baber/WOPTO huggingface dataset:
Patent KR-20100030730-A (KR)
Title: Warm water storing system with wasted heat from engine
Inventor: SUK JIN HO
IPC: F28D15/00
Filed: 2008-09-11
Abstract: PURPOSE: A warm water storage apparatus using waste heat from an engine is provided to supply a small amount of warm water to a working site using construction machinery in a winter time and to control flux using a valve and a hose. CONSTITUTION: A warm water storage apparatus using waste heat from an engine comprises a hot water tank(30), a cooling water supply hose(13), and a cooling water collection hose(16). The hot water tank comprises a heating tube, a cap(25), a valve(26), and a hose. One side of the heating tube is welded with the cooling water supply pipe and the other side is welded with the cooling water collection pipe. The cap comprises an air deflating pipe. The air deflating pipe blocks up an inlet which injects water. The water heat-exchanged through the valve and the hose is exhausted. One side of the cooling water supply hose is connected to the cooling water supply pipe projected from one side of the hot water tank and the other side is connected to a cooling water supply port(11) of an engine block(10). One side of the cooling water collection hose is connected to the cooling water collection pipe projected from the other side face of the hot water tank and the other side is connected to a cooling water collection port(15) of a radiator or a water pump(14) installed at the engine block.
Patent KR-20100032654-A (KR)
Title: Method for fabricating organic thin film transistor and organic thin film transistor using the same
Inventor: KIM DO HWAN
IPC: H01L29/786
Filed: 2008-09-18
Abstract: PURPOSE: A manufacturing method and an organic thin film transistor manufactured with that of the organic thin film transistor process the gate isolation layer as the one-pot reaction using the self-assembled monolayer forming compound. The crystal orientation of the organic semiconductor can be controlled. CONSTITUTION: A surface of source/drain electrodes(50, 60) and a gate isolation layer(40) are the UV ozone treatment and the metal oxide layer(10) is formed on a source/drain electrode. The self-assembled monolayer precursor and solvent are impregnated in a solution including and the self-assembled monolayer is formed the gate isolation layer and source/drain electrode in the gate isolation layer and source/drain electrode. It makes investigate to the lamp having power for the half an hour to 60 minutes and it operates.
Patent KR-20100033279-A (KR)
Inventor: JEONG BYOUNG CHEON
IPC: H04B1/38
Filed: 2008-09-19
Abstract: 본 발명은 상대 슬라이딩 가능하도록 서로 연결되는 제1 및 제2 슬라이드 부재와, 일측에서 상기 제1 또는 제2 슬라이드 부재와 각각 결합하고 타측에서 상대 이동가능하도록 서로 결합하는 제1 및 제2 암 부재, 및 상기 제1 및 제2 암 부재의 상대이동에 의하여 상기 제1 및 제2 슬라이드 부재 중 어느 하나에 탄성력을 가하도록 형성되는 탄성력 제공부를 포함하는 슬라이드 모듈 및 그를 구비하는 휴대 단말기를 제공한다.
Patent KR-20100034175-A (KR)
Title: Vibration absorber for turning machining of crank shaft journal
Inventor: CHU SOO UK
IPC: B23B5/18
Filed: 2008-09-23
Abstract: PURPOSE: A vibration absorber for the turning of a crank shaft journal is provided to reduce machining time by increasing the rotation speed of the crank shaft and prevent vibration and noise due to contact of the vibration absorber and a jig. CONSTITUTION: A vibration absorber(11) for the turning of a crank shaft journal comprises an inner ring(6) and an outer ring(10). The inner ring fixes a height-adjustable fixing member(9) on a journal. The journal turns on the outline of the center of rotation. The fixing member is vertically opened and closed and is projected. The guide groove is formed on the circumferential edge of the inner ring. The guide groove is coupled with the combining projection of an outer ring. The guide groove surface-contacts with the outer ring so that the inner ring may slide.
Patent KR-20100034849-A (KR)
Title: The freemix to make rice noodles and the rice noodles and the making method thereof
Inventor: KIM GI SEON
IPC: A23L7/104
Filed: 2008-09-25
Abstract: PURPOSE: Premix for rice noodles and rice noodles using rice flour and a manufacturing method thereof are provided to increase viscosity and elasticity of the rice noodles by mixing and manufacturing the noodles with organic acid, the saccharides and starch with a specific ratio. CONSTITUTION: A manufacturing method of rice noodles comprises a step for mixing rice flour 60 ~ 120 parts by weight, refined salt 4 ~ 8 parts by weight, a thickening agent 1.96 ~ 4.73 parts by weight, organic acid 0.11 ~ 0.22 parts by weight, a pH maintaining agent 0.07 ~ 0.15 parts by weight, saccharides 0.66 ~ 2.1 parts by weight, arch 3.2 ~ 10.8 parts by weight and vital wheat gluten 2 ~ 6 parts by weight. The thickening agent includes sodium caseinate 0.2 ~ 0.5 parts by weight, propylene glycol alginate 0.02 ~ 0.05 parts by weight, sodium alginate 0.3 ~ 0.6 parts by weight, xanthangum 1.2 ~ 3.0 parts by weight, and sodium polyacrylate 0.04 ~ 0.08 parts by weight. The organic acid includes adipic acid 0.02 ~ 0.04 parts by weight, anhydrous citric acid 0.05 ~ 0.1 parts by weight and sodium citrate 0.04 ~ 0.08 parts by weight.
Patent KR-20100036554-A (KR)
Inventor: LEE SEUNG KYU
IPC: G06Q50/16
Filed: 2008-09-30
Abstract: 본 발명은 환경성 검토를 위한 부동산 입지 분석 서비스 제공 방법에 관한 것으로서, 보다 구체적으로는 특정 부동산에 대한 사업 가능 여부를 확인하고자 하는 이용자가 인터넷을 포함하는 통신망을 통하여 접속할 수 있는 부동산 입지 자동 분석 서버에 있어서, 환경성 검토에 기초하여 부동산 입지 자동 분석 서비스를 제공하는 방법으로서, (1) 이용자 단말기로부터 환경성 검토를 필요로 하는 대상지 정보를 입력받는 단계; (2) 상기 입력받은 대상지에 대한 관련 정보를 취합하는 단계; (3) 상기 취합된 정보를 바탕으로 환경성 검토 항목별로 분석하는 단계; (4) 상기 분석된 결과를 이용하여 사업 가능 여부를 판단하는 단계; 및 (5) 상기 판단한 예상 결과를 상기 이용자 단말기로 제공하는 단계를 포함하는 것을 그 구성상의 특징으로 한다. 
     본 발명의 환경성 검토를 위한 부동산 입지 분석 서비스 제공 방법에 따르면, 특정 대상지에 대하여 법령 또는 지자체의 조례에서 제한하는 환경과 관련되는 중점 검토 항목을 선정하여 대상지 및 주변지역에 미치는 환경적인 영향을 미리 예측하여 검토함으로써, 사업을 시행하려고 하는 이용자에게 계획 대상지 또는 사업 대상지에 대한 환경적 측면에서의 사업 가능 여부를 제공할 수 있다. 
       
     환경성 검토, 부동산
Patent KR-20100038797-A (KR)
Title: Composition comprising a crude complex herb extract showing anti-aging and anti-wrinkle activity
Inventor: SON JUN HO
IPC: A61K8/97
Filed: 2008-10-06
Abstract: PURPOSE: A composition containing complex medicinal herb extract as an active ingredient is provided to ensure xanthine oxidase suppression and elastase suppression. CONSTITUTION: A pharmaceutical composition for preventing and treating skin aging and wrinkle contains Coptis chinensis F., Phellodendron amurense R., Scutellaria baicalensis G., Forsythia suspensa V., Lonicera japonica T., and Gardenia jasminoides F. The extract is isolated using water, low alcohol of 1-4 carbon atoms, or mixture thereof, acetonitrile, propylene glycol, acetic acid ethyl, butylenes glycol, ether, glycerin, and chloroform. The pharmaceutical composition is used in the form of cream, gel, patch, spray, ointment, lotion, liniment, paste or cataplasma.
Patent KR-20090037366-A (KR)
Title: Aes encryption/decryption circuit
Inventor: HOTTA HIROHISA
IPC: H04L9/06
Filed: 2008-10-10
Abstract: An AES encoding/decoding circuitry is provided to reduce the number of cycles required for the AES encoding by minimizing the difference between the summations of the signal processing time of each sub block conversion. A round feature module(105) is provided as the AES encoding/decoding circuitry. The first AddRoundKey conversion module(110) receives the input signal(165) and the round key A(162), and performs the AddRoundKey conversion. The second AddRoundKey conversion module(114) receives the output of the ShiftRows conversion module(112) and the round key B(163), and performs the AddRoundKey conversion. The SubBytes conversion module(111) receives the output of the first AddRoundKey conversion module(110), and performs the SubBytes conversion. The ShiftRows conversion module receives the output of the SubBytes conversion module, and performs the ShiftRows conversion. The MixColumns conversion module(113) receives the output of the ShiftRows conversion module and performs the MixColumns conversion. The data holding part outputs the output signal of the encoding/decoder.
Patent KR-20100042416-A (KR)
Title: Installation for gps applied to car having a function of additional communication
Inventor: NA BYOUNG BONG
IPC: G08G1/09
Filed: 2008-10-16
Abstract: PURPOSE: A GPS(Global Positioning System) having a value added communication function is provided to maximize usability of a GSP module by providing basic data quickly and implementing easily a connection between an engine and a value added device. CONSTITUTION: A GSP module(203) receives a satellite signal from a plurality of artificial satellites, and extracts coordinate information and time information for the current position. A switch(215) selects an arbitrary communication mode and sets an identification information. A memory(205) holds the communication protocol corresponding to the arbitrary communications mode. The operation algorithm for the GPS apparatus is stored. The registration of the characteristic identifying information is managed. A controller(201) controls the real time output of the characteristic identifying information, and the communications module of the visual information and coordinate information.
Patent KR-20100042855-A (KR)
Title: Assistance heater apparatus for rhinitis
Inventor: JUNG KI CHUL
IPC: A61F7/00
Filed: 2008-10-17
Abstract: PURPOSE: A secondary warmer for treating rhinitis is provided, which is capable of radiating far infrared ray profitable to the human body. CONSTITUTION: A secondary warmer for treating rhinitis comprises: a mask(M) in which a wearing member is equipped in one side, an accommodation space in which nose is put is formed, a plurality of hotwires are buried, and a hole is formed in the lower part; a battery(24) supplying the power to the mask hotwire; and a power supply unit(2) consisting of a switch. In the lower part of the mask, a hole corresponding to the nostrils is formed. In the hole, a rapid heating part is formed.
Patent KR-20100045342-A (KR)
Title: The ac power led illuminating apparatus having power stabilization function
Inventor: SHIM HYUN SEOP
IPC: H05B37/02
Filed: 2008-10-23
Abstract: PURPOSE: An AC power LED device is provided to simplify a circuit composition by excluding an exclusive SMPS(Switching Mode Power Supply) and a transformer coil. CONSTITUTION: An AC power LED lighting device comprises an LED driver circuit(10), a constant voltage circuit(20) and a constant current circuit(30). The LED driver circuit comprises a power supply unit(11), a rectifier(12) and an LED driving unit(13). The power supply unit receives the AC power from the outside. The rectifier rectifies the AC power source. The LED driving unit drives an LED with the rectified power. The constant voltage circuit supplies the power of a preset voltage to an LED. The constant current circuit supplies the power of the preset current to the LED.
Patent KR-20100045732-A (KR)
Title: A transparent coating resin composition of a high hardness type of at least 5h which can be generally used as the bottom coating, base coating, top coating of a material for ferrous or nonferrous metals relating to electric and electronic products, in particular cellular phones, and a coating method and coating material using such composition
Inventor: SEO DONG SOO
IPC: C08G18/61
Filed: 2008-10-24
Abstract: PURPOSE: A reformed silicon-urethane transparent coating resin, a coating method using thereof, and a coating material including thereof are provided to secure the transparency, drug resistance, and adhesion of the resin. CONSTITUTION: A manufacturing method of a reformed silicon-urethane transparent coating resin comprises the following steps: producing polyurethane pre-polymers including 20~40wt% of polyol, 1~10wt% of polydimethylsiloxane polyol with hydroxyl groups on both ends, 20~40wt% of isocyanate, 4~10wt% of a compound with two hydroxyl groups, and 0~70wt% of NMP solvent; forming a resin by adding 1~20wt% of blocking agent to the mixture for blocking an isocyanate functional group of the polyurethane; and reacting the un-reacted isocyanate with 1~20wt% of low-molecular-weight polyols.
Patent KR-20100046558-A (KR)
Title: Light emitting diode package and method for manufacturing the same
Inventor: PARK CHIL KEUN
IPC: H01L33/54
Filed: 2008-10-27
Abstract: PURPOSE: A light emitting package and a manufacturing method thereof are provided to reduce the size of a package by forming a zener diode on a substrate. CONSTITUTION: A substrate with the first polarity includes a groove corresponding to upper and lower surfaces. First and second insulation layers have openings which exposes a part of the upper and lower surfaces of the substrate on both sides of the groove. First to fourth diffusion layers are formed on the upper and lower surfaces of the substrate exposed through the openings. First to fourth electrodes are connected to first to fourth diffusion layers and are formed on the upper sides of the first and second insulation layers. A first light emitting diode(201) is flip-chip bonded with the first and second electrodes. A second light emitting diode(202) is flip-chip bonded with the third and fourth electrodes.
Patent KR-20100047595-A (KR)
Title: Display device having moving port
Inventor: LEE WOO YEUL
IPC: H04N5/64
Filed: 2008-10-29
Abstract: PURPOSE: A display device with a mobile terminal is provided to change a location of an input/output terminal according to a surrounding environment, thereby improving connecting convenience with an external device. CONSTITUTION: A case(110) comprises a mobile hole(111). A main printed circuit board is built in the case. An input/output terminal unit(130) is located in the outside of the case, is connected to an external device, and moves along the mobile hole. A cable connects the main PCB with the input/output terminal unit. The input/output terminal unit includes a terminal plate, a penetrating body, and a hook plate.
Patent KR-20100047960-A (KR)
Title: Oil recovery system and method for recycling of fleshing scrap
Inventor: KIM BAEK HO
IPC: B09B3/00
Filed: 2008-10-30
Abstract: PURPOSE: An oil recovery device for recycling fleshing scrap and a method thereof are provided to reduce waste processing costs by extracting and using oil contained in the fleshing scrap with a solvent to recycle the fleshing scrap. CONSTITUTION: An oil recovery device includes the following: a reactor(10) with an outlet(15) formed on a bottom part of the device and a solvent outlet(14) formed on the top; a stirrer(17) mounted on the reactor to react fleshing scrap and the solvent; a vacuum pump(20) connected to the solvent outlet; and a solvent reservoir(19) storing the discharged solvent. The solvent includes n-hexane.
Patent KR-20100050101-A (KR)
Title: Plasma display apparatus
Inventor: CHO JANG HWAN
IPC: G09G3/292
Filed: 2008-11-05
Abstract: PURPOSE: A plasma display apparatus is provided to suppress a plane discharge by supplying a positive voltage to a sustain electrode in a period when the voltage of a scan electrode is dropped. CONSTITUTION: A plasma display panel comprises a scan electrode, a sustain electrode, and an address electrode. The scan electrode and sustain electrode are crossed with each other at the address electrode. A driving unit supplies a first signal to a scan electrode in a set up period of a reset period at a sub-field. A driving unit supplies a second signal to a sustain electrode. A first signal comprises a rising and a falling part. The second signal is overlapped with the first signal. The second signal does not include a voltage falling region.
Patent KR-20080107338-A (KR)
Inventor: SONG KYUNG YONG
IPC: A01K63/06
Filed: 2008-11-14
Abstract: 본 발명은 친환경적이며 경제적이고 또한 광출력 제어 특성이 있는 차세대 조명장치인 LED를 이용하여 최적의 조명인 자연광 햇빛의 일일 수중 광량 변화를 수족관 수조의 조명에 적용 구현한 것이다. 
     	첫째, 이를 위하여 본 발명은 열대의 수중 생물들이 살고 있는 수중의 하루 동안의 시간별 햇빛의 광량 변화를 조사하여 이를 바탕으로 일일 수중 태양 광량 변화표를 만든 후 이를 바탕으로 직류전류가 LED의 광출력을 제어하는 특성을 활용하여 광량 자동조절 수조등을 구현한다. 
     	둘째, 수동 광량 조절 스위치를 추가 적용함으로써 여러 종류의 수초 및 수조 환경에 따라 광량을 별도로 추가 조절할 수 있도록 구현한다. 
       
     햇빛, 광량 조절, 자동 광량 조절, 엘이디, LED, 수족관, 수조 등
Patent KR-20100056933-A (KR)
Title: Transmission system for providing url information using wireless terminal and proxy server and method thereof
Inventor: YU EUNG JAE
IPC: H04N21/437
Filed: 2008-11-20
Abstract: PURPOSE: A transmission system for providing URL information using a wireless terminal and a proxy server and a method thereof are provided to enable a user to receive detailed information through a separate wireless terminal in real time if the user wants to read the detailed information about the specific object of the broadcast contents. CONSTITUTION: An STB(Set Top Box)(200) stores URL information of specific objects included in broadcast contents. The STB receives a selection signal about one specific object. The STB extracts the URL information of the specific object corresponding to the selection signal. A proxy server(600) receives the URL information and transmits the detailed information to the STB. A wireless terminal(130) receives the detailed information. The wireless terminal displays the received detailed information.
Patent KR-20100057134-A (KR)
Title: Tool offset device of straddle tool assembly
Inventor: KIM HEE SEOK
IPC: B23Q15/16
Filed: 2008-11-21
Abstract: PURPOSE: A tool offset device of a straddle tool is provided to extend tool replacement cycle by correcting the position of a tool according to the abrasion of the tool. CONSTITUTION: A tool offset device of a straddle tool comprises a main block(100), a dial bolt(130), and an elevating bolt(140). The main block has a female screw(112) and a guide part. The guide part is formed at the lower part of the female screw to be parallel to the axial direction of the female screw. A dial bolt comprises a male screw(132), a fine female screw(134), and scales. The male screw is formed on the outer diametral part and the fine female screw is formed on the inner diametral part. The spiral direction of the fine female screw and male screw is opposite. The elevation bolt comprises a minute male screw(142) and a head(144). The fine male screw is coupled with the fine female screw. The head is elevated in the guide part of the main block.
Patent KR-20100057149-A (KR)
Title: 충전/사용 카드 거래 처리 방법 및 시스템과 이를 위한 기록매체
Inventor: LEE JANG HYUK
IPC: G06Q20/40
Filed: 2008-11-21
Abstract: 본 발명은 충전/사용 카드 거래 처리 방법 및 시스템과 이를 위한 기록매체에 관한 것으로서, 본 발명에 따른 충전/사용 카드 거래 처리 방법은, 지불결제/금융거래용 사용카드와, 상기 사용카드에 대한 지불결제/금융거래 승인용 충전금액을 충전하는 충전카드를 연계하여 이루어진 충전/사용 카드를 발급한 카드 발급사에서 상기 충전/사용 카드 거래를 처리하는 방법에 있어서, 밴사의 카드사 BIN D/B에 상기 충전/사용 카드의 사용카드 BIN 정보를 저장시키는 단계와, 밴사 서버에서 가맹점 단말(또는 서버)로부터 전송된 승인요청 전문을 수신하고, 상기 카드사 BIN D/B를 통해 상기 승인요청 전문을 카드 발급사 서버로 중계 전송하면, 상기 밴사 서버로부터 상기 카드정보와 거래금액 정보를 포함하는 승인요청 전문을 수신하는 단계와, 상기 승인요청 전문에 포함된 카드정보를 판독하여 상기 사용카드에 할당된 BIN 정보를 포함하는 사용카드 정보와, 상기 사용카드 정보와 연계된 충전카드 정보와 상기 충전카드를 통해 충전된 충전금액 정보를 확인하는 단계와, 상기 충전금액 정보를 통해 상기 승인요청 전문에 포함된 거래금액에 대한 승인을 처리하는 단계와, 상기 승인 처리에 대응하는 승인결과 전문을 상기 밴사 서버로 전송하는 단계 및 상기 승인 처리 후 일정기간 경과시, 상기 충전카드를 통해 충전된 충전금액을 통해 거래 승인된 사용카드 승인 금액에 대한 전표를 매입 처리하는 단계를 포함한다. 
       
     충전, 사용, 카드
Patent KR-20100060143-A (KR)
Title: Photocurable silicon resin for sealing of electric device
Inventor: SON JUNG HYUN
IPC: C08G77/00
Filed: 2008-11-27
Abstract: PURPOSE: A photocurable silicon resin for sealing an electric device is provided to prevent a yellowing phenomenon due to a photoinitiator by inducing a photocurable reaction without adding the photoinitiator and to obtain excellent transparency, heat resistance, and UV resistance. CONSTITUTION: A photocurable silicon resin for sealing an electric device is marked as a chemical formula 1, 2, or 3. In the chemical formulas, R is R_1OA-CH=CH- C(=O) R_3 or the R_1O-CH=CH-C(=O)R_3. R_1 is alkyl, alkyl ester, alkoxy, alkylcarbonyl, arly, or heteroaryl of carbon number 1-30. A is alkyl, alkoxy of carbon number 1-30, halogen, amide, cyano, hydroxyl, nitro, aryl, or heteroaryl. R_3 is an aromatic ring compound, aryl, or heteroaryl.
Patent KR-20100064564-A (KR)
Title: Apparatus for attaching panel
Inventor: LEE WANG KUN
IPC: B63B25/08
Filed: 2008-12-05
Abstract: PURPOSE: A panel attaching apparatus is provided to apply uniform pressure on a press plate using atmospheric pressure. CONSTITUTION: A panel attaching apparatus comprises a press member(20), a sealing member(30), and an air discharge unit(40). The press member presses a panel to an attachment object plane. The sealing member forms a space for sealing the panel. The sealing member comprises a sealing film which is faced to the attachment object plane. The sealing film is made of elastic materials.
Patent KR-20100066698-A (KR)
Title: Cooling and heating water system for peltier
Inventor: YASUMASA NAGAO
IPC: F24D17/00
Filed: 2008-12-10
Abstract: PURPOSE: A cooling and heating water system for a peltier element using a structure is provided to improve the driving efficiency of a peltier element and minimize noises during the operation. CONSTITUTION: A cooling and heating water system for a peltier element comprises a first tank and a peltier module(300). Water is stored inside the first tank. The peltier module is connected to the first tank and produces the hot or cold water by circulating the water in the first tank. The peltier module comprises one or more peltier elements(310) and a first flow path structure(320). Each peltier element comprises a cooling surface(310a) and a heating surface(310b) whose both ends are independently cooled and heated by current application. The first flow path structure contacts one of the cooling surface and the heating surface with one peltier element interposed.
Patent KR-20100068504-A (KR)
Title: Bike lock with first class lever
Inventor: HONG GI SUK
IPC: B62H5/00
Filed: 2008-12-15
Abstract: PURPOSE: A bicycle lock using the principal of a first class lever is provided to remove inconvenience of carriage of a bicycle lock and minimize the operation for releasing the lock. CONSTITUTION: A bicycle lock comprises a main body of metal rod type using the principal of a first class lever. Two metal rods and a rod-like element are locked by being connected with the top frame of a bicycle therebetween. An unlocking operation is made at the position above user's waist.
Patent KR-20100069033-A (KR)
Title: Method of preparing ultrafine shaped polyrster yarn having antibacterial property
Inventor: LEE KWANG JU
IPC: D01F6/62
Filed: 2008-12-16
Abstract: PURPOSE: A manufacturing method of micro anti-bacterial fiber with modified cross-section is provided to improve antibacterial property of the fiber while improving spinning workability with nanosilver particles, and to prevent property degradation of a polyester polymer. CONSTITUTION: A manufacturing method of micro anti-bacterial fiber with modified cross-section comprises the following steps: forming an polyester composition with nanosilver particles of 50-2,000ppm by mixing nanoparticles of a 2-100nm diameter and a polyester polymer; molding the filament with the modified cross-section by melting the polyester composition with a spinneret; cooling the filament with the modified cross-section; forming undrawn yarns by solidifying the filament with the modified cross-section; and forming the drawn yarns with the modified cross-section by drawing the undrawn yarns.
Patent KR-20100070256-A (KR)
Title: High strength steel sheet with excellent erw properties and manufacturing method thereof
Inventor: KIM SUNG KYU
IPC: B21B3/00
Filed: 2008-12-17
Abstract: PURPOSE: A high strength hot rolled steel plate with a superior electric resistance welding property and a manufacturing method thereof are provided to control the decreasing of martensite fraction. CONSTITUTION: A high strength hot rolled steel plate with a superior electric resistance welding property comprises C 0.05~0.15 weight%, Si 0.3~1.0 weight%, Mn 1.0~1.7 weight%, Cr 0.5~1.5 weight%, Al 0.1~0.4 weight%, less than S 0.005 weight% less than P 0.03 weight%, less than N 0.008 weight%, and the rest Fe and the other inevitable impurities. A hot rolled steel sheet additionally includes more than 1 alloying element of Nb 0.01~0.1 weight% and Ti 0.01~0.1 weight%. The hot rolled steel sheet is a matrix tissue and includes the ferrite structure to the volume fraction 50~60 weight%.