baber/WOPTO huggingface dataset:
Patent KR-20000001289-A (KR)
Title: Cooking method of water cold noodle dish
Inventor: LEE JUNG SUK
IPC: A23L7/109
Filed: 1998-06-10
Abstract: PURPOSE: A cooking method of water cold noodle dish is provided to cook delicious water cold noodle dish in the same method with a regular rate of prescribed spices and condiments mixing. CONSTITUTION: A cooking method of water cold noodle dish comprises the steps of: inputting beef 2.5-3.5Kg, onion 7.5-8.5Kg, radish 2-2.5Kg, sugar 2.5-3.5Kg, meat stock powder 1.5-2.5Kg in boiled water 90l and heat for 20-30min. and cooling; after cooling, inputting a brewed vinegar in the soup to make meat stock; adding a cold vermicelli, ingredients, sugar, chemical seasoning, brewed soy sauce, brewed vinegar, onion, garlic, red pepper powder.
Patent KR-20000007166-A (KR)
Title: Beeper name card
Inventor: YOO YOUNG GIL
IPC: H04M1/26
Filed: 1998-07-01
Abstract: PURPOSE: A beeper name card is provided to call and fax at a time using a shortened dial button without putting a telephone number and a fax number in a name card one by one. CONSTITUTION: The beeper name card has; a shortened dial button(2) containing the phone number and the fax number in a name card(1); and a shortened dial device having a shortened dial button(11) that is put by one touch, a CPU(12) that controls a circuit, a memory(13) that has a company number, a DTMF tone generator(14), an amplifying unit(15) that amplifies a changed signal and a speaker(16) that generates a number signal.
Patent KR-20000008945-A (KR)
Title: Safety alarming device and control method thereof for train plat form
Inventor: LEE MYUNG KWAN
IPC: B61L29/02
Filed: 1998-07-20
Abstract: PURPOSE: An alarming device is provided to give an alarm by detecting an intruder with an intruder detecting device when a train comes into a platform or leaves out of it. CONSTITUTION: The alarming device is operated by; connecting the signal output terminals of an entrance detecting device(10) an operation detection device (20) and an intrusion detection device with the signal input terminal of a micom (40); control signal output terminal (50) of the micom (40) with the control signal input terminals of an alarm giving device (51) a warning light (52) and a voiced information device (53).
Patent KR-20000009044-A (KR)
Title: Motor
Inventor: KIM YONG GI
IPC: H02K15/00
Filed: 1998-07-21
Abstract: PURPOSE: A motor is provided, which can improve an efficiency of a radio frequency transformer and decrease the cost. CONSTITUTION: The motor comprises: a rotation axis (25) to be installed at one surface (100b) of a switching terminal housing (10) and one side (100a) of a motor case seal body (60); a switching terminal (20), an amateur core(30), and a motor commutator (40) to be fixed to the rotation axis (25); switching brushes (15a)(15b) to be installed in an inner circumference surface of the switching terminal housing (10) and attached to an outer circumference surface of the switching terminal housing (10); and motor brushes (45a)(45b) to be formed to inner circumference of the motor case seal body (60) and attached to an outer surface of the motor commutator (40). Therefore, the manufacturing cost of the radio frequency transformer can to be decreased and the frequency efficiency of the radio frequency transformer can to be increased.
Patent KR-19990014117-A (KR)
Title: 감방사선성 조성물
IPC: G03F7/00
Filed: 1998-07-23
Abstract: 본 발명은 (A1) 하기 화학식 1로 표시되는 퀴나크리돈계 안료를 함유하는 착색제, (B) 알칼리 가용성 수지, (C) 다관능성 단량체 및 (D) 광중합 개시제를 함유하는 것을 특징으로 하는 감방사선성 조성물을 제공한다. 
     
       
         
       
     
     식 중, 
     R 1 내지 R 8 은 각각 독립적으로 수소 원자, 메틸기 또는 염소 원자를 나타낸다. 
     본 발명의 감방사선성 조성물은 내열성 및 내광성이 우수하고, 동시에 주위광의 스펙트럼에 맞추어서 최적화된 분광 투과율 또는 우수한 백색 균형을 갖고 있어, 반사형 칼라 액정 표시 장치에 가장 바람직한 가법혼색 (加法混色) 및(또는) 감법혼색 (減法混色) 타입의 칼라 필터를 제공할 수 있다.
Patent KR-20000014885-A (KR)
Title: Power supply apparatus of atmosphere pressure vapor chemical apparatus
Inventor: KO KWANG-HYEON
IPC: H02M3/28
Filed: 1998-08-25
Abstract: PURPOSE: A power supply apparatus of an atmosphere pressure vapor chemical apparatus is provided to be able to always watch a voltage of each controller as well as at any time check the voltage being supplied to each controller and differently control the voltage respectively. CONSTITUTION: A power supply apparatus of an atmosphere pressure vapor chemical apparatus includes a large number of direct current power suppliers(11, 12, 13), a test point unit(31a), and a voltage display means(40). The power supply of an atmosphere pressure vapor chemical apparatus supplies a power supply to a large number of controllers which control a temperature, a gas, and a handler and so on in the atmosphere pressure vapor chemical apparatus. The large number of direct current power suppliers supplies a power supply, and is one to one connected to each controller. The test point unit is connected to a test point inside of each controller, and installed on one side of each controller. The voltage display means detects a voltage being supplied to each controller and displays.
Patent KR-20000015092-A (KR)
Title: Method for monitoring content of specific call processing block in mobile communication exchanger
Inventor: KIM WAN TAE
IPC: H04B7/26
Filed: 1998-08-27
Abstract: PURPOSE: A method for monitoring a content of a specific call processing block in a mobile communication exchanger is provided to conceive whether a call processing for subscribers is normal and inform the subscribers of the conceived information rapidly. CONSTITUTION: The method comprises the steps of confirming whether a call processing for a subscriber is normal when the subscriber presents discontent in call processing service; determining whether a presumed reason for the subscriber's discontent is MDN(Mobile directory number) problem; performing the monitoring of the problem when the presumed reason is MDN problem; obtaining an outermost processor D(identification) of a corresponding call processing block and transmitting a message ordering the monitoring to the outermost processor; registering MDN of the subscriber on a MDN table of the corresponding block; determining whether a test call is generated; when the test call is generated, collecting and analyzing an output result; deleting the MDN of the subscriber from the MDN table; when an initiating command of the MDN table is input, deleting all MDN registered on the MDN table.
Patent KR-20000019014-A (KR)
Title: Polyester resin composition and its manufacturing method
Inventor: JEONG HYUN SOO
IPC: C08L67/02
Filed: 1998-09-08
Abstract: PURPOSE: A biodegradable polyester resin composition of high molecular weight is provide which has enough melting viscosity for molding process and tearing strength for practical use. CONSTITUTION: Polyester resin composition comprises a) dicarboxylic acid(or anhydride)containing adipic acid, b) aliphatic(cyclic included) glycol containing at least one of 1,4-butanediol and ethyleneglycol as main components. In the presence of 0.1 to 30 weight % of monomer having one each or more than two of hydroxyl or amine group, after at least one or two of condensation, esterification and ester exchange reaction, condensation and polymerization is carried out to produce polyester resin composition having 30,000 to 70,000 of number average molecular weight, 160,000-600,000 of weight average molecular weight and 45 to 60°C of melting point, 0.1-50 of melting viscosity(190°C, 2,160g). By using this composition, problems such as increasing of low molecular weight polyester and gelatinization is solved, tearing strength is improved, and biodegradation by microorganism when wasted is possible for practical use solving the plastic problem.
Patent KR-20000019356-A (KR)
Title: Circuit for stabilizing screen voltage
Inventor: PARK GIL SU
IPC: H04N3/185
Filed: 1998-09-10
Abstract: PURPOSE: A screen voltage stabilizing circuit is provided to improve a brightness of a screen and a performance of a screen quality by adjusting to supply a stable screen voltage constantly. CONSTITUTION: The screen voltage stabilizing circuit comprises: a horizontal output part(100) which receives a horizontal driving signal to amplify the received signal and corrects am image distortedly displayed by a condenser serially connected to a horizontal deflection coil, wherein amplified driving current generates a saw tooth wave current, a FBT which induces a voltage of a secondary by a voltage of a primary according to a winding rate; a high pressure output part (110) which outputs a grid voltage and a voltage for a brightness limitation; and a screen voltage part (120) which maintains a voltage of a third-order side induced from the secondary of the FBT according to a PWM control signal from a microcomputer and supplies the voltage to a screen.
Patent KR-19980087748-A (KR)
Title: 전화기의 다양한 벨소리 제어방법
IPC: H04M1/26
Filed: 1998-09-15
Abstract: 본 발명은 전화기의 벨소리를 다양하게 제어하는 방법에 관한 것으로, 본 발명은, 다양한 종류의 벨소리용 음악을 미리 녹음하여 두고 이를 통신망을 통하여 제공하는 벨소리 서버를 구비하고, 전화기 내에, 상기 벨소리 서버를 호출하여 다양한 벨소리를 수신받아 선택적으로 저장하기 위한 벨소리 저장수단과, 사용자의 선택에 의해 그 벨소리 저장수단에 저장된 벨소리를 선택하여 호출시의 벨소리로서 출력하도록 등록하는 등록수단을 포함하여 구성함으로써 달성된다. 본 발명은, 통화로를 통한 벨소리 수신과정과, 외부 벨소리 입력과정과, 통화로로부터 서버에서 제공하는 음악 또는 외부 음악을 입력받아 차례로 저장하는 녹음과정과, 녹음된 벨소리중 출력용 벨소리를 선택하여 등록시키는 등록과정과, 호출에 응답하는 등록된 벨소리를 출력시키는 벨소리 출력과정을 포함하며, 상기 등록과정에서 차례로 몇개의 벨소리 음악을 등록하여 두고, 모드 선택에 의해 벨소리 출력없이 쉽게 연속등록모드에서 등록된 벨소리를 선택하도록 할 수 있으며, 또한, 연속 등록된 벨소리를 시간대별로 자동으로 변경하여 출력하도록 한다. 따라서, 사용자가 원하는 전화 벨소리를 다양하게 선택하여 이용할 수 있어서 다른 사람의 전화 호출음과 쉽게 구별시킬 수 있고, 쉽게 벨소리를 변경시킬 수도 있으며, 자동으로 변경시킬 수도 있어서 다양한 벨소리를 제공할 수 있다.
Patent KR-20000021329-A (KR)
Title: Recovery method of transition metal in stainless steel slag
Inventor: KIM YONG HWAN
IPC: C22B7/04
Filed: 1998-09-28
Abstract: PURPOSE: A recovery method of transition metal in stainless steel slag is provided which could improve the recovery rate of the transition metal such as Cr, Mn, Fe and the like and reduce the cost of steel-making process. CONSTITUTION: The recovery is performed by blowing carbon powder having particle size less than 5mm in slag when the kilowatt hour per melting-steel-ton is 280-300.
Patent KR-20000021707-A (KR)
Title: Method for controlling microwave oven
Inventor: LEE CHANG U
IPC: F24C7/08
Filed: 1998-09-30
Abstract: PURPOSE: A method for controlling a microwave oven adds and changes functions of the microwave oven quickly and conveniently for saving time and cost required for developing the microwave oven while coping with the desire of a user. CONSTITUTION: A fourth and a fifth functional keys(14,15) having new functions and a memory element(50) inputting and storing information about the functions corresponding to the functional keys are installed in a manipulating panel(10). Herein, the memory element is an EEPROM(Electrically Erasable Read Only Memory) for recording and replaying the information. Therefore, if the fourth or the fifth functional keys are selected, the microwave oven is driven according to the information programmed in the memory element corresponding to the fourth or the fifth functional keys. Therefore, a new memory element is replaced for the memory element or a new function is inputted to the memory element for adding or changing new function to the microwave oven.
Patent KR-20000026928-A (KR)
Title: Hands-free for mobile communication terminal
Inventor: CHA JAE HEON
IPC: H04B1/40
Filed: 1998-10-22
Abstract: PURPOSE: A hands-free for a mobile communication terminal is provided to perform a hands-free function of a mobile communication terminal in a car, and to transmit the function to other car going together by using a transmitter. CONSTITUTION: A hands-free mobile communication terminal connects a microphone(2) and a transmitter(1) with a switch(3). The switch(3) directly connects the microphone(2) with the transmitter(1), by connecting a terminal of the microphone(5) of a cellular phone(4) with a circuit of a speaker terminal(6) and a jack(7). The hands-free cellular phone connects the microphone(2), the microphone terminal of the cellular phone, and the transmitter(1) with the speaker terminal(6) of the cellular phone. The connected jack(7) of the switch(3) is connected to a general terminal(8) located in a lower part of the cellular phone(4). The microphone(2), the transmitter(1), and the switch(3) are built on a serrated board of the hands-free cellular phone.
Patent KR-19990045033-A (KR)
Title: 신규의 항알러지 항염증 조성물
IPC: A61P37/08
Filed: 1998-11-05
Abstract: 본 발명은, 항류코트리엔, 항히스타민, 항알러지 및 항염증 작용이 있는 니메술리드와 그 염 및 세트리진으로 된 신규 조성물을 제공한다. 상기 조성물은 비염, 기관지염, 천식, 두드러기 등과 같은 알러지 질환을 치료하는데 유용하다.
Patent KR-20000031970-A (KR)
Title: Anti hepatitis b virus composition containg corilagin
Inventor: CHUNG TAI HO
IPC: A61K31/70
Filed: 1998-11-11
Abstract: PURPOSE: A pharmaceutical composition containing collagen as an effective component is provided which has anti hepatitis B virus activity but no toxic effects. CONSTITUTION: Anti hepatitis B virus composition contains collagen and a pharmaceutically acceptable carrier. The collagen is a compound of formula (1) extracted from Phyllanthus urinaria and can be obtained by sephadex LH-20 column chromatography of the aqueous ethanol extract; thin membrane chromatography by using coloring reagent of FeCl3 and isolation of highly colored portion by 2 % of ethanol; and reverse phase chromatography of the isolated sample three or four times.
Patent KR-20000033401-A (KR)
Title: Vertical resonance surface emitting laser structure having quantum well mixture
Inventor: SHIN JAE HEON
IPC: H01S5/30
Filed: 1998-11-23
Abstract: PURPOSE: A vertical resonance surface emitting laser structure having a quantum well mixture is provided to remove carrier loss by a horizontal diffusion and, simultaneously, make the diameter of a resonator small to reduce a threshold current. CONSTITUTION: A first conductive multi-layer thin film bragg mirror layer, a quantum well/wall active layer between cladding layers(10), and a second conductive multi-layer thin film bragg mirror layer are sequentially formed on a first conductive compound semiconductor substrate in a vertical resonance surface emitting laser structure having a quantum well mixture. At least one or more the closest layer to the active layer among several layers consisting of the second conductive multi-layer thin film bragg mirror layer are formed of a locally oxidized oxide film(9) from outside to central of cylindrical mesa by a selective oxidation process to and a layer(8) not oxidized of a central part which is a current path. The active layer is opposed to the oxide film and formed of a first quantum well(7) in which the mixture is generated in large quantities and a second quantum well(6) in which the mixture is generated in small quantities, and operates as an energy wall to prevent carriers injected in a quantum wall through a direct current from being diffused in the direction of horizontal.
Patent KR-19990062635-A (KR)
Title: 반도체 장치 제조방법
IPC: H01L21/8242
Filed: 1998-11-30
Abstract: 커패시터를 가지고 있는 반도체 장치를 만드는 방법에 관한 것이다. 상기 커패시터는 고밀도 메모리의 부분과 반도체 기판내에서 형성된 캐버티(cavity)내에 배치되어 있다. 한 실시예는 먼저 캐버티내에 하부 전극을 형성한다. 그리고, 캐버티를 희생층(sacrificial layer)으로 채우면, 커패시터 전극들중 최소한 한 개의 전극을 화학 기계적으로 폴리싱(polishing)(CMP)하게 된다.  하부전극과 희생층의 부분들을 제거한 후에는, 유전체층이 형성된다. 상부전극은 유전체층 위에 형성된다. 이렇게 형성된 유전체층은 하부전극을 상부전극으로부터 분리시켜, 단락과 누설전류를 방지한다.  한 실시예에서는, 한 개의 상부전극층이 여러개의 하부 전극들을 위해 형성되어, 메모리 회로의 복잡성을 감소시킨다.
Patent KR-19990062807-A (KR)
Title: 대전방지제
IPC: D06M13/322
Filed: 1998-12-04
Abstract: 본 발명은 농색화제와 동시 사용할 때에도 우수한 안정성을 나타내고 섬유 구조물상에 우수한 대전방지 및 농색효과를 야기하는 것을 가능하게 하는 대전방지제를 제공한다. 
     즉, 필수성분으로서 다음 화학식 1 또는 화학식 2의 구조를 갖는 화합물들로 이루어진 대전방지제가 농색화제와 동시에 사용된다. 
     
       
         
       
     
     X=CH 2 , C=O, NH 
     n=1~3 
     M: H, 알칼리금속, 알칼리토금속, 암모늄, 히드록실기로 치환될 수도 있는 저급알킬암모늄
Patent KR-20000039677-A (KR)
Title: Method for recording charging data in switching system
Inventor: KIM SEONG WON
IPC: H04M15/00
Filed: 1998-12-15
Abstract: PURPOSE: A method for recording charging data in the switching system is provided to record the charging data recorded in a charging disk by dates. CONSTITUTION: A charging data recording control part receives a charging data from a charging data generation part in an access switching subsystem(202). The charging data recording control part determines whether the charging data reaches 1Kbyte(204). The charging data recording control part names the 1Kbyte data as a charging data file having a file name of today date, every time the charging data reaches 1Kbyte(206). The charging data recording control part judges whether there is an old charging data file having the file name of today date identical to the currently named file(208). The charging data recording control part opens the old charging data file if there is an old charging data file having the file name of today date identical to the currently named file(210). The charging data recording control part records from a recording point of the old charging data file opened, until the charging data recorded in the charging disk satisfies a uniform date file(212).
Patent KR-20000040109-A (KR)
Title: Method of manufacturing semiconductor device
Inventor: KIM HYEON SU
IPC: H01L21/31
Filed: 1998-12-17
Abstract: PURPOSE: A method of manufacturing a semiconductor device is to facilitate the re-oxidation of a gate after the formation of the gate using a tungsten film. CONSTITUTION: A method of manufacturing a semiconductor device comprises the steps of: laminating on a semiconductor substrate(11) a gate oxide film(13), a silicon film(14), a barrier metallic film(15), a tungsten film(16) and a mask insulating film(17) in this order; patterning the mask insulating film, the tungsten film, the barrier metallic film, the silicon film and the gate oxide film to form a gate; heat-treating the substrate thus obtained to form a nitride film on a side wall of the gate; and re-oxidizing the substrate to form an oxidation film(18) on the side wall of the gate and on an exposed surface of the substrate.
Patent KR-20000046998-A (KR)
Title: Gap measurer of laser processor
Inventor: GU JA GEUN
IPC: B23K26/046
Filed: 1998-12-31
Abstract: PURPOSE: A gap measurer of a non-conductive processed material is provided to measure the processed material gap and to save a replacement time by giving to a power stoppage capacity type sensor in any case that the processed material is conductive or non-conductive. CONSTITUTION: On measuring a gap between a non-conductive processed material(W3) and a processing nozzle(33), a slide bar(42) is put into a spring(46) and is inserted in a fixing ring(40). A touch plate(44) is stuck to the surface of the non-conductive material by the repulsive force of the spring(46). On the other hand, the slide bar is firstly combined in the fixing ring and is fixed with the touch plate by interposing the spring in a lower end. In this state, the capacity of stoppage between the processing nozzle and the touch plate is detected by the stoppage capacity sensor(30). Thus, since the detected stoppage capacity is in proportion to a gap(G3) formed between the processing nozzle and the non-conductive processed material, the gap is easily output.
Patent KR-20000047181-A (KR)
Title: Cdma synchronous detector in burst mode cdma system
Inventor: KIM WON YONG
IPC: H04L7/00
Filed: 1998-12-31
Abstract: PURPOSE: A CDMA synchronous detector in a burst mode CDMA system is provided to easily detect CDMA code synchronization in a burst mode CDMA system and to simplify hardware constitution of the burst mode CDMA system. CONSTITUTION: A CDMA synchronous detector in a burst mode CDMA system comprises: a shift resister (SR) shifts input code data with a bit unit; a complementer (50) outputs a complement value of 2 from input data from the shift resister; a CDMA code generator (51) generates pre-allocated CDMA code data; a multiplexer (52) selectively outputs input data from the shift resister and input data from the complementer based on code data applied from the CDMA code generator; a synthesizer (10) outputs a specific level value after calculating data applied from the multiplexer; and a synchronous detector (20) detects a CDMA synchronous signal on the basis of the level value applied from the synthesizer.
Patent KR-20000047189-A (KR)
Title: Device for backup of electric power in computer system
Inventor: KIM CHAN
IPC: G06F1/26
Filed: 1998-12-31
Abstract: PURPOSE: A device for backup of electric power provides a computer system for maintaining a condition of a normal action for a while when an AC electric power into the computer system is blocked due to the power failure. The charged electric pressure of a battery is changed into the backup electric power through the device. CONSTITUTION: A device for backup of electric power provides a computer system for maintaining a condition of a normal action for a while when an AC electric power into the computer system is blocked due to the power failure. The charged electric pressure of a battery is changed into the backup electric power through the device.
Patent KR-19990063625-A (KR)
Title: 초점이 같은 포물선형의 횡단면을 갖는 고효율 프리즘 광가이드
IPC: G02B6/032
Filed: 1996-10-10
Abstract: 본 발명은 초점이 동일하며 서로 마주보는 평행한 제 1부와 제 2부를 구비하면서 포물선형 횡단형상을 갖는 중공 광 가이드에 관한 것으로서, 이 광가이드는 프리즘 광 가이드나, 금속 미러 광 가이드 또는 다중층 절연 광가이드같은 다른 중공의 광가이드가 될 수도 있으며, 그 횡단형상은 그 형상의 초점길이의 3배(바람직하기로 약 2.5배)를 초과하지 않는 거리로 분리된 정점들을 갖게 된다.
Patent KR-19990063983-A (KR)
IPC: A61K31/235
Filed: 1996-10-17
Abstract: Particles of water insoluble biologically active compounds, particularly water-insoluble drugs, with an average size of 100 nm to about 300 nm, are prepared by dissolving the compound in a solution then spraying the solution into compressed gaz, liquid or supercritical fluid in the presence of appropriate surface modifiers.
Patent KR-19990076702-A (KR)
Title: 기판고정용 입술형태의 밀봉부를 구비한 정전클램프
IPC: B25J15/06
Filed: 1996-12-18
Abstract: 진공처리챔버내에 기판들을 지지하기 위하여 입술형상의 밀봉부를 구비한 정전 클램핑장치가 개시된다.  정전클램핑장치는 정전클램프, 상기 정전클램프를 둘러싼 밀봉부재, 및 상기 밀봉부재를 둘러싸고 상기 정전클램프에 대해 상기 밀봉부재를 제위치에 지지하는 단부링을 포함한다.  상기 밀봉부재는 상기 정전클램프와 상기 기판 사이를 밀봉한다.  이렇게 밀봉시킴으로써, 온도제어기체가 처리챔버내로 누출되지 않도록 하고 처리기체가 정전클램프에 도달하지 않도록 하고, 및/또는 챔버내에 아크가 발생하지 않도록 한다.  더욱이, 탄성밀봉부재의 밀봉면과 정전클램프의 단부 사이에 소형 갭을 둠으로써, 헬륨공급채널이 정전클램프 상면의 외부에 형성되어, 상기 기판과 상기 클램프의 사이에 가용 접촉면적을 최대로 한다.
Patent KR-20000050600-A (KR)
Title: Adjustable supporting table
Inventor: LIN JOE
IPC: A47B9/16
Filed: 1999-01-12
Abstract: PURPOSE: An adjustable supporting table is provided, which controls the angle of a supporting table easily and conveniently through an electrical machine and is manufactured simply and effectively with low expenses. CONSTITUTION: An adjustable supporting table comprises; a foundation frame (10) which includes a main transverse moving rod (11); a primary movable supporter (20); a primary pulley assembly which is composed of plural primary foundation frame pulleys (31), plural primary pulleys (32), a primary cable (33) and is placed to be rotated on a main transverse moving rod (11) of a foundation frame (10); a primary driving gear (40) which is placed on a foundation frame (10) to extend or rewind a primary cable (33). Therefore when a primary driving gear (40) is operated, a primary cable (33) can be extended or rewound to place a primary movable supporter (20) freely.
Patent KR-20000050890-A (KR)
Inventor: KIM MOON HAN
IPC: C04B33/04
Filed: 1999-01-15
Abstract: PURPOSE: An activated kaolin powdery material capable of producing a mortar and a concrete having excellent physical properties and preparing method thereof are provided which improve compressive strength, bending strength and watertightness when it is mixed with cement. CONSTITUTION: Kaolin abundantly buried in Korea is used as raw material for activated kaolin powdery material and the temperature of the raw material kaolin is increased to 480°C within the shortest possible time to heat the raw material kaolin. The kaolin heated to 480°C by the temperature increase is baked at 800 to 950°C for more than 15 mins and the kaolin baked at the high temperature is quenched to normal temperatures with water or air. The quenched kaolin is then finely pulverized to produce the activated kaolin powdery material having a particle diameter less than 2 micrometer and a specific gravity of 1.5 to 3.0, which is used to provide 5-15% by weight of replacement addition ratio of the cement used to produce a mortar or a concrete.