baber/WOPTO huggingface dataset:
Patent KR-20020038045-A (KR)
Title: Method of fabricating mos transistor having polycide gate electrode
Inventor: YOON JAE MAN
IPC: H01L21/336
Filed: 2000-11-16
Abstract: PURPOSE: A method for fabricating a metal oxide semiconductor transistor having a polycide gate electrode is provided to prevent metal silicide from being exposed to etchant in a wet etch process for eliminating both edge portion of a gate oxide layer damaged plasma charging, by forming a polysilicon spacer on the sidewall of the metal silicide. CONSTITUTION: A gate oxide layer(12), a polysilicon layer, a metal silicide layer and a gate passivation layer are formed on a semiconductor substrate(10). The gate passivation layer and the metal silicide layer are sequentially patterned until the polysilicon layer is exposed so that a gate passivation layer pattern(18a) and a metal silicide gate(16a) are formed. A conformal capping polysilicon layer is formed on the resultant structure along a step of the gate passivation layer pattern and the metal silicide gate. The capping polysilicon layer and the polysilicon layer are sequentially dry-etched by using the gate passivation layer pattern as an etch stop layer until the gate oxide layer is exposed so that a capping polysilicon spacer(22a) is formed on the sidewall of the metal silicide gate while a polysilicon gate is formed. The exposed gate oxide layer is wet-etched. A thermal oxide process is performed regarding the resultant structure to form a thermal oxide layer thicker than the gate oxide layer in a portion under both edge portions of the polysilicon gate.
Patent KR-20020039423-A (KR)
Title: Screw having Sub-Dismemberment Hole
Inventor: KIM YONG BEOM
IPC: F16B27/00
Filed: 2000-11-21
Abstract: PURPOSE: A screw having auxiliary disassembling hole is provided to permit the screw head to be easily disassembled even when the screw groove formed at the screw head is abraded. CONSTITUTION: A screw(20) comprises a screw head(21) having a screw groove(21a); and a screw body(22) having a screw thread(22a), and which rotates in a predetermined direction so as to be coupled/disassembled to/from a coupling part. The screw head has a pair of through holes(21b) for insertion of a disassembling tool including an L-shaped wrench(W), such that the screw head is rotated in a predetermined direction when the screw groove formed at the screw head is worn out due to frequent assembling or disassembling work.
Patent KR-20020048605-A (KR)
Title: Thermoplastic Styrene/Acrylonitrile Copolymer and Method of Preparing the Same
Inventor: KIM JEONG HYEON
IPC: C08F212/10
Filed: 2000-12-18
Abstract: PURPOSE: Provided are a novel thermoplastic nitrile-based copolymer and the method thereof. The new copolymer is a non-linear α-alkyl styrene-acrylonitrile(SAN) resin prepared by copolymerizing monomer with many functional groups in the polymerization of α-styrene and cyanovinyl compounds. The resin has excellent properties of heat resistance and processability. CONSTITUTION: The preparation method comprises: bulk polymerizing or solvent polymerizing, in the presence of a polymerization initiator, 10-90wt.% of α-alkylstyrene, 15-40wt.% of cyanovinyl compound, 0-50wt.% of styrene and 0.005-7wt.%(based on 100wt.% of the above compounds) of copolymerizable monomer containing multi-functional groups; and separating by devolatilization of unreacted monomers and organic solvent in the polymerization product at high temperature under reduced pressure. The copolymerizable monomer containing multi-functional group is selected from a copolymerizable monomer with allyl-based multi-functional groups, a copolymerizable monomer with acrylate-based multi-functional groups having more than two unsaturated bonds and their mixtures, such as isocyanurate, trialkyl isocyanurate and divinylbenzene, and an aromatic compounds. The polymerization initiator is used alone or in their mixtures selected from 1,1-bis(t-butylperoxy)3,3,5-trimethylcyclohexane, 1,1- bis(t-butylperoxy)3,3,5-cyclohexane, D-2-ethylhexylperoxycarbonate and 1-t- butylazo-1-cyanochlorohexane.
Patent KR-20020049231-A (KR)
Title: Method for controlling automatic transmission during fault of sports mode select switch for a vehicle
Inventor: CHO YEONG SIN
IPC: F16H63/40
Filed: 2000-12-19
Abstract: PURPOSE: A control method for sports mode-selective switch trouble of an automatic transmission for a vehicle is provided to make normal traveling possible when the sports mode-selective switch in an automatic transmission gets out of order. CONSTITUTION: In a vehicle having an automatic transmission equipped with a sports mode, a TCU(Transmission Control Unit) receives the detecting signal of an inhibitor switch, a sports up switch, and a sports down switch and ascertains whether at least any one among a preset speed change range signal, a sports up shift signal, and a sports down shift signal is input within the preset critical time. If the TCU doesn't receive any signal from the inhibitor switch within the critical time, and receives at least any signal between the sports up shift signal and sports down shift signal, the TCU performs speed change control at one-stage of the shifting range. If the condition for judging is realized, the TCU performs speed change control according to the regular shift pattern.
Patent KR-20020051322-A (KR)
Title: Multi-channal vibration monitoring apparatus
Inventor: CHOI YEONG GYU
IPC: G08C19/00
Filed: 2000-12-22
Abstract: PURPOSE: A multi-channel vibration monitoring apparatus of rotating instrument is provided to prevent the failure of instrument, to simplify the installation of the instrument, and to ensure the stability of data. CONSTITUTION: The multi-channel vibration monitoring apparatus of rotating instrument consists of a plurality of vibration sensors(1) installed on each components of the rotating instrument to be monitored for measuring the vibration of a corresponding bearing part; a plurality of multi-channel vibrating modules(2) for successively and selectively amplifying, filtering, and integrating signals from the sensors, and also performing the process of PMS/Peak/Envelope/FFT thereof, and then converting its results into digital signals; a central control monitoring device; and a communication network.
Patent KR-20020053302-A (KR)
Title: Clutch system for motor vehicle
Inventor: KIM JONG BOK
IPC: B60K15/077
Filed: 2000-12-27
Abstract: PURPOSE: A clutch operating system of a vehicle is provided to offer convenience to a driver, to stabilize the starting on an uphill road, and to restrain the wear of a clutch by automatically operating a clutch with the movement of a shift lever. CONSTITUTION: A clutch operating system of a vehicle comprises a lever cover having a guide groove for the operation of a shift lever, first lever position sensors(53) installed in the first speed range and the R(Reverse) range of the guide groove and to sense the movement of the shift lever and to make the semi-clutch state possible, second lever position sensors(59) installed in the second, third, fourth, and fifth ranges of the guide groove, a clutch position sensor(61) installed in a clutch to sense the on/off and semi-clutch states of the clutch, an ECU(Electronic Control Unit)(63) for the generation of a clutch operating signal depending on the output signals of the sensors, and an actuator(65) for the operation of the clutch by the clutch operating signal of the ECU.
Patent KR-20020053320-A (KR)
Title: A louver's structure of the ceiling type air-conditioner
Inventor: PARK YUN GI
IPC: F24F1/00
Filed: 2000-12-27
Abstract: PURPOSE: A structure for driving louver of ceiling cassette type air conditioner is provided to accurately control angles of the louvers and to suppress torsion of the louvers generated on control of the angles. CONSTITUTION: A structure comprises louvers(52) installed on a plurality of outlets formed on an intake grill to guide discharge direction of air; a plurality of connecting axes(54) connecting both ends of the louvers; a step motor(60) connected with one of the connecting axes to rotate the connecting axis normally or reversely; and a transmitting device installed between the step motor and the connecting axis connected with the step motor.
Patent KR-20020053542-A (KR)
Title: Method of forming a contact plug in a semiconductor device
Inventor: LEE SEOK GYU
IPC: H01L21/283
Filed: 2000-12-27
Abstract: PURPOSE: A method for manufacturing a contact plug of a semiconductor device is provided to enhance the reliability of a process by preventing a short between the SEG(Selective Epitaxial Growth) plugs while forming the SEG plug to a target height. CONSTITUTION: A semiconductor substrate(11) exposing a junction is prepared and the first SEG thin film(18a) is formed on the junction by an SEG method. After depositing the first insulation film(19) on the surface, between the first SEG thin films is insulated without a void by perfectly removing the first insulation film excluding the first insulation film buried between the first SEG thin films and exposing the upper part. The SEG epitaxial thin film of the target height is obtained by repeating the previous process under a state insulating between the contact plugs. After forming and flattening the second insulation film, the upper part of the SEG thin film is exposed by etching a fixed area.
Patent KR-20020053649-A (KR)
Title: Display and osd controlling method thereof
Inventor: K S PRABHKAR
IPC: H04N21/485
Filed: 2000-12-27
Abstract: PURPOSE: A display device and an OSD(On Screen Display) controlling method are provided to arrange a pointer in a central area, and to regulate desired functions with minimum frequencies of selecting a selection and input unit, so as to give convenience users. CONSTITUTION: A display part(3) displays video signals. An OSD generating part generates a menu matrix(21) in which a plurality of menu icons(25) are arranged by a plural matrix to adjust a display state of the display part, and displays the generated display matrix on the display part. A selection and input part(15) enables a user to select the menu icons. And a controller controls a pointer for the selection through the selection and input part to be located on a menu icon in a central area of the menu matrix, upon initial display of the menu matrix. Also the controller changes a display state of the display part according to an input signal of the selection and input part.
Patent KR-20020055108-A (KR)
Inventor: YANG BI RYONG
IPC: H01L27/105
Filed: 2000-12-28
Abstract: PURPOSE: A method for fabricating a ferroelectric capacitor is provided to easily form a capacitor structure within the diameter of a via hole in which a capacitor region is formed, by forming a plug and an adhesion layer before the capacitor structure is formed. CONSTITUTION: The plug(33) is formed on a semiconductor substrate(31). The first interlayer dielectric(32) is formed on the plug. The first interlayer dielectric is selectively patterned to form the first via hole exposing the capacitor region. An oxide layer sidewall is formed at the corner of the first via hole. A stack layer composed of a lower electrode, a ferroelectric layer and an upper electrode is formed on the first interlayer dielectric including the first via hole. A chemical mechanical polishing(CMP) process is performed regarding the stack layer to form a capacitor filled in the first via hole. The first hydrogen barrier layer(43) and the second interlayer dielectric(35) are stacked on the capacitor. The second interlayer dielectric is selectively patterned to form the second via hole. The second hydrogen barrier layer(45) and a metal interconnection layer(46) are stacked on the second interlayer dielectric including the second via hole.
Patent KR-20020058490-A (KR)
Title: Gamma correction circuit for analog gamma-correction of CMOS image sensor
Inventor: CHOI SU CHANG
IPC: H04N5/202
Filed: 2000-12-30
Abstract: PURPOSE: A gamma correction circuit for analog gamma correction in a CMOS(Complementary Metal Oxide Semiconductor) image sensor is provided to perform gamma correction in analog, so as to reduce quantization noise and simply implement a circuit for the analog gamma correction. CONSTITUTION: In a gamma correction circuit that performs analog gamma correction for data outputted from each pixel of a CMOS image sensor, a nonlinear lamp voltage generation unit generates a nonlinear lamp voltage by having a DAC(Digital-to-Analog Converter,100) and a first integrator(120) and a second integrator(140). The DAC receives a gain value of a digital code from an external control block, for conversion into an analog voltage. The first and second integrators configured in switch capacitor structures integrate the converted analog voltage twice consecutively. And an output of the DAC is a gain factor of the nonlinear lamp voltage generation unit.
Patent KR-20020058654-A (KR)
Inventor: KIM HYO YEONG
IPC: H02J7/00
Filed: 2000-12-30
Abstract: PURPOSE: A charging method for charging current compensation is provided to shorten charging time. CONSTITUTION: A charger includes two slots for charging the batteries at the same time. In case of supplying constant currents constantly to the slots and changing a constant current supplying section to a constant voltage section, a charging current of a second slot increases as much as the decrement of a first slot. In the constant voltage section, the charging current is sum of a supplying current of the first slot and the second slot.
Patent KR-20020057120-A (KR)
Title: A shower apparatus for washing machine
Inventor: CHOI GANG MO
IPC: D06F25/00
Filed: 2000-12-30
Abstract: PURPOSE: A shower device of a drum type washing machine is provided to be opened or closed by the pressure of washing water supplied to the shower device and spray water in various directions by forming a shower nozzle in a tapered part of a front end, thereby removing the detergent bubbles on an inner surface of the door in a short time and preventing the backflow of the water along the shower device. CONSTITUTION: A shower device of a drum type washing machine includes a shower hose(20) for supplying washing water, a shower connector(30) connected to a front end of the shower hose and positioned correspondingly to an upper end of an inner surface of a door for transmitting the water received from the shower hose, and a shower nozzle(40) mounted in a front end of the shower connector to be opened or closed by the pressure of the water supply to selectively supply the water to the upper end of the inner surface of the door.
Patent KR-20010021538-A (KR)
IPC: A61P25/22
Filed: 1998-07-03
Abstract: 본 발명은 하기 화학식 I의 트리아졸 화합물에 관한 것이다.  본 발명의 화합물은 높은 도파민-D 3 -수용체 친화성을 가지므로, 도파민-D 3 -리간드 반응성 질병의 치료에 사용될 수 있다. 
     <화학식 I> 
     
       
     
     상기 식에서, Ar 1 , A, B 및 Ar 2 는 본문에 기재된 바와 같다.
Patent KR-20010021754-A (KR)
Title: 가요성 냉동 매체용 수성 및 결빙 플랜트
IPC: F28D20/02
Filed: 1998-07-10
Abstract: 열 감지 물질의 선적에 사용되는 포장재를 조합시키는 장치는, 수성 모듈(11), 결빙 모듈(40), 및 분배 모듈(45)을 활용하는 것이다.  선택된 길이 와 폭으로 이루어진 연속성 웨브를 형성하는 슈퍼 흡수 폴리머 기본 냉동 매체(117)로 이루어진 롤이 드라이 저장소에서 유지된다.  이들은 슈퍼 흡수 폴리머를 함유하는 셀을 분리하는 웨브 물질을 따르는 크기로 절단될 수 있는 것이다.  상기 웨브 또는 패드는 슈퍼 흡수 폴리머에 적절한 수성 유체를 공급하도록 제공되는 딥 탱크(17) 또는 스프레이 시스템(26)을 포함하는 수성 모듈(11) 쪽으로 전진한다.  다음, 수성 웨브는, 셀 내에 흡수된 유체가 결빙되는 장소에서 -10℉ 또는 그 미만의 온도를 가지는 결빙실(40)을 통하여 전달된다.  모듈러 시스템의 작은 푸트프린트는 적절한 크기 및 형태로 절단되는 작업을 포함하는 필요한 처리동작이 선적 컨테이너에 신선한 물질 둘레에 배치되는 소비자의 선적 구역에서 달성될 수 있는 것을 의미하는 것이다.
Patent KR-20010032363-A (KR)
Title: 프리트 지그 조립체
IPC: H01J9/26
Filed: 1999-09-16
Abstract: 본 발명은 음극선관의 구성 요소인 유리 콘(cone)과 디스플레이 스크린을 정렬하고 봉합하는 과정 중에 사용되는 프리트 지그(frit jig)와 가요성 볼트의 조립에 관한 것이다. 볼트(13)에 의하여 제공되는 가요성은 봉합 과정에 수반되는 가열 단계 동안 음극선관의 유리 부분에 가해지는 손상의 위험을 줄인다. 바람직하게 볼트(13)는 상기 볼트(13)의 종 축(31)에 횡 방향으로 가요성을 갖는 탄성 금속 핀(27)을 포함한다. 상기 볼트(13)는 개구부(29)가 있는 중앙 보어(23)와 헤드(25)를 가지는 중공 부분(21)을 포함하며, 상기 중앙 보어(23)는 볼트의 종 축(31)에 대하여 실질적으로 평행하게 연장되며, 상기 금속 핀(27)은 중공 볼트(21)에 포함된다. 상기 금속 핀(27)은 보어(23) 보다 더 긴 길이로 헤드(25)로부터 상기 보어를 통하여 연장된다.
Patent KR-20010040572-A (KR)
Title: 원자주입으로 반도체 기판에 캐버티를 형성하는 방법
IPC: H01L21/762
Filed: 1999-02-01
Abstract: 본 발명은 기판에 조절된 깊이로 캐버티를 형성하기 위해 원자주입으로 기판, 특히 반도체 기판을 처리하는 방법에 관한 것이며, 제1 깊이로 기판에 원자를 주입하여, 상기 제1 깊이에서 제1 원자농도를 얻는 단계, 제1과 다른 제2 깊이로 기판에 원자를 주입하여, 상기 제2 깊이에서 제1보다 낮은 제2 원자농도를 얻는 단계, 기판에 가급적 제1 깊이로 캐버티를 생성하도록 제2 깊이로 주입된 적어도 몇몇의 원자들을  제1 깊이로 이동시킬 수 있는 처리를 실시하는 단계로 이루어지는 것을 특징으로 한다.
Patent KR-20010041023-A (KR)
Title: 분말 흡입기
IPC: A61M13/00
Filed: 1999-03-08
Abstract: 본 발명은 의약품이 캡슐내에 저장되고 중합체-코팅된 강철 핀을 사용하여 캡슐 벽을 천공함으로써 방출되는 단일 투여형 건조 분말 흡입기에 관한 것이다.  중합체-코팅된 천공 수단의 제조 방법 및 캡슐로부터 의약품의 방출에 있어서 이들의 용도를 기술하였다.
Patent KR-20010042550-A (KR)
Title: 세척 브러시 특히 치솔
IPC: A46B9/04
Filed: 1999-04-07
Abstract: 본 발명은 플라스틱 세척 브러시, 특히 손잡이와 확장된 브러시 헤드를 갖는 치솔에 관한 것으로, 상기 브러시 헤드는 손잡이에서 브러시 헤드의 전단부까지 길이방향으로 테이퍼지며 치솔모가 고정되어 있고, 치솔모 면에 주어진 압력 이상으로 가해질 때 치솔모 운반체가 탄성적으로 구부러지는 방법으로 변형될 수 있다. 
     상기 치솔모 운반체가 길이방향으로 연속적으로 배열된 두개의 부분으로 이루어지되, 이음새없이 서로 연결되며, 서로 다른 특성을 갖는 재료로 만들어지되, 적어도 전단부가 엘라스토머로부터 성형되며, 재료, 단면부 및 굽힘 길이의 선택은 전단부가 손잡이 근접부보다 작은 곡률반경으로 변형될 수 있도록 된 것이다.
Patent KR-20010043623-A (KR)
Title: 접착시트와 접착시트 부착 구조물
IPC: C09J7/29
Filed: 1999-04-30
Abstract: 문제점은, 다공질 재료로 구성된 피착체로부터 발생한 가스가 접착시트의 외측으로 나갈 수 있게 하므로 스웰링이 발생하지 않게 되며, 거친 표면에 대해 우수한 접착력을 나타내는 접착시트를 제공하는 것이다.  이러한 문제점을 해결하기 위한 수단은, 필름 기질층과, 상기 층의 표면부에 복수개의 볼록부를 구비하며 또 상기 볼록부들의 사이에는 오목부가 개재하게 되어 외측과 연통하는 연속 채널을 형성하는 채널 브래딩층과, 브래딩 접착층이 순서대로 잇따라 적층되는 접착시트이다.
Patent KR-20010071358-A (KR)
Title: 유연성 회로 조립체
IPC: G06F3/02
Filed: 1999-05-06
Abstract: 완전한 유연성 회로가 개시된다.  일 실시예에서, 유연성 회로는 도전 재료가 피착되어 있는 유연성 기판 층을 포함한다.  유연성 회로는 또한 유연성 기판에 고정 부착되어 도전 재료에 의해 전기적으로 상호 접속되는 다수의 부품을 포함한다.  또한, 유연성 회로는 유연성 기판의 적어도 한 층에 부착되고 다수의 부품 중 적어도 하나에 전기적으로 결합된 유연성 디스플레이 스크린을 포함한다.
Patent KR-20010083049-A (KR)
IPC: C07C7/14
Filed: 1999-06-10
Abstract: C-8+ 방향족 탄화수소 유출물의 연속 통합처리 방법은 정제된 파라-키실렌, 임의의 정제된 오르토-키실렌 생성물을 충분히 분리 및 회수하여 고순도 메타-키실렌 생성물을 회수한다.
Patent KR-20010086295-A (KR)
Title: Construction of diaphragm for air-compressor
Inventor: CHON JOONG HO
IPC: F04B43/02
Filed: 2001-01-04
Abstract: PURPOSE: A diaphragm of an air compressor is provided to reciprocate an air compressor with an electric current fed to a stator and to disperse the fatigue strength applied to a diaphragm of the air compressor by forming a recessed groove and a protrusion on the diaphragm made by natural rubber or synthetic resin. CONSTITUTION: A diaphragms(100) of an air compressor has a fitting hole in the center and a recessed portion(120) on a side as well as a corresponding protruded portion(110) on the other side. At least one protrusion(122) is formed along the central margin of the recessed portion while at least one recessed groove(112) is formed along the central margin of the protruded portion. The fitting hole of the diaphragm is inserted into a protruded connecting member(42a) of a magnet case(42). Then, a second support member(44) is connected by a specific connecting unit. Thereby, the air compressor is mounted on a body(10). Herein, the diaphragm is connected, with one of the protruded portions(110) having the recessed groove, opposed to the other protruded portion. A stator, the air compressor and a side cover are assembled into the body, and the structure is attached to an aquarium or a small purifier. When an electric current is fed to each coil of a first and a second stator, the air compressor generates air by reciprocating between the two stators. The center of the diaphragm is bent by continuous expansion and contraction, and the fatigue strength is raised. The diaphragm has the recessed groove along the central margin to absorb the fatigue strength. The fatigue strength is dispersed by the protrusion at the other central margin.
Patent KR-20010094926-A (KR)
Title: Liquid crystal display device implementing gray scale based on digital data as well as portable telephone and portable digital assistance device provided with the same
Inventor: AGARI MASAFUMI
IPC: G02F1/1368
Filed: 2001-01-22
Abstract: PURPOSE: To provide a liquid crystal display device, enabling high gradation display by digital data, without losing display quality such as display resolution. CONSTITUTION: Each pixel 20, arranged into a matrix form, is divided into plural sub-pixels. Since horizontal scanning lines 60 and vertical scanning lines 70 are arranged corresponding to each row and column of the sub-pixels, with each sub-pixel capable of being controlled on and off independently. Each pixel 20 includes a sub-pixel connecting circuit 25 between sub-pixels. The sub-pixel connecting circuit 25 connects between pixel electrodes of each sub-pixel according to a sub-pixel connection signal inputted from a data line 65, in synchronization with activation of the vertical scanning lines 70.
Patent KR-20020065726-A (KR)
Title: Producing method of water soluble conducting polyaniline and polyaniline composition
Inventor: KIM SUN SIK
IPC: C08G73/02
Filed: 2001-02-07
Abstract: PURPOSE: Provided are a method for producing a water-soluble, conductive polyaniline which can be produced and purified by relatively easy process using emulsion polymerization and density difference and solubility of solvent, and a composition of the polyaniline. CONSTITUTION: The method comprises the steps of (i) polymerizing an emulsion consisting of 2-6 parts by weight of aniline, 5-15 parts by weight of high molecular acid, 1-3 parts by weight of emulsifier, 150-300 parts by weight of water, and 50-200 parts by weight of nonpolar organic solvent in the presence of polymerization initiator to form a polymer, (ii) washing the polymer with organic solvent and phase-separating the polymer to purify the polymer, and (iii) removing a residual organic solvent from the polymer.
Patent KR-20010083191-A (KR)
Title: Magnetic sensor and method of manufacturi ng the same
Inventor: SEYAMA YOSHIHIKO
IPC: G11B5/39
Filed: 2001-02-20
Abstract: PURPOSE: To provide a magnetic sensor for achieving nearly accurate fine CPP structure that can be machined easily and can cope with desired output, while adopting the CPP structure for improving output. CONSTITUTION: A lower terminal layer 1, a magnetism detection film 2, and a cover film 3 are simultaneously subjected to pattern formation to nearly the same size, an opposing surface 1a of the magnetism detection film 2 of the lower terminal layer 1 is nearly superposed to the opposing surface 2a of the magnetism detection film 2 for matching, and a surface 7a that opposes the magnetism detection film 2 in an upper terminal layer 7 is smaller than an opposing surface 2b of the magnetism detection film 2 and moreover is formed into a shape which is included in the opposing surface 2b.
Patent KR-20020068556-A (KR)
Title: The raising seedling mat and the rice raising seedling method on a multistage shelf by using thereof
Inventor: LEE CHEOL WON
IPC: A01G9/10
Filed: 2001-02-21
Abstract: PURPOSE: A method for raising seedling by making an upper mat and a lower mat respectively with vermiculite, zeolite, pearlite, etc., placing the lower mat in a rice seedling raising box, watering, sowing rice seeds, covering the upper mat and then putting on a multistage shelf is provided which permits healthy and uniform seedling raising of rice seeds and increases the availability of a seedling raising space. CONSTITUTION: A mixture of 70 to 90% by weight of one or two selected from vermiculite, zeolite and pearlite and 10 to 30% by weight of one or two selected from ground waste paper or waste newspaper is poured into a mold, hydrated under pressure and dried in a drier to produce an upper mat with a height of 1 to 5mm. A mixture of 50 to 60% by weight of one or two selected from vermiculite, zeolite and pearlite and 20 to 30% by weight of one or two selected from ground coconut coir pith and peat moss and 20 to 30% by weight of one or two selected from ground waste paper or waste newspaper is poured into a mold, hydrated under pressure, added with fertilizer and a plant growth controller and then dried to produce a lower mat with a height of 0.5 to 2.5mm. The lower mat is placed in a rice seedling raising box, sown with rice seeds, covered with the upper mat and then put on a multistage shelf.