baber/WOPTO huggingface dataset:
Patent KR-20010029571-A (KR)
Title: Power transmission device for sewing machine
Inventor: MATSUMOTO MITSUNORI
IPC: D05B69/02
Filed: 2000-02-24
Abstract: PURPOSE: To reduce the oscillation and noise of transmission part by using timing pulleys and a timing belt as a driving force transmitting means from the main axis of a sewing machine to its subordinate axis. CONSTITUTION: In the power transmission device of the sewing machine, the main axis 40 of the sewing machine to be rotate-driven by a prescribed driving source and the subordinate shaft (an upper shaft 30 e.g.) whose axis line is at a torsion position to that of the axis 40 can be rotate-transmitted by the timing pulleys 34, 42 fixed onto the respective axes and the timing belt 44 set between both of these pulleys.
Patent KR-20010084493-A (KR)
Inventor: SEO SOON JONG
IPC: A23L11/00
Filed: 2000-02-26
Abstract: PURPOSE: A method for preparing soybean milk and an apparatus thereof are provided to improve the flavor and intestinal absorptive property of soybean milk. CONSTITUTION: The method includes the following steps of: (i) separating skins and buds from soybeans and boiling the soybeans at 100deg.C for 10-15min; (ii) crushing the boiled soybean and heating the crushed soybean with 3times of water at 70-80deg.C for 5-10min; (iii) separating the soybean residues from the soybean liquid and stirring the soybean liquid with additives such as salt, sugar, spices and fat and oil at 70-80deg.C for 5-10min; (iv) homogenizing the soybean liquid and the additives and pre-sterilizing the soybean liquid at 70-80deg.C for 5-10min. by stirring; (v) passing the resulting soybean liquid with steam through a sterilizing pipe for 3-5sec and discharging the steam and the smell from the soybean liquid. The apparatus comprises a boiling cauldron with a holding frame placed thereto, a soaking tank installed at the lower part of a discharge port of a pulverizing device placed at one side of the cauldron, a transferring pipe installed at the soaking tank and connected to a filter net of a filter, a soybean liquid discharge pipe of the filter that is connected to a mixing tank coupled to a pre-sterilizing and stirring tank through a homogenizer, a sterilizer with a coiled sterilizing pipe made of Teflon resin and connected to a discharge pipe and a steam supply pipe of the pre-sterilizing tank joined with each other, and a deodorizer coupled to a discharge pipe of the sterilizer.
Patent KR-20010086668-A (KR)
Title: A method for fabricating P-free single mode optical fiber and a system for controlling outer diameter used therefor
Inventor: KANG BYEONG YUN
IPC: C03B37/01
Filed: 2000-03-02
Abstract: PURPOSE: Provided is a method of preparing single mode optical fiber using conventional modified chemical vapor deposition process without addition of phosphorus to improve long-ranging reliability of the optical fiber. CONSTITUTION: The method comprises the following steps of: injecting gas mixture containing no phosphorous through injection port of hollow tube which contains the injection port and ejecting port; rotating the tube and simultaneously moving a heating means across a longitudinal direction of the tube; heating the tube with the heating means to fill the inner of tube by forming deposit derived from the reaction of the gas mixture on the internal surface of the tube; continuously monitoring modification of the tube via observing means; controlling outer diameter of the tube by changing the internal pressure of the tube according to monitoring state; and minimizing rapid decrease of temperature on the side of the ejecting port of the tube.
Patent KR-20010086908-A (KR)
Title: Multi function hands free
Inventor: KIM GI YEONG
IPC: H04R1/10
Filed: 2000-03-04
Abstract: PURPOSE: A hands free is provided to offer the combination multiple function of a microphone and an ear phone, which is capable of using a mini-cassette and a potable phone together by recording and replaying a communication content in communication of the potable phone. CONSTITUTION: A terminating sound detecting unit(41) detects a terminating sound from a potable phone. A control unit which is micro processor(IC1), when the terminating sound is detected from the terminating sound detecting unit(41), detects the signal inputted from a potable phone communication switch(SW1), a recording switch(SW2), and a replaying switch(SW3), controls it using a reference program, and outputs the controlled signal. An auxiliary memory unit(43) at which an integrated circuit(IC3) stores an output status and a memory frequency through the signal by controlling and outputting from the control unit(42). A call switching and changing unit(44) forms and cuts off a call signal and a call path in a potable phone by the signal out putted from the control unit(42). A memory unit(45) replays and outputs the recorded content with the combination of a microphone and an earphone by the signal out putted from the control unit(42).
Patent KR-20000036514-A (KR)
Inventor: PARK JONG HYOUK
Filed: 2000-03-18
Abstract: PURPOSE: An advertisement chatting of the internet and in-line communications is provided to supply chatting and advertisement services to the user in accordance to the user's age, sex, and other information. and to confirm advertisement effects by confirming the input record of the user through vocal and typing recognition systems. CONSTITUTION: An advertisement chatting of internet and PC communication is composed of input, reception, display, and confirmation. User inputs the member information, composed of age, sex, and others, and receives an ID. Advertisements in accordance to the user's information is gathered and provided to the member. The member inputs the information requested by the advertisement through key or voice input methods while chatting or talking to others using the program. Database confirms whether the inputted information is identical to requested information, and if yes, proceed to next operations.
Patent KR-20000036723-A (KR)
Inventor: KIM BYEOUNG RAI
IPC: F16H3/44
Filed: 2000-03-27
Abstract: PURPOSE: A continuously variable transmission is provided to change speed automatically depending on the change of input/output torque with a gear. CONSTITUTION: A gear-type continuously variable transmission consists of a conical screw gear(1), a bevel gear type differential gear(2) and a ring gear(3). A couple of input/output shafts(5,6) are located on the same axis as the differential gear and the other end is connected with the conical screw gear. The ring gear and a differential gear body move back and forth in a structure of a spline or a ball screw. The ring gear is used by setting the differential gear body, the conical screw gear and a pinion gear(30) at the same screw thread.
Patent KR-20000036753-A (KR)
Inventor: KIM SEUNG WOOK
IPC: C12N1/20
Filed: 2000-03-28
Abstract: PURPOSE: Microorganism composite (KCCM 10165) for the fermentation organic waste having a large amount of hydrocarbone and salts is provided which degrades organic waste for the purpose of making organic animal feed-stuff or fertilizer. CONSTITUTION: 1g of food waste is vortexed for 10 minutes, diluted with 10 ml of saline and smeared on MRS agar plate, nutrient agar plate, potato dextrose agar plate or YPD agar plate and cultured at 30°C for 2-3 days to obtain 80 colonies of bacillus, yeast, lactobacillus and fungi. 16 strains are selected based on the growth rate and the strong degradability of protein, starch, cellulose. 6 strains are selected finally based on salts and thermo tolerance. The six strain, Bacillus sp. HE-05, Bacillus sp. HE-06, Bacillus sp. HE-07, Bacillus sp. HE-08, Bacillus sp. HE-09, Bacillus sp. HE-10, Torulopsis sp. HE-11, Torulopsis sp. HE-11 are mixed with three strains, Saccharomyces sp. HE-04, Aspergillus sp. HE-04, Rhizopus sp. HE-02, Lactobacillus sp. HE03. The composite is suspended in liquid for the distribution or preservation or mixed with powder of rice bran, wheat bran, corn bran, barley bran, corn, bread or biscuit.
Patent KR-20010093482-A (KR)
Title: a towing device of a rescue vehicle
Inventor: KIM SEONG YUN
IPC: B60D1/00
Filed: 2000-03-29
Abstract: PURPOSE: A tow device of a rescue vehicle is provided to perform traction conveniently by moving and turning arms with hydraulic cylinders, and by lifting the front of the trailing car with putting the arms under the trailing car. CONSTITUTION: A supporting plate(1) is fixed in a rear frame of a rescue vehicle, and a first hydraulic cylinder(2) is installed in a fixing plate. The upper part of a vertical arm(3) is fixed in the rear frame by a hinge, and the lower part is hinge-combined with the first hydraulic cylinder. A second hydraulic cylinder(6) is mounted in a reinforcing arm(4) and a fixing arm(5). A horizontal arm(8) is supported with a supporting member(7) hinge-combined with a flange(5a) of the fixing arm. The rear part of the horizontal arm is fixed in the second hydraulic cylinder by a hinge. A moving arm(9) having a lifting member(10) and a lifting bar(11) is inserted to the horizontal arm, and connected to a third hydraulic cylinder(12) in the horizontal arm. The bumper and the lower axle of the trailing vehicle are moved up with operating vertical, horizontal and moving arms by first, second and third hydraulic cylinders. The rear part of the rescue vehicle is placed in the front of the trailing vehicle in towing, and the lifting member and the lifting bar are placed in the bumper or under the axle of the trailing vehicle by driving the third hydraulic cylinder. The trailing vehicle is put on the lifting member and the lifting bar with turning the horizontal arm by the second hydraulic cylinder, and the front of the trailing vehicle is lifted with turning the vertical arm upward by the first hydraulic cylinder.
Patent KR-20010006979-A (KR)
Title: Input device
Inventor: KAYAMA TAKASHI
IPC: H05K7/12
Filed: 2000-04-11
Abstract: PURPOSE: To provide an input device which can be reduced in both thickness and size and can give a sense of operation and of sophistication to the user of the device. CONSTITUTION: An input device, which is constituted in such a way that the user of the device can input a desired command by operating the device with fingers 12, is provided with an enclosure 20, switch contact sections 50-54 arranged in the enclosure 20 and rotary members 30 for operation which are rotatably arranged correspondingly to the contact sections 50-54, partially protruded from the holes of the enclosure 20, and pressed by a user for operation. The input device is also provided with a support member, which supports the rotary members 30-34 by having the user press the members 30-34 against the enclosure 20 and operates the contact section 54 against the pressing force, when the user presses the contact section 54.
Patent KR-20000049607-A (KR)
Inventor: JANG SOON HYOUNG
IPC: B05B17/08
Filed: 2000-04-17
Abstract: PURPOSE: An umbrella-type fountain is provided to give the improvement on specific functions of folding/unfolding its structure to show some further interests, such as an esthetic sensation and a repeated operation thereof other than the fountain itself functions, as well as the easy of mounting and dismantling the structure, if necessary. CONSTITUTION: A umbrella-type fountain is shown in detail as indicated in figure 2. Referring to fig 2, such a fountain is comprised of a rib ring(1), a stick, a connecting cap(3), an upper covering(4), a cylinder, an upper piston, a lower piston, an upper fixation pin(6a), a lower fixation pin(7a), a lower covering, a connection rod and unfolding plates(9a, 9b). In especially, the umbrella is characterized in that the fountain is performed successively in folding or unfolding it by applying the hydraulic pressure itself to allow a direction converter to operate it repeatedly.
Patent KR-20010097435-A (KR)
Inventor: JOO JE CHUL
IPC: G06Q50/22
Filed: 2000-04-22
Abstract: 본 발명은 처방전 전달시스템 및 그 방법에 관한 것으로서, 병원에서 발급된 처방전에 따라 조제된 약을 환자가 용이하게 수령할 수 있으며, 처방전의 분실 및 위조의 위험을 방지할 수 있고, 의사가 각 환자의 과거 병력과 처방내역 등을 종합적으로 확인할 수 있게 되어 더욱 신뢰성 있는 진료와 처방이 이루어질 수 있도록 한 처방전 전달시스템 및 그 방법을 제공하는데 그 목적이 있다. 
     본 발명은, 다수의 병원컴퓨터와 다수의 약국컴퓨터 및 운영자컴퓨터가 인터넷망을 통하여 상호 접속되며; 상기 병원컴퓨터는 처방전과 그 환자정보를 인터넷망을 통하여 상기 운영자컴퓨터로 전송하여, 상기 환자가 희망하는 약국에서 처방전에 따른 약이 조제된 후, 해당 접수증을 제출하는 환자에게 그 조제약이 전달되도록 요청하며, 상기 약국컴퓨터는 상기 운영자컴퓨터로부터 해당 처방전을 다운로드받으며, 상기 운영자컴퓨터는 각 병원컴퓨터로부터 처방전과 해당 환자정보를 전송받고 상기 환자가 희망하는 약국컴퓨터에게 상기 처방전과 관련정보의 다운로드와, 처방전에 따른 약의 조제와, 접수증을 제출하는 환자에게로의 조제약 전달을 요청하도록 프로그래밍되는 것을 특징으로 한다.
Patent KR-20010104853-A (KR)
Inventor: YUN BYUNG CHUL
Filed: 2000-05-16
Abstract: 본 발명에 의한 2가지 겸용 화장품 용기는, 아크릴을 재질로 하여 총길이는 11.5cm 내외이며 지름은 가운데 부분이 2cm 내외이고, 양쪽으로 뚜껑이 있고 한쪽은 고무 패킹이 삽입되며, 가운데가 반절 막혀 있는 구조이고, 한 쪽은 로션을 담고, 또 다른 한쪽은 고무 패킹을 설치하여 스킨을 저장하여도 스킨이 누설되지 않게 구성됨을 특징으로 되어 있으므로, 스킨과 로션등 각각 2개의 화장품을 샘플용기에 담아 휴대하며 사용하던 것을 하나의 용기에 담을 수 있게 만들어 이를 간편하게 남녀 누구나 호주머니나 핸드백 및 가방에 손쉽게 휴대하여 사용할 수 있는 장점이 있어, 스킨과, 로션등 따로따로 가지고 다녀야 되는 불편을 해소시킨 제품이다.
Patent KR-20000058415-A (KR)
Inventor: OM JAE PUNG
IPC: F24H1/00
Filed: 2000-05-06
Abstract: PURPOSE: A bedroom volume reducing system is provided to reduce a volume of a bedroom to be cooled or heated while users sleeping for saving energy consumption and reducing noise and vibration by raising cool or warm air to the ceiling of the bedroom when not sleeping and lowering the air down to the bottom of the bedroom. CONSTITUTION: A bedroom volume reducing system includes a main body(32), p-type semiconductor(30) and n-type semiconductor(23) sealed and fixed in the main body by penetrating the main body, a copper plate(29) and a heat dissipating plate(27) mounted in the main body and a cotton fabric(28) and connected to the p- and n-type semiconductors, copper plates(1,6) respectively attached on outer parts of the p- and n-type semiconductors, a heat dissipating plate(7) fixed in a heat dissipating part(37), DC conversion device(33) and an anion generating humidifier(11) mounted outside the main body, and a reduction motor(3) and a roller(5) of a fixing plate(8) connected to a rope fixing element(17) mounted in the main body by passing four wire ropes(16) through an intermediate roller(14) and a nozzle(26) mounted on the fixing plate, so that an inner space formed by the cotton fabric and the main body is cooled or heated.
Patent KR-20010106878-A (KR)
Title: 웹 환경의 건설 발주, 견적 사이트 네트웍 시스템
Inventor: KWON GWANG SEOP
Filed: 2000-05-23
Abstract: 본 발명은 건설공사, 건자재 구매, 건설장비 임대를 발주하고자 하는 업체가 회사의 업체소개와 함께 발주내용을 인터넷 웹 상에 등록하면 웹 data base 프로그램에서 발주서를 저장하며 웹사이트에 발주내용이 공개된다. 발주한 내용에 해당되는 공사용역, 건설자재발주, 건설장비임대에 대한 용역을 제공할 수 있는 업체가 웹에서 공개된 발주내용을 확인하고 견적서를 웹 상에서 제출하면 해당 업체에서 제출된 견적서 발주내용을 등록한 업체에서만 확인하여 적정 업체를 선정할 수 있는 시스템을 기초로 하여 이러한 시스템을 요구한 건설기업체의 홈페이지에 부착하여 발주내용을 공개할 경우 기업 대 기업간의 전자상거래를 유도할 수 있으나 중소형의 건설업체는 홍보의 어려움으로 홈페이지의 방문자 숫자가 대단히 적어 발주시스템의 실효를 기대하기 힘들다. 따라서 이러한 시스템을 기업체에 제공하여 사용하게 하고 기업체는 발주할 외주공사, 자재구매, 장비임대에 관련된 내용을 자사 홈페이지의 발주사이트에 게시하면 발주할 내용이 웹 프로그램에 내장된 전송 프로그램에 의하여 발주정보를 Net Work 총괄 관리사이트로 발주 내용이 게재된다. Network 총괄관리 사이트에 게시된 내용에 대하여 견적을 제출하고자하는 업체나 용역제공자는 해당내용을 클릭하면 발주한 업체의 홈페이지의 관련 발주사이트에 다시 연결되어 관련 내용에 대한 견적을 제출할 수가 있다. 또한 발주 업체에 관련된 각종 정보를 얻을 수 있다.
Patent KR-20010107141-A (KR)
Inventor: BAEK GEUM JU
IPC: H01L21/203
Filed: 2000-05-25
Abstract: 본 발명은 LCD 제조 공정에서 기판 위에 박막을 형성하는 스퍼터링 장치에 관한 것으로, 더 상세히 설명하면 TFT LCD(Thin Film Transistor LCD)의 기판에 배선용 금속을 증착하는 데 사용되는 스퍼터링 장치에 관한 것이다.  본 발명의 스퍼터링 장치는 냉각판에 파티클이 쌓이지 않도록 가이드 링을 구비하여 스퍼터링 장치를 구성함으로써 파티클에 의한 웨이퍼의 오염을 방지하고자 한다.  본 발명의 스퍼터링 장치를 반도체 소자 생산에 적용하면 기존에 수행했던 세정 작업이 단순해지고 공정 효율을 향상시킬 수 있다.  그리고 기존에는 점검시 냉각판을 세정해야하는 번거로움이 있었는데 본 발명의 가이드 링은 쉽게 교환이 가능하여 점검에 소요되는 시간을 줄일 수 있다.
Patent KR-20010109708-A (KR)
Inventor: NAM JONG HYUN
Filed: 2000-06-02
Abstract: 본 발명은 고지혈증, 간기능 조절 효과가 있는 천연차 및 그 제조방법에 관한 것으로서, 결명자를 제1원료로 하고, 백화사설초를 제2원료로 하며, 마가목 및/또는 지구자를 첨가할 수 있는 천연차 및 그 제조방법을 제공하며, 본 발명의 분말, 절편 또는 액상의 천연차를 1일 2회 복용하여 고지혈증 치료 및 간기능 회복 효과를 얻을 수 있다.
Patent KR-20000064175-A (KR)
Title: Hydraulic driving type parking equipment
Inventor: KOO JANG HOE
IPC: E04H6/12
Filed: 2000-06-10
Abstract: PURPOSE: A hydraulic driving type parking equipment is provided to rise and fall a lift by expansion driving of hydraulic cylinder, so that the parking equipment has enough bearing capacity against the lift with a little force. CONSTITUTION: A hydraulic driving type parking equipment comprises an elevator driving part(1), a lateral driving part, a longitudinal driving part and a fork part. In the elevator part, numerous hydraulic cylinders are connected vertically and formed to be expanded in multi-stage type, and one end of wire rope(13) is fixed on the hydraulic cylinder(11) by a rope pulley(12) that is installed in the upper part of hydraulic cylinder. In the lateral driving part, a turntable is installed in the lift(100) and driven by a secondary electric motor in the lateral direction. In the longitudinal driving part, the turntable is driven in the longitudinal direction along a guide rail that is installed in the frame of lift. The fork part are installed in the both side of turntable to be crossed with an unevenness part of pallet(120), and one end of fork part is connected to the cylinder of turntable, and then the lower part of fork part is supported by supporters that are fixed in the turntable.
Patent KR-20000058553-A (KR)
Inventor: KIM JIN KYUNG
IPC: A23B7/14
Filed: 2000-06-13
Abstract: PURPOSE: A preparation method of Kimchi powder is provided, which is combined with wheat flour or rice flour for a substitute food for bread, confectionery, hamburger, ramen nooddles, noodles, or a diet food. CONSTITUTION: A preparation method of Kimchi powder is characterized by comprising the following steps: (i) heating vegetable or pickling vegetable in a saccharide solution so as to soften vegetable and so as to absorb flavor; (ii) putting auxiliary material, lactic acid bacteria, Kimchi soup, and mixing and aging; and (iii) after naturally drying or hot blast drying or freeze drying the above Kimchi, crushing the same or in the reverse order. The auxiliary material is characterized by comprising a brown seaweed, a sea tangle, an agar-agar, laver, a sea staghorn, green laver.
Patent KR-20020000662-A (KR)
Inventor: KO DU HYEON
IPC: G02F1/1343
Filed: 2000-06-27
Abstract: PURPOSE: A multi-domain LCD(Liquid Crystal Display) is provided to improve response speed and definition by controlling the arrangement direction of LC molecules. CONSTITUTION: A multi-domain LCD consists of: a first side electrode(43) formed around a pixel electrode(41); a second side electrode(45) connected with the first side electrode by crossing the pixel electrode in a diagonal direction; and first and second dielectric ribs(47,47a) formed in the same direction as the second side electrode at both sides from the center of the second side electrode. LC molecules are arranged regularly toward the second side electrode as the second side electrode is formed in a diagonal direction of the pixel electrode. The first and second dielectric ribs are formed on a counter substrate corresponding to both sides of the second side electrode to prevent the arrangement of the LC molecules from being changed abnormally by strong signal twist in the center of the second side electrode. Therefore, all of the LC molecules in the pixel electrode are arranged regularly toward the second side electrode.
Patent KR-20020002126-A (KR)
Title: System and method of operating call detail record for the monitor of call history
Inventor: CHAE JEONG GEUN
IPC: H04M3/36
Filed: 2000-06-29
Abstract: PURPOSE: An operation system and method of a call detailed record for generating a call history are provided to store or transmit a call detailed record to a different system by independently making information for history contents related to generated calls accumulated in a buffer memory of a phone exchange regardless of a service system. CONSTITUTION: A caller requests a call request with a callee from a telephone exchange through a general phone network(S200). The telephone exchange attempts a call line connection between the caller and the callee upon receipt of the request from the caller(S201). If the line connection is failed between the caller and the callee, the telephone exchange transmits a busy signal to the callee for termination(S202). If the line connection is successful, a call is generated according to the line connection between the caller and the callee(S203). After a call type is changed or a call is terminated, a call detailed record is generated on the basis of the call history information accumulated in a buffer memory(S204). The call detailed record generated in the telephone exchange is transmitted to a statistics data processing service system and the call history information and the call detailed record accumulated in the buffer memory are deleted(S205). The statistics data processing service system transmits the call detailed record to a call information database for storing it(S206). A statistics data system and a billing data system access the call detailed record stored in the call information database to utilize it(S207).
Patent KR-20010049764-A (KR)
Title: Polyolefin resin composition
Inventor: HORIKOSHI MASAYOSHI
IPC: C08K5/49
Filed: 2000-07-12
Abstract: PURPOSE: A resin composition is provided to exhibit excellent impact resistance and transparence by compounding a specific amount of a nucleating agent and a specific amount of a low density polyethylene or a linear low density polyethylene with a polypropylene-ethylene block copolymer. CONSTITUTION: 0.1 to 0.6 pt.wt. of a nucleating agent and 20 to 100 pts.wt. of a low density polyethylene or a linear low density polyethylene are compounded with 100 pts.wt. of a polypropylene-ethylene block copolymer. Further 0.001 to 0.1 pt.wt. of a peroxide such as 1,3-bis(t-butylperoxyisopropyl) benzene or the like is preferably compounded with the obtained polypropylene resin composition. The block copolymer to be used preferably has MFR of 0.5 to 100 g/10 min, an ethylene content of 3 to 15 wt.%, a random copolymer content of 6 to 30 wt.% and a density of 0.895 to 0.910 g/cm¬3.
Patent KR-20020007024-A (KR)
Title: Internet based remote control system
Inventor: KIM EO JUN
IPC: G06F17/00
Filed: 2000-07-14
Abstract: PURPOSE: A remote control system using the Internet is provided to display data on the Internet as 3D image. CONSTITUTION: A server controller(14) of a server(10) authenticates a user and transmits driving data(12) including advertisements to an Internet interface(112) of a user PC(100) if the user logs in a web site. The driving data are converted into a format for controlling an operating unit(50) and transmitted to a computer interface(52). An operation control unit(60) outputs a message to a speaker(64) with flickering an LED(Light Emitting Diode,62) according to the driving data. Thereby, the operating unit displays the advertisements. The operating unit alarms a user of receiving a mail, displaying the text files of a chatting room and transmitting a message for notices as well as displays advertisements.
Patent KR-20020009266-A (KR)
Title: Transistor in a semiconductor device and fabricating method thereof
Inventor: PARK BYEONG JU
IPC: H01L21/8232
Filed: 2000-07-25
Abstract: PURPOSE: A transistor of a semiconductor device and a method for fabricating the same are provided to reduce a step portion between a surface of a gate and a surface of a substrate by embedding the gate in the substrate and forming a salicide layer thereon. CONSTITUTION: A trench is formed by removing a part of an active region of the first conductive type semiconductor substrate(20). A sidewall spacer is formed on an inner side of the trench. The sidewall spacer is formed by an insulating material. A gate insulating layer(24) is formed on a bottom portion of the trench. A conductive plug is formed to bury the trench. A high density doping region(26) of the second conductive type is formed on the exposed active region. A salicide layer(27) is formed on an upper face of the conductive plug and an upper face of the high density doping region(26). A space is formed between the gate insulating layer(24), the conductive plug, and the inner side of the trench by removing the sidewall spacer. A low density doping region(280) of the second conductive type is formed on the substrate(20) exposed by the space.