baber/WOPTO huggingface dataset:
Patent KR-20060115495-A (KR)
Title: Circuit of sense amplifier for memory device
Inventor: KIM DONG KEUN
IPC: G11C7/06
Filed: 2005-05-06
Abstract: A sense amplifier circuit of a memory device is provided to enable high speed operation of the memory device by reducing tRP(RAS precharge time). In a sense amplifier circuit of a memory device, a sense amplifier(200) is shared by adjacent first and second memory cell array blocks. A first equalization unit(400) equalizes the voltage levels of a bit line pair connecting the first memory cell array block and the sense amplifier in response to a first signal. A second equalization unit(400a) equalizes the voltage levels of a bit line pair connecting the second memory cell array block and the sense amplifier in response to a second signal. A third equalization unit(400b) equalizes the voltage levels of a bit line pair connecting a second isolation unit(100a) and the sense amplifier in response to a third signal. A first isolation unit(100) and the second isolation unit isolate the bit line pair connecting the first and second memory cell array blocks and the sense amplifier, respectively. The first equalization unit and the second equalization unit are independently driven by the first signal and the second signal, respectively.
Patent KR-20060119364-A (KR)
Title: Loader arm
Inventor: KANG BYUNG SUCK
IPC: H01L21/68
Filed: 2005-05-20
Abstract: A wafer transfer loader arm is provided to improve productivity and to prevent contamination or damage of a wafer by preventing the impact between the loader arm and a cassette or between the loader arm and a loadlock chamber using an U type front structure. A wafer transfer loader arm is used for adsorbing a wafer from a wafer cassette and transferring the wafer to a loadlock chamber. The wafer transfer loader arm includes a body portion, a rear portion and a front portion. The rear portion(12) of the wafer transfer loader arm is fixed to a transfer robot. The front portion(13) is formed like an U type structure. The size of the front portion is smaller than that of the wafer. The rear portion and the front portion are connected with each other through the body portion.
Patent KR-20060109236-A (KR)
Title: Ball marker
Inventor: ON SUN KI
IPC: A63B57/00
Filed: 2005-05-20
Abstract: Provided is an easy detachable ball marker for golf with simple structure using magnetic and various patterns for easy carrying, improved recognizing property, and good appearance. The ball marker is provide to detach and attach it easily in the state of wearing golf gloves and to recognize and identify it easily by using its various patterns. The ball marker for golf with simple structure using magnetic and various patterns includes an upper part(100) comprising nonmagnetic material and a lower part comprising magnetic material, which is incorporated to the bottom side of the upper assembly. The various patterns of the upper part(100) are formed by mixing dyes with ceramic, Formica, or plastics. The magnetic material of lower part is easily detachable from a clip located in a belt or cap of a user.
Patent KR-20060120765-A (KR)
Title: Method for manufacturing a semiconductor device
Inventor: KIM YUNG JUN
IPC: H01L21/20
Filed: 2005-05-23
Abstract: A method for manufacturing a semiconductor device is provided to secure the uniformity of a single crystal silicon structure by removing properly protrusions from a second single crystal silicon layer. An amorphous silicon layer is formed on a first single crystal silicon layer(200). A second single crystal silicon layer(220) is formed on the resultant structure by transforming the amorphous silicon layer into a single crystal structure. At this time, a plurality of protrusions(222) are formed on the second single crystal silicon layer. The plurality of protrusions are then removed from an upper surface of the second single crystal silicon layer.
Patent KR-20060125331-A (KR)
Title: Eva sponge contained aluminium hydroxide-manganese nano mixture and process for preparation of the same
Inventor: KIM WON CHEL
IPC: C08J9/04
Filed: 2005-06-02
Abstract: Provided are an ethylene-vinyl acetate sponge containing an aluminum hydroxide-manganese nano-mixture which radiates far infrared rays and is excellent in antibacterial effect and deodorizing effect, and its preparation method. The ethylene-vinyl acetate sponge comprises 100 parts by weight of an ethylene-vinyl acetate resin; 2.0-5.0 parts by weight of zeolite; and 2.0-10.0 parts by weight of an aluminum hydroxide-manganese nano-mixture. The aluminum hydroxide-manganese nano-mixture comprises 30-70 wt% of aluminum hydroxide; and 30-70 wt% of manganese. Preferably the aluminum hydroxide and the manganese have a particle size of 100-800 nm; and at least one selected from the group consisting of perlite, celite, white carbon, active carbon and alginic acid can be used instead of zeolite.
Patent KR-20060048243-A (KR)
Inventor: HIDAKA ISAO
IPC: H04J99/00
Filed: 2005-06-08
Abstract: 본 발명은 무선 통신에 있어서 주파수대역의 이용을 제한하고, 또한 데이터 분리 처리의 복잡화를 완화하면서, 전송 레이트를 향상시키기 위한 것으로서, 상기 목적을 달성하기 위한 해결 수단에 있어서, 안테나(101, 102, 210 및 202)로부터의 수신 데이터는 RF 회로(311, 312, 321 및 322)를 통하여 수신부(300)에 공급된다. 수신부(300)는 다른 주파수대의 MIMO 수신부(330 및 360)를 구비하고 각각의 주파수대에 있어서 MIMO에 의한 복조를 행한다. 송신시에는, 송신부(400)에서 다른 주파수대의 MIMO 송신부(430 및 460)이 각각의 주파수대에 있어서 MIMO에 의한 변조를 행한다. 변조된 신호는 RF 회로(411, 412, 421 및 422)를 통하여 안테나(101, 102, 210 및 202)로부터 출력된다. 
       
     통신 시스템, 송신 장치, 수신 장치
Patent KR-20060128110-A (KR)
Title: Field emission surface light source
Inventor: JUNG KYEONG TAEK
IPC: G02F1/13357
Filed: 2005-06-08
Abstract: A field emission type of surface light source is provided to use an electric field emission source in a triode structure for simplifying emission of electrons from an electric field emission source such as a carbon nano tube and increase luminance under a same voltage. A field emission type of surface light source includes a first substrate(110) having a plurality of channels(111), in which conductive reflection layers(112) and fluorescent layers(113) are stacked on inner peripheral surfaces. A plurality of field emission sources(120) are inserted into the channels. A second substrate(140) has a plurality of discharging spaces independently formed by the channels. Frits(130) are inserted between the first and second substrates for sealing the discharging spaces from the outside. The field emission sources are formed of Ni metal rods and electric field layers such as carbon nano tubes grown around the metal rods.
Patent KR-20070002133-A (KR)
Title: A composition of skin external application
Inventor: CHO JUN CHEOL
IPC: A61K8/64
Filed: 2005-06-30
Abstract: A skin external composition is provided to increase production of tropoelastin in the skin, and productions of collagen and fibrilin in the dermis layer, so that the composition is useful for skin wrinkle improvement, skin elasticity enhancement, and skin moisturizing increase. The skin external composition for improving skin wrinkle, enhancing skin elasticity and increasing skin moisturizing comprises a mixture containing palmitoylpentapeptide, soybean embryo isoflavone aglycon, extract of Medicago sativa and extract of Iris florenti, wherein the palmitoylpentapeptide is prepared by binding a palmitoyl group to 5 amino acid chain molecule(Lys-Thr-Thr-Lys-Ser) corresponding with the protein base of collagen; the soybean embryo isoflavone aglycon is selected from genistin, daidzin, glycitin, genistein, daidzein and glycitein; and the amounts of palmitoylpentapeptide, soybean embryo isoflavone aglycon, extract of Medicago sativa and extract of Iris florenti are 0.001-20 wt.%, 0.001-20 wt.%, 0.001-20 wt.% and 0.001-20 wt.%, respectively.
Patent KR-20070005110-A (KR)
Title: A nailing anchor device for soil reinforcement
Inventor: SIM SEK RYE
IPC: E02D5/80
Filed: 2005-07-05
Abstract: A nailing anchor device for slope reinforcement is provided to support the ground strongly without separation of nails and anchor blades by fixing an opening device on the front of a nail and fixing an anchoring device provided with plural anchor blades on the front of the opening device. A nailing anchor device(1) for slope reinforcement comprises: an opening device(10) installed to the front of a nail(2) and provided with an opening plane(12) formed in the triangular conic shape on the front of a cylindrical body(11) to make the body cover up the front of the nail; and an anchoring device(20) fixed to the front of the opening device and provided with plural blade fixing pieces(23) formed on the top of an anchor body(21) at equal angles from a circulating hole(22), and anchor blades(24) installed on each blade fixing piece by a shaft(25) to make the blade fixing pieces spread outward.
Patent KR-20070006435-A (KR)
Title: Method for forming gate of flash memory device
Inventor: HYUN CHAN SUN
IPC: H01L27/115
Filed: 2005-07-08
Abstract: A method for forming a gate of a flash memory device is provided to decrease the number of fabricating processes and minimize an open region of a dielectric layer by forming an open region of a dielectric layer in the center of a source/drain select line while using a BARC(bottom anti-reflective coating) slope etching method and a poly slope etching method. A tunnel oxide layer(102), a conductive layer(104) for a floating gate, a dielectric layer(106) and a first polysilicon layer(108) having a thickness of 800~1200 angstroms are sequentially formed on a semiconductor substrate(100). After a BARC is formed on the first polysilicon layer, the BARC in the center of a region for forming a source/drain select line, the first polysilicon layer and the dielectric layer are sequentially removed. The BARC can be removed to have a slope so that the CD of the first polysilicon layer is adjusted. Polysilicon is filled to form a second polysilicon layer(114), and a planarization process is performed. A tungsten layer(116) is formed on the resultant structure. A gate line is simultaneously formed in a cell region, a source/drain select region and a peripheral circuit region by a gate hard mask process and an etch process.
Patent KR-20070007552-A (KR)
Title: A dish washer and method of controlling the same
Inventor: SON RO MON
IPC: A47L15/00
Filed: 2005-07-11
Abstract: A dish washer and a control method thereof are provided to display the dish washer driven time reflecting the difference of regions for using the dish washer and water supplying environments, and to accurately show users information about the driven time. In a dish washer, a water supply measuring system comprises: a water supply sensing unit(600) for detecting the amount of cleaning water; a control unit(500) for regulating openness of a water supply valve by receiving the flow amount of cleaning water detected by the water supply sensing unit and measuring the time for supplying water; a display unit(700) for showing the water supply time measured by the control unit; and a memory unit(800) for memorizing the measured water supply time. The water supply sensing unit is mounted at the inner side of one side of an air brake as a flow-meter so as to detect the flow amount of supplied water by rotating due to water pressure of the supplied cleaning water.
Patent KR-20070010923-A (KR)
Title: Non volatile memory devices having a three-transistor memory cell and methods of fabricating the same
Inventor: JEON HEE SEOG
IPC: H01L27/115
Filed: 2005-07-20
Abstract: An NVM(non-volatile memory) device having a 3-transistor memory cell is provided to make an interval between a cell gate pattern and a select line become smaller than the resolution limit of a photolithography process by properly adjusting the thickness of a spacer layer for forming second sacrificial spacers. A source region and a drain region(36b) are formed in a semiconductor substrate, separated from each other. A source select line(SSL) and a drain select line(DSL) is formed on the semiconductor substrate between the source region and the drain region, respectively adjacent to the source region and the drain region. A cell gate pattern is disposed between the source select line and the drain select line. A first floating impurity region is formed in the semiconductor substrate under a gap region between the source select line and the cell gate pattern. A second floating impurity region is formed in the semiconductor substrate under a gap region between the drain select line and the cell gate pattern. The interval between the cell gate pattern and the select line is smaller than that width of the select line. A floating gate(FG), an inter-gate dielectric and a wordline pattern are sequentially stacked in the cell gate pattern, and the select line is made of a single conductive layer.
Patent KR-20070010936-A (KR)
Title: Film type antenna and manufacturing method thereof
Inventor: KANG KI YEOUL
IPC: H01Q1/32
Filed: 2005-07-20
Abstract: A film type antenna and a manufacturing method thereof are provided to reduce manufacturing cost by using aluminum for a conductive circuit pattern. An aluminum thin layer(20) is bonded by dry laminating on a film type sheet(10). An adhesive harden ink(30), as a coating layer, is formed on the aluminum thin layer, and formed by material for penetrating an electric wave. Adhesives(40) are bonded to an opposite face without forming the aluminum thin layer in order to bond the film type sheet with elements. The film type sheet is made of polyethylene. The adhesive harden ink with a colorant is formed between the film type sheet and the adhesives.
Patent KR-20070011765-A (KR)
Title: Wire/wireless voice control camera release shutter
Inventor: KIM TERRY KC
IPC: H04N5/232
Filed: 2005-07-21
Abstract: A cable/wireless voice-controlled release shutter of a camera is provided to easily take a picture of an object by converting a voice using a shutter and a halt-shutter of the camera and recording shutter and half-shutter voice signals. A cable/wireless voice-controlled release shutter of a camera includes a wireless transmitting unit(1) for generating a voice signal and a voice processing receiver(2) directly connected to the camera. The wireless transmitting unit includes a microphone(4) receiving the voice of a user and an RF transmitter(11) for transmitting the voice signal to the voice processing receiver. The voice processing receiver includes a sensor(16) for sensing pushing of a recording button(10), and a voice recorder(15) for recording shutter and half-shutter voice signals. The voice processing receiver further includes a voice converter(14) for recognizing a voice inputted through a cable microphone(5) or an RF receiver(12) and converting the voice into a recognizable signal, an MPU(Micro Processing Unit)(13) for recognizing the voice signal as a shutter or half-shutter signal, and a coupler(18) for dropping down a shutter voltage to the shutter and half-shutter signals.
Patent KR-20070013658-A (KR)
Title: The tissue paper which mixed with make up cream/lotion and oriental medical herbs based on wormwood
Inventor: KIM JONG KYU
IPC: A45D33/38
Filed: 2005-07-27
Abstract: A tissue paper mixed with make-up cream and oriental medical herbs based on wormwood is provided to increase the moisture while providing the effects of the oriental medical herbs. The crude liquid obtained by mixing high density extracts extracted from oriental medical herbs and hydrophilic make-up cream/lotion is applied on at least one surface of a tissue paper made of natural pulp or is mixed with paper material. The crude liquid has a moisturizing function and is eluted from the paper by additional supply of moisture. The extracts of the oriental medical herbs are from at least one of wormwood, Maximowiczia chinensis, Rhizoma CNIDII, nutgall, ginseng.
Patent KR-20070017658-A (KR)
IPC: G06F12/00
Filed: 2005-08-08
Abstract: 본 발명은 듀얼포트램 및 상기 듀얼포트램을 이용한 무손실 데이터 전송 방법에 관한 것이다. 상기 듀얼포트램은, 데이터가 저장되는 데이터 영역과, 제1 플래그 및 제2 플래그가 저장되는 플래그 영역을 구비한다. 만약 상기 제1 플래그와 상기 제2 플래그가 동일한 경우에는 외부의 제1 마이크로 프로세서에 의해 상기 데이터 영역에 소정의 데이터가 저장된 후 상기 제1 플래그를 변경하여 상기 제2 플래그와는 서로 다른 값으로 설정되도록 하며, 만약 상기 제1 플래그와 상기 제2 플래그가 동일하지 않는 경우에는 외부의 제2 마이크로 프로세서에 의해 상기 데이터 영역에 저장된 데이터가 판독된 후 상기 제2 플래그를 변경하여 상기 제1 플래그와 상기 제2 플래그들이 서로 동일한 값으로 설정되도록 한다.  
     본 발명에 의하여, DPRAM이나 마이크로 프로세서의 하드웨어적인 구조의 변경없이, 마이크로 프로세서의 소프트웨어의 변경만으로 DPRAM을 사용할 수 있게 된다.  
       
     DPRAM, 마이크로 프로세서
Patent KR-20070018338-A (KR)
IPC: B42C9/02
Filed: 2005-08-09
Abstract: 본 발명은 책의 제조방법에 대한 것으로, 보다 구체적으로는 완결된 본문내용이 담긴 다수의 내지 및 표지로 구성된 본책과, 상기 본문내용의 보완내용, 참고사항, 또는 기타 내용이 담긴 다수의 내지 및 표지로 구성된 별책을 별도의 표지 없이 새로운 조성의 가접접착제층만을 이용하여 가접 상태로 합본된 무표지 가접 합본책 및 상기 합본책의 제조방법에 관한 것이다.  
     본 발명의 무표지 가접 합본책 및 상기 합본책의 제조방법에 의하면, 본책과 별책을 합본시 전혀 표지를 필요로 하지 않아 별책을 포함하는 합본책의 제본공정을 현저하게 간소화시켜 생산성을 높이고, 여러권의 별책을 본책과 극히 용이하게 합본할 수 있으며, 불필요한 표지를 제거하여 용지대, 인쇄대등이 감소되어 생산원가가 절감될 뿐만 아니라 자연환경을 보호하게 되며, 별책의 표지가 보이지 않아 발생 가능한 제본사고를 미연에 방지하고, 별책과 본책이 가접되어 있으므로 별책의 분실 우려가 없어 유통과정에서 그 취급이 편리하고, 책을 산 소비자의 편리성 또한 향상된다.
Patent KR-20060050465-A (KR)
Title: Burner and method for combusting fuels
Inventor: D AGOSTINI MARK DANIEL
IPC: F23D14/32
Filed: 2005-08-16
Abstract: A burner includes separate fuel and oxidant conduits. The fuel conduit has inlet, transitional, and outlet sections, and the oxidant conduit has inlet and outlet sections. The cross sectional flow area of the fuel transitional section varies from an initial cross sectional flow area at the fuel intake to a different cross sectional flow area at the fuel outtake, and the cross sectional flow area of the fuel outlet section is substantially uniform. At least some of the oxidant inlet section is spaced around substantially all of at least a portion of at least one of the fuel inlet, transitional, and outlet sections. The cross sectional flow area of the oxidant outlet section is less than or equal to the cross sectional flow area of the oxidant inlet section and is substantially uniform, and at least some of it is spaced around substantially all of at least a portion of the fuel outlet section.
Patent KR-20070021486-A (KR)
IPC: G06F19/00
Filed: 2005-08-18
Abstract: 본 발명은 식품 등을 저온 저장하는 냉장고에 관한 것으로서, 특히 냉장고의 설치위치 주변의 오염도를 감지하여 위치별 오염정도 및/또는 오염종류를 아바타와 함께 표시해 주는 아바타 냉장고에 관한 것이다. 
     본 발명에 따른 아바타 냉장고는 냉동실 및 냉장실이 내부에 형성된 본체와, 상기 본체에 개폐 가능하게 설치되는 도어와, 상기 본체 또는 도어와 근접한 위치에 설치되어 주변 공기의 오염도를 감지하는 각종 감지센서와, 상기 감지센서와 연결되도록 설치되어 오염감지모드에서 상기 감지센서로부터 감지된 데이터를 수신하여 위치별 오염 정도 및/또는 오염 종류를 판단하는 제어수단과, 상기 제어수단과 연결되도록 상기 도어에 설치되어 오염감지모드에서 위치별 오염 정도 및/또는 오염 종류를 아바타에 대응하여 표시해 주는 표시수단을 포함하여 구성된다. 
       
     냉장고, 아바타, 감지센서, 제어수단, 표시수단, 오염 정도, 오염 종류
Patent KR-20060097533-A (KR)
Inventor: SHON DAE WON
IPC: F16L33/14
Filed: 2005-08-22
Abstract: 본 발명은 벨트식 호스밴드에 관한 것으로서, 보다 상세하게는 밴드를 조이고자 하는 위치까지 잡아당긴 후 강하게 조일 수 있을 뿐만 아니라, 밴드를 풀 때에는 볼트를 풀은 다음 볼트가 밴드에서 이탈되게 하여 탈, 장착이 용이하도록 된 벨트식 호스밴드에 관한 것이다. 
     본 발명의 벨트식 호스밴드는, 길이방향으로 일정한 간격을 두고 등간격으로 걸림부(11)가 적어도 1열 이상 형성된 밴드(10,110)와, 상기 밴드(10,110)의 일단부가 하부에 고정되고, 양측면의 측판(41)에 일단부쪽으로 경사진 장공(41a)의 하한점이 형성되며, 타단쪽으로 단에서 안쪽으로 경사져 폭이 넓게 되도록 된 걸림단부(42)가 형성된 몸체(40)와, 상기 몸체(40)의 장공(41a)에 일단이 회전가능하면서 장공(41a)의 길이방향으로 이동 가능하도록 힌지부(31,131)가 형성되고, 타단에 상기 걸림단부(42)의 하부에 걸리도록 걸림돌기부(32,132)가 형성된 고정대(30,130)와, 상기 고정대(30,130)에 회전가능하게 설치되되, 상기 걸림부(11)에 걸려서 회전하게 되면 밴드(10,110)를 나선형식으로 조이도록 된 조임수단(20,120)을 포함하는 것을 특징으로 한다. 
       
     벨트, 호스밴드, 볼트, 조임수단, 고정대
Patent KR-20070023946-A (KR)
Title: Apparatus and method for recording moving picture
Inventor: PARK HONG JOON
IPC: H04N5/225
Filed: 2005-08-25
Abstract: A moving picture recording apparatus and a method thereof are provided to improve a scheme for recording a moving picture file in a digital camera by recording one moving picture file of a user desired event so that an additional process for editing moving pictures is not required. A method for recording moving pictures in response to a recording command comprises the following steps. The moving pictures are photographed to generate one or more moving picture files(S1). Digital picture signals are generated from input pictures and are compressed in a predefined compression scheme(S2). Moving picture files included in a preset interval are selected from the one or more moving picture files(S3). The selected moving picture files are combined(S4). The combined selected moving picture files are stored(S5).
Patent KR-20070024943-A (KR)
Title: Catalyst for cathode of fuel cell, membrane-electrode assembly for fuel cell and fuel cell comprising same
Inventor: ALEXEY ALEXANDROVICHSEROV
IPC: H01M4/90
Filed: 2005-08-31
Abstract: Provided is a catalyst for a cathode of a fuel cell, which has a very small average particle diameter and shows excellent catalytic activity, and thus imparts high power generation efficiency to a fuel cell. The catalyst for a cathode of a fuel cell comprises Ru and S particles having a nano-scaled average particle diameter, and the particles are supported on a carrier. The catalyst has an average particle size of 2-3 nm. The catalyst comprises Ru and S in a molar ratio of 0.03-0.05 and has a Ru content of 5-90 wt% based on the weight of the carrier. The catalyst is obtained by: mixing a Ru compound with a S compound; adding a carrier to the mixture; refluxing the resultant mixture, followed by filtering; and heat-treating the filtered product.
Patent KR-20070025195-A (KR)
Title: Method for calculating inverse square roots
Inventor: PARK DOO JIN
IPC: G06F7/552
Filed: 2005-09-01
Abstract: An inverse square root operation method for implementing fast speed and improving accuracy is provided to implement a fast speed and improve accuracy by previously calculating/storing an initial approximation to a lookup table and selectively loading the initial approximation from the lookup table without any operation process when an input value is inputted to the lookup table. The initial approximation is previously calculated and stored to the lookup table. When the input value is inputted to the lookup table, the stored initial approximation corresponding to the input value is selected/loaded from the lookup table and is used as the input value for a multiplier of the next operation. The lookup table uses upper 10 bits of an imaginary part of the input value as input and an address, and stores/uses 12 bits of the imaginary part of the initial approximation for each address value as an output value.
Patent KR-20070025501-A (KR)
Title: Smell and pathogenic bacteria removing mask
Inventor: CHO HYUN CHUL
IPC: A62B18/02
Filed: 2005-09-02
Abstract: A mask having functions of anti-smell and anti-bacteria is provided to carry out the filtration of the fine dust, like yellow sand, when breathing, because the latter passes through a silver thread fabric, and to achieve the anti-smell and -bacteria effect as well as the ultraviolet protection and the smooth breathing. The mask having functions of anti-smell and anti-bacteria comprises: a mask body(100); an inner fabric(110), arranged in a lower face part of the mask body(100), and having a ventilation hole(112) which is formed in a central portion of the mask body(100) corresponding to users' mouth and nose; an outer fabric(120), sewn to a frontal surface of the inner fabric(110) so that a lower part of the outer fabric(120) is opened, and covering the ventilation hole(112) in the first place; and an intermediate filter fabric(130), arranged between the inner and outer fabrics(110,120), and covering the ventilation hole(112) in the second place; wherein a silver thread(114,124) with an anti-bacterial effect is woven in the inner and outer fabrics(110,120).
Patent KR-20070028877-A (KR)
Title: Blower-wheel of air-conditioner for vehicle
Inventor: LEE SUNG JE
IPC: F04D29/38
Filed: 2005-09-08
Abstract: A blower wheel of an air conditioner for a vehicle is provided to increase an air amount by exchanging wheels simply instead of modifying parts such as a blower case or a blower motor. A blower wheel of an air conditioner for a vehicle includes a plurality of blades(110) of which an installation angle(a) is 28‹ -33‹, an inlet angle(b) is 23‹ -28‹, and an outlet angle(c) is 63‹ -67‹. The blades are formed with protrusions at lower ends, wherein the protrusions are protruded downward by 5mm. The lower ends are apart from a case of a blower by a distance of 4.6mm-5.7mm.