baber/WOPTO huggingface dataset:
Patent KR-20000061862-A (KR)
Inventor: HAN YEONG U
IPC: B65B55/00
Filed: 1999-03-31
Abstract: PURPOSE: An automatic removing water apparatus of an airtight wrapping container is provided to improve productivity and to save labor and production costs by automatically removing water through compressed air. CONSTITUTION: Water remains in a wrapping container after sterilizing, washing and cooling works are completed. The wrapping container is put on an input unit formed on one side of a lower main body(2). The wrapping container rotates at a certain speed and moves to a discharge unit along a belt(7). While the wrapping container rotates on an upper part of the belt, strong air sprayed from upper and lower nozzle tube bodies(4) is given to the upper and lower parts of the wrapping container. Thus, the water remaining on the surface of the container is automatically removed.
Patent KR-20000061940-A (KR)
Inventor: LEE CHANG JIN
IPC: C11D9/06
Filed: 1999-03-27
Abstract: PURPOSE: Provided is a detergent containing charcoal that has plenty of anion. CONSTITUTION: The detergent contains powdery charcoal so that it can increase immune system of human, has anti-aging property, and reduce stress.
Patent KR-20000062006-A (KR)
Title: Aaaaa
Inventor: LEE CHANG JIN
IPC: A21D10/00
Filed: 1999-03-30
Abstract: PURPOSE: A brean containing charcoal is provided, which can alleviate toxicity, remove odor by anion, being emitted from the charcoal, thereby useful for maintaining homeostasis of human. CONSTITUTION: To achieve the above objects, charcoal is pulverized into fine powders. After treating the fine charcoal powders to be non-toxic to human, an effective amount of powder is added in a conventional preparing process of bread.
Patent KR-20000065797-A (KR)
Title: Washer controlling method
Inventor: CHOI SEONG BONG
IPC: D06F33/00
Filed: 1999-04-09
Abstract: PURPOSE: A washer controlling method is provided to perform transmitting washing by employing a two-step drain valve and a drain motor. CONSTITUTION: A drain motor acts in a first level and a connecting link(81) is pulled to a specific distance. A second rod(92) is pulled up to the position of a first rod(91) hung to a short sill(91a). A drain valve(90) is kept closed and the connecting link(81) is pulled to a specific distance to move a brake lever(63). The brake lever(63) is distant from a drying shaft and the front end of a clutch lever is put on the original state position of a clutch spring. Thereby, a washing shaft is coupled with the drying shaft. A driving motor rotates at a high speed and the power is transferred to washing blades and a washing tub. The washing blades and tub rotates rapidly in the same direction to perform penetration washing and rinsing.
Patent KR-20000065874-A (KR)
Inventor: HWANG IK HYUN
IPC: E01C7/10
Filed: 1999-04-09
Abstract: PURPOSE: A method is provided to use waste lime as a material of cement concrete package. CONSTITUTION: 30 to 500 kg/1m¬3 of waste lime is mixed and agitated with 80 to 160 kg/1m¬3 of water. The mixture and 220 to 350 kg/1m¬3 of cement are passed through a 40mm sieve by 90 to 100 based on a passage weight percentage. Cement concrete mixture having a 0cm slump value and 150 to 300 kg/cm¬2 of compression intensity is made up by mixing 1300 to 2000 kg/1m¬3 of aggregate passing through a 5mm sieve by 0 to 30%. The cement concrete mixture is installed and pressed on a base layer. Water is sprinkled on the surface of the hardened base layer by 1.2 kg per 1m¬2 within one hour after hardening. Then, a surface layer is installed, hardened and cured on an upper part of the base layer.
Patent KR-19990046801-A (KR)
Title: 케이블의동적특성을이용한교량케이블의장력측정방법
IPC: G01L5/10
Filed: 1999-04-28
Abstract: 본 발명은, 사장교, 현수교 등 케이블을 이용한 장대 교량에 있어서, 교량 케이블의 동적 특성과 교량 케이블의 고차 고유진동수를 이용하여 케이블에 발생하는 장력을 정밀하게 측정할 수 있는 교량 케이블의 장력 측정방법에 관한 것이다. 
     본 발명에 따르면, 가속도계에 의하여 교량 케이블의 시간에 기초한 진동가속도를 측정하는 진동가속도 측정단계; 증폭기에 의하여 상기 측정된 케이블의 진동가속도 신호를 증폭하는 신호증폭단계; 상기 증폭된 진동가속도 신호를 저역 통과 필터에 의하여 소정 주파수로 차단하는 필터링단계; 상기 필터링된 신호를 아날로그/디지털 변환기에 의하여 디지털 신호로 변환하는 신호변환단계; 디지털 신호로 변환되어 있는 시간에 기초한 진동가속도 신호를 진동수에 기초한 진동가속도 신호로 변환하는 패스트 퓨리어 변환단계; 상기 패스트 퓨리어 변환단계에 의하여 변환된 진동수에 기초한 진동가속도 신호의 스펙트럼으로부터 케이블의 고유진동수를 결정하는 고유진동수 결정단계; 및 상기 고유진동수 결정단계에 의하여 결정된 고유진동수와 케이블의 유효길이에 기초하여 케이블의 장력을 결정하는 단계로 구성되는 것을 특징으로 하는 교량 케이블의 장력측정방법이 제공된다.
Patent KR-19990083635-A (KR)
IPC: H04N3/15
Filed: 1999-04-30
Abstract: 복수의 단위셀을 가지는 촬상장치에서, 각 단위셀은 1차원 또는 2차원으로 배열된 복수의 광전변환소자와 이 복수의 광전변환소자에 의해 공유된 공통회로를 구비하고, 복수의 광전변환소자는 소정의 간격으로 배열되어 있다.
Patent KR-19990064724-A (KR)
Title: 패널의 제작방법 및 그 시스템
IPC: B32B39/00
Filed: 1999-05-03
Abstract: 본 발명은 지붕판 또는 벽판등과 같은 패널의 제작방법 및 그 시스템에 관한 것으로, 하나의 시스템에서 내부에 그라스울 또는 스치로폼 또는 우레탄발포층이 내장된 패널을 제작하게 함으로써, 작업성, 생산성을 향상시키고, 공간활용을 통해 경쟁력을 높일 수 있게 하는 것이다. 
     본 발명은 언코일로 부터 공급하는 지붕판 또는 벽판의 상부판을 각 성형기에 공급하는 단계와, 공급되는 상부판의 성형을 위한 지붕판 성형기, 벽판 성형기를 선택하여 선택된 성형기로 상부판을 공급하는 단계와, 선택된 성형기에 의해 성형된 상부판을 이송로울러를 통해 우레탄 발포장치로 공급하고, 패널을 이루는 하부판을 상기 우레탄 발포장치로 공급하는 단계와, 상기 공급되는 상하부판 사이에 우레탄 분사기로 우레탄을 분사하여 발포하고 압축하는 단계와, 스치로폼을 압출, 냉각, 인출하는 단계와, 그라스울을 절단, 이송시키는 단계와, 상기 스치로폼 또는 그라스울을 선택하여 유압실린더 이송판에 의해 우레탄 발포장치 전단의 이송로울러측에 공급하는 단계로 이루어짐을 특징으로 한다.
Patent KR-20000073392-A (KR)
Inventor: KIM JIN HONG
IPC: G11B7/258
Filed: 1999-05-10
Abstract: PURPOSE: An optical recorder is provide to simplify the structure thereof, to enable recording with low laser power and to improve recording and reproduction stability when recording and reproducing information. CONSTITUTION: The optical recorder comprises: a substrate(11); a bandpass filter layer(12) formed on the substrate and transmitting only a light with a specific wavelength; a recording layer(13) formed on the bandpass filter layer and being formed of a liquid crystal of an azo group; and a reflecting(14) layer formed on the recording layer. The bandpass filter layer transmits only the laser with a recording and reproduction wavelength with which information is recorded and reproduced on the recording layer, the wavelength ranging between 400 nm and 480 nm.
Patent KR-20000074219-A (KR)
Inventor: KIM HONG GI
IPC: B29D30/48
Filed: 1999-05-19
Abstract: PURPOSE: Provided is steel tire cord comprising twisted steel wires, which is used for a reinforcement of a tire and improved a rubber adhesive property. CONSTITUTION: The surface of the steel wire comprises triple plating layers: 1-8 g (based on the steel wire of 1 Kg) of a brass plating layer; 0.1-1.0 g (based on the steel wire of 1 Kg) of a cobalt plating layer on the brass plating layer; 0.1-1.0 g (based on the steel wire of 1 Kg) of a copper plating layer on the cobalt plating layer.
Patent KR-19990068444-A (KR)
Title: 폐수슬러지탈수시스템
Filed: 1999-05-20
Abstract: 본 발명은 하수 슬러지, 산업 현장의 오폐수 슬러지가 유입되는 슬러지 투입 장치로부터 일정한 체적을 갖는 두 개의 압력 용기로 된 자동공압펌프 내에 자연압으로 슬러지를 받아 자동공압펌프의 압축 공기를 이용하여 일측에 관으로 연결된 탈수기 내로 유입시켜 여과포로 포삽된 여과판으로 슬러지를 압착시키면 슬러지는 여과판과 여과판 사이에서 케이크화되어 남고, 액체는 여과포를 통하여 저면으로 낙하된 후 배출관(드레인관)을 통하여 슬러지 침전조로 환수된다. 이 때 탈수기의 여과판은 판 분리 장치에 의하여 벌어지는 동시에 케이크가 이송 콘베어로 낙하되어 콘테이너로 이송된 후 처리장으로 운반 처리되고, 여과판을 포삽한 여과포에 잔류된 슬러지는 여과포 세척 장치의 분사 노즐에서 분사되는 물에 의하여 세척된 후 배출관을 통하여 슬러지 저장조 내로 환원되어 다시 탈수기로 다른 하수 슬러지와 함께 유입되어 압착 탈수되도록 한 구성으로서, 본 발명은 하수 및 오폐수 슬러지를 투입 장치 자동공압펌프 탈수기 여과판으로 압착 슬러지를 케이크로 성형 콘베어로 케이크 이송 여과판의 여과포에 잔류된 슬러지 세척 세척된 슬러지 환수 및 재처리의 공정으로 이루어진 슬러지 탈수 시스템에 관한 것이다.
Patent KR-19990073121-A (KR)
Title: 운반장치가구비된골프백
IPC: A63B55/60
Filed: 1999-05-21
Abstract: 본 발명은 운반장치가 구비된 골프백에 관한 것으로, 골프백의 외주연에 부착시키는 지지플레이트(100)와, 상기 골프백의 외주연에서 지지플레이트(100)에 체결하는 메인플레이트(200)와, 상기 메인플레이트(200)의 전면에 회전 가능하게 결합시킨 다리부(300)와, 상기 메인플레이트(200)의 전면에 결합되어 다리부(300)의 각도를 제어하는 메인축받이부(210)와, 상기 메인축받이부(210)의 좌우면에 대향되어 결합 또는 분리되는 제1축받이부(220)와, 상기 제1축받이부(220)를 메인축받이부(210)에 결합 또는 분리시키는 조절부(230)와, 상기 메인플레이트(200)의 전면에 결합시키는 커버(260)와, 상기 다리부(300)의 하측에 결합하여 골프백(1)을 이동시키는 바퀴부(400) 및, 상기 골프백의 외주연 상측에 결합시키는 핸들부(500)로 구성하므로 운반장치를 골프백 본체에 간단하게 결합하여 별도의 카트 없이도 간편하고 편리하게 골프백을 끌고 다닐 수 있을 뿐만 아니라 사용자의 편의에 따라 사용하지 않을 때에는 골프백으로부터 분리해 보관하거나 분리상태로 포장할 수 있으며, 골프백을 운반할 때와 지면에 세워 둘 때에 따라 골프백에 대한 운반장치의 각도를 용이하게 조절할 수 있고, 부품수가 적고 구조가 간단하여 고장의 염려가 적으며 바퀴를 분리할 수 있어 조립작업이 용이하며 운반장치의 문제가 발생되면 즉시 교체하여 사용할 수 있는 효과가 있다.
Patent KR-20010001462-A (KR)
Inventor: KIM JEOM GYU
IPC: G11C11/407
Filed: 1999-06-04
Abstract: PURPOSE: A circuit for writing a data of a semiconductor memory device using an address counter is provided to generate automatically a desirable address without inputting from the outside to write a data as using an address counter capable of increasing or reducing an address a predetermined number by a predetermined number. CONSTITUTION: A circuit for writing a data includes a portion(310) for generating a counter writing 'enable' signal, a data writing controller(300), an address oscillating portion(380), and an address counter(390). The portion for generating a counter writing 'enable' signal generates a counter writing enable signal, and first and second data selecting signals in response to a counter writing signal and a selecting signal. The data writing controller generates an input and output line writing signal to do 'enable' an input and output line pair and generates a bit line sense amp operating signal to make an operation a bit line sense amp in response to the counter writing enable signal. The address oscillating portion becomes 'enable' in response to the counter writing enable signal and generates an address oscillating signal having a predetermined frequency. The address counter increases or reduces an address counting value K(>= 1) by K in response to the address oscillating signal and makes a word line become an 'enable' K by K in response to the increased or the reduced address counting value.
Patent KR-20010009277-A (KR)
Inventor: LEE YONG SUB
IPC: E06B7/30
Filed: 1999-07-08
Abstract: PURPOSE: A door monitor is provided to observe, to watch visitors on the outside or circumstances easily at a long distance and to lower the cost of maintenance. CONSTITUTION: A door monitor (100) comprises; a condenser (10) which comprises a front inclined from the center vertically at a fixed angle, a top end illuminated to the outside, a center which condenses the incident light from the outside, a doorbell attached-lower end and a screw thread formed on the outer circumstance of a rear end; a fixed ring (30) coupled to a condenser (10) and fixed to an external surface of a door (1) with many projections (31); a body tube (40) which comprises one end screwed with a condenser (10), an end projection of a large diameter on another end, a screw thread formed throughout the outer circumstance and on the end projection; a coupling ring (33) screwed on the outside of a body tube (40) and fixed closely to a door (1) between fixed rings (30); an ocular (60) where the diffused light is gathered by connecting to the rear of a body tube (40); a fixed member (61) screwed to a body tube (40) where an end projection is formed to couple and to fasten an ocular (60) to a body tube (40); a control circuit (70) which controls the illumination of a condenser (10) and a doorbell; and a remote control (71) which regulates a control circuit (70) from distant.
Patent KR-20010017825-A (KR)
Inventor: LEE EUN JUNG
IPC: H04M11/04
Filed: 1999-08-14
Abstract: PURPOSE: An apparatus for monitoring an intruder by a wireless telephone is provided to decide whether a person intrudes in a house, depending on the strength of a wireless signal change, when a movement is sensed on a space between a base set and a handset, so as to alarm the intrusion to a house resident by using the wireless telephone while the house resident is out of the house. CONSTITUTION: A memory(10) stores an originating telephone number for intruder alarming. A dialer(20) dials an inputted telephone number. A receiving field strength measurer(30) measures the strength of a signal received from a base set. A comparator(40) compares the measured strength with a previously-measured strength. If differences between the strengths are over a predetermined degree, the comparator generates an intrusion signal 'S'. A controller(50) reads the originating telephone number from the memory(10), and transmits the originating telephone number to the dialer(20).
Patent KR-20000017321-A (KR)
Inventor: WOOSYIDAKASI
IPC: H04J11/00
Filed: 1999-08-16
Abstract: PURPOSE: Wireless communication method and wireless communication system are provided to improve the conventional communication method and communication system that causes the demodulation error because of receiving timing error which get larger according to bit length of transmitting data. CONSTITUTION: The wireless communication method and wireless communication system comprise the steps of: varying receiving signal according to information data in certain style; exchanging the varied receiving signal at plural communication terminals; controlling the plural communication terminals by controlling terminal; making the first symbolic class that is used for establishing same period about the controlling terminal and plural communication terminal; sending the first symbolic class; establishing the same period about the controlling terminal according to the standard timing; generating the second symbolic class that show the demodulation timing; sending the second symbolic class to the other communication terminal; receiving the second symbolic class according to demodulation timing; and demodulating received signal.
Patent KR-20010019149-A (KR)
Inventor: HAN SANG MU
IPC: C10B53/00
Filed: 1999-08-25
Abstract: PURPOSE: A preparation method of cokes is developed to have superior blending capability with coal and provide caking ability to non-caking coal by using wasted tire powder or granulated powder without metal component, tar. CONSTITUTION: A method for producing cokes comprises admixing 10-50 wt.% of wasted tire powder without metal component and tar sludge based on total weight percent of product. After then, the obtained mixture is heat-treated and carbonized at 250-350 deg.C for 30 minutes to 1 hour to produce carbonized product. The resulted product is cut to 3mm or less and then admixed with non-caking coal in 50-100 % by weight. After heat treatment, cokes product is obtained as a final product. The tar sludge generated during the production of cokes contains aromatic hydrocarbons with high fluidity and chemically stable solid particles.
Patent KR-20000036284-A (KR)
Inventor: O SE YANG
IPC: B44C1/26
Filed: 1999-08-27
Abstract: PURPOSE: A production method of plate for finished material of construction and its product are provided to alternate finished materials of construction such as stones, tiles and so on by producing a plate-shaped ceramic ware as the finished material of construction through an inlaying method and a production method of ceramic ware. CONSTITUTION: Raw materials are mixed at a regular ratio. The mixed raw material is kneaded by mixing water and the bubbles in a dough is removed. A plate-shaped vessel is molded by the dough. An inlaying material of different color is filled after engraving a regular pattern in one face of the molded vessel. The inlayed vessel is dried. An inlayed pattern is expressed by polishing an inlayed face of the dried vessel. A first plate is produced by first-burning the vessel expressed the inlayed pattern at 800-900°C for a certain time. The first plate is dried by glazing an enamel in one face expressed the inlayed pattern of the burned first plate. A plate is produced by secondary burning the first plate glazed the enamel at 1250-1350°C at the certain time.
Patent KR-20010026390-A (KR)
Inventor: CHOI NAK CHUN
IPC: H03F3/343
Filed: 1999-09-06
Abstract: PURPOSE: A lamp system is provided to be capable of supplying a stable reference voltage regardless of resistance process distribution and temperature and preventing a rapid variation of the reference voltage. CONSTITUTION: An internal current supplying part(412a) supplies a drive current and has the first to third current sources. A differential amplifier is driven by the drive current from the internal current supplying part and consists of transistors(Q8-Q15). The first internal current mirror(412c) consists of transistors(Q17,Q18) and resistors(R3,R4) connected to form a current mirror. The second internal current mirror(412d) consists of transistors(Q13,Q14) connected to form a current mirror. The third internal current mirror(412e) consists of transistors(Q15,Q16) connected to form a current mirror.
Patent KR-19990084005-A (KR)
Title: 발전기 전기자 권선의 반작용을 해소하는 발전기 구조장치.
Filed: 1999-09-06
Abstract: 본 발명은 발전기 전기자 권선의 반작용을 해소하는 방법에 관한 것으로, 기존 발전기의 운전시 소요되는 원동력은 발전기 전기자 권선의 반작용에 의한 토크이며, 이를 해소하기 위한 새로운 구조의 발전기 이다. 
     이를 위하여 본 발명의 발전기는 기존 발전기 전기자 철심의 구조를 변경하고 철심의 내.외측 슬롯에 전기자 권선을 연결하여 감은것으로, 발전기 운전시 주자극의 계자 자속이 철심 내.외측에 감긴 전기자 권선 사이에서 굴절되어 흘러가게 함으로서, 철심 외측 전기자 권선에 흐르는 전류의 작용에 의하여 굴절되어 흐르는  주자극의 계자 자속이 운전 방향으로 밀려가게 한 것으로, 발전기 운전시 전기자 권선의 반작용에 대항 하는 작용을 하게 하여, 전기자 철심 내측의 전기자 권선에 흐르는 전류의 반작용을 해소하는 방법의 발전기 장치이다.
Patent KR-20010027845-A (KR)
Inventor: LEE BEUNG KOOK
IPC: E05B5/00
Filed: 1999-09-16
Abstract: PURPOSE: A push-pull door opening device is provided to be useful for a patient, a loader, or a child not to turn a doorknob, and to prevent noise at restoring a door. CONSTITUTION: A fitting unit(16) is inserted to a fitting groove(13) of a door frame(12) by an elastic member, and a door(11) is closed. A protrusion(21) of a sliding unit(20) contacted to a pushed plate(27) moves the sliding unit to the left with turning the pushed plate contacted to a push rod(41) in pushing a push member(40) out of the door. The fitting unit combined with the sliding unit by an elastic member(15) is separated from the fitting groove, and the door is opened. The sliding unit returns by a restoring force of the elastic member in eliminating the pushing force of the push member. A pulling plate is pulled and turned by a pull rod(51) in pulling a pull member(50) at the inside of the door. The protrusion of the sliding unit contacted to a pulling plate moves the sliding unit to the left, and the door is opened. The sliding unit is restored with the restoring force of the elastic member by eliminating the pulling force.
Patent KR-20010028568-A (KR)
Inventor: CHO SAM GYU
IPC: B21C9/00
Filed: 1999-09-22
Abstract: PURPOSE: A production method of a high carbon steel wire rod is provided to properly control components of a high carbon steel and a cooling speed. CONSTITUTION: A billet of high carbon steel contains 0.75-0.85wt.% of C, 0.3-0.9wt.% of Mn, 0.15-0.35wt.% of Si, 0.04-0.5wt.% of V, 0.003wt.% or less of N, 0.01wt.% or less of P, 0.01wt.% or less of S, the balance of Fe, and other inevitable impurities. The billet is heated to resolve a carbide and a nitride of the V. The heated billet is cooled at a cooling speed of 0.5-5deg.C/s after a hot wire rod rolling. Thereby, a wire rod of high carbon steel having a low material deviation is produced.
Patent KR-20010029358-A (KR)
Inventor: KIM IN GAP
IPC: F25B30/00
Filed: 1999-09-30
Abstract: PURPOSE: A heat pump system for electric motor is provided to reduce parts count and achieve an improved cooling/heating performance by allowing heat exchange operation to be performed between the cooling medium employed in a driving motor cooling device and the heat exchanger medium employed in an air conditioner. CONSTITUTION: A heat pump system comprises a compressor(2); a three-way valve(3) connected to an outlet port of the compressor and which selectively switches flow channel; an outdoor side condenser(4) connected to the three-way valve; a receiver dryer(5) connected to the outdoor side condenser and which performs gas-liquid separation operation to the heat exchanger medium; a first expansion valve(61) connected to the receiver dryer; an evaporator(6) connected to the first expansion valve; a chiller(7) connected between the evaporator and the compressor; an indoor side condenser(8) connected to the three-way valve; and a second expansion valve(71) connected to the chiller. The chiller is connected to the cooling line for a driving motor(1), allowing the cooling medium and the heat exchanger medium to be heat-exchanged. A first check valve(63) is arranged between the evaporator and the chiller, and a second check valve(73) is arranged between the second expansion valve and the chiller.
Patent KR-20010035931-A (KR)
Inventor: JO SAN KU
IPC: G06F17/00
Filed: 1999-10-05
Abstract: PURPOSE: A system and a method for providing internet address additional information are provided to rapidly and accurately offer all sorts of information on a web client connected to a web server system by using an IP address as a key word. CONSTITUTION: When a web client connects to a web server(30), additional information on relevant IP address is rapidly and accurately searched. An IP address additional information providing system(1000) adds the additional information, and receives related information. The web server(30) includes a web server application program(35). The IP address additional information providing system(1000) includes an IP address additional information providing client(100), an IP address additional information providing server(200) and an information collection and update agent(300).
Patent KR-20010036576-A (KR)
Inventor: HWANG SEON HO
IPC: C08L7/00
Filed: 1999-10-09
Abstract: PURPOSE: A color conductive rubber composition is provided to present various colors and have good conductivity especially required to disperse fine static charges by eliminating addition of carbon black to the composition. CONSTITUTION: A color conductive rubber composition contains NBR singly or blended manner as a base resin to embody better electrical capability and 1-10 weight parts of perchlorate as a conductive filler, 10-40 weight parts of polar organic solvent and polyethylene glycol derivative to disperse and electrolyze the perchlorate in rubber matrix and, as inorganic filler to increase reinforcing capacity, 20-150 weight parts of silicon aluminate reinforcing agent containing about 5% of Na2O and about 5% of crystalline water, 5-40 weight parts of hard clay and 0.1-7 weight parts of silane coupling agent relative to the reinforcing agent. The color conductive rubber composition is useful in preparation of floor material.
Patent KR-20000029117-A (KR)
Inventor: MAKITA AKIRA
IPC: H01J29/07
Filed: 1999-10-16
Abstract: PURPOSE: A shadow mask of high precis ion and high minuteness and an apparatus for the shadow mask capable of etching at high precis ion and high minuteness are provided. CONSTITUTION: In a shadow mask and an apparatus for the shadow mask, the center line average illumination(Ra) of the surface of a small aperture portion is less than 0.25 micrometer as cutoff value 0.8mm. The center line average illumination(Ra) of the surface of a big aperture portion is more than 0.25 micrometer larger than the center line average illumination level(Ra) of the surface of the small aperture portion. The center line average illumination(Ra) of the surface of the big aperture portion is less than 1 micrometer. The center line average illumination(Ra) of the small aperture portion is 0.01 to 0.25 micrometer. The center line average illumination(Ra) of the big aperture portion is 0.26 to 1.0 micrometer.