baber/WOPTO huggingface dataset:
Patent KR-20070075326-A (KR)
Title: Weatherable steel sheet having superior toughness in weld heat-affected zone
Inventor: OHNISHI HIROMICHI
IPC: C22C38/00
Filed: 2007-01-10
Abstract: A high strength weatherable steel sheet which improves weldability and heat-affected zone toughness to the utmost, exhibits excellent weatherability, and has a tensile strength of 570 MPa or more is provided. A steel sheet comprises, by mass percent, 0.01 to 0.08% of C, 1.0% or less of Si, 0.5 to 2.0% of Mn, 0.05% or less of P, 0.01% or less of S, 0.01 to 0.07% of Al, 0.1 to 1.5% of Cu, 0.2 to 2.0% of Ni, 0.3 to 2.0% of Cr, 0.005 to 0.03% of Ti, 0.0005 to 0.005% of Ca, 0.0020 to 0.0080% of N, 1.0% or less of Mo, 0.003% or less of B, and 0.2% or less of V with a W value prescribed by the following mathematical expression 1 satisfying 1.0 or less, and a Y value prescribed by the following mathematical expression 2 satisfying 1.0 or less, and the steel sheet has a structure containing a bainite fraction of 90 area % or more: [Mathematical Expression 1] W=1.3/{-0.1[Mn]+3[Cu]2.5[Ni]+0.6[Mo]+0.3[Cr]+0.1}^0.5 where [Mn], [Cu], [Ni], [Mo] and [Cr] represent contents(mass%) of Mn, Cu, Ni, Mo and Cr, and [Mathematical Expression 2] Y=PCM/{0.18+0.02[([TS]-570)/100]^2} where PCM is a value(mass%) obtained by the following mathematical expression 3, and [TS] indicates an actually measured tensile strength value: [Mathematical Expression 3] PCM=[C]+[Si]/30+[Mn]/20+[Cu]/20+[Ni]/60+[Cr]/20+[Mo]/15+[V]/10+5[B] where [C], [Si], [Mn], [Cu], [Ni], [Cr], [Mo], [V] and [B] represent contents(mass%) of C, Si, Mn, Cu, Ni, Cr, Mo, V and B.
Patent KR-20080069789-A (KR)
Title: Broadcast receiver and method for authentication of copy protection
Inventor: LEE SANG BAEK
IPC: H04N21/6334
Filed: 2007-01-24
Abstract: A broadcast receiver and a method for authenticating CP(Copy Protection) are provided to improve a transfer speed in changing to a CA(Condition Access) channel or to a CP channel by reducing an authentication time. A cable head end(130) receives Internet contents(111), video contents(112) and contents(113) of another source from respective program providers and discriminately allocates a certain frequency band to thus multiplex, modulates and transmits the frequency band. A CAS(Condition Access System)(120) gives authority to allow only viewers who have subscribed to view paid broadcasts. A network operating unit(133) provides a cable broadcast and a high speed Internet service via an HFC(Hybrid-Fiber Coaxial). A cable card(140) and a host(150) receive a paid digital cable broadcast service, processes CA according to a user class, and encrypts it for CP. The host obtains an encryption key to decrypt a transport stream encrypted for CP, and decodes the encrypted stream.
Patent KR-20070043730-A (KR)
Inventor: NISHIZAWA HIROTAKA
IPC: H05K1/11
Filed: 2007-02-12
Abstract: IC 카드(MC2)는 반도체집적회로 칩(4, 5A)이 실장되어 복수개의 커넥터 단자(2)가 형성된 카드기판(1A)을 가지고, 상기 커넥터 단자를 케이싱에서 노출한다. 커넥터 단자는 IC 카드 삽입방향의 전후에 서로 인접하는 열 상호간에서 격자모양으로 복수열 배치된다. 격자모양 배치를 채용함으로써, 카드소켓의 소켓단자의 돌출량을 바꾸어 종(縱)일열로 배치하는 비교적 간단하게 구성을 채용할 수 있다. 하위 IC 카드의 커넥터 단자 배열을 그대로 특정의 커넥터 단자열로 채용하여, 이것에 대해 격자모양의 별도의 커넥터 단자 배열에 상위 IC 카드 전용의 기능을 할당하면, 하위 호환도 용이하게 실현 가능하게 된다. 
       
     컨트롤러 칩, 플래시 메모리 칩, 소켓단자, 메모리 카드
Patent KR-20080076234-A (KR)
Title: Non-volatile memory device and fabrication method thereof
Inventor: LEE MYUNG SHIK
IPC: H01L21/8247
Filed: 2007-02-15
Abstract: A non-volatile memory device and a fabrication method thereof are provided to form a memory cell at both an active region and an isolation region by contacting a second conductive layer with each first conductive layer at an active region and an isolation region. A non-volatile memory device comprises a gate electrode, an isolation layer(120), and a junction region. The gate electrode is formed at the bottom of a trench(108) in an active region and an isolation region on a semiconductor substrate(100), including a tunnel insulation layer(110), an electron storing layer(112), a blocking oxide layer(114), and first and second conductive layers(118,116). The isolation layer fills the trench and has a contact hole(122), which exposes a part of the surface of the first conductive layer. The junction region is formed between the gate electrodes of the active region and isolation region. The second conductive layer contacts the first conductive layer of the active region and isolation region through the contact hole.
Patent KR-20080076504-A (KR)
Title: Lamp
Inventor: LEE KEON YOUNG
IPC: H05B41/00
Filed: 2007-02-16
Abstract: A lighting apparatus is provided to minimize influence of heat generated from LEDs(Light Emitting Diode) by including a PTCR(Positive Temperature Coefficient Resistor) with a variable resistance characteristic. A lighting apparatus includes a power supply(110), a plurality of LEDs(130), and a variable resistor(140). The plurality of LEDs emit light by the power supply. The variable resistor is electrically connected between the power supply and the LEDs and has resistance varied by heat generated from the LEDs. A resistor(120) to restrict current applied to the LEDs or a capacitor to restrict the current applied to the LEDs without loss is installed between the power supply and the LEDs.
Patent KR-20080077745-A (KR)
Title: An air pressure
Inventor: KIM YONG WON
IPC: F99Z99/00
Filed: 2007-02-21
Abstract: An air blasting apparatus is provided to perform continuously percussion, compression and rotation by forming a first sliding groove of guiding a percussion lever on an inner wall of an outer sleeve and a sliding groove extending from an ending point of the first sliding groove to a point from which the percussion lever moves. An air blasting apparatus comprises a pressurizing member equipped with an elastic member, a percussion member and a transferring member. The pressurizing member includes a pressurized air room bound around a shaft(III), an outer sleeve(I) of wrapping the pressurized air room, a percussion lever and a first slide groove(162) of guiding the percussion lever. The percussion member has a second slide groove(161) extending from an ending point of the first sliding groove to a point at which the percussion lever is disposed between air is pressurized. The transferring member connects a transferring apparatus to a pipe.
Patent KR-20080097256-A (KR)
Title: The remote chasing system applied rfid for a missing child
Inventor: PARK CHANG YEONG
IPC: G06K17/00
Filed: 2007-02-26
Abstract: A remote chasing system applied RFID for a missing child is provided to wear a bracelet to a child and transmit the location information using video cameras which are installed place by place, thereby finding missing child easily. A dotard or a child wear a bracelet having an RFID chip, and RFID readers are installed to video cameras place by place. When the dotard or the child moves, the RFID reader in the camera receives wireless signal which is transmitted from the bracelet. If it is notified that the dotard or the child is lost, a guardian pursuits the dotard or the child's location using his mobile phone. If the child or the dotard pushes an emergency button on his bracelet, the location information of the child or the dotard is automatically transmitted to the guardian and police officer.
Patent KR-20080079825-A (KR)
Title: Method and system for providing push to talk service in a communication system
Inventor: JANG HYUNG SUK
IPC: H04B7/26
Filed: 2007-02-28
Abstract: A PTT(Push To Talk) service supply method in a communication system and a system therefor are provided to offer a PTT service according to a terminal's request, when the terminal does not want to generate a new session while the terminal wants to participate in an ongoing session only. A server receives an invite message for demanding participation in the currently ongoing group session from a terminal(901). The server checks whether the currently ongoing group session exists in a PoC(PTT over Cellular) communication system(903). If so, the server transmits a 2000K message to the terminal to accept the demand of participating in the group session(905). If the group session does not exist, the server checks whether a join-only message is inserted into the invite message(907). If so, the server sends a 404 Not Found message to the terminal to reject the demand(909).
Patent KR-20070034558-A (KR)
Title: 자동변속기 차량용 왼발 운동 기구
IPC: A63B23/10
Filed: 2007-03-08
Abstract: 자동변속기 차량용 왼발 운동 기구가 개시된다. 본 발명에 따른 자동변속기 차량용 왼발 운동 기구는 후방 일측의 양단에 수직으로 부설되어 제1 회전축(10')이 관통하는 제1 관통홀(100)이 적어도 바닥으로부터 1cm 이상 이격되어 형성되어 있는 제1 회전축 고정부(102)를 구비하는 하부판(10)과, 후방 일측에 제2 관통홀(120)을 구비하여 상기 제2 관통홀(120)을 통해 제1 회전축(10')이 관통함으로써 상기 하부판(10)과 결합되는 상하운동판(12)과, 상기 하부판(10)의 전방 일측과 상하운동판(12)의 전방 일측 사이에 가설되어 상기 상하운동판(12)이 상기 제1 회전축(10')을 중심으로 상하로 복원력을 제공하는 제1 스프링(13)과, 상기 제1 회전축(10')과 수직을 이루는 제2 회전축(20')에 의하여 상기 상하운동판(12)과 결합되는 좌우운동판(14)과, 좌측 단부에는 상방으로 연장되어 왼발의 이탈을 방지하기 위한 제1 연장부(162)를 구비하고 후방 단부에는 하방으로 연장되어 신발의 뒷축 걸림을 방지하기 위한 제2 연장부(164)를 구비하며 상기 제2 회전축(20')과 수직을 이루는 제3 회전축(30')에 의하여 상기 좌우운동판(14)과 결합되는 전후운동판(16), 및 일측은 상기 전후운동판(16)의 전방 일측에 고정되고 타측은 하부판(10)의 후방 일측에 고정되어 상기 전후운동판(16)이 수평을 이루도록 탄성을 제공하는 제2 스프링(18)을 포함하는 것을 특징으로 한다. 
     본 발명에 따른 자동변속기 차량용 왼발 운동 기구는 자동 변속기 차량의 바닥에서 왼발을 올려 놓게 되는 풋 레스트(foot rest) 부근에 부착 방식으로 설치되 어 왼발을 올려 놓고 상하와 전후 및 좌우 방향으로 관절 및 근육의 운동을 유도함으로써 관절 운동 효과와 함께 혈행을 원활히 하여 왼발 및 왼다리의 운동 부족 증상을 해소하고 특히 장시간 운전시 발생할 수 있는 왼발의 무력감 증상을 해소할 수 있다. 
       
     자동변속기 차량, 왼발, 왼다리, 운동기구, 무력감
Patent KR-20080084056-A (KR)
Inventor: SHIN JONG CHEOL
IPC: H01L27/146
Filed: 2007-03-14
Abstract: An image sensor and a manufacturing method thereof are provided to offset a variation of a threshold voltage by controlling regularly an overlapped area between a transfer gate electrode and a threshold voltage control region and an overlapped area between the transfer gate electrode and a photoelectric conversion element. A transfer gate electrode(132) is formed at an upper part of a photoelectric conversion element(110). A threshold voltage control region(136) is formed between the photoelectric conversion element and the transfer gate electrode. One end of the threshold voltage control region positioned at the transfer gate electrode is arranged in one end of the photoelectric conversion element in the threshold voltage control region. A charge detection unit(120) are isolated from the photoelectric conversion element and the threshold voltage control region.
Patent KR-20080084421-A (KR)
Inventor: KIM YOUNG SIK
IPC: H01L21/027
Filed: 2007-03-16
Abstract: A method for forming a fine pattern of a semiconductor device is provided to prevent not-open of the pattern by etching lower layers through a silylation layer as an etch mask. A method for forming a fine pattern of a semiconductor device includes the steps of: forming an etched layer(310), an insulation layer(320), a multi-function hard mask layer(340), and a photoresist layer pattern on a semiconductor substrate(300); exposing the multi-function hard mask exposed by the photoresist layer pattern; forming a silylation layer(360) on the exposed part of the multi-function hard mark layer through a silylation process; removing the photoresist pattern; and forming the fine pattern by etching the multi-function hard mask layer, the insulation layer, and the etched layer by using the silylation layer as an etch mask.
Patent KR-20080085964-A (KR)
Inventor: HONG YOUN GEOL
IPC: B01D46/00
Filed: 2007-03-21
Abstract: 본 발명에 따른 엘리베이터용 공기청정기는 전방면에는 공기흡입구가 형성되고 상측면에는 공기배출구가 형성된 청정기본체와, 상기 청정기본체의 공기흡입구측 내부에 설치되어 공기흡입구측으로부터 흡입되는 공기에 포함된 오염물질이 제거되도록 다수의 필터를 설치하여 구성된 필터군과, 상기 필터군의 후방에 설치되고 내부에 흡기팬이 구비되어 공기흡입구를 통해 흡입된 공기가 필터군을 통과하고 공기배출구로 배출되도록 하는 송풍기와, 상기 송풍기와 공기배출기사이에 설치되고 내부에 소정 갯수의 UV 살균램프가 설치된 살균박스를 포함하는 엘리베이터용 공기청정기에 있어서, 상기 살균박스는 스폰지 형태로 성형되고 그 표면에 이산화티타늄의 광촉매가 코팅된 광촉매코팅층이 구비되어,  엘리베이터내의 공기중에 포함된 각종 오염물질을 확실하게 제거할 수 있게 되어 쾌적하고 편리하게 엘리베이터를 이용할 수 있다.
Patent KR-20070097353-A (KR)
Title: Scroll fluid machine
Inventor: ISHIZUKI YUKI
IPC: F04C18/02
Filed: 2007-03-27
Abstract: A scroll fluid machine is provided to fix a holding plate to a holder more firmly by arranging a plurality of ears on a straight line between centers of an orbiting scroll and the holder, and to reduce a diameter of the orbiting scroll and make a housing small by preventing the ears from being protruded from an outer circumference of the orbiting scroll. A scroll fluid machine comprises a housing(1), a driving shaft(4), a fixed scroll(33), an orbiting scroll(5) and a self-rotation-preventing device(9). The driving shaft has an eccentric axial portion. The fixed scroll is fixed to the housing. The orbiting scroll is rotatably secured around the eccentric axial portion of the driving shaft, the orbiting scroll engaging with the fixed scroll to form a compression chamber between the fixed and orbiting scrolls. The self-rotation-preventing device allows the orbiting scroll to revolve while the device prevents the orbiting scroll to rotate on its own axis, the self-rotation-preventing device comprising a pair of holders(82) one of which is fixed in the housing.
Patent KR-20080088820-A (KR)
Title: Ｌｅｄ 램프와 이를 구비한 백라이트 유닛
Inventor: JANG HYUN WOO
IPC: H01L33/00
Filed: 2007-03-30
Abstract: 본 발명은 생산비를 절약할 수 있고, LED 램프의 열전도 성능을 향상시킬 수 있으며, LED 램프에서 백라이트 유닛의 광산란 수단까지의 거리를 확보하기에 알맞은 LED 램프와 이를 구비한 백라이트 유닛을 제공하기 위한 것으로, 이와 같은 목적을 달성하기 위한 백라이트 유닛은, 커버 바텀과; 상기 커버 바텀의 소정영역이 드러나도록 복수개의 홀이 구비되어 구성된 인쇄회로기판과, 상기 인쇄회로기판의 각 홀에 의해 드러난 상기 커버 바텀 상부에 배치된 열전도 패드와, 상기 열전도 패드 상부에 LED 칩이 실장된 LED 바디부와, 상기 LED 칩을 감싸도록 포탄형으로 형성된 광학렌즈와, 상기 LED 칩의 양단에 연결되며, 상기 인쇄회로기판에 부착된 캐소드 리드선 및 애노드 리드선을 포함한 매트릭스 형상으로 구성된 복수개의 LED 램프들과; 상기 LED 램프들의 상부에 구성된 광 산란 수단을 포함함을 특징으로 한다.  
       
     LED, 인쇄회로기판, 플라스틱
Patent KR-20080067554-A (KR)
Title: Pt/ru alloy supported catalyst, manufacturing method thereof, and fuel cell using the same
Inventor: PAK CHAN HO
IPC: H01M4/86
Filed: 2007-04-04
Abstract: A platinum/ruthenium alloy-supported catalyst is provided to realize excellent resistance against carbon monoxide and methanol oxidation capability, thereby imparting improved quality to a fuel cell. A platinum/ruthenium alloy-supported catalyst is obtained by the method comprising the steps of: (a) providing a platinum precursor and a ruthenium precursor, dissolving each precursor into a first solvent, and mixing the two solutions to provide a metal salt solution; (b) adjusting the pH of the metal salt solution to a desired range; (c) heat treating the resultant product to obtain a catalyst colloid; (d) mixing a catalyst carrier with a solvent to obtain a carrier solution; (e) mixing the catalyst colloid obtained from (c) with the carrier solution obtained from (d) to provide a mixed solution; (f) adjusting the pH of the mixed solution of (e) to 1-5 so that the catalyst particles are supported on the catalyst carrier to obtain a supported catalyst; (g) separating and washing the supported catalyst; and (h) heat treating the resultant supported catalyst under mixed reductive gas atmosphere containing hydrogen gas.
Patent KR-20070103305-A (KR)
Title: Method for separating protective tape and apparatus using the same
Inventor: YAMAMOTO MASAYUKI
IPC: H01L21/302
Filed: 2007-04-17
Abstract: A method for separating a protective tape and an apparatus using the same are provided to separate the protective tape from a semiconductor wafer by adhering a separation adhesive tape to the protective tape and separating the separation adhesive tape from the protective tape. A method for separating a protective tape includes the steps of: hanging a separation member(49) at a periphery of the protective tape and separating at least a part of the periphery of the protective tape; moving a semiconductor wafer(W) and an attaching member while pressing a separation adhesive tape by the attaching member to attach the separation adhesive tape to the protective tape; and moving the semiconductor water(W) and the attaching member in a protective tape surface direction in order to separate the separation adhesive tape and the protective tape from a surface of the semiconductor wafer(W).
Patent KR-20080095352-A (KR)
Title: Secondary battery with high capacity and longevity comprising silazane-based compound
Inventor: SON MI YOUNG
IPC: H01M10/0561
Filed: 2007-04-24
Abstract: A secondary battery is provided to minimize the side reaction between a positive electrode and electrolyte by using a silazane-based compound capable of forming passivation film on the positive electrode in the normal operation voltage region of battery, thereby improving high capacity and lifetime. A battery electrolyte including an electrolyte salt and electrolytic solvent comprises a silazane-based compound containing one or more silane groups and nitrogen as a compound capable of forming a passivation film by reacting in battery electrochemically. The silazane-based compound includes at least two silane groups in itself and they are linked with the nitrogen.
Patent KR-20080096197-A (KR)
Title: Method of producing forgings having excellent tensile strength and elongation from steel wire rods
Inventor: YUN TE CHANG
IPC: C21D1/00
Filed: 2007-04-27
Abstract: A method for manufacturing forgings is provided to have the toughness and hardness of the extent forgings to 160 kgf / mm^2 and have elongation ratio to 16 ~ 21 % form a steel wire rod. A method for manufacturing the forgings having high tensile strength and high elongation ratio is comprises (a) a step for forming forgings(4) from the steel wire bar(3); (b) a step for heating to the temperature range of 830 ~ 900 deg.C the forgings; (c) a step for a first tempering the forgings at range of 100 ~ 300 deg.C after heating at 830 ~ 900 deg.C; and (d) a step for a second tempering the forgings at range of 300 ~ 400 deg.C after the first tempering.
Patent KR-20090001722-A (KR)
Title: System for multi-managing a planning schedule in real time
Inventor: JU SANG GYU
IPC: H04W4/12
Filed: 2007-05-14
Abstract: A real-time multi schedule management system is provided to prevent delay of treatment or occurrence of accidents by managing complicated radiation therapy plan schedule. At least one task undertaking terminal(100) modifies task progressing schedule. An integrated schedule guide terminal(400) reflects the task progressing schedule in real time, and outputs the reflected schedule. A schedule management server(500) updates of the task progressing schedule through connection with the task undertaking terminal and the integrated schedule guide terminal, and executes a processing function including message transceiving and user authentication processes in accordance with each task, to realize real-time monitoring for the task progressing schedule.
Patent KR-20080059013-A (KR)
Title: Manufacturing method of electrode, plasma display panel and manufacturing method thereof
Inventor: TERAO YOSHITAKA
IPC: H01J11/32
Filed: 2007-05-21
Abstract: A method for manufacturing an electrode, a plasma display apparatus, and a method for manufacturing the plasma display apparatus are provided to stably form the electrode by forming a width of an end region of a groove greater than a width of a fine line thereof. A barrier rib layer(118) is formed to cover a substrate. A plurality of slots(c) having a line shape are formed on the barrier rib layer. An electrode material of a paste shape is filled on the respective slots from an end of each of the slots. Each of the slots is configured by an end region being a starting point of the filling of the electrode material and a fine line region except for the end region. A width(alpha) of the end region is greater than a width(beta) of the fine line region. A plurality of terminal electrodes being electrically connected to the electrode material filled in the slots are formed on the substrate in advance. The end region of the slot is formed to expose a portion of the terminal electrode.
Patent KR-20080105335-A (KR)
Title: Motor driver system and controlling method for the same
Inventor: WON JUNE HEE
IPC: H02P21/00
Filed: 2007-05-30
Abstract: A motor driver system and controlling method for the same is provided to prevent a current angel from being increased more than necessary when the motor is operated in low field magnet. In a motor driver system and controlling method for the same, an inverter(20) supplies three phase voltage to the motor and drives the motor. An inverter driving unit(200) generates a commanded voltage and output it to the inverter to follow the speed of the motor. The inverter controls an instruction angle of dequeue axis to be out of a set value when the motor is driven at weakling field domain. The inverter drive comprises a Q-axis current controller(220), a Q-axis volume control IC(210), and a D-axis volume control IC(230).
Patent KR-20080003215-A (KR)
Title: Supercooling apparatus
Inventor: KIM SU CHEONG
IPC: F25B40/02
Filed: 2007-06-04
Abstract: A supercooling device is provided to maintain super-cooled state of an object in low temperature by forming an insulation member and generating an electric field to a receiving space. A supercooling device comprises an insulation member(20b), a cooling cycle, and an electode unit. The insulation member has a receiving space inside wherein an object is received. The cooling cycle cools down the receiving space. The electrode unit is mounted in the receiving space. The electrode unit is shaped as a planar plate and of which one end is mounted at one surface of the insulation member. The electrode unit is separated at predetermined distance from at least a pair of symmetrical side surfaces of the insulation member.
Patent KR-20070077165-A (KR)
Title: Lithographic apparatus
Inventor: KEMPER NICOLAAS RUDOLF
IPC: H01L21/027
Filed: 2007-06-26
Abstract: A lithographic apparatus is provided to project a pattern from a patterning device into a substrate using a projection system and to eliminate a liquid from the vicinity of the substrate. A liquid supply system is arranged to supply a liquid to a space between a projection system(PL) and a substrate(W). A conduit has an open end adjacent a volume in which liquid is present. A porous member is interposed between the end of the conduit and the volume. A suction device is arranged to create a pressure differential across the porous member. The volume is adjacent a space comprising the liquid through which the patterned beam is projected.
Patent KR-20090003967-A (KR)
Title: Method for extracting biobutanol using ionic liquid
Inventor: UM YOUNG SOON
IPC: C12P7/16
Filed: 2007-07-06
Abstract: A method for separating biobutanol by using an ionic liquid is provided to improve environmental friendliness by using a hydrophobic ionic liquid instead of a volatile organic compound solvent. A method for separating biobutanol by using an ionic liquid comprises the steps of culturing the Clostridium bacteria in a culture fluid by anaerobic culture to obtain the culture solution containing butanol; and extracting butanol from the culture solution containing butanol by using a hydrophobic ionic liquid as an extraction solvent. Preferably the cation of the hydrophobic ionic liquid is based on imidazole.
Patent KR-20090006645-A (KR)
Title: Liquid flame retardant composition for synthetic leather to which reactive flame retardant and cyclophosphate flame retardant are added and method of preparing the same
Inventor: KIM HAN BYUNG
IPC: C09K21/02
Filed: 2007-07-12
Abstract: A liquid flame retardant composition for synthetic leather is provided to ensure enough flame retardant effect and excellent long-term storage property and to minimize the plasticity. A method for manufacturing a liquid flame retardant composition for synthetic leather comprises (S1) a step for synthesizing the urethane solution by adding a reactive flame retardant 5-15 weight% based on a polyol and reacting the polyol, isocyanate and solvent; and (S2) a step for adding a cyclophosphate-based flame retardant 5-10 weight% and dimethymethylphosphate 5-10 weight% to the synthesized urethane solution 80-90 weight%.