baber/WOPTO huggingface dataset:
Patent KR-20090029474-A (KR)
Title: Variable gain amplifier having wide gain variation and wide bandwidth
Inventor: DUONG QUOC HOANG
IPC: H03G3/30
Filed: 2007-09-18
Abstract: A variable gain amplifier is provided to secure a wide linear gain variation section of maximum 65dB in a single stage by using a predetermined exponential function. A variable gain amplifier(100) comprises a differential amplifying unit(120) and a gain control unit(110). The differential amplifying unit amplifies an input signal according to a gain control signal. The gain control unit controls a gain of the differential amplifying unit by providing the gain control signal by an approximately exponential function according to a predetermined bias current, and includes a current converter(112), a voltage-current converter(111), and a bias circuit(113). The current converter converts a current level of a predetermined control signal into a current level of the gain control signal. The voltage-current converter converts a voltage level of the control signal into a current level of the control signal. The bias circuit supplies a bias current to the voltage-current converter.
Patent KR-20080027149-A (KR)
Title: Frequency domain equalizer with one dominate interference cancellation for dual antenna radio
Inventor: JUNQIANG LI
IPC: H04B7/005
Filed: 2007-09-19
Abstract: A frequency domain equalizer having one dominate interference cancellation for a dual antenna radio is provided to produce coefficients of an equalizer with ease and reduce time consumption by the improved method for determining the equalizer coefficients. An RF(Radio Frequency) receiver operating method comprises the following steps of: converting a first desired signal time domain channel estimate into a frequency domain with respect to a first diversity path; converting a first interference signal time domain channel estimate into a frequency domain(1110); converting a second desired signal time domain channel estimate into a frequency domain; converting a second first interference signal time domain channel estimate into a frequency domain; producing first and second frequency domain equalizer coefficients with respect to a second diversity path(1116); converting the first and second frequency domain equalizer coefficients into a time domain(1118); and equalizing first and second desired signal time domain data symbols of the first and second time domain signals by using the first and second time domain equalizer coefficients.
Patent KR-20090031113-A (KR)
Title: Method and apparatus for creating a 3d image using 2d photograph images
Inventor: LEE HEE SAE
IPC: G06T15/20
Filed: 2007-09-21
Abstract: A method for generating a 3D image by using a plurality of 2D real images and an apparatus therefor are provided to produce the 3D image by generating a 2D panorama based on the 2D real images and folding the 2D panorama image based on the image information within the 2D panorama image. A dividing unit(110) receives 2D real images, and divides the 2D real images along the lines corresponding to the vertical edges of each object within the 2D real images. A rotation/unfolding unit(120) vertically rotates the lines which forms the divided parts of the 2D real images so as to parallel to each other, and then unfolds the divided parts. A deleting unit(130) deletes a divided part which has at least one loss surface among the divided parts of the 2D real images which are rotated and unfolded by the rotation/unfolding unit.
Patent KR-20090031142-A (KR)
Title: A method for providing gui to display related contents when contents are made by user, and a multimedia apparatus thereof
Inventor: KIM HYUN JIN
IPC: G06F17/30
Filed: 2007-09-21
Abstract: A method for providing GUI to display related contents and a multimedia apparatus applying the same are provided to add the related contents by scrapping the related contents by automatically searching for the related contents while a user generates the content. A contents generation window(400) displays the currently generated multimedia contents. A related contents window(450) displays the currently generated contents and the related contents in the contents generation window. If an arrow displayed beside the related contents of the related contents window is clicked, other related contents are displayed. If the related contents are a photograph(460) or a moving images(480), thumbnail is generated by reducing the photograph or the thumbnail or the reduced thumbnail is displayed by extracting the specific part of the screen or the initial part of the moving picture. If the related contents are music, the file name of the music file is displayed in the related contents window.
Patent KR-20090034168-A (KR)
Title: Semiconductor device and method of manufacturing the same
Inventor: BYUN KI YEOL
IPC: H01L21/8247
Filed: 2007-10-02
Abstract: A semiconductor device and manufacturing method thereof are provided to prevent the interference between the neighboring floating gates by forming the oxide pattern different having different etch selectivity through re-oxidation. Provided is the substrate(100) including the first insulating layer and conductive patterns. The first oxide film is formed in the surface of conductive patterns through the oxidation process. The second oxide film is formed between conductive patterns. The recess process is performed on the first oxide film and the second oxide film. The first oxide pattern(146) and the second oxide pattern(156) are formed on the device isolation pattern. The second insulating layer(160) and conductive film(170) are formed on the conductive patterns, the first oxide pattern and the second oxide pattern.
Patent KR-20090034502-A (KR)
Title: System and method for load and unload job processing and realtime monitoring based on rfid
Inventor: SONG BYUNG JUN
IPC: G06K17/00
Filed: 2007-10-04
Abstract: A system and a method for load and unload job processing and real time monitoring based on RFID(Radio Frequency ID) are provided to compare tag information sensed by an RFID reader with information to be loaded and unloaded to automatically identify a container, distinguish, verify and monitor a location of a container. An RFID reader(150) is installed at a crane(140). An RFID tag(160) is installed at a transport vehicle(130) and a container(110). A smart device(170) enables a person who loads and unloads to manage a loading or unloading work and monitor a work result in real time. A loading or unloading workplace(100) transmits sensing information of the RFID tag to a managing room of loading or unloading and enables a worker to monitor a work result in real time. The managing room of loading or unloading receives EPC(Electronic Product Code) information based on sensing information of the RFID tag from the loading or unloading workplace, manages loading or unloading and monitors a loading or unloading work in real time. The managing room of loading or unloading transmits loading or unloading management information to a ship company and a cargo owner in real time. An AP(Access Point)(300) relays wireless communication between the managing room of loading or unloading and a smart device.
Patent KR-20090036292-A (KR)
Title: System and method for managing stock
Inventor: KANG JAE GOO
IPC: G06Q10/08
Filed: 2007-10-09
Abstract: An article management system and a method thereof are provided to trace the location where an article is loaded, accurately by using a portable terminal and register/inquire articles in the spot by reading out RFID tags attached to the articles. At least one or more locators(101-104) periodically transmit a broadcasting message including locator information. At least one or more article tags(200) form an IC chip for RFID and are attached to articles. A terminal(300) includes a location tag, which includes information about the RSSI of the broadcasting message, in the locator information, receives the article tag information from the article tag, and then provides the received article tag information to an article management server(500). The article management server generates the location information of the terminal by using the locator information and RSSI information and manages the article information.
Patent KR-20070109966-A (KR)
Title: Drawer type safe
Inventor: LEE JIN KYU
IPC: E05B65/44
Filed: 2007-10-09
Abstract: A drawer type safe is provided to expose an authentication panel to the outside by leasing acceptance state, and unlock locked state of a drawer by authenticating a PIN code through the authentication panel. A drawer type safe will be described. The drawer type safe includes a drawer(10), a main body(40) which accepts the drawer, an authentication panel(24) which is formed in the drawer and has the authentication button, locking material(82) which maintains locked condition of the drawer to the main body, and catching material(66) which maintains acceptance condition of the drawer to the main body. If the drawer receives pressure in opposition to the direction that the drawer is projected, the authentication panel is exposed to the outside by removing acceptance condition by working of catching material(66). If authentication is succeeded through the authentication panel, locked condition of the drawer is unlocked by working of locking material(82). Since the drawer is projected to the outside of the main body by unlocking the unlocked condition, the problem for security is solved.
Patent KR-20090036670-A (KR)
Title: Apparatus and method for envelope tracking power amplifier in wireless communication system
Inventor: KIM BYUNG WOOK
IPC: H04B1/04
Filed: 2007-10-10
Abstract: An apparatus and a method for envelope a tracking power amplifier in a wireless communication system are provided to increase the accuracy of time arrangement by accurately measuring the time delay difference among paths independently. When measuring the time delay of an envelop signal path, a baseband signal controller(102) outputs an envelop signal to the envelop signal path. The baseband signal controller outputs a signal of which envelop size is uniform to the baseband signal path. When measuring the time delay of the baseband signal path, the baseband signal controller outputs a signal of which envelop size is uniform to the envelop signal path. The baseband signal controller outputs a baseband signal to the baseband signal path. A time delay difference measurement unit(109) calculates the correlation coefficient as to the envelop signal path and the baseband signal path. Therefore, the time delay of each path is measure. By using the time delay difference, a signal time controller(105) sets up time delay at a correspondent path.
Patent KR-20090038202-A (KR)
Title: Electric metering pump apparatus
Inventor: JANG DONG WON
IPC: B67D7/58
Filed: 2007-10-15
Abstract: An electrical liquid injection pump device is provided to prevent the discharging liquid from being flowed out as the discharge control is an electrical type. An electrical liquid injection pump device comprises: a liquid discharging pump(4) having a metering block(16) and a valve control block(18), fixed at a stand(2) front surface; a transfer guider(6) guiding a chamber rod(14) operating in a measuring cylinder chamber of the metering block; a drive motor(80) installed at the stand back side; and a chamber rod driving part(8) running the chamber rod. The stand has a controller controlling the drive of the drive motor and to the pneumatic operation of the valve control block. A change valve making an inlet port(20) and an outlet(22) at the measuring cylinder chamber inside according to the pneumatic operation of the valve control block.
Patent KR-20080075435-A (KR)
Title: Mat for golf practice
Inventor: YOON DAE WON
IPC: A63B69/36
Filed: 2007-10-15
Abstract: A mat for golf practice is provided to absorb shock applied to a first plate effectively though a golfer impacts a golf ball on the mat by a golf club strongly, and to improve the golfer's technique conveniently by enabling the golfer to adjust an incline of the mat simply. A mat for golf practice includes: a first plate(110); a second plate(120) arranged to be spaced from the first plate; and a shock-absorbing part(130) installed between the first plate and the second plate. The shock-absorbing part comprises an elastic member(132) arranged between the first plate and the second plate, and a fixing member(136) for connecting the first and second plates in the state of being mutually spaced.
Patent KR-20080036924-A (KR)
Title: Light diffusing resin composition
Inventor: KANAYA HIROKO
IPC: F21V5/00
Filed: 2007-10-18
Abstract: A light diffusing resin composition, a light diffuser plate comprising the composition, a surface light source unit containing the light diffuser plate, and a transmissive imaging device containing the surface light source unit are provided to improve color reproducibility. A light diffusing resin composition comprises a transparent resin; 0.1-10 parts by weight of a light diffuser based on 100 parts by weight of the transparent resin; and 0.00001-0.01 parts by weight of a dye which has a maximum absorption wavelength (lambda_max) in the range of 470-520 nm or 570-610 nm and a maximum fluorescence wavelength (lambda_Pmax) in the range of 520-570 nm or 610-700 nm, based on 100 parts by weight of the total amount of the transparent resin and the light diffuser.
Patent KR-20090039954-A (KR)
Title: Mobile terminal and mehod of uploading data therein
Inventor: JEONG KYE SOOK
IPC: H04M1/72445
Filed: 2007-10-19
Abstract: A data upload method of a mobile terminal and a mobile terminal uploading stored data on website is provided to reduce charging according to the connection of a web site by releasing web site access. A camera(121) takes a picture of image. A memory(160) stores data. A display unit indicates the stored data. A user input unit(130) performs the selection of data uploaded to website and upload information input of data among the stored data. A wireless communications unit transmits data for uploading the selected data. In case the upload of the selected data is completed, a controller controls so that connection with website be automatically canceled.
Patent KR-20090040977-A (KR)
Title: Antifire fabrics using clothes of extinguish a fire
Inventor: YANG SUNG CHUL
IPC: D06M17/00
Filed: 2007-10-23
Abstract: Flame resisting fabric used for fire fighting clothes is provided to improve reliability and satisfaction of a user by offering superior physical toughness, fire-retardant and water resistance property. Flame resisting fabric used for fire fighting clothes comprises the followings: an external shell textile(100) having rub resistance and heat resistance by forming an outer surface of the clothes; a moisture isolating material(110) preventing penetration of moisture into the clothes; an inner layer(120) made with a nonwoven fabric material having insulating property; an intermediate layer(130); a heat liner(200) including a surface layer(140); and a reinforcing member layer formed to improve physical toughness.
Patent KR-20090042600-A (KR)
Title: A method for heterologus kidney perfusion using directed hemoperfusion system
Inventor: WOO HEUNG MYOUNG
IPC: A61M25/00
Filed: 2007-10-26
Abstract: A heterotopia renal perfusion method is provided, in which the blood can be flowed to the kidney by connecting blood vessel of the donor kidneys and blood vessel of a presenter. A heterotopia renal perfusion method comprises: a step for anesthetizing a donor and a receiver; a step for mounting the cannula in the jugular vein and artery of the receiver and the renal vein and renal artery of the donor; and a step for flowing the blood of the receiver in the kidney of the donor by connecting a tube to the cannula.
Patent KR-20090043109-A (KR)
Inventor: WOO HYUNG JOO
IPC: H01L21/20
Filed: 2007-10-29
Abstract: 본 발명은 이온 주입에 의한 ion-cut 기술 및 웨이퍼 접합 기술을 이용한 실리콘 웨이퍼 상의 단결정 GaAs 박막 제조 방법에 관한 것으로, 그 목적은 이온 주입에 의한 ion-cut 기술과 웨이퍼 접합 기술을 이용하여 실리콘 웨이퍼와 결합된 격자 결함이 거의 없는 GaAs 단결정 박막을 제조하는 방법을 제공하는 데 있다. 본 발명의 구성은 실리콘 웨이퍼 상에 단결정 GaAs 박막을 형성하는 방법에 있어서, GaAs 웨이퍼의 박리를 위해 이온을 GaAs 웨이퍼에 조사하는 이온 주입단계와; 이온 주입단계 전 또는 후에 GaAs 웨이퍼에 실리콘 웨이퍼와의 버퍼 층으로 사용될 산화실리콘층을 형성하는 단계와, 이후 GaAs 웨이퍼와 실리콘 웨이퍼를 세정하는 단계와, 이후 GaAs 웨이퍼와 실리콘 웨이퍼를 서로 맞붙여 놓고 중앙에 압력을 가하여 접합하는 단계로 이루어진 웨이퍼 접합단계와; 접합된 GaAs 웨이퍼와 실리콘 웨이퍼를 열처리하여 이온 조사된 GaAs 웨이퍼를 박리시키는 단계;를 포함하는 것을 특징으로 하는 이온 주입에 의한 ion-cut 기술 및 웨이퍼 접합 기술을 이용한 실리콘 웨이퍼 상의 단결정 GaAs 박막 제조 방법을 그 기술적 사상의 특징으로 한다. 
       
     Ion-cut, 이온 주입, 웨이퍼 접합, GaAs 박막
Patent KR-20090043134-A (KR)
Inventor: BUNKER RONALD SCOTT
IPC: F28F13/12
Filed: 2007-10-29
Abstract: 열전달 장치(18)는 제 1 유체(19)와 제 2 유체(32)를 분리하도록 구성된 복수의 열전달 벽(46)을 포함한다.  열전달 증대 시스템(44)은 하나 이상의 열전달 벽(46)에 제공된다.  열전달 증대 시스템(44)은 결합 매체를 사용하여 하나 이상의 열전달 벽(46)에 결합되는 복수의 미세 난류성 입자(48)를 포함한다.
Patent KR-20090045658-A (KR)
Inventor: JANG BONG GUN
IPC: A61P7/02
Filed: 2007-11-02
Abstract: 본 발명은 블랙쵸크베리 추출물을 함유하는 항산화제, 항혈소판제, 항동맥경화제 및 기타 심혈관계 질환 치료용 조성물 및 상기 조성물을 함유하는 음료를 제공한다.  상기한 본 발명에 의한 조성물은, 혈소판 항산화 및 항혈소판 효과가 있으며 산화성 스트레스 완화를 통한 심혈관계 질환 치료용으로 이용가능하며 동맥경화증에 유용한 이점이 있다. 
       
     블랙쵸크베리, 심혈관, 항혈소판, 항산화, 동맥경화
Patent KR-20090047749-A (KR)
Inventor: KIM GYEONG RAN
IPC: G06F15/02
Filed: 2007-11-08
Abstract: 본 발명은 대형의 터치스크린 방식 전자칠판에 관한 것으로, 전자칠판으로서의 기능은 물론이고 컴퓨터(PC)를 일체화하여 활용하는 기능과 TV수신, 인터넷, 외부 영상 및 음성 등을 입력하여 디스플레이하는 기능 등 여러 가지 교육에 유용한 기능을 통합적으로 갖는 전자칠판에 관한 것이다. 
     전자칠판을 구성함에 있어서, 대형인 화면크기 전체에 터치스크린(2)을 적용하는데, 경전용량의 변화나 압력의 변화를 인지하여 좌표값을 측정하는 필름을 이용한 터치스크린이나, 리드아웃 IC 반도체 터치스크린 기술을 이용하며, 내부장치로는 컴퓨터 기능을 구동하기 위한 중앙처리장치(11)와 하드디스크(12)로 구성되는 컴퓨터구동부(10)와 터치스크린 기능을 담당하는 터치스크린구동부(100)를 가지며, 케이스(3)의 임의의 위치를 선택하여 카메라(4)와 스피커(5)를 설치한 후 중앙처리장치(11)와 연결하며, 인터넷인터페이스(6)를 구성하여 인터넷을 사용가능토록 한 것을 특징으로 한다. 
     
     전자칠판, 리드아웃 IC 반도체, 터치스크린, 컴퓨터 구동, 무선통신, 인터넷
Patent KR-20090049444-A (KR)
Inventor: GU BON HYEOK
IPC: C08J5/24
Filed: 2007-11-13
Abstract: 프리프레그, 및 상기 프리프레그를 채용한 금속박 적층판과 프린트 배선판이 개시된다. 개시된 프리프레그는, 기재 및 상기 기재에 함침된 액정 고분자 수지를 포함하고, 상기 액정 고분자 수지의 함침율이 상기 기재 및 액정 고분자 수지의 중량 합계를 기준으로 44 내지 52중량%인 것을 특징으로 한다. 
     따라서, 개시된 프리프레그는 액정 고분자 수지 및 최적화된 수지 함침율을 사용하여 기재의 표면 상에 형성한 적정 두께 범위의 액정 고분자층을 구비함으로써, 금속 박막과의 접착성이 향상되고 저유전 특성을 가질 수 있다. 또한, 상기 프리프레그를 채용한 금속박 적층판 및 프린트 배선판은 열변형 등으로 인한 금속 박막의 박리 현상이 발생하지 않으며, 고주파 영역에서 저유전 특성을 갖는다.
Patent KR-20090050535-A (KR)
Inventor: KIM JU HYUN
IPC: H01L27/146
Filed: 2007-11-16
Abstract: 실시예에 따른 이미지 센서는, 트랜지스터를 포함하는 반도체 기판; 상기 반도체 기판 상에 배치된 층간 절연막; 상기 층간 절연막을 관통하여 단위픽셀 별로 배치된 금속배선; 상기 금속배선 사이의 층간 절연막에 배치된 제1 전극; 상기 금속배선과 연결되도록 상기 층간 절연막 상에 배치된 하부 전극; 상기 하부 전극과 갭 영역을 가지도록 배치되고 상기 제1 전극과 대응되는 위치의 상기 층간 절연막 상에 배치되는 제2 전극; 및 상기 하부 전극 및 제2 전극을 포함하는 층간 절연막 상에 배치된 포토 다이오드를 포함한다. 
       
     이미지 센서, 포토다이오드, 전극
Patent KR-20090051395-A (KR)
Inventor: YOO BYUNG KU
IPC: G06Q40/04
Filed: 2007-11-19
Abstract: 본 발명은 가상주식 거래 방법 및 시스템과 이를 위한 기록매체에 관한 것으로서, 본 발명에 따른 가상주식 거래 방법은, 가상주식 거래를 지원하는 서버에서 복수의 고객단말들로부터 가상주식 매입의뢰 요청 정보를 수신하면, 상기 수신된 가상주식 매입의뢰 요청 정보들을 확인하여 동일한 가상주식별로 분류한 후, 각각 분류된 가상주식 매입의뢰를 집계하여 최소거래 주수에 도달하는지 확인하는 단계와, 확인결과, 최소거래 주수에 도달한 가상주식 매입의뢰 요청이 확인되면, 서버에서 증권사 서버로 상기 가상주식에 대응하는 실제 주식 매입을 의뢰하는 단계와, 상기 매입 의뢰된 실제 주식이 상기 가상주식 거래를 지원하는 서버의 운영 회사 또는 관리 회사 명의의 증권계정으로 입고 처리되면, 상기 서버에서 상기 입고 처리된 실제 주식의 매입을 의뢰한 고객들이 제각기 지정한 가상주식 계정을 확인한 후, 상기 확인된 가상주식 계정으로 상기 실제 주식에 대응하는 가상 주식을 입고 처리하는 단계 및 상기 서버에서 상기 가상주식 계정에 입고 처리된 내역을 상기 가상주식 매입의뢰 요청 고객들에게 통지하는 단계를 포함한다. 
       
      가상주식, 주식거래
Patent KR-20090051466-A (KR)
Inventor: PARK SUNG SU
IPC: C12Q1/68
Filed: 2007-11-19
Abstract: 본 발명은 타겟 유전자가 파괴된 캔디다 알비칸스를 예쁜꼬마선충의 먹이로 제공하는 것을 포함하는 캔디다 알비칸스의 병원성 유전자 스크리닝 방법에 관한 것으로, 배양이 용이하고 육안으로도 생존 여부 관찰이 용이한 예쁜꼬마선충을 이용함으로써 스크리닝 과정이 간단하고 용이하며 시간을 단축시킬 수 있는, 캔디다 알비칸스의 병원성 유전자 스크리닝 방법에 관한 것이다. 
       
     예쁜꼬마선충, 캔디다, 알비칸스, 병원성, 스크리닝
Patent KR-20090055226-A (KR)
Title: Falling down method of floating concrete block manufactured on the sea
Inventor: LEE JAE YEON
IPC: E02B3/20
Filed: 2007-11-28
Abstract: A turning method of a marine manufactured floating concrete block is provided to become the floating state using the floating concrete block made with the size simple and which rapidly desires in resolution. A turning method of a marine manufactured floating concrete block comprises a step of dismantling the block supporter(360) and the buoyancy member(210) which supports the floating concrete block(100); a step of conducting the floating concrete block it connects the pull rope in the top end portion of the floating concrete block and bottom part; and a step of ejecting through the drainpipe(600) the seawater filled with the inner hollow(S) of the floating concrete block.
Patent KR-20090056413-A (KR)
Title: Cooling line for hybrid vehicle
Inventor: KIM KYUNG HA
IPC: B60K6/22
Filed: 2007-11-30
Abstract: A cooling line of a hybrid vehicle is provided to improve durability of a driving motor because a driving motor and a transmission are cooled down through a first cooling line unit and an inverter and a generator are cooled down through a second cooling line unit. A cooling line of a hybrid vehicle comprises a first cooling line unit(100) which is installed between a transmission cooler(10) and a driving motor(20) or a transmission(30); and a second cooling line unit(200) which cools down via an inverter(50) and a generator(80). The oil supplied from the transmission cooler through the first cooling line unit is re-circulated to the transmission cooler via the drive motor and transmission. The cooling water supplied from a hybrid cooler(40) through the second cooling line unit moves through a different passage from the passage wherein the drive motor and the transmission are installed.
Patent KR-20090056482-A (KR)
Title: Routing method for wireless network based on relay probability
Inventor: JIN GWANG JA
IPC: H04L12/28
Filed: 2007-11-30
Abstract: A message delivering method based on the relay probability in a wireless network is provided to improve the throughput per node and remove a message loop by making each wireless node calculate the relay probability and determining a node for relaying a message based on the calculated result. A transmission request signal is sent to neighboring nodes. The neighboring nodes determine responses to the request based on each message relay probability. The response signals are received from the neighboring nodes. A relay node is determined among the neighboring nodes. In case any response signal is not received from the neighboring nodes, the message is directly transmitted to a destination node.
Patent KR-20090058258-A (KR)
Title: Web-based analytic method of educational measurement and its system
Inventor: BYUN DU WON
IPC: G06Q50/20
Filed: 2007-12-04
Abstract: A web-based analysis method of educational evaluation and a system thereof are provided to analyze an evaluation result through an intrinsic method after educational evaluation by using an internet. Students(18,19,20,21) connect to a web server(16) through an internet to request evaluation. If the web server requests an evaluation paper that the student selects to a database server(14), the evaluation paper is extracted from an evaluation question database(11). If the student informs the end of the evaluation to the web server, the web server transmits an answer of the student to a data processing system(15).
Patent KR-20090004368-A (KR)
Title: Golf club heads with a plurality of stress zones and methods to manufacture golf club heads
Inventor: MORALES ERIC J
IPC: A63B53/04
Filed: 2007-12-07
Abstract: A golf club head and a manufacturing method for the same are provided, which optimize the weight center of the golf club head and increase the moment of inertia. A golf club head comprises: a main body(110) having toe end part, heel end, front end, rear end, face part, top wall part and bottom wall part, and the top wall part and bottom wall part; a first area which is formed of more than one hole in at least one of the top wall part and bottom wall part and is extended between the bell shape curve and rear end; and a second part extended between the end part and bell-shaped curve.