baber/WOPTO huggingface dataset:
Patent KR-20080007119-A (KR)
Title: Method for treating exhaust gas from internal combustion engine
Inventor: IKEDA MASANORI
IPC: F01N3/10
Filed: 2007-07-11
Abstract: A method for purification of exhaust gas from an internal combustion engine is provided to extend a temperature range which allows combustion of high concentration hydrocarbon or supply quickly high temperature gas to a rear catalyst. A method for purification of exhaust gas from an internal combustion engine includes a step of arranging an internal combustion engine exhaust gas temperature raising catalyst in an upper stream of the catalyst in accordance with the flow of exhaust gas in an exhaust gas passage of the internal combustion engine, and a step of introducing hydrocarbon in the amount of 1,000 to 40,000 ppm in methane when converted, from the upper stream of the catalyst. The temperature raising catalyst includes catalytically active components which are supported on a refractory three-dimensional structure by a slope gradient of concentration which is lowered toward an exhaust gas outlet side from an exhaust gas inlet side.
Patent KR-20080050249-A (KR)
Title: Method for providing network communication service in consistent quality regardless of wired/mobile network environment
Inventor: KIM SUN ME
IPC: H04L9/32
Filed: 2007-07-11
Abstract: A method for providing a network communication service with consistent quality regardless of a wired/wireless network environment is provided to allow a communication provider to effectively increase service providing areas with respect to a wired network and a wireless network. When a user requests a network connection(S701), collecting equipments add path information, to which the user belongs, to a connection request signal packet and transfers the same to a network connection equipment(S702). The network connection equipment requests an authentication server to authenticate the connection requested user and the authentication server informs the network connection equipment about an authentication result to authenticate the user(S703). The user is allocated an IP address from the network connection equipment(S704). The authentication server transfers a service protocol file to a policy control server(S705), establishes a control policy suitable for an SLA(Service Level Agreement) of the user and transfers it to the network connection equipment so that the control policy according to a service class of the user can be set in the network connection device(S706). The policy control server checks over whether the user is connected via a wired network or a wireless network(S707). When the user is connected via the wired network, the policy control server checks whether the user is a home user or a visiting user(S708).
Patent KR-20080086804-A (KR)
Inventor: PARK YOON SIG
IPC: F16B21/06
Filed: 2007-07-12
Abstract: A mounting device is provided to facilitate attachment/detachment of two objects by installing a fixing member and a removable member coupled to the fixing member. A mounting device comprises a removable member coupled to a first object and a fixing member(130) coupled to a second object. The removable member includes a disc shaped body on which a coupling surface and a coupling protrusion for coupling with the second object are formed. The fixing member includes a plate shaped body, a circular insertion groove formed in the middle of the body, two fixing ends formed around the insertion groove, and a fixing protrusion formed on the inner circumference of the insertion groove.
Patent KR-20090006553-A (KR)
Title: Voltage measuring device of fuel cell stack for vehicle
Inventor: MOON HEE CHUN
IPC: G01R31/36
Filed: 2007-07-12
Abstract: A voltage measuring device of a vehicle fuel cell stack is provided to precisely measure a voltage in spite of the vibration of a vehicle body by stably keeping a contact state between separation plates and a connector and an insulation state of the separation plates. A rectangular terminal fixing element(20) has a connector mounting groove in a top surface and penetrated terminal fixing holes formed at the same interval with that of terminals(11) of separation plates(10) stacked uniformly. A connector(30) has a rectangular housing(31) to be inserted into the connector mounting groove and terminals(32) formed of elastic metal pieces disposed in pair and contacting the terminals of the separation plates. An ECU(40) is mounted on the connector and has terminal insertion holes(41) for inserting the terminals of the connector.
Patent KR-20090011391-A (KR)
Title: A wear device for floor surface pollution testing system
Inventor: AHN BYEONG KWON
IPC: G01N19/08
Filed: 2007-07-26
Abstract: A floor material wearing apparatus for measuring a contamination level of the surface of a floor material is provided to artificially wear the floor material at a high speed in order to test contamination-resistance of the floor material and correctly measure the contamination level according to the extent of wearing of the floor material. A floor material wearing apparatus for measuring a contamination level of the surface of a floor material includes a plurality of wheels(11), a main frame(10) having a fixing part(12) for controlling the wheels to move or stop, at least one rail(20), at least one guide(30) vertically moved, a plate(40) having a ball screw(41), a screw axis(50) rotatably fixed to the top of the main frame, a driving motor(60) rotating the screw axis, a plate(70) vertically moved, an abrasion element(80) fixed to the bottom of the plate, a weight(90) adjusting the weight of the abrasion element, and a control panel(100) controlling the driving motor and the plate.
Patent KR-20090012656-A (KR)
Title: 레터링 서비스를 제공하는 이동 통신 시스템 및 착신전환시의 레터링 서비스 방법.
Inventor: YOO HYEONG CHAE
IPC: H04W4/16
Filed: 2007-07-31
Abstract: 레터링 서비스를 제공하는 이동 통신 시스템 및 착신 전환시의 레터링 서비스 방법이 제공된다. 본 발명에 따른 착신 전환시의 레터링 서비스 방법은, 이동 통신 시스템을 이용한 레터링 서비스 방법으로서, 착신 단말기의 착신 전환 정보를 확인하는 단계와, 발신측 교환기가 상기 착신 전환 단말기의 위치 정보를 요청하는 단계와, 발신 단말기의 레터링 정보를 호출하는 단계와, 착신 전환측 교환기로 착신을 요청하는 단계와, 상기 레터링 표시와 함께 상기 착신 전환 단말기로 페이징을 수행하는 단계를 포함하여 구성된다.  
       
     레터링, CNAP, RND
Patent KR-20090015656-A (KR)
Title: Apparatus for treating substrate
Inventor: SHIN IN CHUL
IPC: H01L21/677
Filed: 2007-08-09
Abstract: An apparatus for treating substrate is provided to improve the efficiency of processing a substrate per hour by processing a substrate with five chambers at the same time. In an apparatus for treating substrate, a substrate processing apparatus includes a buffer module(100), a first and second transport modules(110,120), and first or fifth process module(131-135). A cassette(160) in which the substrate to be processed or the finished substrate is mounted is placed on the front of a buffer module. The loading and the unloading system(150) for substrate are arranged between the buffer module and the cassette. The buffer module is between a first and the second transport module which are assembled. A robot arm(112,122) or a handler for loading or unloading is arranged inside the first and the second transport module.
Patent KR-20070094713-A (KR)
Title: Electric heating type air current drying appartus for mechanical biological treatment and refuse derived fuel plant
Inventor: JEON YOUNG BONG
IPC: F26B3/20
Filed: 2007-08-24
Abstract: An electric heating type air current drying apparatus for mechanical biological treatment(MBT) and a refuse derived fuel plant(RDF) are provided to obtain uniformed heat efficiency and to minimize heat loss by installing a heating wire covered with a heat insulation layer. A cyclone type air current drying apparatus comprises a cylindrical part(110), a conical part(120), a heating wire(130), and a heat insulation layer(131). The cylindrical part is an upper part of the air current drying apparatus and is composed of an inlet(111) and an outlet(112). The conical part has an outlet(121) on the bottom side. The heating wire surrounds the conical part to heat up the air current drying apparatus as long as a power is supplied thereto. The heat insulation layer surrounds over the conical part and the heating wire.
Patent KR-20090025576-A (KR)
Title: Method and system for providing advertisement using moving average quality index
Inventor: SONG KI HO
IPC: G06Q30/02
Filed: 2007-09-06
Abstract: A method and a system for providing advertisement by using a moving average quality index are provided to enable an advertiser to expose an advertisement in various advertisement areas through one bid by unifying advertisements exposed for an advertisement area. An advertisement providing system extracts a quality index which is calculated for recent n days about advertisement(S311). The advertisement providing system removes an outlier based on the extracted quality index(S312). The advertisement providing system calculates a moving average value of the extracted quality index by a moving average quality index(S313). The advertisement providing system computes a rank index of advertisement based on the maximum click cost and moving average quality index of the advertisement(S321). The advertisement providing system exposes advertisement based on the rank index(S322).
Patent KR-20090027429-A (KR)
Title: Method for forming micropattern in semiconductor device
Inventor: KIM WON KYU
IPC: H01L21/32
Filed: 2007-09-12
Abstract: A method of forming the micro-pattern of a semiconductor device is provided to improve the nonuniformity of the critical dimension of a line width due to twice mask processes in the DPT(Double Patterning Technology) process. The first etch stopper layer(202), the second etch stopper layer and the first sacrificial layer are successively formed on the etch target layer(201). The first sacrificial layer and the second etch stopper layer are locally etched to form the first sacrificed pattern(204A). The insulating layer(209A) is formed along the upper side of first etch stopper layer including the first sacrificed pattern. The second sacrificial layer is formed on the insulating layer. The second sacrificial layer and the insulating layer are planarized and the first sacrificed pattern is exposed. The first sacrificed pattern and the second sacrificial layer are removed. The second etch stopper layer and the insulating layer are etched and the second sacrificed pattern is molded. The first etch stopper layer is etched by using the second sacrificed pattern as the etch barrier layer. The etched layer is etched by using the etched first etch stopper layer as the etch barrier layer.
Patent KR-20090036252-A (KR)
Inventor: KANG SUNG MAN
IPC: A47J36/04
Filed: 2007-10-09
Abstract: A stone grill is provided to improve the taste of roasted meat by radiating far infrared rays toward the meat, and to heat the meat quickly and uniformly by allowing the meat to be exposed to the radiant heat emitted from the heating source. A stone grill comprises a plurality of processed stones(20) in which a hole is formed in the center, a grill(10) in which the processed stones are combined, and an oil pan(30) installed under the grill. The grill includes a square frame(11) and fixing rods(12) which are transversely arranged in the frame to penetrate the processed stones.
Patent KR-20090036439-A (KR)
Title: Skew preventing unit with delaying unit and signal tranmitting circuit having the same
Inventor: KIM JONG SU
IPC: G11C11/4093
Filed: 2007-10-09
Abstract: A skew preventing unit with a delaying unit and a signal transmitting circuit having the same are provided to reduce the layout area by using the transmission gate as the delay unit. A transmission gate(T) is comprised of a PMOS transistor and an NMOS transistor. The source and drain of the PMOS transistor and the NMOS transistor are connected each other. The transmission gate is set up in the turn on mode. The voltage(VLow) of the low level is applied to the gate of the PMOS transistor. The voltage(VHigh) of the high level is applied to the gate of the NMOS transistor. The transmission gate has the delay time of a plurality of inverter chain levels. The skew property is secured by making the length of the gate electrode of the transistor comprising the transmission gate shorter than the length of the existing gate electrode. The output signal of the transmission gate is buffered by a buffer unit(12).
Patent KR-20090037720-A (KR)
Title: Contents service providing method and authentication method between device and device using broadcast encryption, display device and device for low resource
Inventor: JUNG BAE EUN
IPC: H04L9/32
Filed: 2007-10-12
Abstract: A contents service providing method using the broadcast encryption and an authentication method between devices are provided to perform the authentication between the devices by decoding the encryption information using the confidential key set. The contents service offering method using the broadcast encryption is as follows. The small source device transmits its own ID to a playing component(S201). The playing component receives and stores the MKB(Media Key Block) and the revocation list from the server. The playing component extracts the encryption information from the MKB based on the ID and the revocation list and transmits to the small source device. The small source device receives the encryption information from the playing component(S202). The small source device decodes the encryption information by using the confidential key set(S203).
Patent KR-20090039239-A (KR)
Title: Method for over-expressing human epidermal growth factor as bioactive form in escherichia. coli
Inventor: JUNG JOON KI
IPC: C12N15/66
Filed: 2007-10-17
Abstract: A mass producing method of active human epidermal growth factor from E.coli is provided to over-express human epidermal growth factor protein in active form by fusing with fusion peptide or protein. A producing method of active human epidermal growth factor(EGF) comprises: a step of culturing E.coli host cell transformed with recombinant vector to express fusion protein which peptide or protein selected from a group of signal sequence which consists of human EGF and synuclein fragment of N-terminal or C-terminal of human EGF, maltose binding protein(MBP), disulfide bond A(DsbA), disulfide bond C(DsbC), pectate lyase B(PelB); and a step of separating the fusion protein from culture media.
Patent KR-20090043060-A (KR)
Inventor: KIM HAN SANG
IPC: H04B1/40
Filed: 2007-10-29
Abstract: 본 발명은 휴대 단말기 및 그의 동영상 관리 방법에 관한 것으로, 적어도 하나의 동영상을 저장하는 메모리와, 동영상 검색 시, 적어도 하나의 동영상을 설정된 미리보기 구간의 동영상 미리보기로 재생하고, 동영상 선택 시, 선택된 동영상을 재생하도록 제어하는 제어부와, 제어부의 제어 하에, 재생되는 동영상 미리보기 및 재생되는 동영상을 표시하는 표시부를 포함하는 휴대 단말기 및 동영상 검색 시, 적어도 하나의 동영상 목록을 제 1 화면에 표시하는 과정과, 동영상 중 어느 하나를 설정된 미리보기 구간의 동영상 미리보기로 제 2 화면에서 재생하는 과정과, 재생되는 동영상 선택 시, 선택된 동영상을 재생하는 과정을 포함하는 휴대 단말기의 동영상 관리 방법을 제공한다. 본 발명에 따르면, 휴대 단말기의 동영상 관리 효율성을 향상시킬 수 있는 이점이 있다.  
       
     휴대 단말기, 동영상, 미리보기 구간, 동영상 미리보기, 재생
Patent KR-20080039283-A (KR)
Title: Button holing sewing machine
Inventor: MURAI KENJI
IPC: D05B3/06
Filed: 2007-10-30
Abstract: A sewing machine for holding a button is provided to insert a thread into a needle bar smoothly without using a separate threading machine, thereby efficiently performing a thread-threading operation. A sewing machine comprises a needle bar(12) having an upper thread guider therethrough, an up-down moving unit(20) for upwardly or downwardly moving the needle bar, a needle-shaking unit(30) for shaking the needle bar, a looper(40), a turning unit(60) for turning the needle bar and the looper, and a moving unit for moving processed cloth. The needle bar has an inclined opening for jetting air to the upper thread guider. An air nozzle for an upper thread is disposed at a side of the needle bar. A controller controls the up-down moving unit, the needle-shaking unit, and the turning unit to fix the opening of the needle bar to an outlet of the nozzle.
Patent KR-20090044232-A (KR)
Inventor: KANG BYUNG GU
IPC: B62D7/20
Filed: 2007-10-31
Abstract: 본 발명은 타이로드와 너클 마운팅의 결합 구조에 관한 것으로, 특히 타이로드 엔디브의 끝단에 결합부를 형성하고, 결합부와 같은 타원형의 결합홀이 구비된 너클 마운팅을 조향 너클의 일측 단부에 형성하며, 너클 마운팅과 결합부를 회전축을 이용하여 관통 결합한 후에 차량이 유동시 너클 마운팅이 상,하 이동을 제한할 수 있도록 결합부와 너클 마운티 사이의 회전축에 스토퍼를 결합 구성하므로서, 
     상기 결합부를 너클 마운팅의 중앙 부에 위치한 상태에서 회전축으로 결합시켜 차량이 회전할 때, 타이로드 엔드부의 좌,우 회전 이동하는 거리가 켜져 차량의 최소 회전 반경을 증대시켜 조향 너클이 타 부품과의 마찰을 해소할 수 있으며, 또한 상기 차량의 유동 시 조향 너클의 좌,우 회전 반경을 축소시켜 휠 가드 또는 휠 하우스, 또는 휀더와의 충돌을 방지할 수 있으며 서스펜션 링크류의 요동각을 확보할 수 있도록 형성된 타이로드와 너클 마운티의 결합 구조에 관한 것이다. 
       
     조향기어박스, 타이로드, 타이로드 엔드부, 결합부, 회전축, 스토퍼, 조향 너클, 너클 마운팅, 결합홀,
Patent KR-20080041136-A (KR)
Title: Fan module for a vehicle seat and motor vehicle seat with noise insulation
Inventor: CLAUSS MAURICE
IPC: B60N2/90
Filed: 2007-11-06
Abstract: A fan module of a vehicle seat and a motor vehicle seat with noise prevention function are provided to reduce a manufacturing cost and to reduce operational noise by aligning a sound discharging hole of an air conveyor to cross air flow and covering the sound discharging hole with a sound absorbing member. A fan module(10) of a vehicle seat comprises a housing(12), a sound absorbing member(22), and at least one sound discharging hole(20). The housing and/or a duct(14) is covered with the sound absorbing member. At least one sound discharging hole is formed at a lower part of a rear part of an air conveyor(16) to air flow(18) direction and crossing direction of the air flow. The sound discharging hole is placed between a heater(24) and the air conveyor in the duct, specifically at a lower part of the heater, where air flow passes.
Patent KR-20090048938-A (KR)
Inventor: AN SUN SHIN
IPC: H04L12/28
Filed: 2007-11-12
Abstract: 본 발명은 이동 단말기를 이용하여 USN(Ubiquitous Sensor Network)을 통해 실현할 수 있는 기능을 제어할 수 있는 시스템에 관한 것이다. 
     본 명세서에서 개시하는 USN의 제어 시스템은 SN과 직접 연결된 이동 단말기 또는 원격지에 있는 이동 단말기로부터 상기 SN의 특정 센서 노드의 동작제어 명령을 받아 동작제어 명령 메시지를 발생시키는 제어 명령 메시지 발생부; 상기 동작제어 명령 메시지를 상기 특정 센서 노드가 해독 가능한 명령어로 변환시키는 제어 명령어 변환부; 상기 변환된 명령어를 참조하여 동작제어 대상이 되는 상기 특정 센서 노드를 탐색하는 센서 노드 탐색부; 상기 탐색된 특정 센서 노드에 상기 변환된 동작제어 명령어를 전달하는 명령어 전달부; 및 상기 특정 센서 노드가 상기 동작제어 명령어에 따른 동작을 시작하였음을 상기 동작제어 명령에 대한 응답 메시지로써 상기 SN과 직접 연결된 이동 단말기에 통지하는 응답 메시지 통지부를 포함하고, 상기 원격지에 있는 이동 단말기로부터의 상기 동작제어 명령과 상기 원격지에 있는 이동 단말기로의 상기 응답 메시지의 통지는 SMS/MMS를 이용하여 이루어지도록 하여 본 발명의 과제를 해결한다.
Patent KR-20080057134-A (KR)
Title: Switching gate in conveying route for paper money and automatic cash transaction apparatus
Inventor: SHOJI NOBUYUKI
IPC: G07F19/00
Filed: 2007-11-14
Abstract: A switching gate in a conveying route for paper money and an automatic cash transaction apparatus are provided to prevent a jam of the paper money in a position where the switching gate is installed even if the paper money has a folded trace. A switching gate(50) in a conveying route for paper money comprises a plurality of blades(42) and a planar guide(53). The blades are fixed to a shaft(41) which rotates free. The blades have a first guide side(42a) bended with a concave shape and a second guide side(42b) bended with a convex shape. A guide side(55) of the planar guide is installed on a part of a first guide side of the fixed blade. A length from the shaft to an end of the planar guide is shorter than a length from the shaft to the first guide side. A boss(43) put into the shaft between each blade is further comprised to the switching gate.
Patent KR-20090050194-A (KR)
Inventor: MOON JUNG JIN
IPC: H01L21/02
Filed: 2007-11-15
Abstract: 기판 처리 장치는 공정 챔버, 셔터부 및 이격부를 포함한다. 공정 챔버는 기판을 대상으로 공정을 수행하기 위한 공간을 제공하고, 일측면에 외부로부터 기판을 제공받기 위한 입구가 형성된다. 셔터부는 공정 챔버의 입구에 설치되고, 입구가 형성된 공정 챔버의 일측면을 따라 슬라이딩하면서 입구를 개폐한다. 이격부는 셔터부에 설치되고, 셔터부가 입구가 형성된 공정 챔버의 일측면을 따라 슬라이딩할 때, 셔터부를 공정 챔버의 일측면으로부터 이격시킨다. 따라서, 셔터부는 공정 챔버의 일측면에 형성된 입구에서 원활하게 슬라이딩하면서 공정 챔버의 입구를 개폐할 수 있다.
Patent KR-20090050522-A (KR)
Inventor: SHIN JONG KYU
IPC: B23Q17/09
Filed: 2007-11-16
Abstract: 본 발명은  공작기계의 공구 클램핑 확인장치에 관한 것으로서, 상기 공구 클램핑 확인장치는 스핀들(20)의 공구 포트(21)에 장착되는 공구 홀더(22)에 인접하게 배치되어 상기 공구 홀더(22)와의 이격 거리인 제 1 간격(d1)을 감지하는 제 1 거리측정센서(50); 상기 제 1 거리측정센서(50)와 상기 스핀들(20)의 회전 중심축(CL)을 중심으로 한 원주 방향으로 따라 일정 각도 이격되고 상기 공구 홀더(22)에 인접하게 배치되며, 상기 공구 홀더(22)와의 이격 거리인 제 2 간격(d2)을 감지하는 제 2 거리측정센서(60); 및 상기 제 1 거리측정센서(50)로부터 감지된 상기 제 1 간격(d1)과 상기 제 2 거리측정센서(60)로부터 감지된 상기 제 2 간격(d2)이 기준 범위(d L0  ~ d H0 ) 내에 속하는지를 판단하고, 상기 제 1 및 제 2 간격(d1)(d2) 중 어느 하나가 상기 기준 범위(d L0  ~ d H0 )를 벗어난 경우 표시부(90)에 경고 표시를 출력하는 제어부(80)를 포함하여, 공구 홀더가 정확하게 장착되었는지를 판단할 수 있고, 이에 의해 공작기계의 신뢰성을 향상시킬 수 있다. 
       
     공구 홀더, 장착상태, 기울어짐, 거리측정센서, 원주방향
Patent KR-20090050805-A (KR)
Inventor: JOO SEOK YOUNG
IPC: H04N5/445
Filed: 2007-11-16
Abstract: 본 발명은 사용자의 동영상 탐색 편의성이 극대화된 디지털 이미지 처리장치를 위하여, 동영상 파일이 저장된 저장매체와, 상기 저장매체에 저장되어 있는 동영상 파일로부터의 동영상을 디스플레이하는 디스플레이부를 구비하며, 상기 저장매체에 저장된 일 동영상 파일로부터의 동영상을 상기 디스플레이부에 디스플레이하는 도중 사용자로부터의 탐색신호가 있으면, 상기 동영상을 상기 디스플레이부에 계속 디스플레이하면서, 상기 동영상의 탐색동영상을 상기 디스플레이부에 동시에 디스플레이하는 것을 특징으로 하는 디지털 이미지 처리장치를 제공한다.
Patent KR-20090055789-A (KR)
Title: Smart seat
Inventor: LEE NAM SU
IPC: A47C7/44
Filed: 2007-11-29
Abstract: A smart seat is provided, which makes a driver feel more comfortable and decreases fatigue by making the back and waist of the driver closely adhered to the driver seat. A manufacturing method of the smart seat comprises: a step of separating the structure of the waist support and seat back from the sheet; a step of controlling the angle of the seat back and the waist support; and a step of absorbing the impact by the suspension imbedded in the seat in collision or rear-end collision. The device for controlling the angle is installed in the top of the seat.
Patent KR-20090061378-A (KR)
Title: Thermo-shrinkable polyester film
Inventor: KIM YUN JO
IPC: C08J5/18
Filed: 2007-12-11
Abstract: A thermo-shrinkable polyester film is provided to prevent breakage in a rolling process accompanying fixed tension, to increase reliability of products and to secure process stability and productivity. A thermo-shrinkable polyester film has: strength in a direction perpendicular to a main shrinkage direction within initial elongation of 10 %; elongation at break of 50-700 % in a direction perpendicular to the main shrinkage direction; thickness uniformity(DeltaR) of 4 or less; shrinkage of the direction perpendicular to the main shrinkage direction of 5% or less; shrinkage of the main shrinkage direction in 95 °C warm water of 40 % or greater; and elongation at break of the main shrinkage direction of 60-120 %.
Patent KR-20090063542-A (KR)
Title: Test support method of test handler
Inventor: SHIM JAE GYUN
IPC: G01R31/26
Filed: 2007-12-14
Abstract: A test supporting method of the test handler is provided, which reduces the test time by increasing the operation efficiency of tester to the maximum. A test supporting method of the test handler is as follows. It supports so that the semiconductor devices of the prime lot can be classified according to the quality after the semiconductor devices of the prime are tested(S601). It determines whether the set retest start condition is satisfied or not before the prime lot test supporting step is completed(S602). In the decision step, if it is determined that the retest start condition is satisfied, retest toward the semiconductor devices of retest is supported(S603).
Patent KR-20090063653-A (KR)
Title: Method of manufacturing pn junction device and solar cell comprising the said pn junction device
Inventor: KIM BUM SUNG
IPC: H01L31/072
Filed: 2007-12-14
Abstract: A method for manufacturing a PN junction device with high efficiency and a solar cell including the PN junction device are provided to increase a surface area of a semiconductor substrate by using a porous surface structure. A plurality of holes are formed in a surface of a P-type silicon wafer substrate(100). A porous structure of a substrate surface is obtained by a wet chemical reaction, a dry chemical reaction, a wet electro chemical reaction, and a mechanical process method. An N type impurity region(120) with a lower depth than the depth of the hole is formed on the surface of the porous silicon wafer substrate. A post or sidewall of the hole is changed to the N type impurity region. The N type impurity region is formed in the same depth as the lowest base surface of the hole.