baber/WOPTO huggingface dataset:
Patent KR-19990068506-A (KR)
Title: 니코티나마이드아데닌디뉴클레오티드로부터사이클릭아데노신디포스페이트라이보스의대량생산방법
IPC: C07D239/00
Filed: 1999-05-28
Abstract: 본 발명은 니코티나마이드 아데닌 디뉴클레오티드로부터 사이클릭 아데노신 디포스페이트 라이보스를 대량생산 방법에 관한 것으로, 니코티나마이드 아데닌 디뉴클레오티드에 아데닌 디포스페이트 리보실 사이클라제를 처리하여 니코티나마이드, 사이클릭 아데노신 디포스페이트 라이보스 및 아데노신 디포스페이트 라이보스 등 화학생성물을 얻고, 잔여 니코티나마이드 아데닌 디뉴클레오티드와 반응생성물 혼합액에 포스포디에스터라제를 가하여 반응시킨 다음 알칼라인 포스파타제를 처리한 후, 이온교환크로마토그래피를 이용하여 사이클릭 아데노신 디포스페이트 라이보스를 대량 생산하는 방법에 관한 것이다. 
     본 발명의 생산방법은 사이클릭 아데노신 디포스페이트 라이보스를 빠른 시간 안에 대량생산하는 뛰어난 효과가 있다.
Patent KR-19990073147-A (KR)
Title: 발룬카테테르의제조방법
IPC: A61M25/00
Filed: 1999-06-03
Abstract: 본 발명에서는 제조 공정 진행중에 발생하는 환경오염을 최대로 방지하고 동시에 발룬을 팽창시킬 때 발룬팽창부가 밀리면서 부풀어오르는 현상을 없앨 수 있도록 한 발룬 카테테르의 제조방법에 대해서 공개한다. 본 발명에 따른 발룬 카테테르의 제조방법은, 내부에 제 1 관(14) 및 제 2 관(12)을 포함하는 복수개의 관이 형성되고 외면의 발룬팽창부에 제 1 관에 통하는 제 1 구멍(16)이 형성된 튜브를 제공하는 제 1 단계; 상기 제 1 관의 튜브 일단에서 제 1 구멍까지에 해당하는 부분(18)에 중합성 충전제를 채워 넣고, 충전제가 채워진 쪽의 튜브 일단에 팁(20)을 부착하는 제 2 단계; 튜브의 팁이 형성된 일단에 캡(50)을 밀폐되게 씌운 후 튜브를 이형제에 디핑 및 고형화하여 발룬팽창부의 튜브 외면, 제 1 구멍 및 제 1 관에 이형제를 충전 및 코팅하는 제 3 단계; 상기 제 3 단계를 거친 튜브를 액상실리콘에 디핑하여 외면에 오버코팅층을 형성하는 제 4 단계; 및, 상기 튜브의 제 1 관을 통하여 발룬팽창부의 제 1 관, 제 1 구멍 및 외면에 충전 및 코팅된 이형제를 제거하는 제 5 단계를 포함하여 이루어진다.
Patent KR-19990068605-A (KR)
Filed: 1999-06-05
Abstract: 본 고안의 차폐판 부착형 220V 접지 콘센트는 상용전원 공급용 220V 접지 콘센트와 여러종류의 통신용 인출구를 나란히 하여 설치 사용시 문제가 되었던 220V  상용전원용 220V 접지 콘센트에 의한 전자기 유도 장애로 인근한 옆의 통신용 인출구에 미치는 통신 사용 장애를 본 고안의 차폐판 부착형 220V 접지 콘센트로 그 상용전원용 콘센트에서 발생되는 전자기 유도를 차폐 접지 시킴으로서 그 전자기파 유도장애를 해소, 하나의 OUTLET BOX와 하나의 FACE PLATE로 220V 접지 콘센트와 통신용 인출구를 일체화 설치 사용토록 고안된 차폐판 부착형 220V 접지 콘센트이다. 
     본 고안의 차폐판 부착형 220V 접지 콘센트는 건축물내 정보통신설비환경 특히 주거용 건축물내의 정보통신설비환경이 초고속의 정보화환경으로 변화되면서, 다양한 종류의 정보통신서비스에 의한 다양한 전송 케이블 매체를 지원하는 복수개 수량 이상의 통신용 인출구와 그 220V 접지 콘센트를 벽면에 각 각 따로 설치함에 따른 다단계의 절차로 시공하야야 하는 기존의 복잡한 공사의 시공 방법을 단순하게 함은 물론 그 공사비의 절감 효과를 얻을 수 있음과 아울러 단일 OUTLET BOX 및 단일 FACE PLATE 시공에 의한 미려한 실내 마감 인테리어의 상승 효과를 기함이 본 고안의 차폐판 부착형 220V 접지 콘센트에 의하여 달성된다.
Patent KR-20010001767-A (KR)
Inventor: PARK YEONG TAEK
IPC: H01L21/334
Filed: 1999-06-08
Abstract: PURPOSE: A method for fabricating a semiconductor device having different unit devices with different characteristics is provided together with a simplified process requiring no barrier layer. CONSTITUTION: A silicon substrate(1) is provided with different unit devices(A,B) divided by a field oxide layer(2) and each including a gate insulating layer(3,13), a gate electrode(4,14), a sidewall spacer(5,15), and a source/drain region(6,16). Then, oxygen or nitrogen ion is implanted while a photoresist pattern covers the first unit device(A). Therefore, an ion-implanted region is formed on the top surface of the second unit device(B). Next, a metal layer having a high melting point such as titanium or cobalt is deposited on the overall surface of the substrate(11). Thereafter, the metal layer on the first unit device(A) reacts with the silicon substrate(11) through the annealing process, so that a metal silicide layer(51) is formed on the first unit device(A). However, no silicide layer is formed on the second unit device(B) due to the ion-implanted region. The metal layer on the second unit device(B) is then removed.
Patent KR-20010002094-A (KR)
Inventor: SUN HO JEONG
IPC: H01L27/108
Filed: 1999-06-11
Abstract: PURPOSE: A method for manufacturing a capacitor of a semiconductor device is provided to prevent a direct contact between a diffusion blocking layer and a high dielectric layer, even when a misalignment between a contact hole and a storage electrode mask occurs in forming a storage node. CONSTITUTION: An interlayer dielectric(2) is formed on a semiconductor substrate(1). A contact hole exposing a semiconductor substrate through an interlayer dielectric is formed. A plug is formed in the contact hole by stacking the first conductive layer which is to be a polysilicon layer, the first diffusion blocking layer and a storage electrode. The second conductive layer is formed and patterned on the resultant structure to form the storage electrode. A dielectric layer and a plate electrode are formed on the storage electrode.
Patent KR-20010002358-A (KR)
Inventor: BAEK JEONG HUN
IPC: G09B5/06
Filed: 1999-06-14
Abstract: PURPOSE: A speed trainer is provided to keep a time interval of sound regular as well as to make the sound at a specific regular time interval continuously. CONSTITUTION: A clock of an LCD(liquid crystal display,7) is disappeared and a number is displayed on the LCD when a walking number input button(2/3) is pushed. The number is set to a proper walking number through the walking number input button. Then, sound signal button(4) is pushed. A pager outputs a sound as 1.5Khz for 0.2sec at a proper time interval through integral processing of an inner clock(12) and an operator(10). An athlete trains speed adaptation at the same speed as a desired degree by running on a speed training machine according to the sound. Thus, the athlete is adapted to speed training when the walking number for 180sec is inputted.
Patent KR-19990073242-A (KR)
Title: 빈병을이용한재활용장치
Filed: 1999-06-22
Abstract: 위장치는 빈병재활용장치로서 빈병집결회전판에서 빈병이 상부로올라오면 빈병 이송척 암에의해 물려 커팅부에서 쓰임용도에 따라 (유리잔.꽃병.전등각) 절단되어 빈병상부는 히터부에서 제2의 재생품으로 가공되어 공정이 끝이 나게 구성되어 있으며 적은 시간과 이중부담의 재생처리비용의 감소와 생활에 필요한 재생품을 만들수있어 가계와 상업적으로도 부가가치가 있는 장치 일 것이다. 
     [색인어] 
     1번  빈병집결회전판   10번  이송암            18번.19.20.21 - 프레임 
     2.4번    커 터 부     11번  빈  병            22·2·4번 - 커터기고정판 
     3번      히 터 부     12번  UP-DOWN센스       23번 - 고정볼트 
     5번  이송암고정볼트   13번 빈병 짚게 CHUCH(척) 24번 - 커터 뭉치 
     6번    이송암         14번  빈병고정 CHUCK(척) 26번 - 산업용다이아몬드 
     7번   회전부          15번    모터             27번 - 우레탄 
     8번  빈병이송 C/V     16번  에어 HOLE          28번 - 에어 HOLE 
     9번  커터척부         17번 재가공된제품출구    29번 -  단열재 
     30.31번 히터선        32번  회전경사판 
     33번 안내판           34번  회전 모터 SHAFT
Patent KR-20000011529-A (KR)
Inventor: OGAWA DETZ
IPC: G02F1/1334
Filed: 1999-07-07
Abstract: PURPOSE: A reflective liquid crystal display(LCD) device is provided to improve display quality, eg. white color purity by forming a reflection electrode having an uneven shape inside of the substrate. CONSTITUTION: The reflective LCD device comprises, a transparent substrate and an opposing substrate, a light-scattering liquid crystal lying between the transparent substrate and the opposing substrate, a reflection electrode formed on inside of the opposing substrate, and a transparent electrode formed on inside of the transparent substrate. The reflection electrode has an uneven shape, and the light-scattering liquid crystal includes both front a scattering component and a backside scattering component. The scattering plate can be formed outside of the transparent substrate, and the scattering layer can be formed inside of the transparent substrate.
Patent KR-20010009246-A (KR)
Inventor: LEE HUI YONG
IPC: F16H61/10
Filed: 1999-07-08
Abstract: PURPOSE: A torque reducibility controlling method of automatic transmission vehicle on 2 to 1 down shifting before stopping improves the controllability of the transmission of a vehicle by preventing the ascent of the rpm(revolution per minute) of an engine on 2 to 1 down shifting before stopping. CONSTITUTION: A torque reducibility controlling method comprises a first and a second steps. On the first step, if it is determined that a "D" range is shifted from a 2nd gear to a 1st gear and the size of an opened angle is smaller than a predetermined size, it is decided that the speed is shifted from a 2nd gear to a 1st gear before stopping. On the second step, if a gear shifting is started, the gear shifting control is completed by stopping the reducibility of the amount of the air of an engine after completing the gear shifting by reducing the amount of the intake air of the engine.
Patent KR-20010009361-A (KR)
Inventor: BYUN HO PYEONG
IPC: B29D35/00
Filed: 1999-07-09
Abstract: PURPOSE: Provided is a shoemaking method of safety shoe or slipper, which prevents danger of accident by static electricity and increase the productivity because static electricity generating isn't generated at the job site. CONSTITUTION: The shoemaking method is characterized by producing from a conductible polyurethane having conductivity range of E4-E10, hardness of 20-70, and density of 0.3-0.9g/cc. The conductible polyurethane is prepared from the steps of; (i) dissolving salt with organic solvent such like KOH, EC, PC and polyalkylene-glycol on increasing or reducing the amount of salt to 0.5-15%; (ii) adding it to polyol and put in oven of 20-40°C; (iii) synthesizing as constant ratio to make as each 3-5mol together isocyanate; and (iv) pouring the solution into the mold heated as 50-80°C and heating for 5-20mins.
Patent KR-20010009616-A (KR)
Inventor: LEE JONG SUK
IPC: B65D83/06
Filed: 1999-07-12
Abstract: PURPOSE: A portable color-cosmetic case is provided to open and close the cosmetic case easily by installing an auxiliary cover in an upper cover, and facilitate the choice of cosmetic by composing a container in a rotating disk type. CONSTITUTION: A portable color-cosmetic case comprises; a main body(10) of which a firth has suitable height(12); an upper cover(20) which having an auxiliary cover(22) and composed with a transparent material to be harmonized with a girth(32) of the body; and a container(30) of disk shape having suitable height of the girth to be inserted in the body, and numerous unit-containers(34) are formed in order that cosmetics are filled during being divided by color and installed in the main body(10) to be freely rotated, and several projections(36) are formed in the circumference of the girth at regular intervals.
Patent KR-20010010397-A (KR)
Inventor: SIM GEON SEOB
IPC: A23L33/00
Filed: 1999-07-20
Abstract: PURPOSE: A processed ginseng by puffing is provided, which is removed in a unique soil flavor of ginseng and increased in a crude saponin content with maintaining pharmacological elements of ginseng. CONSTITUTION: The ginseng is puffed at 120-150deg.C to improve the flavor and promote various alteration of the ginseng ingredients. The puffed ginseng is then extracted at 60-90deg.C by using water or alcohol as a solvent and the processed ginseng extract having a 18% increase of Ginsenoside Rg1 content can be used for producing health foods.
Patent KR-20010010908-A (KR)
Title: Vibration motor
Inventor: PARK JAE UN
IPC: H02K5/16
Filed: 1999-07-23
Abstract: PURPOSE: A vibration motor is provided to reduce the load applied to a shaft by differentiate the materials of inner and outer side oilless bearings which support the shaft, thereby improving the reliability of the motor. CONSTITUTION: A brush base is press-fitted into a case. A housing is press-fitted from the other end of the case. A penetrating hole is formed on the central surface of the housing. A commutator is located on a case which is adjacent to the brush base. The commutator selectively makes contact with the brush of the brush base to apply the current from the outside. A shaft is inserted into a guide hole of the housing, and one end of the shaft is located on the inner peripheral surface of the brush base. A magnet is located on the outer peripheral surface of the housing. A coil is separated from the magnet by a predetermined distance. The current is applied to the coil through the commutator. The shaft is supported by inner and outer oilless bearings. The inner and outer oilless bearings are made of different materials.
Patent KR-20000017160-A (KR)
Inventor: SAITO YUKIMASA
IPC: H01L21/316
Filed: 1999-08-06
Abstract: PURPOSE: An oxide process method and apparatus is provided to form an oxide film having a higher quality by preventing properly a natural oxide film in an ascending temperature procedure. CONSTITUTION: The oxide process method comprises the steps of: receiving a processed material within a process furnace(1) heated by a predetermined temperature; heating the process furnace to a predetermined process temperature; performing an oxide process for the processed material by providing the processed gas; and performing the heating process under the lower pressure. The oxide process apparatus comprises: a process gas providing device(8) for providing the process gas to the process furnace; an exhaust device(19) for exhausting gas of the furnace by a predetermined exhaust pressure; a vacuum exhaust device(20) for lowering the pressure the furnace than the pressure of the exhaust device; a changing device(21, 22) for changing the exhaust device and the vacuum exhaust device.
Patent KR-19990078907-A (KR)
Title: 휴대용 멀티미디어 플레이어
IPC: G06F1/16
Filed: 1999-08-19
Abstract: 본 발명에서는 오디오, 비디오, 전자수첩, 라디오, 알람기능, 통신기능, 음성녹음기능등 여러 기능이 하나의 휴대용 멀티미디어 플레이어로 통합시켜 사용자가 각 기능의 물품을 모두 가지고 다니는 불편함을 해소할 수 있도록 한 것으로, 이 플레이어는 외부와의 통신을 위한 모뎀을 구비한 휴대폰부와; 다른 컴퓨터와 연결할 수 있는 직렬포트와 병열포트부; CPU, 제어로직, 소정의 기억용량을 갖으며 통신으로 다운 받은 음악 화일과 동영상 화일을 저장하게 되는 메모리 및 소정의 제어프로그램이 저장된 시스템 롬을 구비하여 전반적인 제어 기능을 수행하게 되는 멀티미디어 제어부와; CD-ROM을 구동하기 위한 CD플레이어부와; 각 부분을 제어하기 위한 소정의 제어신호를 입력하는 입력부와; 상기 입력부로부터 제어신호를 제공받아 내부로 전달하는 입력제어부와; 상기 CD플레이어부 또는 멀티미디어 제어부에 저장된 파일로부터 MPEG-1 비디오 신호 및 MP3 오디오 신호를 처리하며 MPEG 오디오의 디지털 신호를 아날로그 신호로 변환하여 출력하게 되는 MPEG데이터 처리부와; 상기 MPEG데이터 처리부에서 입력되는 비디오 신호 및 현재 상태의 정보를 처리하여 LCD로 디스플레이 하는 화면출력부와; 그리고, 상기 MPEG데이터 처리부에서 입력되는 오디오 신호를 음성출력부에 스테레오 오디오 신호로 출력하는 오디오코덱믹서부를 포함하여 구성되는 것을 특징으로 한다.
Patent KR-20010019232-A (KR)
Inventor: LEE CHUN WOONG
IPC: B01F11/02
Filed: 1999-08-26
Abstract: PURPOSE: An apparatus for mixing water and oil using an ultrasonic vibrator is provided to restrain smoke generation, maintain the mixed state for a long time and save resources by producing fine cavities in oil and water due to vibration of an ultrasonic vibrator so that interfaces of the oil and water are emulsified, thereby preventing incomplete combustion of oil. CONSTITUTION: The apparatus comprises an ultrasonic vibrator (10) for generating ultrasonic vibration; a connecting part (20) formed at lower side of the ultrasonic vibrator (10) for transmitting the ultrasonic vibration to the vibrating part (40); an inlet part (30) on which an oil inlet line (31) for flowing oil in and a water inlet line (32) for flowing water in are formed; and a vibrating part (40) formed so that fine cavities are produced in oil and water by the ultrasonic vibration generated at the ultrasonic vibrator (10).
Patent KR-20010027446-A (KR)
Inventor: CHO WAN GU
IPC: A61K8/67
Filed: 1999-09-14
Abstract: PURPOSE: A cosmetic composition for skin-whitening containing polyethoxylated vitamin C derivatives is provided, which improves symptom of freckled skin and shows good skin-whitening effect by inhibiting melanogenesis and pigmentary deposit through high skin permeability. CONSTITUTION: The composition is manufactured into whitening cosmetics by adding polyethoxylated vitamin C derivatives(containing formula (I) and (II)) to an extradermal ointment or cosmetic products(e.g. a skin softner, a lotion, an emulsion, a nutrient cream, a massage cream, an essence, a pack). A nutrient cream for skin-whitening is comprised of 3-PEG350-ascorbic acid 15.0wt.%, stearyl alcohol 6.0wt.%, stearic acid 2.0wt.%, concentrated glycerin 1.0wt.%, squalane 9.0wt.%, 1,3-butylene glycol 6.0wt.%, polysorbate 60 1.5wt.%, polyethylene glycol 1000 4.0wt.%, hardened lanolin 4.0wt.%, octyl dodecanol 10.0wt.%, sorbitan stearate 0.8wt.% and triethanolamine 0.5wt.%, suitable amount of preservatives and fragrance, and distilled water up to 100wt.%.
Patent KR-20000028692-A (KR)
Inventor: KAWAGAMI KENICHI
IPC: H01L21/027
Filed: 1999-09-17
Abstract: PURPOSE: An electron-beam lithography method and system using thereof is provided to minimize a deviation of an exposed location by revising a beam drift in a same column of chips. CONSTITUTION: An initial location of a beam is measured and an initialization is performed (201,202). Variables(X,dx,i) are set as 0 for the initialization and a variable(N) is set as a predetermined value(n). The variable(i) is increased by 1(203). The variable(X) is revised by -dx/N. A stripe is designated(205). It is judged as to whether the variable(i) is identical to the variable(N)(206). A reference mark(beam drift) is detected and a deviation of the reference mark is measured(207). It is judged as to whether a column of chips is exposed for designating the stripe(208). A control is performed when the stripe is designated(209). The variable(X) is set as -ex when the stripe is not designated(210).
Patent KR-20010028276-A (KR)
Inventor: SON DONG GUK
IPC: A47J43/28
Filed: 1999-09-20
Abstract: PURPOSE: A rice scoop for cooking is provided to readily detach boiled rice attached to a rice scoop face and to improve hygienic safety by preventing the boiled rice from being attached to a table even if the rice scoop is put on a planar face. CONSTITUTION: A rice scoop(10) consists of a wide head portion(12) having a curved portion to readily scoop out boiled rice from a container for cooking and a handle unit(14). The entire shape of the head portion or the handle unit is formed in various shapes for use convenience. An upper face of the rice scoop is formed in a concave shape to readily put a cooked material and plural protrusions(16) are formed on the upper face. The protrusion is desirably made up on a lower face of the head portion in a hemispherical shape. The cooked material is put on the uneven face of the upper face of the rice scoop with a little gap. The remains are detached from the rice scoop as impact is given after taking away the cooked material. Thereby, the boiled rice attached to the rice scoop face is readily detached.
Patent KR-20000023464-A (KR)
Inventor: COM V CRIAN
IPC: G02B6/28
Filed: 1999-09-27
Abstract: PURPOSE: Optic fiber mach-zehnder interferometer(MZI) is manufactured by asymmetrical coupler allowing a separation of 30dB on a wider wavelength range in relation to a desired wavelength. CONSTITUTION: Asymmetric optic fiber Mach-Zehnder interferometer(MZI)(10) includes first and second optical fibers being coupled in the first coupling area(12) and the second coupling area(14). The first and second optic fibers form two interfering arms(16,18) between the first and second coupling areas. A propagation constant of the first optic fiber in the first coupling area is different from that of the second optic fiber in the first coupling area. The first and second coupling areas have the first and second fused taper couplers. Asymmetrical structure provides a separation of 30dB in a wider wavelength range. The first coupling area divides a power at a desired wavelength by 50%. Thereby, optic fiber Mach-Zehnder interferometer(MZI) is manufactured by asymmetrical coupler allowing a separation of 30dB on a wider wavelength range in relation to a desired wavelength.
Patent KR-20010037009-A (KR)
Inventor: KIM SI JOONG
IPC: H04N5/60
Filed: 1999-10-13
Abstract: PURPOSE: An apparatus and a method for processing a three-dimensional real time finger language are provided to sufficiently understand various broadcastings based on a finger language broadcasting by performing the finger language broadcasting of a sound of a television in real time. CONSTITUTION: A voice input unit(11) converts an analog voice signal into a digital voice data. A voice processing unit(12) processes the digital voice data from the voice input unit(11) by a syllable. A finger language database unit(13) stores a voice data and a finger language image data corresponding to the voice data. A finger language processing unit(14) compares the voice data of the voice processing unit(12) with the voice data of the finger language database unit(13) and reads a finger language image data corresponding to a same voice data. A synthesizing unit(15) converts the voice data of the voice processing unit(12) and the finger language image data of the finger language processing unit(14) into analog signals, and synthesizes analog signals. A display unit(16) displays a synthesized signal output from the synthesizing unit(15) on a screen.
Patent KR-20010037389-A (KR)
Inventor: BAEK SEUNG MIN
IPC: G21C17/022
Filed: 1999-10-16
Abstract: PURPOSE: An apparatus and method for testing inadequate core cooling monitoring system for nuclear reactor is provided to achieve an improved accuracy and reduce testing time and cost by inputting a simulation value to the monitoring system and comparing the test result value output from the monitoring system with the estimated value of the simulation value. CONSTITUTION: An apparatus comprises a data storing unit(360) for storing a test program and data required for test; a control unit(320) for generating a control signal for producing a simulation input value in accordance with the instruction from an examiner and the test program and data stored in the data storing unit, and a control signal for outputting data for the estimated value for the test result, test result value output from an inadequate core cooling system and the difference between the estimated value and the test result value; a simulation input unit for producing a simulation input value corresponding to the control signal output from the control unit and inputting the simulation input value to the inadequate core cooling system; and a data output unit(380) for outputting data for the estimated value for test result, actual test result value and the difference between the estimated value and the actual test result value, in accordance with the control signal output from the control unit. The simulation input unit includes an input/output simulation unit(330) and a signal converting unit(340).
Patent KR-20010037399-A (KR)
Title: Actuator driving circuit
Inventor: JUNG BYEONG SEON
IPC: F15B9/00
Filed: 1999-10-16
Abstract: PURPOSE: An actuator driving circuit is provided to increase the reliability of a circuit for driving a motor, a solenoid, and an actuator by monitoring abnormality by using a predetermined signal to be output in case of the normal operation of the actuator. CONSTITUTION: A circuit for driving an actuator includes a driving part for generating driving force by a certain operation, a control part(25) for generating an operation control signal for controlling the operation of the driving part, and a monitoring part(55) for monitoring if the control part operates normally to forcibly stop the operation of the driving part when the control part is abnormally operative, wherein the monitoring part monitors a predetermined signal generated in case of the normal operation of the control part for determining the abnormality of the control part by using a watchdog timer, so that the monitoring part carries out the error processing procedure of the control part forcibly in case of the abnormality of the control part.
Patent KR-20010038358-A (KR)
Inventor: KIM EUN HYEONG
IPC: H01L27/10
Filed: 1999-10-25
Abstract: PURPOSE: A method for etching a landing pad is to improve an etch selection rate on a lower insulating layer of the landing pad. CONSTITUTION: A landing pad(118a,118b) is connected to an active region formed between gate electrodes provided as a word line. The landing pad connected to a source region serves to reduce an aspect ratio of a buried contact hole for connecting a storage node electrode and the source region. The landing pad connected to a drain region serves to reduce an aspect ratio of a bit line contact hole for connecting a bit line and the drain region. A thermal oxide film is deposited on a substrate with the gate electrode formed, and the first photoresist pattern is formed on the substrate. A doped polysilicon film is deposited on a substrate to form a pad conductive layer, and the second photoresist pattern defining a landing pad region is formed on the pad conductive layer. The pad conductive layer is etched using the second photoresist pattern as a mask to form the landing pads.