baber/WOPTO huggingface dataset:
Patent KR-20000071344-A (KR)
Title: 위상동기루프회로, 편향보정회로 및 디스플레이 장치
IPC: H04N3/23
Filed: 2000-02-11
Abstract: 대형 및 평면 디스플레이 장치의 향상된 편향보정회로에 사용되는 위상동기루프(PLL) 회로를 개시한다.   PLL 회로는 위상비교회로, 필터 및 전압제어발진기(VCO)를 이 순서로 접속하고 있다.   VCO 로부터의 출력신호는 위상비교회로에 피드백된다.   PLL 회로는 외부에서 인가된 신호의 주기를 검출하는 주기검출회로 및 분주회로를 더 구비한다.   이 분주회로는 주기검출회로에 의해 검출된 주기에 따라서 VCO 로부터의 출력신호의 주파수를 분주하여 그 결과 신호를 VCO 에 피드백한다.
Patent KR-20010081303-A (KR)
Title: Optical System for Head Mount Display
Inventor: PARK JONG BAE
IPC: G02B27/01
Filed: 2000-02-11
Abstract: PURPOSE: An optic system for head mount display is provided to optimize an image by minimizing distortion phenomenon according to movement of eyes and improving the resolution of the image. CONSTITUTION: A lighting dispersion portion(30) disperses a beam emitted from a light source. A Polarization Beam Splitter(40) splits the beam emitted from the lighting dispersion portion(30). A reflective LCD screen(10) displays an image by the beam emitted from the Polarization Beam Splitter(40). A correcting lens(70) is arranged at a front portion of the reflective LCD screen(10) in order to refract the image as much as a predetermined angle. An eye lens(50) is arranged at a front portion of the Polarization Beam Splitter(40) in order to magnify the image of the reflective LCD screen(10). A protective mirror(60) is arranged at a front portion of the eye lens(50).
Patent KR-20010083405-A (KR)
Title: Circuit for suppressing a rising of high voltage in a monitor
Inventor: KIM YONG TAE
IPC: H04N5/63
Filed: 2000-02-12
Abstract: PURPOSE: A circuit for restraining a high voltage increase in a monitor is provided to limit an output high voltage of a flyback transformer when a high voltage applied to a CRT of a monitor becomes higher than a maximal limit value. CONSTITUTION: An MCU(23) compares a voltage fed back from a flyback transformer(20) with a reference voltage in order to restrain an increase of a high voltage, and outputs a control signal to restrain the increase of the high voltage according to the comparison result. A high voltage restraining section(24) includes a transistor(Q1) and a corrector resistor(R3) of the transistor(Q1). When a high level signal of the MCU(23) is applied to a base of the transistor(Q1), the transistor(Q1) is turned on. The corrector resistor(R3) of the transistor(Q1) is connected to a voltage dividing resistor(R2) with parallel. The corrector resistor(R3) of the transistor(Q1) drops a reference voltage of a comparator(21) when the transistor(Q1) is turned on.
Patent KR-20010081499-A (KR)
Title: Spacer discharging a charge and fabricating method thereof and flat panel device
Inventor: CHOI YONG SU
IPC: H01J1/30
Filed: 2000-02-15
Abstract: PURPOSE: A spacer discharging a charge and fabricating method thereof and flat panel device is provided to reduce diode emission by controlling a charges at around area after forming a metal pattern on the strip. CONSTITUTION: A metal pattern(10) connects to outer terminal and controls a field around spacer. The metal pattern(10) freely changes the trajectory of an electron beam around the spacer and couples to a metal mesh in order to reduce a diode emission by the spacer. When a metal strip pattern is formed on the side face of the spacer, an influence by charging of the spacer is reduced by it and an electric potential around the spacer is freely controlled by it. And a beam uniformity on the image indicating face of the flat board device is capable of being improved.
Patent KR-20010014494-A (KR)
Inventor: PEUSER MAKUS
IPC: G05F1/46
Filed: 2000-02-21
Abstract: PURPOSE: A circuit configuration supplying an energizing current is provided to prevent an information search of a process generated in an electronic circuit by measuring a supply current or a supply voltage. CONSTITUTION: A current source unit(5) transmits the first and the second stationary current. The first reference voltage source(12) generates the first reference voltage and the second reference voltage higher than the first reference voltage. A comparison unit(9) compares a supply voltage formed in an electronic circuit(1) and an energy storing element(8) with the first and the second reference voltage, and converts the current source into the first stationary current in case the supply voltage is over the second reference voltage, into the second stationary current in case the supply voltage is under the first reference voltage.
Patent KR-20010084594-A (KR)
Title: method for manufacturing semiconductor devices
Inventor: JUNG HOE SIK
IPC: H01L21/32
Filed: 2000-02-28
Abstract: PURPOSE: A method for manufacturing a semiconductor device is provided to be capable of enhancing the alignment between a photoresist layer pattern of a sub chuck and a main chuck without being affected by a flow process of a photoresist layer. CONSTITUTION: First, a lower interlayer insulating layer(11) is formed on a semiconductor layer(10), and then a photoresist layer pattern of which an aperture is arranged on a defined area is formed thereon. Then, an etching hole of the lower interlayer insulating layer corresponding to the aperture is formed as a main chuck using the photoresist layer pattern. Next, an upper interlayer insulating layer(15) is formed on the semiconductor layer(10) and the lower interlayer insulating layer(11) within the etching hole. Finally, a photoresist layer pattern(19) of trench type having an aperture(18) overlapped with the etching hole is formed on the upper interlayer insulating layer(15) as a sub chuck.
Patent KR-20010090190-A (KR)
Title: A Growth Chamber for Mushroom and Method for Cultivation of Mushroom
Inventor: CHOI BYUNG HWA
IPC: A01G1/04
Filed: 2000-03-23
Abstract: PURPOSE: A box for cultivating mushrooms and a method for cultivating mushrooms by using thereof are provided to increase the income of farmhouses cultivating mushrooms by making the loss of a culture medium in cultivating mushrooms to minimum and reducing the manpower for trimming mushrooms. CONSTITUTION: In the box for cultivating mushrooms is composed of a box portion(1) and a cover portion(3). The upper part of the box portion(1) is opened and the box portion(1) has a hexahedron form and the bottom has a gas discharging member(2) and legs(11) in parts of apexes are projected. The germination inducing holes(31) of the cylinder type are formed on the cover portion(3) to install the gas discharging member(2). The cover portion(3) is formed possible to be desorbed on the upper part of the box portion(1).
Patent KR-20010092818-A (KR)
Title: Metal mold for pressing a panel for a motor vehicle and method for manufacturing the metal mold
Inventor: KIM MIN SU
IPC: B21D24/00
Filed: 2000-03-27
Abstract: PURPOSE: A mold for processing a press of a car panel and a method for manufacturing the mold are provided to manufacture a new type mold easily and rapidly with the cheap cost even if the plan of the panel is frequently changed by forming a new type form portion in an existing body. CONSTITUTION: In the mold for processing the press of the car panel and the method for manufacturing the mold, an upper mold(10), a lower mold(20), a holder(30), a body(11), a supporting piece(12) and a form portion(15) are included. The upper mold(10) is composed of the body(11) and the form portion(15). The body(11) is made of metal materials. The supporting piece(12) surrounding the form portion(15) is extended to the lower side. The form portion(15) is made of resin materials and is sticked on the lower face of the body(11) and the thickness of the form portion(15) is 20mm-30mm and has a processing portion. Many resin injecting portions(13) and gas discharging portions(14) are formed by going through body(11).
Patent KR-20010096136-A (KR)
Title: Subscriber information transmitting method of voice mailing system
Inventor: LEE DONG PYO
IPC: H04M3/533
Filed: 2000-04-17
Abstract: PURPOSE: A method for transmitting subscriber information in a VMS(Voice Mailing System) is provided to carry out an inter-VMS subscriber transfer without the loss of subscriber information and voice mail information. CONSTITUTION: In case that the first VMS tries to transmit subscriber information to the second VMS, the first VMS lists up subscribers to be transmitted(S210). Then the first VMS backs up the information of the subscribers(S220). The first VMS restores this backup information in the second VMS(S230). If a call path is formed between the first VMS and the second VMS by a switching system, the first VMS transmits the subscriber information and voice mail information of the subscribers to the voice mail boxes of the subscribers restored in the second VMS respectively(S240). In case that the operator of the first VMS(or the second VMS) requests the output of subscriber information(S250), the first VMS(or the second VMS) outputs relevant subscriber information so that the operator can always monitor the current status(S260).
Patent KR-20010096264-A (KR)
Title: A method and a device of mixing for audio cd
Inventor: NAM DO HYEONG
IPC: G11B20/10
Filed: 2000-04-18
Abstract: PURPOSE: A mixing device of an audio CD(Compact Disc) and a mixing method are provided to generate a new audio signal by performing a sampling process, a reverse sampling process, and a pitch variable process of a signal stored in a memory. CONSTITUTION: A servo portion(130) processes a coded data signal applied from an amplification portion(120) and outputs an operating state certification signal and a digital audio signal of an instrument portion(110), separately. A DSP(Digital Signal Processor) portion(140) corrects an error of the coded digital audio signal applied from the servo portion(130), changes a transmission speed, and performs a reverse sampling operation according to a control operation of a CPU(160). A compression/decompression portion(180) compresses the digital audio signal or decompresses the compressed digital audio signal according to the control operation of the CPU(160). A memory(190) stores the signal applied from the compression/decompression portion(180) or outputs the stored signal to the compression/decompression portion(180) according to the control operation of the CPU(160).
Patent KR-20000037405-A (KR)
Inventor: KIM CHANG WHAN
IPC: B60T1/06
Filed: 2000-04-19
Abstract: PURPOSE: A brake device of a vehicle is provided to give friction to some part of a rear tire and the surface by passing the compressed air through the inner part of a cylinder formed with the compressed air and moving a piston. CONSTITUTION: In stepping a pedal a certain depth during the movement of a vehicle, the air of the compressed air is flowed into a cylinder via a nozzle(2). An air dam blocks a groove inside a piston, and the piston is moved by the pressure of the air. A round(6) obtains a rotational force by receiving resistance against a and b, and the rotational force gives a friction force to a certain part of a wheel combined with the round so that the round gives a proper friction force to a and b. In case of a, the round is combined with a certain part of the tire and give resistance to a rear wheel driving device. In case of b, as the round moves on a certain part of a front bumper with a certain force, an event that the vehicle is leaned forward is relieved. Further, the abrasion of the tire is decreased by delaying the damage of the surface and dispersing the friction force as increasing the friction force and the earthing space with the ground.
Patent KR-20010102791-A (KR)
Inventor: KIM HAK HOON
Filed: 2000-05-08
Abstract: 본 발명의 개인 포탈 제공시스템은, 홈페이지 제공 서버에 다양한 형태의 분산구조적 콘텐츠 디렉토리를 갖는 포탈 맵을 제공하는 홈 포탈 제공 서버, 콘텐츠 디렉토리에 콘텐츠를 제공하는 콘텐츠 제공 서버를 포함한다. 개인 포탈 제공 방법은 클라이언트 컴퓨터로부터 전송받은 네트워크 사용자의 기본등록정보를 이용하여 개인 포탈 영역을 할당하는 단계, 네트워크 사용자가 선택한 콘텐츠와 기능에 대한 정보를 클라이언트 컴퓨터로부터 전송받는 단계, 위의 기본등록정보와 전송받은 콘텐츠 선택 정보를 이용하여 개인 포탈을 생성, 제공하는 단계를 포함한다. 본 발명의 개인 포탈 제공 시스템 및 방법에 따르면, 개인 포탈 이용자가 원하는 정보를 포함하는 디렉토리만으로 구성된 검색엔진을 통하여 원하는 정보에 신속하고 정확하게 접근할 수 있으며, 필요시 언제든지 검색가능한 디렉토리를 확장할 수 있고, 개인 포탈 이용자가 원하는 기능만으로 구성된 개인 포탈을 이용하여 원하는 인터넷 기능을 보다 편리하게 선택적으로 이용할 수 있다
Patent KR-20010104140-A (KR)
Inventor: JUNG GWANG JIN
Filed: 2000-05-13
Abstract: 본 발명은 반도체 제조공정 및 액정디스플레이 제조공정 중에서 확산공정, 화학증착공정, 건식세정공정 등의 여러 가지 공정에 적용할 수 있는 다 기능성 반응기에 관한 것이다. 본 발명은 반응가스를 활성화시키는 반응가스 활성실과, 활성화된 반응가스에 의하여 시료의 표면반응이 일어나는 반응실과, 상기 반응 가스 활성실과 상기 반응실 사이를 격리시키는 차단부로 구성된다. 상기 반응가스 활성실은 적어도 하나의 반응가스 활성기를 포함하고 있으며, 이 반응가스 활성기는 반응가스들이 도입되는 반응가스 도입부와, 상기 도입된 반응가스들을 활성화시키는 반응가스 활성화 가열부와, 반응가스들이 열 방출 없이 충분한 열에너지를 흡수하도록 구성된 반응가스 가스관과, 열 방출을 막기 위하여 내부 전반사 코팅을 한 내부 열 반사부 및 외부 열 전사 차단부와, 상기 활성화된 반응가스들을 균일하게 분사시키는 반응가스 분사부를 포함하여 구성되고, 상기 반응실은 높이 조절과 회전이 가능한 하부 가열부를 포함하여  구성되는 것을 특징으로 한다. 본 발명에 의하면 동일 반응기에서 응용할 수 있는 반도체 공정의 종류를 다양화 할 수 있는 이점이 있다.
Patent KR-20000054088-A (KR)
Inventor: SEO SU GIL
IPC: H04W4/06
Filed: 2000-05-22
Abstract: PURPOSE: A method for transmitting messages with cellular phones is provided to transmit messages to other cellular phone users by making customers connect to home pages of message transmitting service providers through the internet to select services, or by receiving various message data from the service providers with cellular phones of the customers. CONSTITUTION: A method for transmitting messages with cellular phones through the internet comprises the steps of: making a member connect to a host server of a service provider to receive an authentication, and select a target for receiving a message of the member; making the member select contents of the service provider; making the member input the message; mixing the contents with the message to perfect a final animation; previewing the final animation on the web; making the member convert the final animation according to a data transmission protocol of a mobile communication carrier; transmitting the converted animation to a cellular phone of the target, via a data transmission center and a base station of the mobile communication carrier; and making the cellular phone of the target drive the animation by using a predetermined software of the cellular phone.
Patent KR-20010106812-A (KR)
Inventor: SONG KYUNG SOO
Filed: 2000-05-23
Abstract: 본 발명은 재테크를 하는 사용자들을 위한 것으로, 예를 들면 사이버 증권거래를 하는 사용자들을 위하여 양질의 증권 컨설팅 서비스를 무료로 제공하고, 이를 이용하던 회원들이 사이버재테크장치와 협약된 증권사에 사이버 거래 계좌를 개설할 경우 증권수수료의 일부를 상기 회원과 일정 비율로 분배하고, 이미 증권 거래 계좌를 개설한 사용자가 사이버재테크장치에 가입하여 증권거래를 하였을 경우에도 상기 증권사가 사이버재테크장치와 협약된 증권사이면 증권수수료의 일부를 환급받을 수 있도록 하며, 사이버재테크장치를 통해 벤처기업의 주식을 직접 거래할 수 있도록 하고, 이러한 주식을 매수할 경우 사이버 머니와 포인트점수 또는 현금을 이용하여 주식을 매수할 수 있도록 하고, 또한 보험상품도 상기 증권 구입과 유사하게 구입할 수 있도록 하는 사이버재테크장치 및 그 방법에 관한 것으로, 사이버재테크장치에 가입된 회원에게 장치 및 이와 협의된 곳에서 획득한 포인트점수 또는 사이버머니를 이용하여 주식을 매수 할수 있도록 하거나 혹은 현금으로 되돌려주므로써, 재테크로 활용할 수 있는 잇점을 제공하고, 부동산 뮤추얼 펀드등을 모집하여 회원에게 신뢰성 있는 투자를 할 수 있도록 하며, 또한 수익률 게임을 통해 입상자들에게 상금을 보상하고, 상기 입상자들에게 펀드매니저직을 할수 있는 정보를 알선하여, 입상자들의 의사에 따라 펀드매니저를 할수 있는 기회를 제공하는 이점을 수반한다.
Patent KR-20010108865-A (KR)
Inventor: BAEK SEOK IL
Filed: 2000-06-01
Abstract: 본 발명은 시계장치의 시각을 교정하기 위한 표준시각데이터 공급 장치에 관한 것으로, 정확한 표준시각을 표시하는 표준시계부에서 제공하는 표준시각데이터를 신호처리하여 원거리에 있는 디지털 시계장치 또는 컴퓨터시스템으로 데이터 전송하여 디지털 시계장치 또는 컴퓨터시스템이 정확한 시각을 표시하도록 하는 시계장치의 시각을 교정하기 위한 표준시각데이터 공급 장치에 관한 것이다. 
     본 발명의 상기 목적은 표준시각데이터송신부에서 표준시각데이터를 RF 또는 RS422 또는 RS485신호로 변환하여 기존에 설치되어 있는 텔레비젼공시청시설 또는 구내전화망시설을 통하여 표준시각데이터수신부로 전송하여 원거리에 있는 시계장치로 표준시각데이터를 공급하여 시계장치가 정확한 시각을 표시하도록 하는 시계장치의 시각을 교정하기 위한 표준시각데이터 공급 장치에 의해서 달성이 가능하며, 또한 표준시각데이터를 RS422직렬통신방식의 신호로 변환하여 표준시각데이터수신부로 전송된 RS422신호를 컴퓨터시스템에서 인식할 수 있는 RS232신호로 변환하여 컴퓨터시스템이 정확한 시각을 표시하도록 하는 시계장치의 시각을 교정하기 위한 표준시각데이터 공급 장치에 의해서 달성이 가능하다.
Patent KR-20010111377-A (KR)
Inventor: SHIN KYU SIK
Filed: 2000-06-10
Abstract: 본 발명은 전자상거래의 무료배송장 발급방법에 관한 것으로, 전자상거래를 위한 웹사이트에서 구매자가 원하는 물품을 주문한 후 그 물품에 대한 배송료 등을 감면받기 위해 상기 활성화된 웹사이트 상에서 무료배송장을 신청하면, 해당업체에서는 그 신청에 대한 적법성을 판단하여 승인된 사항에 한해서 승인번호가 기재된 무료배송장을 출력 허가하게 되는 바, 구매자는 물품의 대금만 지불하게 되어 비용의 부담을 감소시키게 된다.
Patent KR-20010112718-A (KR)
Title: Fiber for a wig comprising PET and PBT
Inventor: LEE HO CHEOL
IPC: D01F8/14
Filed: 2000-06-12
Abstract: The invention relates to a device for cleaning the tread elements of an escalator or rolling walkway, which device comprises cleaning elements acting on the individual tread elements. The invention provides for a device which can be driven approximately parallel to the tread elements in an oscillating manner. The invention also relates to a corresponding cleaning method and a method for cleaning the tread elements of an escalator or rolling walkway having a controllable drive mechanism by means of a cleaning device. According to said method the escalator or rolling walkway is controlled by signals emitted by the control unit of the cleaning device. The invention further relates to a device for carrying out said method.
Patent KR-20020000392-A (KR)
Title: Self diagnostic apparatus in variable length decoder
Inventor: PARK SEONG WAN
IPC: H04N19/42
Filed: 2000-06-24
Abstract: PURPOSE: A self diagnostic device of a variable decoder is provided to find easily erroneous parallel stages by checking operating states of various parallel processing stages. CONSTITUTION: A slice input portion(10) is used for checking input data and states of input buffers(31a-31c,41a-41c). The input buffers(31a-31c,41a-41c) provide full state signals to the slice input portion(10). The first and the second barrel shifters(32,42) are used for checking states of data read from the input buffers(31a-31c,41a-41c). The first and the second VLD state controllers(33,43) are used for checking error flags of each level by detecting errors of a slice level, a macro block level, and a block level of the input data. The first and the second VLD state controllers(33,43) perform a decoding process. The first and the second VLD state controllers(33,43) detect errors of the slice level, the macro block level, and the block level and generate error signals by synthesizing the errors. A slice output portion(70) is used for checking full states of out buffers(36a-36e,46a-46e).
Patent KR-20020003970-A (KR)
Title: The vehicle navigation device including temperature-compensation function and the method thereof
Inventor: LEE IN HONG
IPC: G08G1/0968
Filed: 2000-06-28
Abstract: PURPOSE: A car interface free navigation system with a temperature compensation function and a method for compensating temperature are provided to display correctly a location of a vehicle by removing efficiently a bias error of a sensor. CONSTITUTION: A GPS(Global Positioning System) receiver(8) is used for obtaining measured data from a multitude of GPS satellites. A sensor portion(1,2,3) has an acceleration sensor(1) for measuring acceleration of a vehicle, a yaw gyro sensor(2) for measuring rotary angular velocity of the vehicle, and a pitch gyro sensor(3) for measuring angular velocity of a pitch of the vehicle. A temperature detection portion(12) measures temperature around the sensor portion(1,2,3). A normal error correction portion(13) corrects a bias error according to a thermal variation of the sensor portion(1,2,3). A distance calculation portion(5) is used for calculating a moved distance of the vehicle. A yaw calculation portion(6) is used for calculating a moved yaw of the vehicle. A relative location calculation portion(7) is used for calculating a relative location of the vehicle. A map storage portion(10) is used for storing map data. A location decision portion(9) is used for deciding a final location of the vehicle by reading the relative location, an absolute location, and map data. A display portion(11) is used for displaying the map data and the location information.
Patent KR-20010029865-A (KR)
Title: Automated calibration in a projection display apparatus
Inventor: BURNETT ANGELA RENEE
IPC: H04N5/445
Filed: 2000-06-29
Abstract: PURPOSE: An automatic correction method for projection display device is provided to avoid incompatibility of measurement caused by wide variation in sensor illuminating level. CONSTITUTION: A video generator(310) is controlled by a control logic portion(301) so as to generate a green block M at a prescribed sensor such as horizontal and vertical screen positions. Upon illuminating a sensor, electric charges generated by light work so that the sensor may show lower impedance to branch a larger current Isen from a reference current (Iref) and to separate a current Isw from a sensor detector(275). A sensor current is measured by a increasing reference current Iref until switching the detector(275) in order to indicate that sensor illumination is lost. This current is processed as a prescribed threshold to the sensor and a color and is stored.
Patent KR-20000058819-A (KR)
Inventor: LEE CHAN CHEOL
IPC: G06Q30/00
Filed: 2000-06-30
Abstract: PURPOSE: A clothing distribution system and a clothing manufacturing method on the internet are provided so that a user can make a purchase decision after trying a desired style of clothing on virtually through the electronic network system. CONSTITUTION: A user outputs his body type characteristics through a body type measurement program(400,402). The user selects the design and colour of a desired clothing(404). The user selects the size of the clothing(406). The user puts on the selected clothing virtually through his figure shown on the monitor(408). The user makes a purchase decision for the selected clothing(410). After ordering the selected clothing, the user pays for the price through an electronic settlement method(412).
Patent KR-20020003444-A (KR)
Inventor: KIM SOON HO
IPC: B60P3/00
Filed: 2000-07-03
Abstract: PURPOSE: An FRP(Fiber glass Reinforced Plastics) vehicle for transferring is provided to maintain original shape of contents, to extend a life span of a vehicle by reducing weight and to prevent waste of fuel. CONSTITUTION: An FRP(Fiber glass Reinforced Plastics) transferring vehicle is produced by forming a tank mounted on the vehicle as the FRP material. The FRP transferring vehicle produces the drum installed on the vehicle with the fiberglass reinforced plastics. Moreover, the FRP transferring vehicle manufactures deck contained in a truck by the FRP material. The vehicle produces sub and main frames with the FRP frame. The FRP transferring vehicle produces entire components installed on a cleaning vehicle. Thereby, the FRP transferring vehicle maintains an original shape of contents by producing the vehicle according to the transferred contents. Thereby, the FRP transferring vehicle extends a life span of the vehicle by reducing weight of the vehicle.
Patent KR-20020006137-A (KR)
Title: Phase thickness measurement system for galvannealed steel and method thereof
Inventor: HONG JAE HWA
IPC: G01B7/06
Filed: 2000-07-11
Abstract: PURPOSE: A thickness measuring device for an alloy phase of a steel plate plated with alloyed molten zinc and a method thereof are provided to measure and analyze the respective alloy phases of a plating/melting zinc plate steel plate with high precision at a low cost in a short time. CONSTITUTION: A thickness measuring device for an alloy phase of a steel plate plated with alloyed molten zinc includes an analysis tub(20) for receiving electrolyte inside and formed with an opening part(22) at a side wall, a holder(24) formed around the opening part for samples to contact the electrolyte via the opening, a reference electrode(30) connected to the sample by a wire(34) mounted with a voltage meter(38) and immersed into the electrolyte, and a corresponding electrode(32) connected to the sample by a wire(36) mounted with a constant current supply unit(40) and immersed into the electrolyte, wherein thicknesses of each phase are measured by converting a potential difference and etching time between the reference electrode and the sample after applying a constant current to between the sample and the corresponding electrode.