baber/WOPTO huggingface dataset:
Patent KR-20030030774-A (KR)
Title: Method for displaying background screen of portable terminal
Inventor: JUN YEONG MIN
IPC: H04W8/24
Filed: 2001-10-12
Abstract: PURPOSE: A background image display method of a mobile terminal is provided to allow a user to select various contents with a desired position and size to his/her taste and designate a selected one as a background image of his/her mobile terminal. CONSTITUTION: A CPU of a mobile terminal stores a downloaded contents file in a memory and analyzes it sequentially(301). If the contents file describes an image module(303), the CPU decodes the image(305) and displays it as a background image on a screen(307). If the contents file describes a time module(309), the CPU calculates a current time on the basis of a system time(311) and generates a time image(313). The CPU displays the time image as a background image on the screen(315). If the contents file describes a text module(317), the CPU checks text information(319) and displays the text as a background image on the screen(321). If the contents file describes an application execution/managing module, the CPU checks icon information from an icon module and displays each execution icon as a background image on the screen(323). The CPU checks whether each application described in an application execution/management module is using a network(325). If an application is using a network, the CPU accesses the network at every pre-set period by using network connection information described in the application execution/management module(327) to download specific information(329), and indicates general information on the execution icon of the pertinent application(331).
Patent KR-20030031791-A (KR)
Title: Apparatus for suppling gas in the process of fabricating semiconductor device
Inventor: BAE DONG GWAN
IPC: H01L21/00
Filed: 2001-10-16
Abstract: PURPOSE: A gas supply apparatus for a semiconductor fabrication process is provided to minimize processing errors due to liquified alien substances by using a filter for removing the liquified alien substances from gas. CONSTITUTION: A plurality of gas cabinets(110) are used for storing the constant amount of process gas. A gas supply line(130) is used for connecting the gas cabinets(110) with a processing apparatus(120). A filter(140) is installed on the gas supply line(130) in order to filter alien substances of liquified components. A regulator(132), an air valve(134), a glass filter(140), and an MFC(Mass Flow Controller)(136) are sequentially installed on the gas supply line(130). The glass filter(140) is installed between the air valve(134) and the MFC(136). Both end portions of the glass filter(140) are connected with the gas supply line(130).
Patent KR-20030031819-A (KR)
Title: Cap assembly and rectangular- type secondary battery therewith
Inventor: YOON HUI SANG
IPC: H01M2/04
Filed: 2001-10-16
Abstract: PURPOSE: A cap assembly and a prismatic secondary battery provided with the cap assembly are provided, to reduce the inferior product by enabling a charge/discharge pin to be contact with the contact part of an insert washer having a large area. CONSTITUTION: The cap assembly comprises a cap plate(31) having an insertion hole; a hollow insulation tube(32) inserted into the insertion hole of the cap plate; a pin(33) inserted into the insulation tube; an insulation plate(34) arranged at the lower part of the cap plate; and an insert washer(41) comprising a conductive metal piece which is exposed partially and is connected with the pin electrically and an insulating plastic which surrounds the conductive metal piece. Preferably some of the conductive metal piece is exposed at the lower part of the insert washer to enable the metal piece to be weld to the head of the pin, and some of the conductive metal piece is exposed at the higher part of the insert washer to enable the metal piece to be contact with a charging/discharging pin. The area of the conductive metal piece exposed at the upper side of the insert washer is larger than the head area of the pin.
Patent KR-20030033143-A (KR)
Title: Method for fabricating planar waveguide type optical amplifier using glass sputtering
Inventor: KIM TAE HONG
IPC: G02B6/136
Filed: 2001-10-17
Abstract: PURPOSE: A method for fabricating a planar lightwave circuit type optical amplifier using glass sputtering is provided to obtain low waveguiding loss and good gain characteristics by depositing a glass containing a high density rare-earth element. CONSTITUTION: According to the method for fabricating a planar lightwave circuit type optical amplifier, a silica clad layer(401) is formed on a silicon substrate. The silica clad layer is etched in intaglio. A glass film(404) containing a rare-earth element is deposited on the intaglio-etched silica clad layer. And a top clad layer(405) is formed on the glass film containing a rare-earth element. The above silica clad layer is formed as thick as 15-20 micro meter using FHD(Flame Hydrolysis Deposition), PECVD(Plasma Enhanced Chemical Vapor Deposition) or HIPOX. And the etching of the silica clad layer is performed using an ICP(Inductively Coupling Plasma) etching method with a metal mask.
Patent KR-20020061152-A (KR)
Inventor: FUJITA KATSUHIRO
IPC: F04C29/00
Filed: 2001-10-25
Abstract: PURPOSE: To provide a scroll type compressor having a scroll member in a step shape having a step part capable of achieving improved compressing efficiency by minimizing leakage of fluid from the step part, and to reduce leakage of fluid and achieve high compressing efficiency without increasing machining accuracy of the scroll member. CONSTITUTION: This scroll type compressor has a constitution in which the step part 42 is disposed from a base point P1 determined at a high pressure space communicating timing to a position P2 after 3π (rad) toward the outer peripheral end side in the spiral direction along the inner peripheral surface of a spiral wall body 12b.
Patent KR-20030034772-A (KR)
Inventor: PARK YEON SOO
IPC: F24D3/12
Filed: 2001-10-24
Abstract: PURPOSE: A hypocaust with high heat efficiency is provided to improve heat efficiency and to be easily installed and removed. CONSTITUTION: A heat sink(1) is made of metal with high heat conductivity, and has concave grooves(3) in which a hose(5) is laid, and reinforces(2) formed thereon to prevent bending of the heat sink. Joining holes(4) are formed on the heat sink to join the heat sink with another heat sink. Joining pins(23) are formed on the heat sink to be inserted to the joining holes. Cylindrical parts(6,12) have concave grooves supporting bending parts of the hose, and joining plates(7,13) formed thereon, and are inserted to both ends of the heat sink. Pins or the joining pins are inserted to holes(8,14) on the joining plates.
Patent KR-20020034926-A (KR)
Inventor: TAMURA TOSHIKAZU
IPC: A45C7/00
Filed: 2001-10-30
Abstract: PURPOSE: Provided is a traveling bag which can be elongated without inconvenience in carrying out by using a handle capable of being pulled out and most of which is not exposed to the outside. CONSTITUTION: The traveling bag has a bag main body(1) of vertically stretchable material, a handle(6) of stretchable material provided from the inside to the outside at the rear side of the main body(1) and wheels(12) provided at the bottom of the main body(1). The handle(6) includes stretchable rods(7), a grip(8) at the top of the rods(7) and stop button(9) for holding the grip(8) at various pulled stages by pushing it. Also, the traveling bag is formed with a non-stretchable material at the upper part and a stretchable material at the lower part or be provided with a multi-staged bags connected by a zipper(4).
Patent KR-20030035663-A (KR)
Title: A device for opening the gap in segment of continuous casting process
Inventor: RYU SEUNG HYEON
IPC: B22D11/04
Filed: 2001-11-02
Abstract: PURPOSE: A device for opening a gap between segments in continuous casting facility is provided to extract cast slab promptly and safely without congestion of the cast slab between casting rolls when casting operating is stopped due to abnormality of hydraulic system in continuous casting process. CONSTITUTION: In a facility for continuously casting cast slab forcibly drawn out from a mold by continuously arranging a plural segments comprising upper and lower frames on oppositely directed corresponding surfaces of which casting rolls are installed and clamping cylinders for generating roll force to reduce a gap between the casting rolls by descending the upper frames for the fixed lower frames, the device for opening a gap between the segments in continuous casting facility comprises a cylinder housing(11) which is removably installed on the lower frame, and into which the rod front end of the clamping cylinders connected to the upper frames is penetrated; a plunger(15) vertically movably assembled into the cylinder housing(11); and a spring member(17) installed inside the cylinder housing(11) to elastically support the plunger(15) upward in order to open a gap between the casting rolls when something is wrong with the hydraulic system.
Patent KR-20030037902-A (KR)
Title: Piping structure for a concrete a water tank
Inventor: SHIN HYUN KEUN
IPC: B65D90/00
Filed: 2001-11-07
Abstract: PURPOSE: A pipe installation structure for a concrete water tank is provided to install a pipe so as to avoid the occurrence of leakage around the pipe unit equipped with a pipe and the introduction of contaminants generated from the outside of the concrete water tank. CONSTITUTION: A pipe(310) is installed so as to penetrate a wall(110) forming a concrete water tank and a polyethylene sheet(200). The pipe(310) penetrating the wall(110) of the concrete water tank is made of the same polyethylene material as the polyethylene sheet(200). The outer circumferential surface of the pipe(310) is heat fused with the polyethylene sheet(200) to thus achieve water-proofing.
Patent KR-20030039057-A (KR)
Title: Inner structure of reactor structure for nuclear power plant
Inventor: KANG YONG CHEOL
IPC: G21C13/093
Filed: 2001-11-09
Abstract: PURPOSE: An inner structure of a reactor building is provided to improve a wall safety by attaching an iron plate on an inner surface of a wall so as to form a shield surface. CONSTITUTION: An inner structure of a reactor building comprises a concrete wall(220), an iron plate frame(240), and steel-frame members. The iron plate frame(240) is stood on a fundamental part which forms an arrangement space(202) on which an equipment is disposed. The concrete wall(220) is stood with an area corresponding to an outer wall of the iron plate frame(240). The steel-frame members buried in the concrete wall is melt and attached on the iron plate frame(240). The iron plate frame(240) consists of division members, each of which comprises the steel-frame member.
Patent KR-20030047355-A (KR)
Title: A rolling control apparatus for a vehicle using electric clutch
Inventor: PARK YEONG CHAN
IPC: B60G17/015
Filed: 2001-12-10
Abstract: PURPOSE: A rolling controller of a vehicle is provided to control the rolling without affecting on the riding comfort and to realize the high durability and the light weight. CONSTITUTION: The one side of a rack(21) is connected with the one side of a lower arm(13) through a connecting pin(24) or a ball joint. An electronic clutch(22) to be operated by an ECU(Electronic Control Unit) is fixed in the one side of a body(16). A pinion(23) to be contacted to the rack is installed in a shaft(22a) of the electronic clutch. The movement of the lower arm is controlled by controlling the amount of current to the electronic clutch according to the speed value of a vehicle and the value of a steering rotation angle. Therefore, the rolling is controlled without affecting on the riding comfort and the certain operation and the high durability are obtained. Moreover, the weight of the vehicle is reduced by using the light electronic clutch.
Patent KR-20030047381-A (KR)
Title: The printed circuit board for continuity Rambus Interface Memory Module
Inventor: LEE CHAN U
IPC: H05K3/46
Filed: 2001-12-10
Abstract: PURPOSE: A printed circuit board for a C-RIMM(Rambus interface memory module) is provided to allow for common production with respect to the PCBs of other memory modules by permitting the thickness of the insulating layer to be easily controlled. CONSTITUTION: A printed circuit board comprises the first copper foil stacked plate(61) having both sides where a first circuit wiring layer(63) and a first grounding layer(65) are formed; a second copper foil stacked plate(62) having both sides where a second circuit wiring layer(64) and a second grounding layer(66) are formed; a first pre-preg layer(67) for attaching surfaces of the first copper stacked plate and the second copper foil stacked plate; and a second pre-preg layer(68) and a third pre-preg layer(69) for attaching third grounding layers(70,71) to the other surface of the first and second copper foil stacked plates, respectively. The first circuit wiring layer and the first grounding layer of the first copper foil stacked plate and the second circuit wiring layer and the second grounding layer of the second copper foil stacked plate are arranged symmetrically with each other, centering from the first pre-preg layer. The first circuit wiring layer is interposed between the first and third grounding layers. The second circuit wiring layer is interposed between the second and third grounding layers.
Patent KR-20030020224-A (KR)
Title: Ti alloy surface treatment
Inventor: ASANUMA HIROAKI
IPC: C23C8/10
Filed: 2001-12-10
Abstract: PURPOSE: To make surroundings of a material to be treated as a thin oxygen (air) atmosphere by a simple means, and form an oxygen-diffused layer on the surface so as not to form oxides. CONSTITUTION: This surface treatment method comprises burying a titanium- based material 1 in a powder 3 having oxygen absorptivity, then heating the above titanium-based material 1 together with the powder 3 in an atmospheric air or an oxygen atmosphere at a given temperature for a predetermined time to diffuse and impregnate oxygen atoms into the surface layer of the titanium- based material 1, and to form the oxygen-diffused layer consisting of Ti-0 solid solution on the surface.
Patent KR-20030053253-A (KR)
Title: Device and methods for detecting surface defect of billet
Inventor: LEE SI HUN
IPC: G01N21/89
Filed: 2001-12-22
Abstract: PURPOSE: An apparatus and a method for detecting a surface defect of a billet are provided to prevent the surface defects from being created on the billet by listing size and position information of the surface defects to feedback the list when reproducing the billet. CONSTITUTION: A surface defect detecting apparatus includes a magnetic coating section(1) for coating magnetic material on a billet, a light source section(3) for radiating ultraviolet ray onto a surface of the billet coated with magnetic material, a camera(5) for photographing the surface of the billet, a computer section(7) for processing an image obtained by the camera(5), and a display section(9) connected to the computer section(7) in order to display an image. The camera(5) includes a CCD camera and four cameras are installed to photograph each plane of the billet.
Patent KR-20030053271-A (KR)
Title: Electro-dewatering device for sludge using metal filter
Inventor: LEE JONG HYEON
IPC: C02F11/12
Filed: 2001-12-22
Abstract: PURPOSE: An electro dewatering apparatus for sludge using metal filter is provided, which can increase intensity of electric field applied to sludge so as to increase electrical conductivity inside the sludge, thus increasing electro dewatering effect at a condition of applying same DC voltage to sludge. CONSTITUTION: The apparatus comprises a conically bottomed main body(4) in which a first electrode(6), a first metal filter(12a), a second metal filter(12b), a second electrode(10) are set serially, wherein between the first metal filter(12a) and second metal filter(12b) sludge is filled to be pressed by piston(8); a piston(8) set above the second electrode(10) to press the sludge; a first and a second electrodes(6,10) for electric field formation in sludge; conductive metal filters(12a,12b) to squeeze water from sludge and to increase the intensity of electric field in sludge by keeping same electric potential as that of the first and second electrodes(6,10); a temperature sensor(18) set between the second electrode(10) and the piston(18) to detect sludge temperature and cut electric power to the electrodes(6,10) in case it exceed preset point.
Patent KR-20030053764-A (KR)
Title: A Coating Composition for Fingerprint Resistance Steel Plate Having Superior Ink Printing And Adhesive And A Preparing Method For The Steel Plate
Inventor: NOH JAE WON
IPC: C09D133/08
Filed: 2001-12-24
Abstract: PURPOSE: A resin coating composition for an anti-fingerprint steel sheet and a method for preparing a steel sheet using the composition are provided, to improve the surface tension of a steel sheet without deterioration of a processability and to enhance the ink printing property and the adhesive strength of a coating. CONSTITUTION: The resin coating composition comprises a main solution comprising a water-solubilized ethylene-acryl resin and 15-25 phr of silica; and 0.5-1 phr of an imine ester and 3-10 phr of an olefin-based wax. Preferably the olefin-based wax is an ethylene-based wax, a propylene-based wax or their mixture. The method comprises the steps of coating the composition on a chromate-treated zinc-electroplated steel sheet with a thickness of a dry coating of 0.5-1.5 micrometers, and baking it at a temperature of 100-200 deg.C.
Patent KR-20030057825-A (KR)
Title: Circuit for generating bitline precharge voltage
Inventor: CHUN GI CHANG
IPC: G11C7/12
Filed: 2001-12-29
Abstract: PURPOSE: A circuit for generating a bit line precharge voltage is provided to increase the efficiency of the self refresh by utilizing bit line precharge voltage having a low level lower than that of the normal operation during the self refresh operation. CONSTITUTION: A circuit for generating a bit line precharge voltage includes a voltage dividing circuit block(50), a precharge voltage level selection signal output block(51), a constant voltage generation block(52), a differential amplification block(53) and a precharge voltage output block(54). In the circuit, the voltage dividing circuit block(50) outputs a first level voltage(x_half) used at the normal mode operation to control the vblp level and the second and the third level of voltages(x_up,x_dn). The differential amplification block(53) amplifies with changing the levels of the output voltage in response to the first level voltage(x_half) of the normal mode and the second and the third level voltages(x_up,x_dn) used at the self refresh mode. And, the precharge voltage output block(54) outputs the bit line precharge voltage(vblp) by the output of the differential amplification block(53).
Patent KR-20030058169-A (KR)
Title: Data processing apparatus and method for branch processor
Inventor: SEO HYEON SEUNG
IPC: H04L12/40
Filed: 2001-12-29
Abstract: PURPOSE: An apparatus and a method for processing data in a BP(Branch Processor) are provided to efficiently assign a process time to all terminal by storing an FD value whenever an event is generated and processing the data according to the sequence of the stored FD values. CONSTITUTION: A LAN(Local Area Network) driver has a selector(510) for selecting an FD value provided to each terminal when generating an event, from the minimum FD value. The LAN driver has a scheduler(520) for discriminating a terminal in which the event is generated, from the FD value selected in the selector(510), storing the corresponding FD value, and performing data process with the corresponding terminal according to the stored sequence of the FD values.
Patent KR-20030058434-A (KR)
Title: Method for forming self-aligned spacer to produce source and drain in a transistor
Inventor: KIM DEOK HWAN
IPC: H01L21/334
Filed: 2001-12-31
Abstract: PURPOSE: A method of forming a self-aligned spacer for producing a source/drain in a transistor is provided to reduce largely a manufacturing cost by simplifying a spacer formation process. CONSTITUTION: A gate oxide layer is formed on a silicon substrate. A doped polysilicon layer is deposited on the silicon substrate. A gate pattern is formed on the doped polysilicon layer by using a gate mask. A surface oxidation process is performed to oxidize a sidewall of a gate and an upper end of the gate. Ions are implanted and diffused into one side of the sidewall of the gate by using an LDD(Lightly Doped Drain) implantation method. A source/drain is formed by using a heavily doped drain implantation method. A polyoxide and an oxide are etched.
Patent KR-20010083124-A (KR)
IPC: A61K31/4402
Filed: 1999-07-19
Abstract: 본 발명은 하기 화학식 I의 신규 벤조시클로헵텐에 관한 것이다.  신규 화합물은 뼈에 대한 선택적인 에스트로겐 활성을 나타내며, 특히 골다공증의 예방 및 치료를 위한 의약 제조에 적합하다. 
     <화학식 I>
Patent KR-20010072839-A (KR)
Title: 동축 공동 공진기
IPC: H01P7/04
Filed: 1999-08-26
Abstract: 본 발명은 변형된 동축 공동 공진기와 이 공진기를 사용하는 필터에 관한 것이다.  공동 공진기는 공동 벽(203,204,205)을 구비하는데, 이 벽은 그 내측에 적어도 하나의 도전성 몸체(201,301,401)를 포함하고, 이 몸체는 한 단부에서 개방-회로를 형성하고 정규의 1/4파장 공진기 보다 길이방향으로 실질적으로 짧게 된다.  도전성 몸체(201,301,401)는 한 단부(209,405)에서 공동 벽에 부착되는 주요 도전성 로드(206,405)와 주요 로드(206,405)의 자유 단부(208,406)에 실질적으로 수직하게 부착된 로드와 같은 적어도 하나의 부가 도전성 돌출수단을 포함한다.  부가 로드의 단면 직경은 주요 로드(206,405)의 단면 직경의 0.5 내지 2배이고, 바람직하게는 주요 로드의 단면 직경과 대략 동일하다.  부가 로드(207,302,402,403)를 부착시킴으로써, 도전성 몸체의 전체 길이는 실질적으로 짧게 되지 않고, 다른 쪽으로 방향이 안내 된다.
Patent KR-20010106464-A (KR)
IPC: H01M8/18
Filed: 1999-07-01
Abstract: 적어도 한 면은 적어도 부분적으로 탄소 섬유 방사 또는 탄소 섬유의 유체 침투성이며 제직 또는 제직되지 않은 전극 작용 직물로 구성되는. 유체 불침투성인 전기 전도성 격벽의 형태로 산성 전해질에서 전기화학적 산화환원 반응을 위한 탄소계 쌍극 전극판에 있어서, 상기 탄소계 쌍극 전극판은 전기 전도성 유체 불침투성 격벽을 가지고, 상기 전기 전도성인 유체 불침투성 격벽은 탄소 섬유 방사 또는 탄소 섬유의 밀접하게 제직된 직물 형태인 매트릭스 직물의 합성물이며, 상기 격벽의 구멍은 전기 전도성 탄소 함유 재료로 유압식으로 밀봉되고, 상기 매트릭스 직물의 구멍을 적어도 부분적으로 충전시킨다.  탄소 함유 전기 전도성 재료는 선구재의 열변환에 의해 원위치에 형성된 유리질 탄소이고, 상기 선구재가 매트릭스 직물에 사전에 주입되며, 또는 상기 탄소 함유 전기 전도성 재료는 탄소 및/또는 흑연 입자 및/또는 섬유가 구성된 중합 열경화성 수지이고, 또는 열가소성 수지 및 탄소 및/또는 흑연 입자 및/또는 섬유의 열적으로 환류가능한 응집체일 수 있다.  전극판의 면에 구성된 침투성 직물은 탄소 섬유의 상승 파일일 수 있다.
Patent KR-20010075540-A (KR)
IPC: F02M55/02
Filed: 2000-08-01
Abstract: 본 발명은 종방향으로 연장되는 블라인드 보어(2) 및 다수의 연결부(10 내지 13)를 포함하는 튜브형 본체(1)를 갖는, 엔진의 커먼 레일 연료 분사 시스템을 위한 고압 연료 저장기에 관한 것이다. 
     내압성을 개선하고, 고압 연료 저장기의 수명을 연장시키기 위해, 블라인드 보어(2)의 폐쇄 단부 내에 로킹 플러그(6)가 배치된다.
Patent KR-20010080882-A (KR)
IPC: C07K14/705
Filed: 1999-10-13
Abstract: 본 특허 명세서에 개시된 본 발명은 막횡단 수용체, 더욱 특별하게는 내생성 리간드가 알려지지 않은 ("고아 GPCR 수용체") 인간 G 단백질 결합형 수용체에 관한 것이며, 가장 특별하게는 구성적 활성을 부여하기 위해 돌연변이된 (비내생성) 형태의 인간 GPCR에 관한 것이다.
Patent KR-20010085970-A (KR)
IPC: G06Q30/00
Filed: 1999-10-27
Abstract: 본 발명의 목적은 상품, 제품 또는 서비스를 포함하는 판매 대상의 납입 기한(납기)을 단축하는 판매 대상의 판매 지원 시스템을 제공하는 것이다. 
     상기 목적을 달성하기 위하여 본 발명의 판매 지원 시스템은, 고객으로부터의 판매 대상에 관한 정보를 입력하는 입력 수단과, 고객에 대하여 판매 대상에 관한 정보를 표시하는 표시 수단을 구비하는 단말 시스템(51)을 구비하고, 상기 고객으로부터의 판매 대상에 관한 정보는 해당 판매 대상의 구입 주문을 포함하며, 상기 판매 지원하는 상기 단말 시스템과 통신 가능하게 접속되는 정보 관리 시스템(53)을 구비하고, 상기 판매 대상의 구입 주문을 상기 단말 시스템으로부터 수신하고, 상기 수신 판매 대상을 고객에게 제공 가능한 설비를 결정하는 정보 관리 시스템을 구비한다.
Patent KR-20010086159-A (KR)
IPC: G06F9/44
Filed: 2000-10-09
Abstract: 증가된 수행 성능에 초점맞춰지고 자바 프로그램이 함수성을 요구하는 메모리 양의 감소를 갖는 특정 하드웨어 플랫폼들 상에서 더 효과적으로 동작하기 위해 자바 프로그램들을 최적화하고 향상시키기 위한 방법은 식별하기 위해 상수들 및 특별화 함수들을 정의하고 자바 프로그램과 관련된 존재하는 클래스들을 변형하는 새로운 클래스들을 이용하기 위한 단계들을 포함한다. 이 방법은 어떠한 종류의 특별화가 일어나는지를 판정하는 평가 및 분석의 결과들을 갖는 상수들의 평가 분석에 의존한다. 옵션 단계로서, 얻어진 플랫폼 향상 자바 클래스들은 자바 프로그램들이 장래에 동작될 때 변형된 클래스들이 동일한 자바 프로그램 또는 동일한 하드웨어 플랫폼 상에서 동작하는 다른 자바 프로그램들에 의해 이용되도록 하는 원래의 자바 클래스들을 덮어쓴다.
Patent KR-20010112292-A (KR)
IPC: C30B33/08
Filed: 2000-12-25
Abstract: 본 발명은 반도체 실리콘 웨이퍼의 금속 오염방지에 도움이 되는 에칭액 및 에칭방법 및 금속오염을 대폭적으로 감소시킨 반도체 실리콘 웨이퍼를 제공한다.  본 발명에 따른 에칭액은 알칼리 수용액에 스테인레스 강을 10시간 이상 침지하여 조제되며, 본 발명에 따른 에칭방법에서는 이러한 에칭액을 사용하여 반도체 실리콘 웨이퍼가 에칭된다.  이에 따라 금속 오염을 대폭적으로 감소시킨 본 발명에 따른 반도체 실리콘 웨이퍼가 수득된다.