baber/WOPTO huggingface dataset:
Patent KR-20010093015-A (KR)
Inventor: KIM YUNG
IPC: H02H3/26
Filed: 2000-03-28
Abstract: PURPOSE: An earth leakage detector is provided to achieve an in-advance prevention against electric leakage, while recording and monitoring the data regarding power input, leakage and ambient temperature in a real-time basis. CONSTITUTION: An earth leakage detector comprises a zero phase sequence current transformer(ZCT)(10) for generating current corresponding to the amount of leakage current; an analog/digital converter(30) for converting the current generated from the ZCT into a digital signal; a digital filter for eliminating the residual noise included in the converted digital signal; a main control unit(40) for judging the occurrence or possibility of electric leakage by comparing the signal having no residual noise with a preset reference value; a leakage control module(100) connected between the digital filter and the main control unit, and which measures and records the converted digital signal and ambient temperature; and an output unit for outputting the result judged by the main control unit. The output unit includes a buzzer(70) for generating alarm sound and a light emitting diode(80) for displaying leakage state when the main control unit judges occurrence or possibility of electric leakage.
Patent KR-20010100279-A (KR)
Inventor: LEE SEOK MIN
Filed: 2000-04-07
Abstract: 본 발명은 무수 말레인산과 같은 반응성 그룹으로 개질된 폴리올레핀계 수지에 폴리올 및 유기화된 몬모릴로나이트를 배합하여 마스터배치를 만들고 이것을 동종의 폴리올레핀계 수지와 혼합하여 삽입형 나노복합재를 제조하는 방법에 관한 것으로서, 이는 폴리올레핀계 수지의 몬모릴로나이트 층간 삽입을 용이하게 하며, 무극성 수지와의 상용성을 향상시킨다.
Patent KR-20000077095-A (KR)
Title: 확산 스펙트럼 수신기
IPC: H04L7/00
Filed: 2000-04-27
Abstract: 기지국으로부터의 무선 신호는 안테나에 의해 수신되고, 무선부에서 증폭, 필터 처리, 주파수 변환, 및 검출되어, 그에 의해 기저대 (baseband) 신호를 구한다.  경로 탐색부는 기저대 신호를 탐색하고, 각 경로에서 피크 (peak) 위치를 검출한다.  검출된 타이밍 관계를 근거로, 각 경로에 대응하는 DLL부내의 코드 발생기는 동작되어, 그에 의해 복조 출력을 구한다.  타이밍 조정부내의 버퍼부는 복조 출력을 인출하여 그 위상을 조정하고, 위상이 조정된 복조 신호는 RAKE 합성 회로에서 더해진다.
Patent KR-20000071844-A (KR)
Title: 사이드라이트형 면광원장치 및 액정표시장치
IPC: G02F1/13357
Filed: 2000-04-28
Abstract: 사이드라이트형 면광원장치 (10) 는, 도광판 (12), 1차광원 (13), 반사시트 (14), 광확산시트 (15), 프리즘시트 (16, 17), 보호시트 (18) 및 이들을 마운트하는 상자형 프레임 (11) 을 구비한다.     프레임 (11) 은, 측판부 (11D) 와, 쐐기를 구성하는 가장자리부 (11A) 및 브리지 (11B) 로 구성된다.     반사시트 (14) 는 부분투광성을 갖는다.     반사시트 (14) 의 외측면에는, 쐐기에 정합하여 조정면적 (14A) 이 형성된다.     조정면적 (14A) 에는, 도트형상, 또는 선형상의 패턴에 따라 페인트가 도포된다.     조정면적 (14A) 은, 도광판 (12) 의 배면 (12C) 으로부터의 누설광의 광로 중에 개재하여, 쐐기의 형상에 대응한 휘도편차가 출사면 (12B) 상에 나타나는 것을 방지한다.     조정면적의 윤곽을 흐리게 하기 위해 윤곽완화영역을 쐐기의 가장자리에 대응하여 형성하여도 된다.     프레임 상에 조정면적을 형성하여도 된다.
Patent KR-20010100384-A (KR)
Inventor: WON CHONG YONG
Filed: 2000-05-01
Abstract: 본 발명은, 정보관리시스템 및 그 방법에 관한 것이다.  본 정보관리방법은, 정보를 보유하고 있는 정보제공자가 자발적으로 또는 외부로부터의 요구에 의해 네트워크상에 정보를 등록하는 단계와; 상기 정보의 가치를 평가하는 단계와; 상기 정보의 가치평가 결과 일정 수준 이상의 가치를 가진다고 판단되면, 상기 정보제공자에게 보상하고 상기 정보의 매매를 허여하는 단계를 포함하는 것을 특징으로 한다.  이에 의해, 정보의 유치를 도모하여 사용자가 최소한의 노력과 시간으로 원하는 정보를 용이하게 획득할 수 있게 된다.
Patent KR-20000049973-A (KR)
Inventor: MUN CHANG YONG
IPC: G06Q50/10
Filed: 2000-05-04
Abstract: PURPOSE: An electronic commerce business model for wedding ceremony contract is proposed to establish a new marketing method among a company support this method, customers, wedding halls and member companies by providing all information about wedding halls and goods using internet and by utilizing e-money(electronic money). CONSTITUTION: An internet home page is firstly constructed and administered to support an electronic commerce business model for wedding ceremony contract. Contracts are made between the internet service company and member customers about wedding halls and goods such as wedding ceremony, field location, honeymoon, furniture, electrical merchandises, and so on. E-money is provided to the customer and by using this e-money, cash is deducted on purchase of goods or contract. All information about domestic wedding halls including public places and the open air, and restaurants, parking and so on are searched.
Patent KR-20010105915-A (KR)
Title: Process for the decontamination of soil containing toxic organic materials and heavy metal
Inventor: CHOI GEUN HO
IPC: B09C1/10
Filed: 2000-05-19
Abstract: A television with multiple display windows (72) and placement dependent cursor (74) and function control is configured to receive and simultaneously display video and graphics input from multiple devices, including but not limited to personal computers (14), video cassette recorders (17), settop boxes (11), video cameras (18) and video disk players (21), as well as display video input signals from cable, antenna and satellite sources. The size of each display window is adjustable to encompass a predetermined amount of the diplay screen of the television (10). Multiple input windows driven by multiple devices can be viewed simultaneously. One or more cursor control and input devices (16) are used to control the operation of the television and of the devices driving the display windows. The cursor control and input devices control the position of the cursor on the television screen. When the cursor is positioned within one of the input display windows, the cursor control and input devices are used to control the operation of the device driving that input window, through signals sent from the television to the appropriate device. Preferably, the devices are coupled to the television through an IEEE 1394 serial bus network.
Patent KR-20010108788-A (KR)
Inventor: HUH JEOM YONG
Filed: 2000-05-31
Abstract: 1. 청구범위에 기재된 발명이 속한 기술분야 
     본 발명은 반도체 제조공정에서의 로트 데이터 손실 자동 교정 시스템 및 그 방법과, 이를 실현시키기 위한 프로그램을 기록한 컴퓨터로 읽을 수 있는 기록매체에 관한 것임. 
     2. 발명이 해결하려고 하는 기술적 과제 
     본 발명은, 다수의 서버로 분산되어 운영되는 반도체 라인관리용 통합자동화 시스템을 이용하여 공정을 진행중에 손실되는 로트의 데이터를 각 서버들간의 메세지 송수신, 데이터 확인 및 갱신작업에 의해 작업자의 개입없이 자동으로 교정할 수 있는 반도체 제조공정에서 로트 데이터 손실 자동 교정 시스템 및 그 방법과, 이를 실현시키기 위한 프로그램을 기록한 컴퓨터로 읽을 수 있는 기록매체를제공하고자 함. 
     3. 발명의 해결방법의 요지 
     본 발명은, 작업자가 작업자 인터페이스 프로세스를 이용하여 로트 데이터 손실 교정 요청을 입력하는 제 1단계; 상기 작업자 인터페이스 프로세스가 로트 데이터 손실 교정 요청을 작업자 인터페이스 서버로 전송하면, 상기 작업자 인터페이스 서버가 작업자 인터페이스 프로세스로부터 로트 데이터 손실 교정 요청을 수신하는 제 2단계; 상기 작업자 인터페이스 서버가 마스터 데이터베이스에서 상기 획득된 로트 데이터 손실 교정 요청을 확인하고, 로트, 카세트 및 공정정보를 갱신하는 제 3단계; 상기 작업자 인터페이스 서버가 상기 제 3단계에서 확인된 로트의 손실 데이터를 셀 관리 서버로 전송하는 제 4단계; 상기 셀 관리 서버가 작업자 인터페이스 서버로부터 로트의 손실 데이터를 수신하여 이력 정보 서버 큐 파일에 기록한 후, 이력 정보 서버 큐 파일에 로트의 손실 데이터를 저장하였다는 메세지를 이력 정보 서버로 전송하는 제 5단계; 및 상기 셀 관리 서버로부터 메세지를 수신한 상기 이력 정보 서버가 상기 이력 정보 서버 큐 파일에서 로트의 손실 데이터를 획득하여 이력 데이터베이스를 갱신하는 제 6단계를 수행한다. 
     4. 발명의 중요한 용도 
     본 발명은 반도체 제조공정에서 로트의 손실된 데이터의 교정방법에 이용됨.
Patent KR-20000054329-A (KR)
Inventor: LEE SEONG HWAN
IPC: H04N5/232
Filed: 2000-06-01
Abstract: PURPOSE: A method for tracking an object on moving picture data is provided to increase the accuracy of the object tracking by adopting pre-memorizing technology on the frames. CONSTITUTION: A method for tracking an object on moving picture data according to the present invention includes following steps. At the first step, a previous frame of the moving picture data is compressed by using current frame of the moving picture data. At the second step, the moving object on the fore screen is processed. At the third step, a motion vector of the object on the fore screen in the reference region of tracking is calculated. At the forth step, a search window size and a relation between the position and a reference search position are analyzed. At the fifth step, a camera operation information is extracted. At the sixth step, the object is tracked by using motion information from the third step, and the operation information of the camera from the fifth step.
Patent KR-20010110879-A (KR)
Inventor: KO SEONG NAM
Filed: 2000-06-09
Abstract: 인터넷 상에서 보다 효율적으로 외국어 학습을 수행하기 위한 회상 채팅 외국어 학습 방법 및 장치가 개시된다. 본 발명은 화상 채팅 서버에 의해 일정의 외국어를 학습하고자 하는 인터넷 사용자와 외국인을 선택적으로 연결시켜 화상 채팅을 통해 대화를 수행함에 의해 외국어를 학습시키고, 학습하고자 하는 외국어를 사용하여 화상 채팅이 수행되는 동안 채팅 주제에 대한 예문 또는 단어 검색 기능을 제공하여 보다 원활한 외국어를 사용한 화상 채팅을 수행하기 위한 네트워크를 통한 외국어 학습 방법 및 장치가 제공된다. 그러므로, 본 발명은 외국어 학습 신청자와 응답자인 외국인이 서로의 영상을 보면서 학습하고자 하는 외국어로 채팅을 수행하므로 보다 높은 학습 효과를 얻을 수 있다.
Patent KR-20010007348-A (KR)
Inventor: MITSUI HIDEAKI
IPC: G03F1/00
Filed: 2000-06-12
Abstract: PURPOSE: A translucent film is provided to obtain a high stability about a high-energy shortwave, satisfactory tolerance about materials used in a mask manufacture process, and reduced defects of films. CONSTITUTION: Half tone phase shift mask green body is produced by forming a translucent film which produces a predetermined extent of phase difference with respect to light passing directly through a translucent substrate and weakens the light intensity on the substrate. The translucent film contains silicon, palladium and one of nitrogen, oxygen or hydrogen.
Patent KR-20020000350-A (KR)
Title: A method for manufacturing phase shift mask of semiconductor device
Inventor: HONG JI SEOK
IPC: G03F1/32
Filed: 2000-06-23
Abstract: PURPOSE: A method for manufacturing a phase shift mask of a semiconductor device is provided to easily control a phase by forming the phase shift mask capable of manufacturing a high-resolution fine pattern. CONSTITUTION: The first chrome layer, a phase shift material layer, the second chrome layer and the third chrome layer are stacked on a crystal substrate(50) having a scribe lane region, a peripheral circuit region and a cell region. The first photoresist layer pattern exposing a portion for a pattern is formed on the third chrome layer. The stacked structure is etched to form a stacked structure pattern of the first chrome layer pattern(51b), a phase shift material layer pattern(52b), the second chrome layer pattern 1 and the third chrome layer pattern 1 by using the first photoresist layer pattern as an etching mask. The second photoresist layer pattern exposing the peripheral circuit region and the cell region as a high transmissivity region and a low transmissivity region is formed. The third chrome layer pattern 1 is etched to form the third chrome layer pattern on the scribe lane region by using the second photoresist layer pattern as an etching mask. The second photoresist layer pattern is removed, and the third photoresist layer pattern exposing the peripheral circuit region as the high transmissivity region is formed. The second chrome layer pattern 1 is etched to form the second chrome layer pattern on the scribe lane region and the cell region by using the third photoresist layer pattern as an etching mask.
Patent KR-20020001123-A (KR)
Title: electronicmat for cooling/heating
Inventor: YUN YONG HYN
IPC: A47C21/04
Filed: 2000-06-26
Abstract: PURPOSE: An electric mat is provided to perform both cooling and heating and to remove the influence of electromagnetic waves. CONSTITUTION: An electric mat comprises a circulation pump for circulating a liquid, a heater for heating the circulation liquid, a thermoelectric element for refrigerating the circulation liquid, a pump drive unit for driving the circulation pump by a first control signal, a power control unit for supplying power to the heater and the thermoelectric element by a second control signal, and a control unit for generating first and second control signals to control the pump drive unit and the power control unit. The electric mat performs cooling and heating by circulating the circulation liquid through a circulation pipe instead of generating electromagnetic waves.
Patent KR-20020002626-A (KR)
Title: Method for forming metal wire of FeRAM
Inventor: YOON YANG HAN
IPC: H01L21/8232
Filed: 2000-06-30
Abstract: PURPOSE: A method for forming a metal interconnection of a ferroelectric memory device is provided to prevent a polarization characteristic of a ferroelectrics from being decreased and to prevent a lifting of a layer caused by a reaction of Pt and Al, by effectively controlling Ti diffused to the inside of the ferroelectrics. CONSTITUTION: The first and second contact holes respectively exposing a Pt upper electrode(39) and a Pt lower electrode(37) of a capacitor are formed. After a tungsten plug(41) is formed in the first and second contact holes, the third contact hole exposing a source or drain junction region is formed. A barrier metal layer including a Ti layer and an Al layer are stacked, and are selectively patterned to form a metal interconnection connecting the capacitor with a transistor and the capacitor with a plate line.
Patent KR-20020004591-A (KR)
Title: An apparatus for sticking label automatically and a method for sticking label
Inventor: LEE SE YONG
IPC: B65C9/14
Filed: 2000-07-06
Abstract: PURPOSE: An automatic label-attaching device and a method thereof are provided to correct a position of a label precisely for preventing a position deviation of the label generated in the procedure of adsorption of the label, thereby attaching the label to an object at a precise position. CONSTITUTION: An automatic label-attaching device includes an air blow unit(10) having a plurality of air-outflow holes(10a) formed with a predetermined interval for preventing a label from being attached to a top surface when the label is released from a vacuum adsorption part(7a) and outflowing air via the air-outflow holes, and a label position correcting part(11) mounted at an upper part of the air blow unit and composed of sliders respectively coupled with pistons of a pneumatic cylinder in every direction.
Patent KR-20020007079-A (KR)
Title: Electronic commerce method, and system for the same
Inventor: KIM JU WON
Filed: 2000-07-15
Abstract: PURPOSE: An EC(Electronic Commerce) method is provided to reduce product cost with reliability by providing different discount rates to clients according to the buying time cycle and the number of products of specific brands. CONSTITUTION: The EC method comprises steps of allocating an ID(Identification) to a customer when the customer buys a product through offline at the first time point(S10, S11), the customer logging in an EC web site with the ID at the second time point(S12), providing a discount rate decided by a time interval between the first and second time points to the customer if the customer requests to buy a product(S14, S15), and admitting the customer to pay the product cost applying the discount rate(S17).
Patent KR-20000063505-A (KR)
Inventor: LEE HO WOUNG
IPC: D02G1/02
Filed: 2000-07-18
Abstract: PURPOSE: A process for preparing a high quality crimped yarn by drawing grey yarn to the highest degree using a drawing apparatus before knitting at a circular knitting machine, knitting and heat setting is provided which produces crimped yarn capable of maintaining crimp for a long period of time and being untied by a little tensile force. CONSTITUTION: A grey yarn(8) in a grey yarn supply apparatus(B) is drawn by receiving heat on a drawing roller(2) after passing through a supply roller(4), knitted at a circular knitting machine and heat set by a heat setting heater(6) in a state in which contraction does not arise between a guide roller(5) and a discharge roller(7) by receiving a tensile force to give high quality crimped yarn.
Patent KR-20020008923-A (KR)
Title: Aspergillus sp. and Process for Preparing Compactin Employing the Same
Inventor: CHOI BYEONG TAEK
IPC: C12N1/20
Filed: 2000-07-21
Abstract: PURPOSE: A novel microorganism Aspergillus sp. and a method for producing compactin using the microorganism are provided, thereby mass-producing the compactin which is useful as a therapeutic agent of hyperlipidemia. CONSTITUTION: The microorganism Aspergillus terreus CCS9-4(KCTC 0829BP) capable of producing compactin is produced by treating Aspergillus terreus CLS216-7(KCTC 0359BP) with a mutagen, in which the compactin is a precursor of pravastatin which is useful as an HMG-CoA reductase inhibitor and a therapeutic agent of hyperlipidemia. The compactin is produced by anaerobically culturing Aspergillus terreus CCS9-4(KCTC 0829BP) in a medium at 20 to 36 deg.C, pH 4.5 to 7.5 for 7 to 15 days; and extracting the cultured medium with organic solvent, in which the organic solvent is acetone or ethyl acetic acid.
Patent KR-20020008981-A (KR)
Title: Manufacture method for beer stone/scale dissolution liquid and beer stone/scale dissolution liquid thereof
Inventor: LEE NAM YEOL
IPC: C09K13/06
Filed: 2000-07-21
Abstract: PURPOSE: Provided is a process for producing a beer stone dissolving agent for removing or preventing effectively beer stone or beer scale generated on the inner surface of a beer container, which is weak alkali and non-hazardous for human bodies. CONSTITUTION: The beer stone dissolving agent for removing the beer stone is produced by mixing 15-40wt% of sodium citrate and 85-60wt% of purified water and then adding optionally sodium gluconate and gluconic acid lactone to the mixture in order to prevent the corrosion of the beer container and the generation of the beer stone.
Patent KR-20010015424-A (KR)
Title: Contact pin, contact pin assembly and socket for electric parts
Inventor: SATO SHUICHI
IPC: G01R31/26
Filed: 2000-07-25
Abstract: PURPOSE: To provide a contact pin of comparatively low cost which is excellent in contact stability with terminals of an IC and in electric characteristic. CONSTITUTION: A contact pin 16 is provided with a base part 27 fixed on a socket for an electric component, a plurality of terminal retaining parts 17 which protrude from the base part 27 so as to correspond to a plurality of terminal 28 of an IC 13 and retain the terminal 28 flexibly, and a plurality of connecting leg parts 31 which protrude from the base part 27 to the opposite direction of the terminal retaining parts 17 and are engaged with an external electric test circuit. In the contact pin 16, the terminal retaining parts 17, the base part 27 and the connecting leg parts 31 are collectively formed in an unified body by using a plate type flexible member. An insulating resin layer is formed on the surface of the flexible member, and a wiring pattern 34 which is composed of conductive material and stretched from tips of the terminal retaining parts 17 to tips of the connecting leg parts 31 is formed on the insulating resin layer.
Patent KR-20020009313-A (KR)
Title: Apparatus and method for processing user traffic in communication system
Inventor: KIM YEONG U
IPC: H04B7/155
Filed: 2000-07-26
Abstract: PURPOSE: An apparatus and method for processing a user traffic of a communication system is provided to continuously offer a service though a fault is generated in one DSP(Digital Signal Processor) in a traffic processing device having a plurality of DSPs. CONSTITUTION: A plurality of slave DSPs(216) are operated as vocoders. A master DSP(215) controls a plurality of slave DSPs(216). A control unit(212) controls an entire operation of a traffic processing apparatus. A shared memory(213) performs an interface between the master DSP(215) and the control unit(212). A plurality of slave DSPs(216) respond to the request signal of the master DSP(215) and transmit a ready signal. A long time error preventing unit outputs a compulsory ready signal to the master DSP(215) when the ready signal is not generated by fault generation.
Patent KR-20010070002-A (KR)
Inventor: KOIKE HIRONOBU
IPC: B01J35/10
Filed: 2000-07-26
Abstract: PURPOSE: Provided are an acid resistant catalyst sheet, and a process for producing same. The acid resistant catalyst sheet is used preferably for, for example, reduction of nitrogen oxides, oxidation of organic substances and decomposition of dioxin. CONSTITUTION: The acid resistant catalyst sheet comprises: a catalyst component-containing titania fiber; a glass fiber; and at least one resin selected from epoxy resins, phenolic resins, melamine resins, furan resins, polyimide resins, silicone resins, fluororesins, polyphenylene sulfide resins and polyether ether ketone resins.
Patent KR-20020009363-A (KR)
Title: Plasma Display Panel Drived With Radio Frequency
Inventor: KIM OE DONG
IPC: H01J11/24
Filed: 2000-07-26
Abstract: PURPOSE: A radio frequency PDP(plasma display panel) is provided to reduce power consumption and increase discharge efficiency. CONSTITUTION: A radio frequency PDP comprises a rear substrate(32) including an address electrode(34) of a stripe and a scan electrode(38) patterned as a waveform to cross the address electrode(34) at relatively lower and upper points, respectively, between adjacent cells, and a front substrate including a radio frequency electrode(48) patterned as a waveform. Video data is applied to the address electrode(34). During an address period, the scan electrode(38) occurs address discharge with the address electrode. A radio frequency signal is applied to the radio frequency electrode(48) during a sustain period. During the sustain period, the scan electrode(38) occurs radio frequency sustain discharge.
Patent KR-20020011696-A (KR)
Title: A power generator device
Inventor: PARK SUN SOON
IPC: F03G7/10
Filed: 2000-08-03
Abstract: PURPOSE: A power generating apparatus is provided to generate power through the rotating unit having a rotor and a stator equipped with a magnet, electric power generating unit and electric power charge unit. CONSTITUTION: An apparatus comprises a rotating device having a single-pole magnet and the other single-pole magnet which is tilted. The rotating device includes an action part and a counteraction part produced by a magnetic field of a permanent magnet, and an action surface where the force of magnetic field of permanent magnet acts. The magnetic rod disposed to be tilted with respect to a parallel magnetic field rotates in a clockwise direction by the magnetic force, and the other magnetic rod disposed to be tilted with respect to a parallel magnetic field rotates in a counterclockwise direction by the magnetic force.
Patent KR-20020013203-A (KR)
Title: Method and system for management of environmental facilities by telemetering system
Inventor: CHOI MYEONG JONG
Filed: 2000-08-11
Abstract: PURPOSE: A method and system for remotely managing an environment institution is provided to store and manage data of the environment information, inquire the data, and alarm. CONSTITUTION: A TMS(Tele Metering System) station(320) creates an alarm message in accordance with a pollution state information value being inputted from a TMS and transmits the alarm message to a TMS server(340). The TMS server(340) embodies ID information of a TMS manager to the alarm message being inputted from the TMS station(320) and stores the ID information embodied alarm message in a data server(330) and inputs the alarm message and the ID information to an ARS server(350). The ARS server(350) generates a predetermined formed alarm by the inputted alarm message and the ID information, and stores contents with respect to transmission or not of the generated message.
Patent KR-20020015169-A (KR)
Title: New titanium oxide phthalocyanine polymorph, producing method thereof and method for producing organic photoconducting drum using thereof
Inventor: KWON JANG HYEON
IPC: C09B47/08
Filed: 2000-08-21
Abstract: PURPOSE: Titanium oxide phthalocyanine of novel crystal form, its preparation method and a method for preparing an electrophotographic organic photoreceptor drum using the titanium oxide phthalocyanine are provided, to improve the photo sensitivity and dark attenuation of an organic photoreceptor drum. CONSTITUTION: The titanium oxide phthalocyanine has peaks at 9.3, 10.5, 12.4, 13.1, 15.1, 15.6, 16.0, 20.7, 23.3, 26.2, 26.8 and 27.1 deg in 2θ at XRD. The titanium oxide phthalocyanine is prepared by dissolving A-type titanium oxide phthalocyanine in an alcohol or glycol, and placing it for 10-150 hours by the crystal form conversion. An electrophotographic organic photoreceptor drum comprising a charge generation layer and a charge transfer layer is prepared by using the titanium oxide phthalocyanine as a charge generation material. Preferably a mixture of the titanium oxide phthalocyanine and at least one compound selected from the group consisting of A-type titanium oxide phthalocyanine, D-type titanium oxide phthalocyanine, B-type titanium oxide phthalocyanine, noncrystalline titanium oxide phthalocyanine, titanium oxide phthalocyanine derivatives containing one or more kinds of substituents, vanadium oxide phthalocyanine, phthalocyanine containing no metal, and phthalocyanine containing no metal and one or more kinds of substituents, by the ratio of 1/1 to 1/0.01, is used as charge generation material.