baber/WOPTO huggingface dataset:
Patent KR-20020046878-A (KR)
Title: a clutch device which working with little power
Inventor: PARK JUN SANG
IPC: B60K23/02
Filed: 2000-12-27
Abstract: PURPOSE: A vehicle clutch pedal device to be driven by a slight force is provided to reduce the influence on the joints of a driver for reducing the fatigue of the driver by operating the clutch pedal with a slight force in a simple structure. CONSTITUTION: A vehicle clutch pedal device to be driven by a slight force includes a surface formed with a first fixing point(20) and a second fixing point(21) at a predetermined distance from the first fixing point, and a T-shaped link plate(10) having first to third connection parts(11-13), wherein the first connection part is connected to a side surface of the clutch pedal via a connection element, the second connection part is connected to the second fixing point by a spring tension element(30), and the third connection parts is fixed to a third fixing point(22) of a fixed rod(40) protruded from and fixed to a vehicle body.
Patent KR-20020058656-A (KR)
Title: Apparatus for driving of invertor lamp
Inventor: LEE SANG YONG
IPC: H05B41/28
Filed: 2000-12-30
Abstract: PURPOSE: A driving device of an inverter lamp is provided to improve double LC resonance efficiency by configuring a single stage circuit with one switch. CONSTITUTION: A driving device of an inverter lamp comprises a first capacitor, a switch, and a second capacitor. The driving device includes a trans for inducing an input voltage of a primary side to a secondary side, and a cold cathode fluorescent lamp driven by an output voltage of the trans. The capacitor is charged by energy stored in the primary side wiring of the trans and realizes an LC resonance circuit with the primary wiring of the trans by using stored charges. The switch is connected between the primary side wiring and a ground terminal of the trans. In case of on-state, the switch allows the primary side wiring to charge the energy. In case of off-state, the switch emits the charges stored at the capacitor. The second capacitor is connected to a secondary side wiring in parallel, and realizes an LC resonance circuit with the secondary side wiring.
Patent KR-20010024027-A (KR)
IPC: C07D501/12
Filed: 1998-09-18
Abstract: 본 발명은 용액내 β-락탐 항생제 및 D-페닐 글리신(FG)을 함유하는 혼합물로부터 β-락탐 항생제를 회수하는 방법에 관한 것으로, -5 내지 20℃ 사이의 온도에서, FG가 용액내에 잔류하는 농도에서 혼합물의 pH가 3 내지 8 사이가 되도록 하고, 수득된 고체 β-락탐 항생제를 회수하고, 잔류 액체의 온도를 10 내지 60℃ 사이로 올리고, 고체 FG를 형성하고, FG를 고체로 분리하여 석출시키고, 모액을 재순환시키고, 바람직하게, 상응하는 β-락탐 핵, 특히 6-아미노페니실란산, 7-아미노데스아세톡시세팔로스포란산 및 7-아미노-3-클로로-세프-3-엠-4-카르복실산이 D-페닐 글리신 유도체로 아실화되는 효소 아실화반응으로부터 비롯되는 β-락탐 항생제 및 FG를 실질적으로 함유하는 초기 혼합물을 사용하는 것을 특징으로 한다.
Patent KR-20010033658-A (KR)
IPC: H01R13/24
Filed: 1999-10-15
Abstract: 본 발명은 와이어(13)가 소정 피치로 입체적으로 정렬된 와이어 구조체를 제조하기 위한 와이어 입체 정렬 방법 및 장치(10)에 관한 것이다.  회전축(11)의 원주 방향으로 소정 두께를 갖는 하나 이상의 액자형 프레임체(12)를 배치한 후, 회전축(11)을 회전시킴으로써, 와이어(13)가 회전축(11)과 액자형 프레임체(12)를 둘러싸도록 와이어(13)를 액자형 프레임체(12)의 둘레에 소정 피치로 권취한 다음, 상기 액자형 프레임체(12) 상에 새로운 액자형 프레임체(12)를 적층하고 그 위에 다시 와이어(13)를 소정 피치로 권취하는 조작을 반복하여 수행한다.  이렇게 해서, 와이어가 소정 피치로 입체적으로 정확하게 정렬된 와이어 구조체를 제조할 수 있다.
Patent KR-20010034372-A (KR)
Title: 에스오아이 기판 및 그 제조방법
IPC: H01L21/762
Filed: 1999-02-02
Abstract: SOI기판상에 형성된 LSI의 비율을 향상시켜 양호한 전기특성을 실현하는 고품질 SOI기판과 그의 제조방법을 제공한다. 
     실리콘 단결정 기판상에 매설 산화층이 형성되고, 전기 매설 산화층상에 디바이스 형성용 SOI층이 형성된 SOI기판에 있어서, 상기 SOI층에 있는 핏트상 결함의 밀도가 5 cm -2 또는 상기 매설 산화층의 핀 홀 결함의 밀도가 1 개/㎠ 미만인 것을 특징이라고 한다.
Patent KR-20010052232-A (KR)
Title: 전압 신호를 시간 다중화하는 회로 및 방법
IPC: G09G3/22
Filed: 1998-12-07
Abstract: 평판 표시 장치(200)의 색 밸런스를 제어하기 위해 전압 신호를 시간 다중화하는 회로. FED 스크린 내에서, 행(230)과 열(250)의 매트릭스를 제공하고 방출기를 각 행렬의 교차점(100)에 위치시킨다. 행들은 행 드라이버(220)에 의해 "행 온타임 윈도우"동안 순차 기동되고 대응하는 각 계조 정보(전압)가 열 드라이버(240)에 의해 열을 통해 구동된다. 각 열 드라이버 내에, 본 발명은 상기 행 온타임 윈도우의 제 1 파트동안 제 1 전압 신호 및 상기 행 온타임 윈도우의 제 2 파트동안 제 2 전압 신호를 구동하는 선택 회로를 제공한다. 주어진 색에 대해, 색에 따른 색 밸런스를 조정하여 상기 행 온타임 윈도우의 제 1 및 제 2 파트의 길이를 조정할 수 있다.
Patent KR-20010042701-A (KR)
Title: 계류나사의 제조방법
IPC: B21D53/00
Filed: 1999-04-08
Abstract: 계류나사(10)를 위한 노브(30)와 페룰(50)의 제조방법이 개시되며, 노브(30)는 나사(10)에 완전하게 부착되고, 페룰(50)은 패널(60)에 부착가능하다.  노브(30)의 제조방법은 노브(30)를 위한 알루미늄 합금 모재를 제공하는 단계, 적어도 하나의 프레스 작업을 사용하여 냉간-성형에 의해 모재를 대체로 원통형인 컵형상 제품(32)으로 만들고, 컵은 대체로 원통형인 측면벽을 가지게 프레스하는 단계, 컵형상 제품(32)의 원주 밖에 놓인 모재를 제거하는 단계 및 컵(32)의 중공 원통형 벽(33)과 동일축인 컵(32)의 바닥에 구멍을 내는 단계를 포함하고 이에 따라 노브(30)를 성형한다.
Patent KR-20010034815-A (KR)
Title: 경화가능한 성형재 및 성형품의 제조법
IPC: C08G61/08
Filed: 1999-04-23
Abstract: 본 발명에서는 복분해 중합 촉매의 존재 하에서 복분해 중합 가능한 시클로올레핀류를 반응시켜 반경화 상태의 성형재를 제조하고 반경화 상태를 유지시키면서 상기 성형재를 성형용 주형에 도입하고, 경화시켜 소정 형상의 성형품을 제조한다.  본 발명에 의하면, 복분해 중합 가능한 시클로올레핀류를 원료로 하여 대기 (특별한 처치를 하지 않은 통상의 공기) 분위기 하에 용이하게 성형품을 제조할 수 있다.  또한 기존의 각종 성형기를 이용할 수 있다.
Patent KR-20010071317-A (KR)
Title: 고체 산화물 연료 전지용 철 알루미나이드 합금 콘테이너
IPC: C22C38/18
Filed: 1999-05-26
Abstract: 연료 전지용 콘테이너가 철 알루미나이드 합금으로부터 만들어진다. 콘테이너 합금은 바람직하게는 약 13-22 중량%의 Al, 약 2-8 중량%의 Cr, 약 0.1-4 중량%의 Zr 및 Hf로부터 선택되는 M, 0.005-0.5 중량%의 B 또는 약 0.001-1 중량%의 C, 그리고 나머지 F 및 부수적인 불순물을 포함한다. 철 알루미나이드 콘테이너 합금은 승온에서 이중의 환원 및 산화 분위기에 노출되는 경우, 부식 및 금속 손실에 대한 극도의 내성을 가진다. 합금은 특히 현재 사용되고 있는 스테인레스 스틸 합금을 대신하여, 고체 산화물 연료 전지용 격납 용기로서 유용하다.
Patent KR-20010052730-A (KR)
Title: 투습성이 강화된 구조물용 저점도 열가소성 조성물 및이들의 흡수 제품에서의 용도
IPC: A61F13/53
Filed: 1999-06-01
Abstract: 본 발명은 기재 상에 조성물을 코팅함으로써 불투액성 투습성인 층을 제조하기 위한 열가소성 조성물에 관한 것이다.   이 열가소성 조성물은 바람직한 열가소성 중합체 및 열가소성 조성물로부터 제조된 필름 또는 층의 투습성 또한 강화시키는 적절한 친수성 가소화제를 함유한다.    본 발명의 열가소성 조성물로부터 제조된 층은 투습성이 바람직한 다양한 용도, 예컨대 흡수 제품 예를 들어, 기저귀, 생리용 냅킨, 팬티라이너 및 요실금 제품, 및 또한 보호성 침구 커버, 보호성 의류 등에서 다양하게 사용될 수 있다.
Patent KR-20010053307-A (KR)
Title: 열가소성 중합체로 제조된 직물과 유사한 부직포 웹
IPC: D04H1/42
Filed: 1999-06-29
Abstract: 압출된 섬유 및 그 섬유로 제조된 부직포 웹은 개선된 직물 유사 성질 및 개선된 심미적 외관을 갖는 것으로 개시된다.  웹을 형성하기 위해 사용된 섬유는 티타늄 디옥사이드 및 카올린 또는 칼슘 카보네이트와 같은 1개 이상의 미네랄 충전재를 함유하는 열가소성 중합체로 제조된다.  특히, 충전재는 충전재가 중합체 재료 내에 싸이게 되는 양으로 첨가된다.
Patent KR-20020060491-A (KR)
Title: Method of fabricating a semiconductor device having contact pad
Inventor: JI GYEONG GU
IPC: H01L23/485
Filed: 2001-01-11
Abstract: PURPOSE: A method for manufacturing a semiconductor device having a contact pad is provided to prevent the formation of a void in a conductive film filling a self-align contact hole and formation of a recess region on a surface of the contact pad formed in the self-align contact hole. CONSTITUTION: A plurality of insulated wiring patterns(60) is formed on a semiconductor substrate(51) and a lower interlayer insulation film(67) covering the wiring patterns and the substrate. After forming a hard mask(69) on the lower interlayer insulation film, the self-align contact hole exposing the substrate between the wiring patterns is formed by etching the lower interlayer insulation film. The sidewall of the lower interlayer insulation film is isotropically etched and the first conductive film is conformably formed on the results. The sidewall profile of the first conductive film is converted into the sidewall profile having a positive slope by anisotropic-etching the first conductive film. The second conductive film fully filling the self-align contact hole is formed on the results.
Patent KR-20020062048-A (KR)
Title: A Plasma Display Panel
Inventor: KIM HYEON CHEOL
IPC: H01J11/24
Filed: 2001-01-19
Abstract: PURPOSE: A plasma display panel is provided to improve discharge efficiency by reducing electric field part of low efficiency and increasing electric field part of high efficiency with improved structure of sustain electrodes. CONSTITUTION: A plasma display panel is designed to have sustain electrodes having large widths of 500μm rather than conventional 390μm. Differing voltages are applied to the sustain electrodes in sustain electrode width direction. In order to apply the differing voltages, a resistor of a transparent ITO electrode is increased 2000-4000 times a conventional resistor and a voltage difference between two ends of the resistor is generated by a discharge current. Alternatively, the resistor of the ITO electrode is increased so as to neglect power consumption in the ITO electrode, bus electrodes are formed at both ends of each sustain electrode, and a voltage V is applied to one of the bus electrodes and another voltage V' is applied to the other of the bus electrodes. Alternatively, nonconductive layers are inserted to separate the sustain electrodes in the sustain electrode width direction, and differing voltages V, V', V" are applied to the separated sustain electrodes, respectively.
Patent KR-20020063410-A (KR)
Title: Printed circuit board with ground pattern area in digital telephone
Inventor: AHN HO GEUN
IPC: H05K1/16
Filed: 2001-01-29
Abstract: PURPOSE: A printed circuit board including a ground pattern region in a digital telephone is provided to prevent external noise by forming a ground pattern region on a specific region of a printed circuit board. CONSTITUTION: A printed circuit board(20) is formed by a low-priced material such as RF-1. A specific pattern is formed on a specific region of the printed circuit board(20) in order to prevent external noise. The specific pattern is formed by a specific material. The specific pattern region of the specific material is added between a modular jack(26) and a filter element(22). A pattern between the line input portion(24) and the filter element(22) is separated from a peripheral circuit interval. A ground pattern region(30) is formed on a region including the filter element(22) and the line input portion(24).
Patent KR-20010078196-A (KR)
Title: UV cure process and tool for low k film formation
Inventor: AZRAK MARIJEAN E
IPC: H01L21/316
Filed: 2001-01-31
Abstract: PURPOSE: An ultraviolet(UV) curing process and a tool for forming a film is provided to have a low dielectric constant. CONSTITUTION: A carbon-doped silicon film is deposited upon a semiconductor wafer. The silicon film is cure by irradiating the film with light energy such as UV energy, etc. For example, at least 30% of the light energy has a frequency higher than that of visible light. The cluster tool contains the first chamber coupled with an organosilane source, the second chamber which is constituted to project the light energy upon the wafer received in the second chamber, and a robot part which is suitable for controlling the movement of the waver between the first and second chambers.
Patent KR-20020066740-A (KR)
Title: Torque ripple reduction method for srm
Inventor: KIM SANG YEONG
IPC: H02P25/098
Filed: 2001-02-13
Abstract: PURPOSE: A torque ripple reduction method for switched reluctance motor is provided to reduce torque ripple by optimizing the width of rotor position detection signal sensed through a single sensor. CONSTITUTION: A torque ripple reduction method comprises a first step of detecting position of a rotor and setting the width for the position detection signal; a second step of driving phases in synchronization with the rising and trailing edges of the position detection signal; and a third step of varying the duty ratio of pulse width modulation signal from the point where the trailing edge of the position detection signal is detected, and outputting the result. The second step includes the sub steps of turning on a switching element for driving phases upon detection of rising edge of the position detection signal, and turning off the switching element upon detection of trailing edge of the subsequent position detection signal.
Patent KR-20020068899-A (KR)
Title: Method for fabricating a silicide using silicide block layer
Inventor: KIM HYEON CHEOL
IPC: H01L21/24
Filed: 2001-02-23
Abstract: PURPOSE: A method for forming a silicide using a silicide blocking layer is provided to reduce a fabrication process by simplifying a process for forming the silicide blocking layer. CONSTITUTION: A gate layer is formed on a substrate(101). A gate electrode(105) is formed by patterning the gate layer. An insulating layer is formed on the gate electrode(105). A spacer(107) is formed on a sidewall of the gate electrode(105) by etching the insulating layer. A gate pattern is formed by etching the gate layer. A photoresist is deposited thereon by using a blanket method. A mask pattern is formed by patterning the photoresist. A silicide blocking layer(109) is formed by annealing the mask pattern. A metal is deposited on a whole surface of the substrate(101). A silicide(113) is formed by annealing the metal.
Patent KR-20020072659-A (KR)
Title: Method of fabricating a microlens
Inventor: HAN CHEOL HUI
IPC: G02B3/00
Filed: 2001-03-12
Abstract: PURPOSE: A method for fabricating a micro lens is provided, which has a cross section in a shape of a hyperhemisphere. CONSTITUTION: According to the method, a sacrificial layer(20a) is formed on a silicon or glass substrate(10), and an epilayer pattern whose cross section is deformed into a sphere shape by a surface tension according to the heating is formed on the above sacrificial layer. And the sacrificial layer is laterally etched using the epilayer pattern. And the epilayer pattern is reflowed by heating the epilayer pattern. And at least a part of the cross section of the micro lens is in a hyperhemisphere shape.
Patent KR-20010090502-A (KR)
Title: High Functionality Polyisocyanates
Inventor: BRUCHMANN BERND
IPC: C09J175/04
Filed: 2001-03-17
Abstract: PURPOSE: Provided is a polyisocyanate which is built up in a defined way and can, owing to its defined structure, combines advantageous properties such as high functionality, high reactivity, low viscosity and good solubility. CONSTITUTION: The polyisocyanate is prepared by the steps of (i) preparation of an addition product(A) which contains one group which is reactive toward isocyanate and at least two isocyanate groups by reacting (a) a diisocyanate or polyisocyanate I with (b1) compounds having at least three groups which reacts with isocyanate or (b2) compounds containing two groups which reacts with isocyanate or mixtures of (b1) and (b2)(where at least one of the components (a) or (b) has functional groups having differing reactivities to the functional groups of the other component and the reaction ratio is selected so that the addition product(A) contains an average of one group which reacts with isocyanate); (ii) if desired, intermolecular addition reaction of the addition product(A) to form a polyaddition product(P) containing an average of one group which reacts with isocyanate and an average of more than two isocyanate groups; and (iii) reaction of the addition product(A) and/or the polyaddition product(P) with a diisocyanate or polyisocyanate II.
Patent KR-20020074531-A (KR)
Title: In the process of hole making on the substrate dietach method and its device for removing attached pin from back board after hobre making
Inventor: KIM BEOM GWI
IPC: H05K3/40
Filed: 2001-03-20
Abstract: PURPOSE: A method and apparatus is provided to reduce cost and improve production efficiency by automatically separating a pin through the use of a compression device installed to a cylinder. CONSTITUTION: A method for separating a pin from a back board, comprises a first step of mounting a back board where a reference pin is coupled, onto a table(3); a second step of pushing the back board; a third step of permitting the reference pin which is coupled to the back board plate, to operate a switch(6); a fourth step of allowing a cylinder(8) to operate by the operation of the switch; a fifth step of allowing a compression device(9) installed to the cylinder, to compress the reference pin; and a sixth step of separating the reference pin and permitting the cylinder to return to its original state. The table is installed onto a support(2), and has a V-shaped guide groove(5) formed at the center of the front surface of the table. The switch is installed at the center of the end of the guide groove, and a main body(1) is arranged at the rear end of the table. A guide plate(7) is installed between the table and the main body, and the cylinder is installed at the upper portion of the main body. The compression device for compressing the reference pin is installed at an end of a cylinder rod.
Patent KR-20010090541-A (KR)
Title: Optical seat and method for manufacturing the same
Inventor: HIKASHI KENSAKU
IPC: G03B21/60
Filed: 2001-03-23
Abstract: PURPOSE: An optical sheet is provided to have a high light transmittance and good diffusiveness, possess excellent durability that such optical properties are retained for a long period of time even under high-temperature and high-humidity conditions, and raise no blocking and a production process thereof. CONSTITUTION: An optical properties are changed under high-temperature and high-humidity because spherical fine particles undergo a change, for example, sinking of the fine particles in a direction of a substrate due to the flow of a pressure sensitive adhesive, and that blocking occurs because a pressure sensitive adhesive used in a binder layer comes into contact with another member. Spherical fine particles are bonded directly or through a very thin binder to a substrate in a state of a monoparticle layer, thereby preventing the spherical fine particles from sinking into the binder to provide an optical sheet having high light transmittance and diffusiveness and also having high stability to optical properties. The optical sheet comprising a transparent substrate and a binder layer laminated directly or through another layer on the transparent substrate, wherein spherical fine particles having a particle diameter distribution of 0.8 to 1.0 are embedded in a state of a monoparticle layer in the binder layer so as to partly project from the surface of the binder layer, and a distance from the top of the projected fine particles to the surface of the transparent substrate is from 100% to 110% of the volume average particle diameter of the spherical fine particles.
Patent KR-20020075685-A (KR)
Title: Double Sealing 3 Chamber Boost Pump
Inventor: JANG YONG CHAE
IPC: F04B43/02
Filed: 2001-03-27
Abstract: PURPOSE: A double sealed three-chamber booster pump is provided to improve durability and air-tightness. CONSTITUTION: A pump includes a wobbler housing(21) coupled between a motor housing(11) and a head housing(12) using a bolt(25); a wobbler(22) installed on a shaft(13) with a cam(14) interposed to linearly move; a diaphragm(23) installed to be interposed between the motor housing and the wobbler housing and closely coupled to the wobbler to execute pumping; and a safety valve(24) installed to be fluidically connected with a chamber of the head housing so as to relieve over-pressure.
Patent KR-20020078216-A (KR)
Title: A remote guard and rescue system and the method using the same thereof
Inventor: LEE KEON CHAN
IPC: G08B25/00
Filed: 2001-04-06
Abstract: PURPOSE: A remote guard, watching and rescue system and a rescue method using the system method are provided, to allow a user in critical circumstances to be rescued quickly by detecting the present position of the user. CONSTITUTION: The remote guard, watching and rescue system comprises a GPS satellite(10) for locating the position of a user; a user terminal(20) which detects the present position through the signal from the GPS signal and transmits it wirelessly, input the data inputted by a user, outputs the data received on the display and has both the GPS receiving function and the wireless communicating function; and a control system(30) which converts the present position received from the user terminal into a geographical information, and outputs the converted geographical information on a wide screen and by a printer for the rescue service in the case of critical circumstances of a user.
Patent KR-20020078276-A (KR)
Title: Reinforcement structure of the water tank
Inventor: NOH BYEONG IL
IPC: B65D90/02
Filed: 2001-04-09
Abstract: PURPOSE: A water tank reinforcing structure is provided to secure an inner space maximally, to protect the water quality by cleaning up the inside easily and preventing the corrosion of the inside and to reduce manufacturing costs by simplifying installation structure and works. CONSTITUTION: The water tank reinforcing structure comprises: a deck plate(21) folded in a rugged shape to form a footing wall and provided with a joining wing; a plate(22) connecting each deck plate(21) vertically; a vertical beam(23) and a horizontal beam(23') joining and supporting the deck plate(21) externally; a reinforcing vertical beam(24) and a reinforcing horizontal beam(24') installed in a latticed shape between the vertical beam(23) and the horizontal beam(23') to reinforce the bearing force of the deck plate; lagging materials(25) interposed to the stepped space among the vertical, horizontal beams(23,23') and the reinforcing vertical, horizontal beams(24,24'); and a facing plate(26) containing the lagging materials(25) to face an external wall.
Patent KR-20020078357-A (KR)
Title: System for storage of data and Method for the same in semiconductor process
Inventor: HWANG MIN YEONG
IPC: H01L21/48
Filed: 2001-04-09
Abstract: PURPOSE: A system for storing data in a semiconductor fabricating process is provided to precisely store data and reduce waste of time, by storing the state of a process and measured data in a memory card while a process is performed on a wafer. CONSTITUTION: A memory chip(14) to/from which data of a semiconductor process are inputted/outputted is built in the memory card(10). The memory card includes a display unit(16) for showing the data inputted to the memory chip. Data are inputted/outputted to/from the memory chip built in the memory card by an input/output apparatus(18) separately connected to each process unit. The input/output apparatus is connected to a computer(22) and a network server(20) which control the data inputted/outputted to/from the input/output apparatus.
Patent KR-20020080103-A (KR)
Title: thermoelectric use of heating and cooling with realization unit
Inventor: HUH JEOM SUK
IPC: H01L35/02
Filed: 2001-04-11
Abstract: PURPOSE: An apparatus for operating heating and cooling by using a thermoelectric semiconductor device is provided to perform simultaneously a heating operation and a cooling operation by forming a cooling bar and a heating bar with one body. CONSTITUTION: A heat absorbing portion(20) is connected with one side of a thermoelectric semiconductor device(10). A heat emitting portion(50) is connected with the other side of the thermoelectric semiconductor device(10). A cooling bar(30) is combined with the heat absorbing portion(20) of the thermoelectric semiconductor device(10). A heating bar(60) is combined with the heat emitting portion(50) of the thermoelectric semiconductor device(10). The cooling bar(30) is inserted into an inside of a cold water tank(40). The cooling bar(30) is formed by a thermal conductor of a circular or a polygonal shape. The heating bar(60) is inserted into an inside of a hot water tank(70). The heating bar(60) is formed by the thermal conductor of the circular or the polygonal shape.
Patent KR-20020083246-A (KR)
Title: Ganoderma applanatum extract for the therapy of diabetic diseases
Inventor: LEE HYEONG GYU
IPC: A61P3/10
Filed: 2001-04-26
Abstract: PURPOSE: The use of a Ganoderma applanatum extract prepared by extraction of Ganoderma applanatum in one organic solvent of lower alcohol, water or acetone as an agent for prevention and treatment of diabetes mellitus is provided. The extract can strongly inhibit weight gain while having excellent an effect on reducing blood sugar levels. CONSTITUTION: Ganoderma applanatum is extracted in lower alcohol, water or acetone and then concentrated under reduced pressure or freeze dried. The effective amount of the Ganoderma applanatum extract is 10 to 1,500mg, preferably 50 to 500mg, and a pharmaceutical composition for prevention and treatment of diabetes mellitus contains the Ganoderma applanatum extract and a pharmaceutically acceptable salt or an excipient and is formulated into an oily or aqueous solution, suspension or emulsion, extract, powder, granule, tablet or capsule.