baber/WOPTO huggingface dataset:
Patent KR-20120095286-A (KR)
Inventor: RYU HEE WON
IPC: F24D3/12
Filed: 2011-08-26
Abstract: PURPOSE: An anti-freezing system using waste heat and frictional heat of water is provided to be precisely operated by installing a water temperature sensor. CONSTITUTION: An anti-freezing system connects indoor pipes and a faucet in series, and a loop pipe is built. The anti-freezing system comprises a flow meter(20), a boiler(106), a temperature sensor(30), and circulation pumps(104,108). The temperature sensor senses the temperature of water in pipes using the frictional heat of water and waste heat in a room. The temperature sensor senses is installed in a lower part of the boiler or the flow meter. The circulation pumps circulate the water in the loop pipe. The circulation pumps are installed in the rear part of the flow meter, and the lower and inner parts of the boiler.
Patent KR-20130024105-A (KR)
Title: Wind power generator having hollow main shaft with opening for maintenance
Inventor: CHON SEO HYEON
IPC: F03D11/00
Filed: 2011-08-30
Abstract: PURPOSE: An aerogenerator with a hollow main shaft having an opening for maintenance is provided to allow a worker to approach a blade through the opening of the hollow main shaft, thereby improving workability for maintenance. CONSTITUTION: An aerogenerator supported by a bearing includes a hollow main shaft(150) connected to a hub. An opening(155) for communicating the inside and the outside of the main shaft is formed on the wall of the main shaft. The smallest portion of the inner diameter of the main shaft is more than 70cm. The main shaft has a bearing mounting portion(151) on which the bearing is mounted, and an extended portion(154) which is extended from the bearing mounting portion in the opposite direction of the hub. The opening is placed on the extended portion. The hub is approachable from the opening because obstacles do not exist in a hollow portion inside the main shaft. The hub is formed to be approachable from the opening through the hollow portion inside the main shaft supported by the bearing.
Patent KR-20130026191-A (KR)
Title: Apron for dental patient
Inventor: IM DOO MAN
IPC: A61C19/02
Filed: 2011-09-05
Abstract: PURPOSE: An apron for a dental patient is provided to prevent the dental tools from being off a tray due to the leaned tray according to the patient body figure. CONSTITUTION: An apron for a dental patient comprises a cover member(110) which is prepared to cover dental patient's torso; a tray(120) which is installed to contain various dental tools for the dental treatment or procedure on the surface of the cover member, and to prevent the contained dental tools from being off; a supporting plate which supports the tray and is attached to the cover member in a detachable manner; and a height adjustment device which is equipped between the tray and the supporting plate, and controls the height of the tray. The height adjustment device has a connecting tool for connecting the tray and one side of the supporting plate; and a bellows equipped between the tray and the other side of the supporting plate.
Patent KR-20130028276-A (KR)
Title: Mobile terminal having mode transition function and driving method thereof
Inventor: SONG MIN A
IPC: G06F9/44
Filed: 2011-09-09
Abstract: PURPOSE: A mobile terminal including a mode conversion function and an operating method thereof are provided to perform automatic back-up and restoration without the organization of tasks by manipulating a UI(User Interface) for terminating unnecessary work. CONSTITUTION: A switch(230) generates a mode conversion signal. A mode performing and converting unit(250) performs one of modes according to a kind of an identified external connecting device. The mode performing and converting unit sequentially circulates and converts each mode for every conversion signal when receiving the mode conversion signal. A restoring unit(270) backs up one or more parts of tasks when converting one of the modes. The restoring unit restores the backed up tasks when converting another one of the modes. [Reference numerals] (100) Outer connecting device; (210) Connecting unit; (230) Switch; (250) Mode performing and converting unit; (270) Restoring unit
Patent KR-20130034799-A (KR)
Title: Multi direction input device
Inventor: OH EUI JIN
IPC: G06F3/033
Filed: 2011-09-29
Abstract: PURPOSE: A multi-direction input device is provided to sense push inputs which are more than the number of direction push sensors using a few of the direction push sensors. CONSTITUTION: A control unit(10) moves a direction and includes a center shaft(13) which prevents input errors generated by the rotation and breakaway of a direction push button. A multi-direction push unit(30) transmits a direction push input signal to the control unit and senses the direction push input of a direction push button. A multi-direction moving unit(50) transmits a direction moving input signal to the control unit by sensing the direction moving input of the control unit. A memory unit stores data corresponding to a program and the direction push input and the direction moving input. The control unit processes the inputs by extracting the data corresponding to a direction push input signal and a direction moving input signal.
Patent KR-20130035665-A (KR)
Inventor: PARK IN HO
IPC: H05K9/00
Filed: 2011-09-30
Abstract: 본 발명은 전자파 차폐룸용 도어에 관한 것으로서, 그 특징적인 구성은 전자파 차폐룸의 출입구를 개폐하도록 된 전자파 차폐룸용 도어에 있어서, 상/하 대칭으로 설치되며, 일단은 벽면으로부터 이격되고 타단은 출입구 측으로 근접되게 형성된 한 쌍의 가이드 레일(30); 상기 가이드 레일(30)에 슬라이딩 방식으로 이동되게 설치된 도어(100); 상기 도어(100)에는 각 도어를 개폐하는 개폐수단으로서, 도어(100)의 표면에 설치된 스위치(120); 상기 스위치(120)에 의해서 동작되도록 도어(100)에 내장된 한 쌍의 구동 실린더(140); 상기 도어(100)에 내장되게 설치된 회전축(131)을 매개로 회전 가능하도록 설치된 회전판(130); 상기 구동실린더(140)와 회전판(130)을 연결하는 구동로드(141); 상기 구동실린더(140)에 연결로드(151)를 매개로 연결되어 회전력을 분기시키는 두 쌍의 분기부재(150); 상기 분기부재(150)에 종동로드(152)를 매개로 연결된 8개의 걸쇠(160)를 포함하여 이루어지며, 상기 스위치(120)를 조작함에 따라 최종적으로 상기 8개의 걸쇠(160)는 출입구의 문틀(10)에 형성되는 걸림홈(12)에 삽입 또는 인출되면서 도어의 개폐가 이루어지도록 된 것이다.
Patent KR-20130035783-A (KR)
Title: Low-power wireless charging apparatus and method thereof
Inventor: YOON YOUNG SEOK
IPC: H02J17/00
Filed: 2011-09-30
Abstract: PURPOSE: A low power wireless charging device and a method thereof are provided to prevent unnecessary power consumption and to reduce the load of a main control part by periodically determining the existence of a receiver through a cheap auxiliary control part and operating the main control part only if the receiver exists. CONSTITUTION: Multiple primary coils(110) correspond to multiple receivers(200-1,...,200-n), and more specifically, correspond to each secondary coil(210-1,...,210-n) of the multiple receivers one-to-one. Multiple drivers(120) are connected to the multiple primary coils, and transmit detection signals of each receiver generated from a low power auxiliary control part(150). A sensing part(130) detects the current and voltage resulting from a changed magnetic field from at least one of the multiple primary coils by using the detection signals of each receiver transmitted through the multiple drivers. A comparator(140) compares the current and voltage detected from the sensing part with a predetermined setting value. The low power auxiliary control part determines the existence of the multiple receivers corresponding to the multiple primary coils, and if at least one receiver exists, generates a wakeup signal and provides the wakeup signal to a main control part(160). The main control part is powered on by receiving the wakeup signal according to the control of the main control part, and generates a wireless power signal for charging a corresponding receiver and transmits the wireless power signal to the corresponding receiver. [Reference numerals] (120-1) First driver; (120-2) Second driver; (120-n) n-th driver; (130) Sensing part; (140) Comparator; (152) Low power controller; (154) Auxiliary control signal generator; (162) Main controller; (164) Main control signal generator; (220-1,220-n) Rectifier; (230-1,230-n) Constant current circuit; (240-1,240-n) Battery; (AA) First receiver; (BB) n-th receiver;
Patent KR-20130040597-A (KR)
Title: Jet pump
Inventor: KANG CHEOL WOO
IPC: F02M37/00
Filed: 2011-10-14
Abstract: PURPOSE: A jet pump is provided to reduce fuel flow noise and to constantly supply fuel into a main tank from a sub tank. CONSTITUTION: A jet pump(10) comprises a suction unit(23), a nozzle unit(22), a supply unit(21), a return unit(24), an exhaust unit(25), and a fuel flow noise reduction unit(30). The suction unit is connected to a sub tank. The nozzle unit is connected to the bottom end of the suction unit. The diameter of the nozzle unit end narrows towards the bottom. The supply unit is formed around the nozzle unit. The diameter of the supply unit varies. The return unit is connected with one side of the supply unit for flowing fuel which is returned from a fuel tank into the supply unit. The exhaust unit is formed at the bottom end of the supply unit and supplies fuel which is returned from an engine and sucked from a main tank. The fuel flow noise reduction unit is mounted to the inner wall of the nozzle unit and varies the diameter of the nozzle unit through vertical movement.
Patent KR-20130039635-A (KR)
Title: Dredging apparatus
Inventor: KIM SANG HYAN
IPC: E02F3/92
Filed: 2011-10-25
Abstract: PURPOSE: A dredging device is provided to perform an effective dredging device by controlling a water suction amount depending on various dredging bottom surface environments. CONSTITUTION: A dredging device comprises a vacuum pump(20), a deposit suction hose(14), and a water suction hose(16). The deposit suction hose sucks a deposit on a bottom surface with a suction force of the vacuum pump. The water suction hose sucks water by being separated from the bottom surface at regular intervals. One end of the water suction force absorbs the water, and the other end is connected to the deposit suction hose. One end of the deposit suction hose sucks the deposit on the bottom surface, and the other end of the deposit suction hose is connected to the water suction hose. [Reference numerals] (AA) Main suction port; (BB) Blade; (CC) Power transmission unit; (DD) Chamber body; (EE) Excavation unit;
Patent KR-20120044264-A (KR)
Title: Liquid crystal aligning agent and liquid crystal display device
Inventor: SUZUKI KEIICHI
IPC: C08L83/04
Filed: 2011-10-26
Abstract: PURPOSE: A liquid crystal alignment agent is provided to have excellent crystal orientation, to have high light resistance, and to have low decline of voltage conservation rate in spite of light irradiation of high intensity, thereby forming a liquid crystal alignment film with excellent electrical properties. CONSTITUTION: A liquid crystal alignment agent comprises polyorganosiloxane having at least one kinds of structure selected from a group consisting of acetalester structure of carboxylic acid, ketal ester structure of carboxylic acid, 1-alkylcycloalkylester structure of carboxylic acid, and thirdly alkylester. The polyorganosiloxane has epoxy structure, and a light-aligning group. The liquid crystal alignment film contains at least one kind of polymer selected from a group consisting of polyamic acid and polyimide.
Patent KR-20130047796-A (KR)
Title: Transferring apparatus for fuel and raw material
Inventor: BAE GI YOUNG
IPC: B65G47/52
Filed: 2011-10-28
Abstract: PURPOSE: A fuel and raw material transfer device is provided to prevent the loss of fuel and raw materials from a belt conveyor by laminating the fuel and raw materials at the center part of the belt conveyor. CONSTITUTION: A fuel and raw material transfer device comprises a hopper(12), a guide panel(22), a horizontal driving part(140), and a vertical driving part(130). The hopper comprises an inlet and an outlet. The guide panel is installed in the hopper to be vertically moved and laterally rotated. The horizontal driving part controls a gap between the guide panel and the hopper. The vertical driving part controls the height of the guide panel.
Patent KR-20130046632-A (KR)
Title: Electriluminescent polymer containing benzothiadiazole derivatives and organoelectriluminescent device emloying the same
Inventor: JEONG HUN SEOB
IPC: C07D285/14
Filed: 2011-10-28
Abstract: PURPOSE: An electroluminescent polymer is provided to use a derivative as a benzothiazole derivative, thereby being utilized as a green light-emitting material with improved purity and improving luminous efficiency, driving voltage, and brightness performance of an organic electroluminescent device. CONSTITUTION: An electroluminescent polymer comprises a benzothiazole derivative represented by chemical formula 1. In chemical formula 1, Ar is C5-40 aromatic group or C4-40 heteroaromatic group with a heteroatom included in an aromatic ring thereof; the aromatic ring or heteroaromatic group can be substituted by C1-12 alkyl group, alkoxy group, or amine group; W can be substituted by the same or a different substituent which is C1-12 linear, branched, or cyclic alkyl group or C6-14 aromatic group; m is 0.01-1; and n is 0-0.99.
Patent KR-20130050172-A (KR)
Title: Self-supporting temporary structure using steel wire and method of the same
Inventor: CHO RAE SOO
IPC: E02D29/045
Filed: 2011-11-07
Abstract: PURPOSE: A self-supporting temporary structure using a wire and a construction method thereof are provided to improve safety of construction during the construction and to improve quality and work efficiency of a building by stably suppressing change of an exterior from external pressure. CONSTITUTION: A self-supporting temporary structure using a wire comprises an earth retaining member(10), a wire member(20), and a fastening unit(40). The earth retaining member is vertically installed on the ground and is connected to a wall of an excavation hole(5). One side of the wire member is fixed to the lower part of the earth retaining member, and the other side of the wire member is fixed by being extended towards the ground. The fastening unit fixes the wire member to be fastened in order to fix the earth retaining member from the wire member in a vertical direction.
Patent KR-20130051316-A (KR)
Inventor: YIM JUNG RYOUL
IPC: G06F3/041
Filed: 2011-11-09
Abstract: 본 발명의 터치 패널은 적어도 하나의 투명 기판; 및 상기 투명 기판의 일면 또는 양면에 다수의 단위 전극 라인을 포함하여 형성된 전극을 포함하고, 상기 전극은 상기 투명 기판으로부터 제 1 절연 패턴층, 금속 패턴, 및 제 2 절연 패턴층을 순차적으로 적층한 구조이다.  
또한, 본 발명의 터치 패널에서 상기 단위 전극 라인 사이의 경계 영역은 상기 금속 패턴이 길이 방향으로 서로 이격되고, 상기 제 2 절연 패턴층이 상기 금속 패턴을 매립한 것이다.  
본 발명의 터치 패널은 각각의 단위 전극 라인 사이를 구분하는 이격 영역을 절연층으로 연결하여, 이격 영역에 의한 선형 패턴 시인 및 모아레 현상을 방지하고, 이에 따라 터치 패널의 시인성을 개선시켜 터치 패널의 표시 품질을 향상시킬 수 있는 효과가 있다.
Patent KR-20130054823-A (KR)
Title: Dehumidification type air cleaner
Inventor: HONG HYUN JIN
IPC: B01D46/54
Filed: 2011-11-17
Abstract: PURPOSE: An air cleaner for a dehumidification type is provided to leak a clean air to an indoor after one more filtering a smell particle or a bacteria contained among an air passing through a dehumidification part by arranging a second filter part in a front of a dehumidification part. CONSTITUTION: An air cleaner for a dehumidification type comprises a housing; a first filter part(200); a dehumidification part(300); a second filter part(400); and a blower part(500). The first filter is arranged in one side of an inside housing, and filters a foreign substance among an air flowed into an inside housing through an influx part. The dehumidification part is arranged in a rear end of the first filter part and removes moisture among an air passing through the first filter part. The second filter part is arranged in a rear end of a dehumidification part and filters a foreign substance not filtered in the first filter part. The blower part is arranged in a rear end of the second filter part, and leaks a housing external air after flowing into an inside.
Patent KR-20130056519-A (KR)
Title: Apparatus and method for managing neighbor list in mobile communication system
Inventor: RYU YEON SU
IPC: H04W48/04
Filed: 2011-11-22
Abstract: PURPOSE: A neighbor list management device and a method thereof are provided to manage a neighbor cell list by using handover statistics. CONSTITUTION: A storage unit(730) stores a neighbor cell list including one or more cells. A control unit(750) adds one or more cells to a first list. The first list is a list for controlling a handover process. The control unit prohibits a handover process in one or more cells included in the first list. When new neighbor cell is detected, the control unit moves a cell having the lowest handover order in the second list to the first list. The second list allows the handover process. [Reference numerals] (710) RF processing unit; (720) Modem; (730) Storage unit; (740) Back-hole communication unit; (750) Control unit; (760) Wireless control unit; (770) Information collection unit; (780) Neighbor cell management unit; (782) Neighbor cell detection unit; (784) Priority determination unit; (786) Cell classification unit; (AA) Neighbor cell list; (BB) Handover statistical information
Patent KR-20130065803-A (KR)
Inventor: JOE WOO JIN
IPC: G06Q50/22
Filed: 2011-11-30
Abstract: 본 발명은 위치 기반 서비스(Location Based Service)를 이용한 광고 및 기부 시스템 및 방법에 관한 것으로서, 가맹점 위치 정보를 포함한 가맹점 정보를 관리서버로부터 수신하며, 상기 관리서버로 기부 신청 정보를 전송하는 사용자단말기; 가맹점 위치 정보를 포함한 가맹점 정보를 가맹점단말기로부터 수신하며, 상기 사용자단말기의 위치 정보를 검색하고, 가맹점 위치 정보를 포함한 가맹점 정보를 상기 사용자단말기로 전송하며, 별도의 협력서버로부터 기부 대상 정보를 전송받고 상기 사용자단말기로부터 기부 신청 정보를 수신하고, 상기 사용자단말기로 기부 현황 정보를 전송하는 관리서버; 및 가맹점 위치 정보를 포함한 가맹점 정보를 상기 관리서버로 전송하는 가맹점단말기;를 포함한다. 
본 발명에 따르면, 위치 기반 서비스를 활용하여 사용자 주변의 가맹점 정보를 모바일 어플리케이션 상에서 실시간으로 제공함으로써 광고주 입장에서는 저렴한 비용으로도 광고 효율을 높이고 사용자 입장에서는 편리하게 원하는 가맹점을 파악할 수 있는 효과가 있다.
Patent KR-20130062096-A (KR)
Inventor: CHIN SOO HYEON
IPC: A42B3/10
Filed: 2011-12-02
Abstract: 본 발명은 에어 백 장착형 안전모에 관한 것으로 특히, 반구 형상으로 성형한 헬멧의 내부에 충격 완충용 내피를 설치하고, 상기 헬멧의 저부에는 턱끈이 구비된 안전모에 있어서, 상기 헬멧의 내면과 충격 완충용 내피 사이에 에어 백을 설치하고, 상기 헬멧의 내부에는 수개의 충격감지센서를 정해진 간격을 두고 설치하며, 상기 헬멧의 뒷부분에는 상기한 수개의 충격감지센서 중 어느 하나에서라도 자체에 세팅된 충격력 이상이 감지되어 소정의 출력신호가 발생되면 순간적으로 상기 에어 백에 압축공기 또는 가스를 송급시켜 주는 에어 백 구동기를 부가 설치하고, 필요에 따라서는 상기 에어 백의 내측에는 에어 백의 작동시 공기 또는 가스에 의해 팽창된 에어 백이 반구 형상을 유지하도록 하는 형체 유지망을 더 설치하되, 상기 헬멧과 상기 형체 유지망 사이에는 수개의 형체 유지망 결속수단을 정해진 간격을 두고 설치한 것을 특징으로 한다. 
따라서, 헬멧을 통해 작업자의 머리로 전달되는 외부의 강한 충격력을 완충용 내피와 에어 백을 통해 2중으로 감쇄시킬 수 있어 각종 산업현장에서 작업자의 머리 및 목뼈 등이 입을 수 있는 치명적인 상해를 방지할 수 있음은 물론 안전모 자체의 제품성과 그 기능에 대한 신뢰도를 대폭 향상시킬 수 있으며, 또한 헬멧을 통해 가해지는 충격력이 충격감지센서에 의해 설정된 충격력 이상으로 강하여 에어 백이 순간적으로 부풀 때에도 팽창된 에어 백이 정해진 두께이상으로 부풀지 않는 범위 내에서 반구 형상을 유지하게 되므로 턱끈에 의해 작업자의 머리에서 벗겨지지 않는 상태를 갖는 안전모가 에어 백의 팽창 압력에 의해 작업자의 머리를 압박하거나 또는 턱끈이 작업자의 턱 또는 목 부분을 조이게 되므로 인한 2차 안전사고의 발생을 미연에 방지할 수 있는 것이다.
Patent KR-20130063623-A (KR)
Title: Water-soluble paint composition for plastics and method of manufacturing paint film using the same
Inventor: CHO YOUNG HO
IPC: C09D7/12
Filed: 2011-12-07
Abstract: PURPOSE: A water-soluble paint composition is provided to obtain excellent chemical resistance, scratch resistance, and soft texture without smells after drying a coating film, and to prevent cracking and erosion of a plastic component. CONSTITUTION: A water-soluble paint composition comprises 35-65 wt% of a non-chlorine olefin resin, 5-40 wt% of a polyurethane dispersion, 0.1-3 wt% of a moisturizing agent, 0.1-2 wt% of a foaming agent, 1-13 wt% of a quenching agent, 0.2-2 wt% of a tackifier, 0.1-5 wt% of a pigment, and 2-50 wt% of a solvent. A manufacturing method of a coating film comprises a step of spreading and drying the water-soluble paint composition on a plastic material; and a step of spreading and drying a top-coating paint composition.
Patent KR-20130065122-A (KR)
Title: Seat for vehicle
Inventor: PARK JANG SU
IPC: B60N2/90
Filed: 2011-12-09
Abstract: PURPOSE: A seat for a vehicle is provided to uniformly heat the entire area of a seatback and a seat cushion by utilizing the blowing function of a ventilation seat for heating. CONSTITUTION: A seat for a vehicle comprises a ventilation channel, a slab pad(9), and a heating wire(11). The ventilation channel is formed into a groove in a pad(3) to dispersedly flow air which is blown by a ventilation module(1). The slab pad is equipped with an outlet(7) for discharging air by connecting to a part of the ventilation channel and is overlapped in the pad. The heating wire is overlapped in the slab pad. The heating wire is arranged in the outlet into a relatively tight shape.
Patent KR-20130065388-A (KR)
Title: Anti roll system for vehicles
Inventor: JANG SUNG BAE
IPC: B60G21/05
Filed: 2011-12-09
Abstract: PURPOSE: An anti-roll system for a vehicle is provided to improve the drive and rotation stability of a vehicle by suppressing the roll of the vehicle in the roll generation of a large displacement. CONSTITUTION: An anti-roll system for a vehicle comprises a lower arm(1), a rotary mounter(3), a spring unit(5), and a push rod(7). The lower arm is mounted at both sides of a sub frame(9) through a mounting bush(MB) and is connected to one side of a knuckle(N). The rotary mounter is installed inside the central part of the sub frame. The spring unit comprises a streamlined flat spring(51), a sub spring(52), and a fastening yoke(53). The central part of the spring unit is rotatably arranged in the rotary mounter. The flat spring comprises a fastening part with a central fastening hole and a bolt hole at both ends thereof. The sub spring is separately arranged at both sides of the fastening part in the flat spring. The top of the fastening yoke fastens the flat and sub springs. The bottom of the fastening yoke is installed in the bearing of the rotary mounter. The push rod is connected in between both ends of the flat spring and each lower arm.
Patent KR-20130070670-A (KR)
Title: Automatic check of destination apparatas and method of using for face recognition in a portable terminal
Inventor: KIM KI YEUNG
IPC: H04B1/40
Filed: 2011-12-16
Abstract: PURPOSE: A device of a portable terminal and a method thereof are provided to automatically confirm the personal information matched with the selected face by recognizing the selected face from a user. CONSTITUTION: A control unit(601) recognizes the selected face. The control unit confirms the personal information of a person matched with the selected face. A communication module(605) transmits one or more content to a reception site indicated by the confirmed personal information. An input unit(602) receives one of the stored pictures. The input unit receives a command starting the face recognition of the selected personal picture. A display unit(603) displays one or more face areas included in the picture. [Reference numerals] (601) Control unit; (602) Input unit; (603) Display unit; (604) Storage unit; (605) Communication module; (606) Camera module
Patent KR-20130075060-A (KR)
Title: Method of manufacturing fe/cr substrate for solar cell
Inventor: Kim jin you
IPC: C25D3/20
Filed: 2011-12-27
Abstract: PURPOSE: A method of manufacturing a Fe/Cr substrate for a solar cell is provided for a chrome layer formed in both sides of an iron thin film to give a corrosion resistance to a substrate, and to prevent a decline of efficiency of a solar cell due to a diffusion of impurities by acting as a diffusion barrier about a substrate when used as a solar cell. CONSTITUTION: A method of manufacturing a Fe/Cr substrate for a solar cell comprises the following steps: an electrolyte including 0.1 g/ls to 4.0 g/l of at least a kind of a surfactant is supplied to one side or both sides of a conductive base plate (11); a current is applied to the conductive base plate acting as a cathode and an anode electrode equipped by separating in one side or both sides of the conductive base plate in order to attach an iron to the conductive base plate; an iron thin film is obtained by separating an iron deposition layer formed by attaching an iron; and a chrome layer is formed on both sides of the iron thin film.