baber/WOPTO huggingface dataset:
Patent KR-20060036926-A (KR)
Title: Position sensor by detection of a tangential magnetic field
Inventor: ANDRIEU OLIVIER
IPC: G01D5/14
Filed: 2004-06-11
Abstract: The invention relates to a position sensor of the type comprising an encoder, formed by a multipolar magnetic ring (1), provided on the circumference thereof with alternate north poles and south poles and mounted to run in front of a measuring cell (2), whereby at least one of said poles of a fixed sign is deemed irregular and comprises, in particular, means for correction of the value of the magnetic field thereof such as to stabilise the magnetic signal provided by means of the passage of the poles adjacent to said irregular pole. According to the invention, the measuring cell (2) is sensitive to the tangential component of the magnetic field provided by the poles, the correction means are produced by means of a surface zone (4) of the irregular pole (Pi) surrounded by a connection pole (5), for the adjacent poles, of the same sign as the adjacent poles, the correction means (3) being embodied such that the tangential magnetic signal, generated by the passage of each adjacent pole around said irregular pole, varies in a monotone manner.
Patent KR-20060054199-A (KR)
Title: Endoscopic attachment device
Inventor: HERN S REN
IPC: A61B17/28
Filed: 2004-06-18
Abstract: A sheath device (1) suitable for endoscopic instruments (2) and comprising an elongated tubular member (4) having a proximal end (6), a distal open end (7), and at least one fluid channel (23). A flushing unit (5) is connected to the proximal end (6) of the tubular member (4) and comprises a proximal open end (8) suitable for receiving a first endoscopic instrument (2), a fluid inlet (16) in contact with said fluid channel (23), and a fluid outlet (17). The tubular member and the flushing unit together define a first interior guiding passage (10) for sheathing at least a part of said first endoscopic instrument (2). The connection between the tubular member (4) and the flushing unit (5) allows for axial rotation of the tubular member (4) in relation to the flushing unit (5).
Patent KR-20070073056-A (KR)
Title: Producing method of tissue calture and changing botanically make use to silver nano
Inventor: KIM TAE HYUN
IPC: C12N5/04
Filed: 2006-01-03
Abstract: A method for preparing variant plant is provided to mass-produce the plant by systematically producing and breeding an excellent variant plant generated during culturing a plant tissue, thereby contributing to self-growth capability of floricultural industry and seedling industry. The method comprises the steps of: (a) taking organs, tissues and cells from a plant and then aseptically culturing it in a tube or a bottle to remove callus or mono-cell colony therefrom; (b) after adding 0.15% of p-dimethylaminobenzaldehyde[(CH3)2NC6H4CHO] to a medium for proliferation, culturing the plant obtained from the step(a) therein for 20 days to produce PLB having various colors; and (c) respectively subculturing the modified PLB in accordance with shapes and forms to obtain a complete adult plant.
Patent KR-20070074262-A (KR)
Title: Handler for testing semiconductor devices and method for controlling the same
Inventor: PARK YONG GEUN
IPC: H01L21/66
Filed: 2006-01-09
Abstract: A semiconductor device test handler and a controlling method thereof are provided to reduce the size of the handler by changing the position of a test tray between a horizontal state and a vertical state using an improved rotator structure composed of a first and a second rotators. A semiconductor device test handler includes a loading unit(30) for loading semiconductor devices on a test tray of a horizontal state; a first chamber for heating or cooling the semiconductor devices of the test tray; a first rotator(52) for changing the position of the test tray from the horizontal state to a vertical state; a test unit with a test head capable of performing predetermined tests on the semiconductor devices; a second chamber for returning the temperature of the semiconductor devices; a second rotator; and an unloading unit. The second rotator(72) is used for changing the position of the test tray from the vertical state to the horizontal state. The unloading unit(40) is used for unloading the semiconductor devices from the test tray.
Patent KR-20070074267-A (KR)
Title: Broadcasting receiving system
Inventor: HONG SUNG RYONG
IPC: H04N5/44
Filed: 2006-01-09
Abstract: A broadcasting receiving system is provided to reduce an interference phenomenon from a digital demodulating unit by controlling the power of an oscillator when an analog demodulating unit receives and demodulates an analog signal and the digital demodulating unit does not demodulate digital broadcasting. An analog/digital broadcasting tuner selectively receives an analog broadcasting signal and a digital broadcasting signal from an antenna. An analog broadcasting demodulating unit demodulates the received analog broadcasting signal. A digital broadcasting demodulating unit demodulates the received digital broadcasting signal. An oscillator(404) generates and provides a clock used in the digital signal process of the digital broadcasting demodulating unit. A control unit(403) outputs a control signal for controlling the power supply of the oscillator(404) according to whether the digital broadcasting signal is received. A switching unit(402) supplies power to the oscillator(404) or blocks the power supply according to the control signal.
Patent KR-20070074923-A (KR)
Title: Method to make vessel with heat insulation surface layer
Inventor: CHANG SHENG SHU
IPC: B65D8/04
Filed: 2006-01-11
Abstract: A method for manufacturing a vessel with a surface heat insulation layer is provided to form one foam layer on the surface of the vessel by spreading composite paint made by mixing a liquid adhesive agent and heated foam particle powders on the surface of a paper or various vessels and then foaming foam particles by heating the paper or the vessel. The method for manufacturing a vessel(7,7') with a surface heat insulation layer comprises the steps of: producing composite paint(4) by mixing a liquid adhesive agent(1) and heated foam particle powders(2); applying the composite paint on the surface of the paper or vinyl vessel or a half-finished product(6); heating the container coated with the composite paint by a heater(8); forming one foam layer(9) by foaming the composite paint on the surface of the container; and integrating the surface of the vessel with the foam layer by solidifying the liquid adhesive agent of the foam layer. Therefore, the foam layer formed on the surface of the vessel has reinforcement, heat insulation, and burn preventing effects.
Patent KR-20060133884-A (KR)
Title: Mobile phone with an indication function and method for operating the mobile phone to provide the indication function
Inventor: SEN HAO LAN
IPC: H04B1/38
Filed: 2006-01-11
Abstract: A mobile terminal having an indication function and an indication function operating method are provided to promote a value of a mobile terminal by preventing an injury to the user's or someone else's eyes although the user operates an indicator by accident. A mobile terminal body(11) includes a keypad(111) and a display(113). An external antenna(12) is provided at the mobile terminal body(11). An indicator(13) includes a light emitting unit(131) provided in the external antenna(12) and a control circuit(133) provided in the mobile terminal body(11). An indication enabling device(14) is provided at the mobile terminal body(11), electrically connected with the control circuit(133), and is operated to drive the control circuit(133) to control the light emitting unit(131) to emit a beam. The display(113) indicates a user interface, and the keypad(111) is controlled through the user interface to drive the indicator(13).
Patent KR-20070023484-A (KR)
IPC: H04W74/08
Filed: 2006-01-20
Abstract: 본 발명은 무선 이동통신 시스템에서 상향링크 억세스 채널을 통한 메시지 전송 및 수신 방법에 관한 것이다. 본 발명에 따른 억세스 채널을 통한 메시지 전송 방법은, 무선 이동통신 시스템에서 상향링크 억세스 채널(access channel)을 통한 메시지 전송 방법에 있어서, 상기 상향링크 억세스 채널을 통해 기지국으로의 제1 랜덤 억세스 과정을 수행하는 단계와, 상기 제1 랜덤 억세스 과정에서 상기 기지국으로 전송된 특정 프리앰블 또는 제1메시지의 송신전력으로부터 유도된 값을 초기 프리앰블의 송신전력으로 하여 제2 랜덤 억세스 과정을 수행하는 단계를 포함하여 구성됨을 특징으로 한다. 
       
     이동통신, 억세스 슬롯, 프리앰블, 메시지, RACH, PRACH
Patent KR-20060088025-A (KR)
Inventor: TAKAKUSAKI SADAMICHI
IPC: H01L25/18
Filed: 2006-01-24
Abstract: 본 발명의 과제는 땜납 페이스트를 용융하여 얻을 수 있는 땜납에 수축이 발생하는 것을 방지하는 것이다.  
     본 발명의 회로 장치인 혼성 집적 회로 장치(10)는, 패드를 포함하는 도전 패턴(18)이 기판(16)의 표면에 형성되어 있다.  패드(18A)는 상면에 히트 싱크(14D)가 적재되므로 비교적 대형으로 형성된다.  패드(18B)는, 칩 부품(14B) 및 소신호의 트랜지스터(14C)가 고정 부착되는 소형 패드이다.  본 발명에서는, 패드(18A)의 표면에는, 니켈로 이루어지는 도금막(20)이 형성되어 있다.  따라서, 패드(18A)와 땜납(19)이 접촉하지 않으므로, 납땜성이 나쁜 Cu/Sn 합금층이 생성되지 않고, 납땜성이 우수한 Ni/Sn 합금층이 생성된다.  이로부터, 용융된 땜납(19)에 수축이 발생되는 것이 억지되어 있다.  
       
     땜납, 도금막, 패드, 트랜지스터, 칩 부품
Patent KR-20060116683-A (KR)
Title: Device for connecting precast concrete structures
Inventor: HUR YOUNG WOONG
IPC: E02D29/045
Filed: 2006-01-24
Abstract: A connecting device of precast concrete structures is provided to prevent the subsidence of the ground and the crack formation of a road or a concrete structure and to reduce distribution expenses by increasing the connecting strength of a concrete structure and a concrete structure. A connecting device of precast concrete structures contains a connecting member(120) such as a bolt and a nut to connect a precast concrete structure(1) and a precast concrete structure adjacent to a side wall of the precast concrete structure via connecting holes(102) of frames(100). Hereon the coupling member is formed in the Ý‹-shape to settle the other side of the frame with the adjacent frame and injected with mortar inward to settle the frame and the coupling member and to prevent corrosion.
Patent KR-20060024825-A (KR)
Inventor: TEUSCHLER THOMAS
IPC: H01L21/00
Filed: 2006-01-31
Abstract: 본 발명은 전면; 후면; 및, 반도체웨이퍼의 중심에서 반경거리에 위치하며 반도체웨이퍼의 둘레를 형성하고 반도체웨이퍼의 프로파일 경계의 부분인 에지(R)를 가진 연마반도체웨이퍼에 관한 것이며, 후면의 R-6mm ~ R-1mm간 영역에서 이상적 평면으로부터 후면의 평면도의 최대편차는 0.7㎛ 이하이다.  또한, 본 발명은 유체부식액을 통한 반도체웨이퍼의 최소한 1회처리 및 반도체웨이퍼의 최소한 전면의 최소 1회연마로 이루어진 반도체웨이퍼를 제조하는 방법에 관한 것이며, 이때 부식액은 처리기간중 반도체웨이퍼의 경계로 흐르며, 부식액의 흐름을 면하고 있는 반도체웨이퍼의 경계는 직접 부식액에 의해 충돌되지 않도록 최소 부분적으로 차폐된다.  차폐는 반도체웨이퍼의 두께(d)방향으로 연장되며, 최소 d+100㎛의 길이를 가진다. 
       
     반도체웨이퍼, 유체부식액, 차폐, 양면연마.
Patent KR-20070079493-A (KR)
Title: Apparatus and method for supplying dc power source
Inventor: KIM HAG WONE
IPC: H02M7/21
Filed: 2006-02-02
Abstract: A method and an apparatus for supplying a DC voltage are provided to improve a power factor of an input voltage source by controlling an energy which is supplied to a load. A DC supply device includes a load detector(310), a power factor improvement controller, an input current feedback unit(330), a filter/rectifier(320), a power factor improving unit(350), a flattening unit(360), and an inverter(370). The load detector detects an input current quantity to calculate a size of a load. The input current feedback unit controls an input voltage to feed back a current to an input voltage source according to an input current quantity control signal. The filter/rectifier rectifies and steps up the input AC voltage and suppresses harmonics from the input current. The power factor improving unit supplies a charged energy to the load according to a power factor improvement control signal. The smoothing unit converts the rectified input AC voltage to a DC voltage. The inverter converts the smoothed DC voltage to an AC voltage.
Patent KR-20070087932-A (KR)
Title: The base paper and method to product paper
Inventor: LEE NAM JOONG
IPC: D21H17/00
Filed: 2006-02-10
Abstract: A method for manufacturing base paper for a cigarette packet and the base paper for the cigarette packet are provided to manufacture a base paper having a far-infrared function and an anion function through only one manufacturing process, thereby imparting the far-infrared function and the anion function to cigarettes without a separate process. A pulping process is performed by dissolving pulp in water, and a first papermaking process is performed. A first coating process is performed by coating a rear surface of base paper with far-infrared chemicals through a first coating unit(200). A first drying process is performed by drying the coated base paper through a first drying unit(210). A second coating process is performed by coating a front surface of the base paper with an anion coating solution, where tourmaline of 3-20% and dyes are mixed, through a second coating unit(220). A second drying process is performed by drying the coated base paper through the second drying unit. A third coating process is performed by coating the dried base paper with a high-grade print coating solution through a third coating unit(240), and a third drying process is performed by drying the coated base paper through a third drying unit(250). A second papermaking process is performed on the base paper after the coating processes and the drying processes.
Patent KR-20070082183-A (KR)
Title: Process for olefin polymerization using catalysts compositon comprising dinuclear transition metal complexes
Inventor: KIM YANG KEE
IPC: C08F10/00
Filed: 2006-02-15
Abstract: An olefin polymerization process using a binuclear transition metal compound is provided to obtain an ultralow-density polyolefin having a density of less than 0.910 g/cc in an industrial scale via a continuous process. An olefin polymerization process comprises a step of reacting monomers with a catalyst composition in a continuous reactor, the catalyst composition comprising: a precatalyst that is a transition metal compound represented by the following chemical formula 1; a first cocatalyst that is an alkylammonium compound represented by the chemical formula of Al(R6)3 (wherein R6 is a C1-20 hydrocarbyl or halogen-substituted C1-C20 hydrocarbyl); and a second cocatalyst formed of a Bronsted acid cation and a non-coordinated anion as represented by the chemical formula of [L-H]+[ZA]- (wherein L is a neutral Lewis base; [L-H]+ is a bronsted acid; Z is B or Al having an oxidation number of +3; A is a substituted C6-C20 aryl or alkyl radical). In chemical formula 1, each of R1 and R2 independently represents H, alkyl, aryl, silyl, alkenyl, alkylaryl, arylalkyl or hydrocarbyl-substituted Group 14 metalloid radical, or R1 and R2 together form a ring by being linked to each other via an alkylidene radical; R3 is alkyl, aryl, silyl, alkenyl, alkylaryl, arylalkyl or hydrocarbyl-substituted Group 14 metalloid radical; R4 each represents H, halogen, alkyl or aryl, or two R4s are linked to each other; E is a covalent bridging group for linking two phenylene rings to each other; M is Ti, Zr or Hr; each of Q1 and Q2 represents halogen, alkyl, arylamido, alkyl, alkenyl, aryl, alkylaryl, arylalkyl or alkylidene.
Patent KR-20070013999-A (KR)
Title: Field emission display device and method of operating the same
Inventor: LI JUNG YU
IPC: H01J1/30
Filed: 2006-02-23
Abstract: A field emission display device and a method for operating the same are provided to transmit electrons from one of first and second conductive layers to the other first and second conductive layers in a direction perpendicular to a normal direction of a substrate. A field emission display device includes a substrate(22), a first conductive layer(23) formed on the substrate and biased at first voltage level, a second conductive layer(25) formed on the substrate and biased at a second voltage level, emitters(26,27) formed on the first and second conductive layers for transmitting electrons, and a phosphor layer(24) formed between the first and second conductive layers. The electrons are transmitted from one of the first and second conductive layers to the other of the first and second conductive layers in a direction perpendicular to the substrate.
Patent KR-20070088103-A (KR)
Title: A driving apparatus for plasma display panel
Inventor: KWAK JONG WOON
IPC: G09G3/296
Filed: 2006-02-24
Abstract: A driving apparatus for a plasma display panel is provided to reduce a cost for manufacturing a driving circuit and to enhance productivity of an AC type plasma display panel by maintaining a Z-electrode in a ground voltage level. A driving apparatus for a plasma display panel includes scan/sustain electrodes, sustain electrodes, address electrodes, and a panel connected with the electrodes. The driving apparatus includes a mechanism heat-radiating plate(100) and at least one connector(200). The mechanism heat-radiating plate is used for radiating the heat from the panel and a ground voltage level. The connector is used for connecting the ground voltage level of the mechanism heat-radiating plate with the panel. The ground voltage level is maintained in a sustain electrode. The mechanism heat-radiating plate includes a conductive material.
Patent KR-20070088121-A (KR)
Title: Frp forming body and the methode
Inventor: HAN SANG DUCK
IPC: B32B27/06
Filed: 2006-02-24
Abstract: An FRP(Fiberglass Reinforced Plastic) molded body reflecting/emitting the light and a manufacturing method thereof are provided to simplify a manufacturing process and to shorten the manufacturing time by expressing patterns through metallic materials without attaching a non-woven fabric, a paper, or a film printed with the patterns, on the surface of the FRP molded body. An FRP molded body(10) reflecting/emitting the light is composed of a first transparent gel coat layer(11) containing metallic materials(11a) and reflecting/emitting the light according to the external light; a colored gel coat layer(12) for emitting the color to the outside of the first transparent gel coat layer; an FRP layer(13) for reinforcing the molded body; and an MDF(Medium Density Fiber Board) layer(14) and a second transparent gel coat layer(15) for secondly reinforcing the molded body.
Patent KR-20060106657-A (KR)
Inventor: TAKADA MASATOSHI
IPC: H03H11/20
Filed: 2006-02-28
Abstract: 온도 변화 등에 의해 제어 전압을 전환할 때에 위상의 불연속이 발생했다고 해도, 안정한 제어가 가능한 위상 합성 다이버시티 수신기의 실현을 목적으로 한다.   
     전압 제어 이상기를 이용하여 360°의 연속적인 위상 제어를 실행하는 이상기에 있어서, 전압 제어 이상기의 위상 제어 범위를 360°을 넘는 소정의 범위로 하고, 전압 제어 이상기의 제어 전압을 불연속으로 전환할 때에, 위상을 증가시키는 경우의 제어 전압의 전환점과, 위상을 감소시키는 경우의 제어 전압의 전환점을 다른 것으로 함으로써 히스테리시스 특성을 가지게 하는 제어를 실행하는 위상 제어 방법이다. 
       
     위상 제어 방법, 무선 통신.
Patent KR-20070091384-A (KR)
Title: The system that prevent earthquake of building
Inventor: PARK MYUNG KON
IPC: E04H9/02
Filed: 2006-03-06
Abstract: A system for protecting a building from earthquake is provided to absorb vibrations of earthquake which may cause collapse of the building by mounting a spring device and a thrust wheel under a die and installing a suspension at the edge. A system for protecting a building from earthquake comprises a concrete pile(1), a die(2), a spring, a thrust wheel, a column, and a cylinder piston type suspension. A method for constructing the system comprises the steps of: setting the pile in the ground and installing the die for a primary earthquake prevention; attaching the cylinder piston type thrust wheel for supporting the building and a coil spring for preventing vibration to the die; setting the pile on the ground and connecting the square concrete column; fixing the cylinder piston type suspension and a bearing ball on a wall; forming a pipe, a wheel case, a steel wheel, a wheel shaft, and a ring plate; and attaching a hinge to the pipe.
Patent KR-20060031667-A (KR)
Inventor: LEE SEOK JIN
IPC: A23B7/01
Filed: 2006-03-23
Abstract: 본 발명은 농산물 건조기에서 송풍실의 공기 전환장치에 관한 것이며 발열히터와 송풍기가 설치되는 건조기에서 건조 초기에는 외부공기를 차단하고 내부공기를 순환시키면서 가열하여 고온 고습을 유지하고, 건조시에는 외부공기를 유입시켜 건조할 수 있는 송풍실의 공기 전환장치를 제공함에 목적이 있다. 
     본 발명은 송풍실의 바닥에는 타공을, 벽면에는 순환구를 형성하고 송풍실에 수납되어 바닥의 타공지점을 닫게 되면 벽면의 순환구가 열리고, 또 순환구가 닫히면 타공지점이 열릴 수 있도록 하여 송풍실의 유입 공기를 전환할 수 있도록 구성한 것이다. 
     이와 같은 본 발명은 농산물의 건조 초기에는 농산물에 함유하는 수분을 제거하고 농산물의 색도를 좋게 하기 위해 고온과 고습으로 익히는 공정을 수행하고  외부공기의 유입을 차단하고 내부공기를 가열하여 방풍 순환되고, 또 익히는 공정이 완료되면 외부공기를 유입하여 방풍하게 되므로 농산물의 건조 효율이 높고 색도와 건조 상태가 우수한 고품질의 농산물을 얻을 수 있게 되고 사용이 간편하게 되는 특징이 있다. 
       
     농산물 건조기, 순환구, 외부공기, 개폐판, 고온 고습
Patent KR-20060055489-A (KR)
Inventor: EGASHIRA KYOKO
IPC: H01L27/08
Filed: 2006-03-30
Abstract: 본 발명은 적은 공정 수로 MIM형 용량소자를 형성함과 동시에, 저항값의 편차 또는 기생저항이 적은 저항체를 갖는 반도체장치 및 그 제조방법을 제공하는 것이다. 
     반도체장치는, 기판상에 형성된 절연막(2) 상에, 아래쪽으로부터 차례로 적층된 금속장벽 막(6) 및 AlCu막(8) 및 TiN막(9)으로 이루어지는 배선(10ｂ, 10ｃ)과, 금속장벽 막(6)으로 이루어지는 용량 하부전극과, 용량 하부전극 상에 형성된 용량절연막으로서의 SiＯ 2 막(7)과, SiＯ 2 막(7) 상에 형성된 AlCu막(8) 및 TiN막(9)으로 이루어지는 용량 상부전극으로 구성되는 용량소자(10a)를 구비한다. 
       
     절연막, 배선, 용량 하부전극, 용량소자
Patent KR-20070024332-A (KR)
Title: Authentication processing method, authentication processing apparatus, and computer readable recording medium for recording authentication processing program
Inventor: SHIMIZU AKIHIRO
IPC: G06F21/31
Filed: 2006-03-30
Abstract: A method and a device for processing authentication, and a computer-readable recording medium storing an authentication processing program are provided to authenticate qualification of a user and a communication party, and apply to an information communication system or a key opening/closing system by improving stability of an authentication process. An obtainer(41) obtains present authentication information generated by a value from an authenticated device. A receiver(42) receives the first transmission information, which hides the next authentication information with the present authentication information, and the second transmission information, which hides the value with the next authentication information, from the authenticated device. A calculator(43) calculates the next authentication information by using the received first transmission information and the present authentication information of the obtainer, and calculates the value by using the next authentication information and the second transmission information. A determiner(44) authenticates the user based on the calculated value and the present authentication information.
Patent KR-20060106896-A (KR)
Inventor: OMI HIROMI
IPC: G06F3/0489
Filed: 2006-04-04
Abstract: 동작 모드로서, 기기로의 조작을 실행하는 조작 모드와, 기기로의 조작에 대응하는 설명을 제시하는 설명 모드를 가진 정보 처리 장치는, 설명 모드에서 이루어진 조작의 입력에 대해 설명을 제시하고, 조작의 입력을 기억한다. 그리고, 정보 처리 장치는 미리 정해진 제1 조작 입력에 따라 기억 수단에 기억된 조작의 입력에 따른 동작을 실행할 뿐만 아니라, 설명 모드에서 조작 모드로의 이행을 실행한다. 
       
     정보처리, 동작모드, 유저 인터페이스
Patent KR-20060107337-A (KR)
Inventor: REHM NORBERT
IPC: G11C29/00
Filed: 2006-04-05
Abstract: 메모리 어레이 내의 부동 워드 라인을 검출하도록 하는 디바이스 및 방법이 제공된다.  분리된 구동 라인을 가지는 각 측으로부터 로컬 워드 라인을 구동함에 의하여, 그 메모리 어레이의 일 측 상의 로컬 워드 라인이 미리 결정된 전압 레벨(예를 들어, V PP 과 V NWML  사이의 중간 전압 레벨)로 설정될 수 있다.  일 측 상의 로컬 워드 라인을 차단한 후에, 또 다른 측 상의 메모리 셀들이 판독 실패에 대하여 테스트될 수 있으며, 이는 그 일 측 상의 부동 워드 라인을 식별할 수 있다.
Patent KR-20070106223-A (KR)
Title: METHOD FOR PRODUCING alpha;-OLEFIN-ACRYLATE-NORBORNENE TERPOLYMERS USING LEWIS ACID AND THE TERPOLYMER PRODUCED HEREBY
Inventor: JUNG YOO YOUNG
IPC: C08F2/38
Filed: 2006-04-28
Abstract: A method for preparing an alpha-olefin-acrylate-norbornene terpolymer in the presence of a Lewis acid is provided to allow application of a mild condition of a low temperature and low pressure, and to obtain a desired terpolymer having easily controllable physical properties and a relatively high glass transition temperature. A method for preparing an alpha-olefin-acrylate-norbornene terpolymer comprises a step of polymerizing a monomer mixture containing an alpha-olefin, acrylate and norbornene in the presence of a Lewis acid by using a radical initiator. The Lewis acid comprises at least one metal cation selected from the group consisting of scandium, titanium, vanadium, chrome, manganese, iron, cobalt, copper, zinc, boron, aluminum, yttrium, zirconium, niobium, molybdenum, cadmium, rhenium and tin.