 및 이를 이용한 비트율 제어 방법에 관한 것이다. 
     본 발명에 따른 비트율 제어 장치 및 비트율 제어 방법에 의하면, 망을 통해 서비스되는 영상에 대하여 양자화 계수(Qc)를 1차적으로 결정한 뒤, 상기 영상 특성에 따라 양자화 계수를 실험을 통해 얻어진 최적의 상한값(T high ), 하한값(T low ), 또는 상수(k)를 고려하여 재조정함을 특징으로 한다.  
     즉, 상기 1차적으로 결정된 양자화 계수(Qc)가 ① 상한값 이상이면 양자화 계수를 상한값으로 재조정하고(Qc>T high 이면 Qc｀=Qc(T high )), ② 하한값 이하이면 양자화 계수를 하한값으로 재조정하고(Qc<T low 이면 Qc｀=Qc(T low )), ③ 상한값과 하한값 사이이면 상기 양자화 계수를 상수를 고려하여 재조정(T low     <   Qc < T high      이면 Qc｀=Qc+k)함으로써, 전환된 영상 또는 균질한 영상의 화질을 보다 향상시킬 수 있게 된다.  
       
     비트율, 양자화 계수, 레지듀얼, 히스토그램, SAD
Patent KR-20090044793-A (KR)
Inventor: KIM EUN YOUNG
IPC: H04N5/232
Filed: 2007-11-01
Abstract: 본 발명은 어두운 곳에서 보조화면 영상을 디스플레이하는 디지털 영상 처리장치 및 그 제어방법에 관한 것으로 (a) 촬상소자에 입력되는 영상의 평균 휘도를 계산하는 단계, (b) 제1 셔터 버튼으로부터의 신호 입력시, 상기 평균 휘도가 기준 휘도보다 작은 경우 보조화면 영상을 포착하는 단계 및 (c) 상기 보조화면 영상을 디스플레이하는 단계를 포함한 디지털 영상 처리장치의 제어방법을 제공하여 사용자가 어두운 곳에서 촬영을 하는 경우에도 피사체를 원하는 구도로 촬영할 수 있도록 하는 것을 특징으로 한다. 
       
     디지털 영상 처리장치, 평균 휘도
Patent KR-20090044926-A (KR)
Inventor: LEE KWANG HO
IPC: E01C23/07
Filed: 2007-11-01
Abstract: 본 발명은 노면의 패치 형성 구역을 구획하고, 그 안에 상기 노면의 조직에 메워질 수 있는 일정 체적의 패치 입자가 부어지는 구획부재와; 상기 구획부재 안의 패치 입자를 평탄하게 펼치는 평탄화수단과; 상기 노면에 탄력적으로 밀착되어, 상기 평탄하게 펼쳐진 패치 입자를 쓸고 가면서 패치를 정형하는 정형화수단을 포함함으로써, 노면의 평균 조직 깊이를 용이하고 신속하게 측정할 수 있게 하고, 그 정확도가 상당히 높은 노면 조직 측정기구를 개시한다. 
       
     노면, 조직, 노면 조직 깊이, MTD, 패치
Patent KR-20090046139-A (KR)
Inventor: CHANG MOUNG GYUN
IPC: B62D65/00
Filed: 2007-11-05
Abstract: 본 발명은 파레트 공급용 에어의 습기 제거 장치에 관한 것으로서, 더욱 상세하게는 파레트 장비로 공급되는 에어의 습기가 냉각 및 가열이라는 2단계 과정을 통해 제거되어 파레트 장비에 녹이 발생하는 것을 차단하고, 장비의 고장이 발생하는 것을 미연에 방지하여 기존의 드라이 장치에 비해 설치 및 보수 비용을 절감시키는 파레트 공급용 에어의 습기 제거 장치에 관한 것이다. 
     이를 위해, 본 발명은 파레트로 공급되는 에어의 통로가 되는 배관과,배관 전단부의 외주면에 장착되어 에어에 함유된 습기를 냉각 액화시키는 냉각소자와, 배관 후단부의 외주면에 장착되어 냉각소자를 통과한 에어에 잔존하는 습기를 드라이하는 히팅코일로 이루어지는 파레트 공급용 에어의 습기 제거 장치를 제공한다. 
       
     파레트, 에어, 냉각소자, 히팅코일, 드레인, 습기, 에어
Patent KR-20090049174-A (KR)
Inventor: LEE DONG YOON
IPC: G02F1/136
Filed: 2007-11-13
Abstract: 본 발명은 박막 트랜지스터 기판 및 이를 구비하는 액정 표시 장치에 관한 것이다. 
     본 발명에 따른 박막 트랜지스터 기판은 일 방향으로 연장된 복수의 게이트 라인; 상기 게이트 라인과 교차되는 방향으로 연장된 복수의 데이터 라인; 및 일 게이트 라인의 일 측으로부터 상기 일 게이트 라인과 인접한 타 게이트 라인과 일부 중첩되어 상기 일 게이트 라인의 타측으로 굴곡지게 형성되는 화소 전극을 포함한다. 
     본 발명에 의하면, 소면적에서도 가로 방향으로 배열된 화소를 갖는 액정 표시 장치의 개구율 및 투과율을 향상시킬 수 있다. 
     
     가로 화소, 투과율, 화소 전극, 굴곡, 꺽쇠, 게이트 라인 중첩
Patent KR-20090049841-A (KR)
Inventor: RHO HAN SUNG
IPC: C12N1/00
Filed: 2007-11-14
Abstract: 본 발명은 류코노스톡( Leuconostoc )속 생균(기탁번호 KCTC-11226BP호)과 사카로마이세스( Saccharomyces )속 효모균주(기탁번호 KCTC-11227BP호)를 혼합시킨 전분 발효시 올리고당 생성을 증가시킨 기능성 생균제제를 제공하는 것이다.  또한 본 발명은 밀가루 반죽 100 중량부에 본 발명의 생균제제 0.01~1.0 중량부를 첨가 발효시킨 후 오븐에서 구워 제조된 올리고당 함유량이 증가된 빵을 제공하는 것이다. 
     효모, 류코노스톡, 생균제제, 올리고당, 변비, 빵
Patent KR-20090054545-A (KR)
Title: Method and apparatus for controling a exchange cycle of stripper
Inventor: PARK KI TAE
IPC: G02F1/13
Filed: 2007-11-27
Abstract: A method and an apparatus for controlling an exchange period of stripper composition are provided to optimize turbidity management of the stripper composition as minimizing unnecessary waste of the stripper composition. Turbidity of stripper composition stored within a chemical supply tank is measured(S1). The turbidity of the stripper composition is compared with a preset critical value(S2). According to the comparison result, it is determined whether to exchange or discard the stripper composition(S4). The chemical supply tank in which the stripper composition is stored comprises a light source, an optical sensor, and a controller. The light source is installed in one side within the chemical supply tank. The optical sensor is installed in the other side within the chemical supply tank in order to be faced with the light source. Light applied via the stripper composition is received for photoelectric conversion. The controller measures the turbidity of the stripper composition based on the output of the optical sensor, and compares the measured turbidity with the critical value.