baber/WOPTO huggingface dataset:
Patent KR-20000013263-A (KR)
Title: Water quality improvement method of river by river bed filtration
Inventor: KIM SEUNG HYUN
IPC: E02B1/00
Filed: 1998-08-06
Abstract: PURPOSE: The improvement method of water quality of the river which is environment affinitive, not generating a sludge to be medicated or processed additionally without extra area is provided. CONSTITUTION: The improvement method of water quality of the river has the steps of: establishing a water collection tank on a river bed; discharging to the river by pumping water the water collected as horizontally establishing a water collection pipe on the floor of the water collection tank; making the water collection pipe as a radial shape to increase the capacity of a river bed for filtering, absorbing, biological analyzing; spraying the water like a fountain to the air when discharging the double current water pumped to increase the concentration of dissolved oxygen of the river.
Patent KR-20000014064-A (KR)
Title: Device for sensing wrong-connected line of multi air conditioner and sensing method thereof
Inventor: SIM MIN SUP
IPC: F24F5/00
Filed: 1998-08-17
Abstract: PURPOSE: A device for sensing the wrong-connecting line of a multi-air conditioner is provided to sense the wrong-connected line of a multi-air conditioner by replacing the common line of a signal line and a common line which form a communication line between an indoor device and an outdoor device with the refrigerant pipe. CONSTITUTION: The device for sensing the wrong-connecting line of a multi-air conditioner includes:a microcomputer(110) controlling the action of the indoor device and operating the wrong-connected line by performing the subroutine of a trial run; a transmitting/receiving unit(120) for transmitting and receiving the information with an outdoor device through a communication signal transfer unit(130) of the rear end by the control of the microcomputer; the communication signal transfer unit consisting of an earth-in common line for sharing a signal line transferring a signal and power; a transmitting/receiving unit(140) for transmitting and receiving the information with the indoor device through the communication signal transfer unit; a microcomputer(150) controlling the whole outdoor device including the transmitting/receiving unit of the outdoor device; and a wrong-connected line indicating unit(160) indicating the normal or the wrong-connected line according to the operated consequences of the microcomputer of the indoor device.
Patent KR-20000014881-A (KR)
Title: Method for fabricating semiconductor device
Inventor: MIN BYOUNG HO
IPC: H01L21/31
Filed: 1998-08-25
Abstract: PURPOSE: The method improves the productivity according to the fabrication of a semiconductor device by taking an appropriate measure when an inferiority occurs in forming a BPSG film. CONSTITUTION: The method is to form a BPSG film used as an interlayer insulation film. The method is to form an oxide film and a BPSG film in sequence on a semiconductor substrate where a pattern including a gate structure is already formed. In case that an inferiority occurs in forming the BPSG film, after removing the inferior source and BPSG film using HF solution weakened in a deionized water by 90:1 or 100:1, then a BPSG is formed again on the oxide film revealed by the removal of the BPSG film.
Patent KR-19990029594-A (KR)
Title: 이온주입기용 전자 샤우어 및 그 타겟/튜브 조립체를 교체하는 방법
IPC: H01J37/02
Filed: 1998-09-07
Abstract: 이온주입 시스템(10)용 플라즈마 개선 전자 샤우어(62)는 대체가능한 흑연 내부 라이너(88)를 갖는 확장튜브(66)를 포함하여 제공된다. 상기 내부 라이너는 낮은 음의 전위(-6V)로 바이어스되어, 상기 전자 샤우어 타겟에 의해 발생된 낮은 에너지를 갖는 2차전자가 웨이퍼 전하 중성화에 계속적으로 이용할 수 있는, 상기 웨이퍼에서 떨어져 분로 되는 것을 막는다. 상기 전기적으로 바이어스된 내부표면은 웨이퍼에 직면하는 표면(128) 및 타겟에 직면하는 표면(130)을 교호하여 톱니모양으로 제공된다. 상기 전자 샤우어(62)의 동작동안, 상기 웨이퍼로부터 백 스퍼터링될 수 있는 포토레지스트 또는 다른 재료는 비전도성이 되는 웨이퍼에 직면한 표면(128)상에 수집되는 반면, 상기 타겟에 직면한 표면(130)은 세정되어 전도성이 된다. 상기 전도성 타겟에 직면한 표면은 상기 전자 샤우어에서 발생된 고 에너지 전자를 전기적으로 접지시키기 위해서 분로경로(저 저항)를 제공한다.
Patent KR-20000019030-A (KR)
Title: Non volatile memory device and manufacturing method thereof
Inventor: YU JONG WON
IPC: H01L27/115
Filed: 1998-09-08
Abstract: PURPOSE: A manufacturing method of an NVM(Non Volatile Memory) device is provided to decrease a memory cell size and secure high program efficiency without an additional process. CONSTITUTION: A manufacturing method of an NVM(Non Volatile Memory) device comprises the steps of: forming a floating gate on a gate insulation layer on a semiconductor substrate having a first conductivity; forming an interlayer dielectric layer on the floating gate; forming a control gate on the interlayer insulation layer; forming a source within the substrate under one end of the floating gate, a predetermined portion of the source being overlapped with the floating gate; forming a drain within the substrate under the other end of the floating gate, a predetermined portion of the drain being overlapped with the floating gate; and forming a first conductive impurity doping region having higher impurity density than the substrate in a region between the source and the substrate, a region between the drain and the substrate, the a channel region.
Patent KR-19980087794-A (KR)
Title: 공중살포 가능한 표면피복 종자
Filed: 1998-09-18
Abstract: 본 발명에서는 공중살포 가능한 표면피복 종자에 대해 공개한다. 본 발명에 따른 표면피복 종자는 지렁이 분변토, 우분 및 마분 등으로 구성된 유기물과 황토에서 선택된 1종 이상에 카르복시메틸셀룰로오스 등의 친수성 접착제가 물에 약 1/50%∼1/300%로 희석된 수용액을 혼합하여 식물 종자의 표면에 해당 종자의 2∼5배 두께로 피복한 데에 특징이 있는 것으로, 이는 식물종자를 노지에 바로 뿌려도 각종 조류 등에 의한 피해가 거의 없을 뿐 아니라 그 상태에서 바로 자체 발아될 수 있도록 함으로써 광활한 면적에 종자를 공중 살포하는데 매우 유용하다.
Patent KR-20000021952-A (KR)
Title: Hydraulic system for traveling device of heavy equipment vehicle
Inventor: GU BON SEOK
IPC: F15B11/22
Filed: 1998-09-30
Abstract: PURPOSE: A hydraulic system is provided to overcome the limit in increasing the traveling capability by selectively feeding the sufficient hydraulic power for driving another actuator able to add traveling power. CONSTITUTION: A hydraulic system is operated by: returning the venting flow of another main pump(5) to an oil tank through neutral channels of switching valves if a confluent switching valve is neutral; flowing the venting flow of a main pump to a right traveling valve(12) and the venting flow of the other main pump(5) to a left traveling valve(10) if both traveling valves(10,12) are switched by pilot pressure so both left and right traveling motors(22,24) as to be driven at the same speed; generating pressure to a first pilot path(a) as a second pilot path(b) is interrupted; switching a supplementary valve(20) according to the pressure; and flowing the hydraulic power through the supplementary valve to a third pilot path. Therefore, the confluent switching valve is switched and the hydraulic pressure is flowed to the switching valve through a first and a second path(d,e) to feed the hydraulic pressure for raising the traveling speed.
Patent KR-20000025844-A (KR)
Title: Fermented fertilizer for agriculture and manufacturing method thereof using milk
Inventor: LEE SUNG WOOK
IPC: C05F3/00
Filed: 1998-10-13
Abstract: PURPOSE: The fermented fertilizer for agriculture and a manufacturing method thereof using milk are provided which facilitates the lysis of amino acids, rhizosphere microorganisms, and organic compounds, activates the soil and the crop, inhibits the activity of the harmful microorganism, and produces the anti-bacterial and(or) anti-viral materials using Lactobacillus and photosynthetic bacteria of the milk. CONSTITUTION: The fermented fertilizer for agriculture is produced by mixing the milk, Lactobacillus, photosynthetic bacteria, borate, manganese sulfate, zinc sulfate, copper sulfate, sodium molybdate, and cobalt and, and fermenting them. The fermented fertilizer comprises 22-25 wt.% of amino acids, 27-30 wt.% of fat, 35-39 wt.% of sugar, 6-7 wt.% of lime powder, 0.6-0.9 wt.% of calcium, 0.6-0.8 wt.% of phosphate, 0.07-0.09 wt.% of iron, 0.01-0.03 wt.% of vitamins, 0.6-0.8 wt.% of borate, 0.6-0.8 wt.% of manganese sulfate, 0.03-0.05 wt.% of zinc, 0.008-0.015 wt.% of copper, 0.0038-0.0042 wt.% of sodium, 0.0038-0.0042 wt.% of cobalt, and more than 1 billion per 1 cc of Lactobacillus and photosynthetic bacteria.
Patent KR-20000027131-A (KR)
Title: Apparatus for measuring pollution level of developing solution of printer and method thereof
Inventor: EUM YOON SEOP
IPC: G01N21/47
Filed: 1998-10-27
Abstract: PURPOSE: An apparatus for measuring pollution level of developing solution of printer is provided to prevent a degradation of a printing quality by accurately computing a pollution level and performing a suitable treatment when the computed pollution level is over a permissible pollution level. CONSTITUTION: A developing solution bleed tube portion(40) is installed on a developing solution providing tube connected from a developing solution providing chamber(32) to a developing cistern(31). The developing solution bleed tube portion(40) has a first tube portion(41) and a second tube portion(42). A valve(43) exhausts a developing solution held in the developing cistern(31) to the developing solution providing chamber(32). A first gap(t1) of the first tube portion(41) and a second gap(t2) of the second tube portion(42) are formed for relatively having a difference. The developing solution bleed tube portion(40) is installed in the developing cistern(31) or the developing solution providing chamber(32). An optical detecting unit(70) has a first optical detector(71) for detecting a light which penetrates the first tube portion(41) and outputting a signal corresponding to the detected light. The optical detecting unit(70) has a second optical detector(72) for detecting a light which penetrates the second tube portion(42) and outputting a signal corresponding to the detected light.
Patent KR-20000027648-A (KR)
Title: Circuit for protecting electrostatic
Inventor: HWANG JUNG YEOL
IPC: H01L27/04
Filed: 1998-10-28
Abstract: PURPOSE: An ESD(electrostatic discharge) protection circuit is provided to prevent a damage due to over-current generated at edge of drain by increasing area of edge portion of drain. CONSTITUTION: An isolation oxide(12) and a gate oxide(14) are sequentially formed on a semiconductor substrate(10). A trench(20) is formed by etching the exposed substrate(10) of an active region defined by the isolation oxide(12). By ion-implanting to the trench(20), a heavily doped implanted region(16) is formed, and then a doped polysilicon layer(18) is deposited at inner walls of the trench(20). Since source and drain regions are formed by trench(20) and deposited polysilicon layer(18), the area of drain edge is increased.
Patent KR-20000028228-A (KR)
Title: Method for controlling reservation record of tvcr
Inventor: SONG BOK CHEON
IPC: G11B15/02
Filed: 1998-10-30
Abstract: PURPOSE: A method for controlling reservation record of TVCR is provided to see and hear a broadcasting program according to a sequency set by a user by performing a video tape as a forward fast(FF) mode by an interval of a prior program time when the prior program is recorded in the video tape. CONSTITUTION: A timer identifies as to whether a reservation record key is inputted and controls an OSD processing unit to display a set menu picture of a reservation record on a CRT unit(S100,S101). The timer identifies as to whether a record channel, a record date, a start/end time, and a record velocity of a plurality of broadcasting programs are set by a user. The timer controls a deck unit to record the set broadcasting program as a result of the identification(S103). The timer identifies as to whether a broadcasting program is prior to a next recording broadcasting program when the start time of a reservation record of the next broadcasting program is reached(S104,S105). The timer checks set information of the reservation record when the broadcasting program is prior to the next recording broadcasting program and detects the start/end time of the prior set broadcasting program(S106). A system controller controls the deck unit to perform a forward fast(FF) mode by a time of the prior set broadcasting program(S107).
Patent KR-20000031468-A (KR)
Title: Motor assembly with inverter
Inventor: NA SEUNG HO
IPC: H02P13/00
Filed: 1998-11-06
Abstract: PURPOSE: A motor assembly with an inverter is developed to prevent components from being damaged by lowering leakage current and neutral voltage to a level of an allowable value. CONSTITUTION: A motor assembly includes an inverter(50) for converting DC voltage(Vdc) into 3-phase AC voltage using a switching element. The 3-phase AC voltage is input to a chock(51) to compensate a magnetic flux generated on each phase, then further input to a motor(52) to drive the same. A grounded resistor(R) is connected to a neutral point of the motor(52). A value of the resistor(R) is identical to that of an impedance of the motor(52) and prevent the voltage of the neutral point from being increased to an allowable level.
Patent KR-20000031562-A (KR)
Title: Detector of synchronous signal in digital television
Inventor: GU YEONG MO
IPC: H04N7/015
Filed: 1998-11-07
Abstract: PURPOSE: A signal detector is provided to easily detect the polarity of data and odd/even field synchronous signal from a digital VSB signal and to easily recover the data by stabilizing the synchronization of a receiving system in an inferior channel. CONSTITUTION: A synchronous signal detector of a digital TV is composed of a DC remover(100) for removing DC from a received VSB signal, a synchronous signal detector(200), and a polarity interpolation unit(300). The synchronous signal detector generates various synchronous signals by using a correlation between the VSB signal without DC and a vertical synchronous signal. The polarity interpolation unit calibrates the polarity of the VSB signal without DC by using the polarity detected from the synchronous signal detector. Therefore, a vertical synchronous signal with a high reliability is detected by the synchronous signal detector from the digital VSB signal using the correlation between the digital VSB signal and the vertical synchronous signal. Then, a horizontal synchronous signal is detected to a relative position from the vertical synchronous signal detected without an additional horizontal synchronous signal detector.
Patent KR-19990045368-A (KR)
Title: 휴대용 안마기
IPC: A61H23/02
Filed: 1998-11-18
Abstract: 파지형 안마기는 환자의 기관지 분비물을 완화 및 유동시켜 혈액 순환을 향상시키고 근육을 이완시키기 위한 치료용으로 사용된다.  안마기는 진동 헤드 어셈블리에 직접 접속된 회전 출력 샤프트를 갖는 무진동 모터를 포함한다.  출력 샤프트의 회전 운동은 평형 편심기의 일부로서 일체 형성된 오프셋 캠을 통해 진동 헤드 어셈블리의 어댑터부의 샤프트 중앙선을 중심으로 하는 발진 궤도 운동으로 변환된다.  편심기 내의 균형추는 사용자의 손에 전달되는 진동을 감소시키고, 진동 헤드 어셈블리의 발진 진동을 차단한다.  진동 헤드 어셈블리의 바람직하지 않은 회전은 발진 어댑터 부품과 모터부에 고정된 진동 헤드 어셈블리의 고정자부와의 사이의 장착 구조에 의해 방지된다.
Patent KR-19990014608-A (KR)
Title: 가설 흙막이 구조물을 이용한 합성 지하옹벽 설계방법 및 건축물 지하 옹벽 공사방법
IPC: E02D29/02
Filed: 1998-11-26
Abstract: 본 발명은 건축물의 지하 구조물을 설치하기 위한 지하 터파기 공사 때 임시 시설물로써 설치한 흙막이 벽을 건축 지하 옹벽의 일부로 활용하여 경제적으로 건축물 지하 부분의 옹벽을 구축하는 방법에 관한 것이다. 
     가설 흙막이 벽은 현장 상황에 따라 현장 타설 콘크리트 말뚝, 소일 시멘트 월, 강재 시트 파일 등 다양하게 채택되며 이런 다양한 종류의 가설 흙막이 벽이 가진 구조성능을 활용한다. 
     그리고 본 발명은 터파기를 위한 가시설로 소일 네일링(soil nailing)공법으로 자연 및 인공사면을 보강한 경우 소일 네일링 처리한 가시설의 구조적 성능을 활용하여 구조체 옹벽의 두께를 줄일 수 있는 방법도 포함한다. 
     또한 본 발명은 가설 흙막이 벽의 구조 성능을 합성하여 건축옹벽을 구축하고, 합성된 건축옹벽의 전단마찰력을 강화시켜 구조체가 지하수위에 의한 부력을 부담할 수 있는 방법도 제공한다. 
     본 발명으로 건축물의 지하 구조물용 터파기를 위하여 임시로 설치하는 가설을 영구 시설물의 일부로 활용하는 방법을 제공하여 한번 사용하고 철거하거나 매립하여야 가설 흙막이 시설을 영구 구조물의 일부로 활용함으로서 한정된 자원을 효율적으로 사용하고 공사비를 절감할 수 있게 되었다.
Patent KR-20000042519-A (KR)
Title: Method for producing wire rod for spring steel of high stress
Inventor: CHOI HAE CHANG
IPC: C21D8/06
Filed: 1998-12-26
Abstract: PURPOSE: A producing method is provided to control surface decarbonated layer of steel for a spring by controlling heating condition when heating for rolling a wire rod of steel added with solid silicon. CONSTITUTION: A steel billet contains from 0.4 to 0.6 wt% of carbon, from 2.8 to 4.0 wt% of silicon, from 0.1 to 0.3 wt% of manganese, from 0.3 to 0.6 wt% of chrome, less than 0.0015 wt% of oxygen, from 0.005 to 0.01 wt% of nitrogen, less than 0.01 wt% of phosphor, less than 0.01 wt% of sulphur, one or two sorts selected among the elements from 0.01 to 0.1 wt% of vanadium, from 0.01 to 0.1 wt% of niobium and from 0.1 to 0.3 wt% of nickel, remnant iron and impurities. The steel billet is heated at a speed of 14.5 to 15.5°C/min to Ac1, at a speed of 3 to 9°C/min from Ac1 to Ace which is an ideal range, at a speed of 5 to 15°C/min from 1000 to 1100°C and maintained for 30 to 60 minutes. A wire rod is acquired by rolling a wire rod in a diameter less than 16mm.
Patent KR-20000044620-A (KR)
Title: Address recognition device
Inventor: KIM JIN WAN
IPC: G06F9/00
Filed: 1998-12-30
Abstract: PURPOSE: An address recognition device is provided to make the applicable process only participate in the communication without stopping the current process for recognizing the address. CONSTITUTION: An address recognition device shifts a first signal input in series by being synchronized in a first clock signal. The shifted result and the previously set address is compared to find whether they are same or not. And the device compares the uppermost bit arrays of the shifting results of a first comparison part and the appointed bits to fine whether they are same or not. If they are same, a second comparison part outputs the comparison signal. If the comparison signal is output, the signal generating part generates the address recognition signal according to whether the first and the second comparison part is opened or not.
Patent KR-20010016641-A (KR)
Title: Organic diffused reflection preventive polymer and process for producing same
Inventor: BAEK GI HO
IPC: C09D5/00
Filed: 1998-12-30
Abstract: PURPOSE: A new compound capable of being used for a reflection preventing film in the process for forming a fine pattern using 193nm ArF and 248nm KrK light in a process for producing a semiconductor and process for the preparation thereof are provided which can form a stable ultrafine pattern of 64M, 256M, 1G, 4G and 16G DRAM by removing the CD change and increase the yield. CONSTITUTION: A polymer of formula 1 used for an organic reflection preventing film is prepared by polymerization of a methylacrylate monomer (I), a hydroxyethylacrylate monomer and a styrene monomer with an initiator in a solvent. In formula, R1 represents H, C1-4 alkyl, hydroxy or hydroxymethyl; R2 represents H, C1-4 alkyl, hydroxy or hydroxymethyl; R3 represents H, C1-4 alkyl, hydroxy, C1-3 hydroxyalkyl, methoxy, formylethyl or formylethoxy; l, m and n represent a molar ratio of l : m : n of 0.1 to 0.9 : 0.1 to 0.9 : 0.1 to 0.9.
Patent KR-19990028765-A (KR)
Title: 항종양 활성을 지닌 신규한 피리도-티오피라노인다졸
IPC: A61K31/4353
Filed: 1996-07-03
Abstract: 본 발명은 항종양 활성을 나타내는 일반식 (I)의 화합물에 관한 것이다. 
       (I) 
     식 중에서, X, Y, Z 또는 T중의 하나는 질소(N)이고 나머지는 CH-이다.
Patent KR-19990087443-A (KR)
Title: 제거 가능한 인쇄물을 용기에 적용하는 방법
IPC: B44C1/165
Filed: 1997-02-27
Abstract: 플라스틱 크레이트 등의 용기에 제거 가능한 인쇄물을 적용하기 위해, 인쇄물을 형성하고 잉크층을 용기에 결합시키기 위한 결합제가 한쪽 면에 제공된 잉크층은, 결합제가 제공되지 않은 면에 적용되어 있는 매개 필름으로부터 용기로 전사된다.  상기 결합제는, 용기를 정상 조건에서 사용하는 경우에는 상기 잉크층이 상기 용기에 견고하게 접촉하도록 하고, 정상 조건과는 다른  미리 결정된 조건에서 사용하는 경우에는 상기 결합제와 상기 잉크층이 상기 용기로부터 제거하기 쉬운 것과 같은 특성을 갖는다.  이러한 방법으로 다른 인쇄물로 교체하기가 쉬운 고품질의 인쇄물을 갖는 용기를 생성할 수 있다.
Patent KR-19990087564-A (KR)
Title: 컴퓨터 그래픽 디스플레이 장치에서 화소값 및 알파값의 보간
IPC: G06T3/40
Filed: 1997-03-05
Abstract: 화소 반복(404) 및 평균(412) 기술을 사용하여 매우 높은 해상도 화상(414)으로 낮거나 중간 해상도 화상(413)을 보간하기 위하여 장치가 제공된다.  제1 디스플레이 해상도의 화소를 갖는 오버레이 화상과 혼합의 정도를 표시하는 값(413)과 배경 화상을 혼합하는 다수의 알파가 배경 화상(414)의 해상도로 보간된다.  보간 화소값에 추가하여, 알파 혼합값은 배경 화상과 혼합되기 이전에 대응하는 오버레이 화소값들에 의해 보간되고 승산된다.
Patent KR-20000010539-A (KR)
Title: Optical method and device for determining blood glucose level
Inventor: CASTANO JAIME A
IPC: A61B5/145
Filed: 1997-04-18
Abstract: PURPOSE: Is provided which has a hand held and economic optical device having weight of less than 0.5Kg and simple method for determining on glucose level in blood. CONSTITUTION: Blood glucose level is measured by an optical device(1) with the following steps; giving a changeable light pattern(9) according to parameters ruled by luminance, color, flicker rates, contrast and speed, followed by changing a stimulating ratio of a first(M-retina system) to a second(P-retina system) being 1 or higher:observing self-awakening visual effect which shows a balanced stimulating point of two systems; operating button(4 or 5) with a correct data related visual effect to blood glucose level; displaying(6) glucose level in blood
Patent KR-20000010804-A (KR)
Title: Circuit arrangement for generating random bit sequences
Inventor: VIEHMANN HANS-HEINRICH
IPC: H03B29/00
Filed: 1997-04-25
Abstract: PURPOSE: A circuit arrangement is provided for generating random bit sequences in a digital circuit. CONSTITUTION: A first oscillator(OSZ1) and a second oscillator(VCO1) whose outputs are connected to the inputs of a phase detector(PD) that generates the random bit sequence are comprised. The former generates a constant frequency. The latter is frequency modulated. The quantization noise dominates with a sufficient frequency departure. So a coincidental bit sequences are developed.
Patent KR-20000010957-A (KR)
Title: Mpeg decoder providing multiple standard output signals
Inventor: NAIMPALLY SAIPRASAD
IPC: H04N19/103
Filed: 1998-03-11
Abstract: PURPOSE: A decoder is provided to convert and format an encoded high resolution video signal to a decoded lower resolution output video signal such as MPEG-2 encoded video signals. CONSTITUTION: A digital video signal processing system includes a digital video decoder which can be controlled to decode the encoded video signal and provide a reduced resolution version of the decoded video signal. The system processes the received encoded video signal to determine the format and resolution of the image which would be produced if the signal were decoded. A controller receives the determined format and resolution information and which also receives information concerning the format and resolution of a display device on which the received image will be displayed. The controller then generates signals to cause the digital video decoder to provide an analog video signal having a resolution and aspect ratio that is appropriate for the display device.
Patent KR-20000016055-A (KR)
Title: Method for disentangling hollow carbon microfibers, electrically conductive transparent carbon microfibers aggregation film and coating composition for forming such film
Inventor: SHIBUTA DAISUKE
IPC: C09D5/24
Filed: 1997-05-28
Abstract: PURPOSE: Disclosed is a method for disentangling hollow carbon micro fibers and to the dispersion of hollow carbon micro fibers, having an outer diameter of 3.5 to 70 nm and an aspect ratio of at least 5, to form transparent electrically conductive carbon film. CONSTITUTION: Hollow carbon micro fibers, treated with a strong acid such as sulfuric acid or oleum and an oxidizing agent such as nitric acid, are disentangled and dispersed homogeneously in a polar solvent. The obtained slurry in which micro fibers are suspended can be coated on a substrate. The coating film is dried and a transparent electrically conductive film is formed. Because hollow carbon micro fibers have self-cohesiveness characteristics and a film comprising the micro fibers can be formed without a binder, a carbon micro fiber aggregation film with excellent transparency can be obtained having a total transmittance of at least 80 % and haze value of at most 0.1 %. Further, this invention relates to an electrically conductive transparent film comprising a binder to improve the strength of the film.