baber/WOPTO huggingface dataset:
Patent KR-20080027733-A (KR)
Title: A tool for chip removing machining and a cutting insert therefor
Inventor: WOLF MATHIAS
IPC: B23B51/00
Filed: 2007-09-19
Abstract: A mechanical tool for removing a chip and a cutting insert therefor are provided to allow the tool to be applied to a milling machine as well as a rotational cutting tool. A mechanical tool for removing a chip comprises a basic body and two replaceable cutting inserts(2,3). Each insert includes a main blade for removing a chip located between a chip surface(38) and a clearance surface(39). A first insert of the inserts operates prior to the second insert when processing a workpiece. The inserts overlap with each other in an area defined by a boundary. The main blade of the first insert forms a surface which crosses a surface formed by the main blade of the second insert along the boundary. The main blade of the second insert is formed along a chip surface including first and second sections.
Patent KR-20090035796-A (KR)
Title: Thin film type solar cell and method for manufacturing the same
Inventor: PARK WON SEOK
IPC: H01L31/046
Filed: 2007-10-08
Abstract: A thin film type solar cell and method for manufacturing the same is provided to prevent electrical contact defect between a bottom electrode and an external circuit by connecting a bottom electrode and a connection member with a transparent conductive layer and a conductive material. A thin film type solar battery comprises a circuit connection part and a cell part. A circuit connection part connects thin film type solar cell with an external circuit. An isolator portion(550) divides the circuit connection part and the cell part. The circuit connection member includes a bottom electrode(200) on the substrate, a semiconductor layer(300), a transparent layer(400), a top electrode(500) on the transparent layer, and a connection member(600).
Patent KR-20090036627-A (KR)
Title: System and method for outputting advertisement data by using internet banking account referring region and program recording medium
Inventor: KANG SEOK JIN
IPC: G06Q30/02
Filed: 2007-10-10
Abstract: A system and a method for outputting advertisement data by using internet banking account referring region and a program recording medium are provided to increase an advertisement effect by exposing the internet banking clients to the advertisement in various query screen. A client connecting through the internet banking requests an account inquiry. An advertisement extracting unit(440) extracts one or more advertisement data provided to a customer terminal from the advertisement database. An advertisement output unit(445) processes in order to output the extracted advertisement data as described above in the account inquiry domain offered to the customer terminal. The advertisement output unit outputs the extracted advertisement data as described above to the account inquiry domain.
Patent KR-20090036643-A (KR)
Title: Error corrector method to arrangement from teeth sjape in manufacturing system of the artificial tooth by using ivocap system
Inventor: LEE CHANG TACK
IPC: A61C13/38
Filed: 2007-10-10
Abstract: An error correction method from getting the teeth shape to the arrangement is provided, which reduces difference due to the change of volume or the contraction. An error correction method comprises: a first tooth impression process; a second tooth impression process; a process of spreading wax to the plaster model and setting up; a process of making the base structure using medical plastic; a wax rim process of forming wax roll of appropriate height; a process of cutting off the sheet wax and forming stopper; a process of putting mouth into mouth into patient and controlling height; a process of arranging the tooth on the prosthesis in which height is controlled and making the artificial tooth; a process of controlling the artificial tooth in which the tooth is arranged according to the tooth of patient; a process of cutting the flange part; a process of removing wax; a process of mixing the final impression member and injecting on the basis; a third tooth impression process; a process of modifying the base structure; a process of putting the base structure into frame and injecting the gypsum; a process of forming the path for the resin injection; a wax washing process; a process of separating the gypsum and removing wax; a process of mixing resin; a process of injecting resin by combining the wax-removed frame; a process of applying pressure; a curing process; and a process of cooling the artificial tooth.
Patent KR-20090038698-A (KR)
Title: Damaged bolt and screw removing devices
Inventor: LEE WONG YOUNG
IPC: B25B27/18
Filed: 2007-10-16
Abstract: A damaged bolt and screw removing devices are provided to shorten working hours and improve productivity by easily removing a head-damaged bolt and screw hard to be disassembled. A damaged bolt and screw removing devices comprise a main body(10) in which a handle(11) is formed; a bolt chuck(20) including three shafts supporting the outer surface of the head of a bolt; and a lock cap(30) formed at either tip of the main body. A lock cap gear unit(31) is formed on the lock cap. The lock cap gear unit is meshed with a position fixing protrusion(41) of the chuck adjusting tool and moves the bolt chuck to the radial direction.
Patent KR-20090039109-A (KR)
Title: Electric power steering apparatus equipped with noise reduction member
Inventor: SONG JOON KYU
IPC: B62D5/04
Filed: 2007-10-17
Abstract: An electric power steering apparatus equipped with a noise reduction member is provided to reduce the noise due to the backlash occurring between the worm and the worm wheel and the friction between the bearing and the worm shaft. An electric power steering apparatus includes a speed reducer. The speed reducer includes a worm wheel connected to a steering shaft, a motor generating auxiliary power by an ECU(Electronic Control Unit), a worm shaft(320) which is connected to the motor and in which a worm(322) is formed on the outside surface and a groove(324) is formed along the circumference, a bearing equipped in both sides of the worm shaft, a housing accommodating the worm and the worm wheel, and a noise reduction member(350) which is inserted in the groove of the worm shaft in order to reduce the noise generated in the speed reducer.
Patent KR-20090044397-A (KR)
Title: 포토마스크의 세정 방법
Inventor: RYU JI SUN
IPC: H01L21/304
Filed: 2007-10-31
Abstract: 불순물이 유발된 기판에 피라냐(Piranha) 용액으로 1차 세정한 후, 1차 세정한 기판에 핫 순수(hot DI)로 딥핑(dipping)하여 2차 세정하는 포토마스크의 세정 방법을 제시한다. 따라서, 포토마스크 표면에 잔류하는 황산이온에 의해 포토마스크 표면에서 생성되는 성장성 이물질을 미연에 방지할 수 있어 반도체소자의 수율을 향상시킬 수 있다. 
       
     핫 순수, 퀵 덤프 린스, 피라냐 용액, 습식세정
Patent KR-20090044536-A (KR)
Inventor: KIM HYUN JUNG
IPC: H01L29/78
Filed: 2007-10-31
Abstract: 본 발명은 기둥 모양의 패턴을 형성하는 도트 패턴(dot pattern) 형성 방식이 아닌 패턴이 형성되는 영역에 홀을 형성하고 패턴 형성 물질로 홀을 매립하여 패턴을 형성하는 홀 패턴(hole pattern) 형성 방식을 사용하기 때문에 패턴 붕괴 현상 없이 수직형 트랜지스터를 형성할 수 있는 기술을 개시한다. 
       
     수직형 트랜지스터, 하드 마스크, 도트 패턴 방식, 홀 패턴 방식, 패턴 붕괴
Patent KR-20090048804-A (KR)
Inventor: NOH YOUN SUB
IPC: G05F3/20
Filed: 2007-11-12
Abstract: 본 발명은 온도 변화 및 임계전압(Threshold Voltage)의 변화의 조건에서 그리고 공급 전원의 변화 조건에서 트랜지스터에 안정된 전압을 인가할 수 있는 바이어스 회로 및 이를 이용한 증폭기에 관한 것으로, 트랜지스터의 임계 전압과 온도 및 공급 전원의 변화에 대해 이득 특성을 보상하기 위한 바이어스 회로에 있어서, 제1 피드백 저항이 연결된 능동 게이트 바이어스 회로의 제1 트랜지스터의 소스단에 병렬 연결되고, 제2 피드백 저항이 연결되어 있는 제2 트랜지스터를 포함한다. 
       
     바이어스, 회로, 증폭기, 트랜지스터, 보상, 온도, 변화, 전압
Patent KR-20090051978-A (KR)
Inventor: RYU KYUNG ROK
IPC: H01L21/00
Filed: 2007-11-20
Abstract: 반도체 장치의 로그 데이터 분석 장치 및 방법이 개시되어 있다. 반도체 장비의 로그 데이터 분석 장치는 각 반도체 장비에서 발생 된 로그 데이터(log data)를 다운로드 받는 로그 데이터 수집 유닛과, 상기 로그 데이터 수집 유닛에서 수집된 상기 각 반도체 장비의 상기 로그 데이터들을 시간 및 인자(factor)에 따라서 분류 및 비교하는 로그 데이터 비교 유닛 및 상기 로그 데이터 비교 유닛으로부터 분류 및 비교된 결과 데이터를 저장하는 데이터 베이스를 포함한다. 
     본 발명에 의하면, 각 반도체 장비에서 발생된 방대한 로그 데이터를 네트워크를 통해 수집하고, 수집된 로그 데이터를 연산 시스템에 의하여 연산 처리 후 비교 및 분류하여 데이터 베이스화 하여 작업자들이 쉽게 로그 데이터를 이용하여 반도체 장비의 로그 및 이력을 쉽게 파악할 수 있도록 한다.
Patent KR-20090053376-A (KR)
Inventor: SONG KYU HO
IPC: A01K63/04
Filed: 2007-11-23
Abstract: 본 발명은 문어를 장기간 동안 생존한 상태로 넣어 둘 수 있는 수족관에 관한 것이다. 
     본 발명은 수조, 수온조절설비, 물순환설비, 정수설비 및 공기주입설비를 구비한 통상의 수족관에, 수조 내부 바닥에 문어를 담을 수 있는 수용부가 하나 또는 다수개 구비된 것으로서, 상기 수용부는 바닥판 및 측벽으로 구성된 것을 특징으로 하는 문어 수족관을 제공한다. 
       
     수족관, 문어, 연결관
Patent KR-20090054099-A (KR)
Inventor: KOO HAN SEUNG
IPC: H04L12/20
Filed: 2007-11-26
Abstract: 본 발명은 케이블 모뎀에서 중간 주파수를 제어하는 수신 장치 및 방법에 관한 것으로, 광대역 신호를 수신하여 수신한 광대역 신호 전체를 튜닝하여 출력하는 광대역 RF(Radio Frequency) 튜너; 상기 광대역 RF 튜너로부터 수신하는 튜닝된 신호를 다수의 신호로 분배하고 분배한 신호 각각을 주파수 하향하고 결합하여 출력하는 중간 주파수 제어부; 및, 상기 중간 주파수 제어부로부터 중간 주파수가 조정된 아날로근 신호를 수신하여 디지털 신호로 변환하는 아날로그 디지털 변환기를 포함하여 표본 추출 비율(sampling rate)이 상대적으로 낮은 아날로그 디지털 컨버터를 사용할 수 있는 효과를 가진다. 
       
     케이블 모뎀, 채널 본딩, 다운 컨버터, 중간 주파수
Patent KR-20090054209-A (KR)
Inventor: SIN YONG JOO
IPC: B29C70/04
Filed: 2007-11-26
Abstract: 본 발명은 공기식 폴리우레아 방충재의 제조방법에 관한 것으로, 더 상세하게는 폴리우레아 수지층이 도포된 보강포직(補强布織)이나 클로로 술포네이티드 폴리에틸렌 고무시트로 이루어진 원통형 튜브의 바깥둘레에 보강사(補强絲)를 권취하고, 그 외면에 폴리우레아 외피층을 도포함으로서, 고무 가류공정을 수행할 필요가 없어서  전반적인 제조공정이 매우 용이하고, 튜브의 기밀성과 내구성이 크게 향상된 공기식 폴리우레아 방충재의 제조방법에 관한 것이다. 
       
     공기식, 방충재, 폴리우레아
Patent KR-20080080899-A (KR)
Title: Fence based on artificial plant for prevention of jaywalk
Inventor: KIM JONG WOON
IPC: E01F15/02
Filed: 2007-11-29
Abstract: A jaywalking prevention fence using artificial plants is provided to prevent jaywalking effectively, to perform maintenance work conveniently, and to decorate the whole view of the downtown finely and pleasantly. A jaywalking prevention fence(100) using artificial plants comprises a rectangular parallelepiped support(3) fixed on a road surface by an anchor bolt buried under the ground and provided with flowerpot shaped insert grooves(2) at regular intervals, and a standing device(6) with artificial plants(5) set in an artificial flowerpot(4) having the corresponding shape to the insert groove to be installed to the insert groove of the support, wherein the standing device is inserted to the insert groove to prevent jaywalking by the height of the standing device. The support is made of urethane, reinforced resin or PE and provided with a projection(7) and a groove(8) to connect with other supports.
Patent KR-20090056376-A (KR)
Title: Insulator device of shock absorber
Inventor: PARK CHEOL
IPC: F16F9/54
Filed: 2007-11-30
Abstract: An insulator device of a shock absorber is provided to prevent the ride comfort from being degraded in driving on a rough road by varying the hardness of an insulator by injecting fluid into the insulator according to road surface state. An insulator device of a shock absorber comprises: an insulator(10) in which a ring shaped space(16a) in which fluid is flowed or is discharged; a fluid supply device(20) connected to the ring shaped space through a fluid supply line; an ECU(electronic control unit,30) operating the fluid supply device to inject and eject and a gyro sensor(40) enabling the fluid supply device to inject and eject the fluid in the ring shaped space. The fluid supply device comprises: a cylinder(22) which is filled with the fluid; and a piston rod(24) being inserted inside the cylinder or being drawn out from the cylinder.
Patent KR-20090057774-A (KR)
Title: User interface method and set-top box for iptv service
Inventor: LEE SEUNG HA
IPC: H04N21/4725
Filed: 2007-12-03
Abstract: A user interface method for an IPTV(Internet Protocol TV) and an STB(Set-Top Box) thereof are provided to induce interest by displaying thumbnail moving picture information of the selected contents in a preview style. A network interface unit(110) receives thumbnail moving picture information of contents by communicating with an external server. A data processing module(120) encodes or decodes the thumbnail moving picture information. An input signal receiving module(130) receives and processes an input signal according to user operation. A control module(140) stores data processed in the data processing module in a database. The control module parses and transfers the thumbnail moving picture information of the contents to an output module(160) when the contents are selected through the input signal receiving module.
Patent KR-20090058430-A (KR)
Title: Semi active tuned mass damper with lead-rubber bearing and auto brake
Inventor: LEE SANG HYUN
IPC: E04B1/98
Filed: 2007-12-04
Abstract: A semi-active tuned mass damper with a lead-rubber bearing and an electromotive brake is provided to diversify the effective stiffness and effective viscosity of TMD mass installed on an upper part of the brake by controlling only the operating state of the brake. A semi-active tuned mass damper with a lead-rubber bearing and an electromotive brake comprises: a guide rail(210) fixed to a structure(200); a TMD(Tuned Mass Damper) mass(110) installed in order to move along the guide rail; a spring(120) authorizing the elastic force in the TMD mass to the movement opposite direction when the TMD mass moves; and an electromotive brake(116) installed on the bottom of the TMD mass to stop the movement of the TMD mass.
Patent KR-20090060686-A (KR)
Inventor: PARK JUN NAM
IPC: E04F15/10
Filed: 2007-12-10
Abstract: A coupling device for deck assembly is provided to construct and dismantle a floor material for garden or rooftop easily. A coupling device for deck assembly comprises a base rail(10) in which a guide groove(12) is formed on the inner side of a rail groove(11) formed transversely on the top center, a deck connecting cap(30) having a pair of deck guides on a deck joint with a fixing hole on the top of a fixed shaft inserted on the rail groove of the base rail, and a deck(20) with deck fixing grooves(21) on both sides to be combined in the deck joint of the deck connection cap.
Patent KR-20090061202-A (KR)
Title: Apparatus for decreasing nitrogen oxide in diesel engine
Inventor: KIM KIL NAM
IPC: F01N5/02
Filed: 2007-12-11
Abstract: An apparatus for decreasing nitrogen oxide in a diesel engine is provided to reduce the emission quantity of NOx(Nitrogen Oxide) by improving NOx absorption capacity and reduce cost by additionally installing a bypass pipe and a valve. An apparatus for decreasing nitrogen oxide in a diesel engine comprises: a turbocharger(5) installed between a intake pipe(3) an exhaust pipe(4) and of the diesel engine(1); a DPF(Diesel Particulate Filter,6) and an NSC(NOx storage catalyst,7) successively installed at the exhaust pipe; an EGR(Exhaust Gas Recirculation) pipe(9) connecting the rear end of the DPF and an intake part of the turbocharger; an EGR cooler(8) installed at the inlet of the EGR pipe; an EGR valve(14) installed at the outlet of the EGR pipe; An engine control unit(13) controlling the opening degree of the EGR valve; a bypass pipe(10) connecting the front end of the NSC and the EGR cooler; and a throttle valve(11) controlled with the ECU.
Patent KR-20090062875-A (KR)
Title: Control system and method for controlling multimedia broadcast multicast service using a grid service
Inventor: KIM SUNG HEE
IPC: H04W12/06
Filed: 2007-12-13
Abstract: A control system for controlling a multimedia broadcast multicast service by using a grid service and a method thereof are provided to access a control system through a common interface in various mobile communication network environments. A grid service unit(213) configures a workflow for performing MBMS(Multimedia Broadcasting Multicast Service) service processes and controls distribution of the workflow. A service controlling node unit(220a~220n) performs a corresponding MBMS service process according to the workflow distributed from the grid service unit. A proxy node unit(210) relays the MBMS service process. The proxy node unit transmits a final result performed in the service control node unit through a mobile communication network.
Patent KR-20090063561-A (KR)
Title: Plasma display panel and method for manufacturing the same
Inventor: KWON JAE IK
IPC: H01J17/49
Filed: 2007-12-14
Abstract: A plasma display panel and a manufacturing method thereof are provided to improve luminance by condensing a visible light into a direction in which an image is performed. A plasma display panel(200) includes a first substrate, a second substrate, a barrier wall, a first discharge electrode, an electrode sheet, a phosphor layer, a discharge gas, and a first align mark. The first substrate(210) and the second substrate(220) are faced each other. The barrier wall is arranged between the first substrate and the second substrate, and partitions a plurality of discharge cells(230). The first discharge electrode(260) is arranged inside the barrier wall, is extended into one direction between the first substrate and the second substrate, and has a part surrounding the discharge cell. The electrode sheet(240) is separated from the first discharge electrode inside the barrier wall, is extended into one direction between the first substrate and the second substrate, has a part surrounding the discharge cell, and includes a plurality of second discharge electrodes(270). The phosphor layer is arranged on at least one of the first substrate the second substrate. The discharge gas is arranged inside the discharge cell. The first align mark is formed on the electrode sheet.
Patent KR-20090063825-A (KR)
Title: Image processing method and apparatus
Inventor: LEE EUN SIL
IPC: H04N5/217
Filed: 2007-12-14
Abstract: An image processing method and a device thereof are provided to differently apply noise reduction parameters according to a format of an image, thereby improving picture quality. A first value is calculated by using a first weighted value on the current pixel value(S200-S210). A second value is calculated by using a second weighted value on a corrected previous pixel value(S215). The first and second weighted values are fixed values. If an image including the current pixel has an RGB image format, the first and second weighted values are individually applied to RGB channels. The current pixel value is corrected based on the first and second values(S220). The current pixel value is corrected by a value that adds up the first value and the second value.
Patent KR-20080112906-A (KR)
Title: Image forming apparatus
Inventor: SUZUKI WATARU
IPC: G03G15/14
Filed: 2007-12-17
Abstract: An image forming apparatus is provided to suppress transfer error occurring according as a recording material is contacted with an intermediate transfer belt. An image forming apparatus(10) forms an image on a recording material. An image retaining body retains an image. An intermediate transfer belt rotates and moves in a predetermined direction. The intermediate transfer belt faces the image retaining body. The first transfer member(50) transfers the image on the image retaining body to the intermediate transfer belt. The second transfer member(32) transfers the image on the intermediate transfer belt to the recording material.
Patent KR-20090065899-A (KR)
Inventor: SEONG NAK HOON
IPC: H05K3/06
Filed: 2007-12-18
Abstract: 본 발명의 필름 기판 제조방법은 적어도 일면에 양각의 미세 회로 패턴이 형성된 마스터를 준비하는 단계(S110)와, 양각의 미세 회로 패턴과 대응하는 음각의 미세 회로 패턴이 형성되도록 필름 기판에 마스터를 스탬핑하는 단계(S120)와, 마스터를 필름 기판으로부터 제거하는 단계(S130)와, 음각의 미세 회로 패턴에 금속이 충진되게 필름 기판 위로 금속 스퍼터링하는 단계(S140)와, 음각의 미세 회로 패턴에 충진된 금속이 남도록 필름 기판 표면에 있는 스퍼터링된 금속을 제거하는 단계(S150)를 포함한다. 
       
     필름, 기판, 미세, 회로, 양각, 음각, 전도성, 잉크, 마스터, 전주 가공, 액상 수지, 경화
Patent KR-20090066685-A (KR)
Title: 레이저-아크 하이브리드 용접장치 및 용접방법
Inventor: YOON BYOUNG HYUN
IPC: B23K26/20
Filed: 2007-12-20
Abstract: 용접부의 열영향부에서의 입자크기를 작게하여 용접 품질을 향상시킬 수 있도록, 레이저를 조사하는 레이저 헤드와 아크방전을 위한 아크 토치를 포함하는 레이저-아크 하이브리드 용접장치에 있어서, 상기 레이저 헤드는 상기 아크 토치에 평행하게 배치된다. 
       
     레이저, 아크, 평행, 용접부, 용접열영향부
Patent KR-20090067503-A (KR)
Title: Antenna unitted speaker
Inventor: LEE SEOK WOO
IPC: H01Q1/24
Filed: 2007-12-21
Abstract: An antenna integrated speaker is provided to reduce the number of parts by attaching or burying an antenna comprised of a copper film of the predetermined pattern or feed line. An antenna integrated speaker includes a speaker and an antenna(20). The speaker includes a frame(11), a magnet(12), a plate, a voice coil, and a vibration plate. The antenna is attached to the frame of the speaker. The antenna is comprised by attaching the copper film with the predetermined length and shape. The copper film is attached to one of an upper surface or a lower surface of the frame.
Patent KR-20090070243-A (KR)
Title: Apparatus and method for displaying
Inventor: KIM SANG IN
IPC: H04N7/01
Filed: 2007-12-27
Abstract: A display apparatus and a method thereof are provided to enable a user to see the viewing history of an image, which is displayed through a display unit, in OSD(On Screen Display). A scalar(12) changes the resolution of an inputting image, and a display unit(13) displays an image outputted from the scalar. A controller(11) captures an image through the control from the scalar. A memory unit(14) stores a captured image, and the controller controls the display of the captured image in OSD through the display unit.
Patent KR-20090071705-A (KR)
Title: Analog to digital converter using reference voltage selecting circuit
Inventor: YOON KWANG SUB
IPC: H03M1/12
Filed: 2007-12-28
Abstract: An analog to digital converter is provided to reduce power consumption and a chip size by reducing a configuration device using the reference voltage selecting circuit. A voltage divider(100) divides the reference voltage by using a resistor. A reference voltage selecting switch(200) is connected to the output terminal of the voltage divider and varies the output voltage by selecting the reference voltage generated from the voltage divider. A sample-hold switch unit(300) receives an analog input signal and outputs the sampling signal and the hold signal of the analog input signal. A comparator receives the output signal of the sample-hold switch unit and the output voltage of the reference voltage selecting switch unit and compares the output voltage and the output signal. A preamplifier(500) amplifies the output signal according to the comparison result of the comparator and compensates for the error due to the amplification. A switch controller controls the reference voltage selecting switch unit by generating the reference voltage control signal.
Patent KR-20070038509-A (KR)
Inventor: BEUMER RAPHAEL
IPC: A61Q19/08
Filed: 2005-07-01
Abstract: 본 발명은 주름, 피부 노화의 미용 치료 또는 예방, 및/또는 표피의 조밀화를 위한 레티노일 유도체의 용도를 제공한다.
Patent KR-20070062494-A (KR)
Title: Shaft member for dynamic pressure bearing device and method of producing the same
Inventor: YAMASHITA NOBUYOSHI
IPC: B24B5/04
Filed: 2005-08-31
Abstract: Provided are a shaft member for a dynamic pressure bearing device, dimensional accuracy of which is increased at low cost, and method of producing the shaft member. Also provided are a shaft member for a dynamic pressure bearing device, in which dynamic-pressure grooves are highly accurately processed without involving steep rise in processing cost, and a method of producing the shaft member. A shaft blank (10) integrally having a shaft section (11) and a flange section (12) is formed by forging, and the cylindricality of a part of or the entire part of an outer peripheral surface (11a) of the shaft section (11) is corrected. A shaft end surface (11b) of the shaft blank (10) and an end surface (12b), on the opposite side of the shaft, of the flange section (12) are turned with the surface (13) having been subjected to the correction set as the standard. This way a shaft member (2) is produced. The cylindricality of radial bearing surfaces (23a, 23b) formed on the outer periphery of a shaft section (21) of the shaft member (2) is not more than 3 mum. Further, in a common forging process, a shaft blank (110) integrally having a shaft section (111) and a flange section (112) is formed at the same time when thrust dynamic pressure groove regions (112a, 112b) are formed in both end surfaces of the flange (112). After the forging process, in a common form rolling process, radial dynamic pressure groove regions (113a, 113b) are formed in an outer peripheral surface (111a) of the shaft section (111). The radial dynamic pressure groove regions (113a, 113b) and the thrust dynamic pressure groove regions (112a, 112b) are turned in a turning process after the form rolling process.