baber/WOPTO huggingface dataset:
Patent KR-20010014722-A (KR)
Inventor: FURUYA SHIGEKI
IPC: G01R19/165
Filed: 2000-04-12
Abstract: PURPOSE: A voltage detecting circuit is provided to reduce power consumption without decreasing detection precision and to enhance a life-time of power source. CONSTITUTION: The voltage detecting circuit for detecting a state of a first voltage includes a detection voltage generating circuit(110) for generating a detection voltage depending on the first voltage, a reference voltage generating circuit(120) for generating a reference voltage, a comparison circuit(130) for comparing the detection voltage with the reference voltage and outputting a result of the comparison as a detection signal, and a control circuit for controlling at least one of the detection voltage generating circuit(110), the reference voltage generating circuit(120), and the comparison circuit(130) so that at least one of these circuits operates intermittently.
Patent KR-20000037361-A (KR)
Inventor: PARK GI JU
IPC: H02B7/06
Filed: 2000-04-19
Abstract: PURPOSE: A substation is provided to facilitate the checking and repairing of the substation by installing checkable doors. CONSTITUTION: A case(C) has a low voltage portion(A) and a high voltage portion(B). A pair of front low voltage control doors are installed such that ends of them are engaged with hinges and are opened towards the front. A main cutting device is disposed on one side of a horizontal partition installed between the doors. A window is installed on one side of the doors, and the main cutting device is seen by naked eyes through the window(221). A pair of front low voltage outer doors(31,32) has a controlling means and windows(311,321). A high voltage transformer and an instrument transformer are installed at the lower portion of the high voltage portion(B). The substation further comprises a fuse, a checking space, a pair of rear high voltage doors, windows(611,612), and a checking doors(621,622).
Patent KR-20010102679-A (KR)
Inventor: CHO SEUNG JAE
Filed: 2000-05-04
Abstract: 본 발명은 조립식 건강 훌라후프에 관한 것으로, 통상적으로 사용되는 종래의 훌라후프는, 허리를 유연하게 하는 운동 효과 이상은 기대할 수 없는,그저 단순한 허리 회전 운동용구에 불과하였다. 
     또한, 종래의 훌라후프중 여러마디로 분리구성 된 조립식 훌라후프의 경우는 휴대,보관시 부피를 줄여 휴대,보관함으로 편리한 잇점이 있는 반면, 휴대 또는 보관시 각각의 훌라후프 마디를 분실하기 쉽고, 또 종래 훌라후프 구성이 단순한 원형링으로 형성된 합성수지 관체이거나 또는 상기 합성수지관체 내측부에 지압돌기를 사출성형하여 조립구성한 것이므로 오래 사용하지 않더라도 쉽게 식상하게 된다. 
     이에 본 발명은, 조립식으로 훌라후프를 형성하되, 훌라후프의 각마디 내측에 옥, 게르마늄, 세라믹, 자석 등등과 같은 건강물질로 된 지압돌기를 인써트몰딩함과 동시에 적정 위치에 발광적외선 램프를 설치하여, 허리,배, 옆구리등의 지압효과및 시각적 효과(호기심)를 극대화 시키고, 마디 각각에는 음악이 메모리된 칩과 스피커로 구성된 음악장치, 회전수를 첵킹하여 운동량을 규제및 확인 할수 있는 계수장치, 허리외에 목이나 팔, 다리등을 맛사지 할수 있도록한 진동장치 등으로 구성하여 다목적 운동이 가능하게 하며, 더불어 각각의 마디가 분해,조립은 물론, 분실의 염려가 없도록 탄성줄로 궤어 휴대,보관, 사용이 편리하면서 분실의 염려가 전혀 없도록 한 조립식 건강 훌라후프를 제공하는 것이다.
Patent KR-20010103474-A (KR)
Inventor: SIM UN SEONG
Filed: 2000-05-10
Abstract: 본 발명은, 사각판면을 가진 4방향 플랫 패키지의 4방향을 따라 배치되며 4방향 플랫 패키지의 거의 대각선 방향을 따른 땜납도포 방향에 대해 전방 및 후방에 위치하는 각각 한 쌍의 전방랜드군과 후방랜드군을 갖는 4방향 플랫 패키지 IC 실장용 인쇄회로기판에 있어서, 상기 전방랜드군과 후방랜드군이 만나는 모서리 영역에 판면으로부터 적어도 부분적으로 함몰 형성된 땜납유도부를 포함하는 것을 특징으로 한다. 이에 의하여, 4방향 플랫 패키지 IC의 전방랜드군과 후방랜드군 사이에서의 쇼트나 브릿지를 방지할 수 있게 된다.
Patent KR-20010105571-A (KR)
Title: Leveller system
Inventor: KIM MAENG SIK
IPC: C10B41/00
Filed: 2000-05-16
Abstract: A converter steel refining method capable of blowing a molten steel having a low peroxidation degree at high productivity and high yield. Firstly, the pressure converter steel making method comprises setting a pressure (P) inside a furnace to a pressure higher than the atmospheric pressure inside a top bottom blowing converter, and regulating a top blowing oxygen feed velocity (F) and a bottom blowing gas flow rate (Q) in accordance with the change of the pressure (P) inside the furnace. Secondly, the pressure converter steel making method comprises setting a pressure (P) inside a furnace to a pressure higher than the atmospheric pressure for the entire period, or a part, of the blowing period in a top bottom blowing converter, and regulating a top blowing oxygen feed velocity (F) and a bottom blowing gas flow rate (Q), and the pressure (P) inside the furnace, in accordance with a carbon concentration (C) in a steel bath.
Patent KR-20010106964-A (KR)
Title: 플라즈마 디스플레이 패널소자의 칼라필터 형성방법
Inventor: AHN BU HWAN
IPC: H01J9/02
Filed: 2000-05-24
Abstract: 본 발명은 플라즈마 디스플레이 패널소자의 칼라필터 형성방법에 관한 것으로, 종래 스크린 인쇄법의 경우 인쇄 두께가 5㎛ 정도로 두꺼워 R,G,B 가시광의 투과율을 저하시키고, 두께 및 폭 균일도가 나쁘기 때문에 고정세 플라즈마 디스플레이 패널에 적합하지 않은 문제점이 있으며, 감광성 페이스트법의 경우 R,G,B 색상에 대한 각각의 필름 매립, 노광 및 현상이 이루어짐에 따라 제조공정이 복잡함과 아울러 혼색이 발생하기 쉽고, 세척된 칼라필터를 회수하는 것이 어렵기 때문에 가격이 높아지는 문제점이 있다. 따라서, 본 발명은 플라즈마 디스플레이 패널소자 상판의 상부 유리기판과 투명/버스전극, 투명/버스전극과 하층유전체, 하층유전체와 상층유전체 또는 상층유전체와 보호막 사이의 한 영역에 블랙층을 격자의 형태로 형성한 다음 잉크젯 인쇄법을 적용하여 R,G,B 색상의 칼라필터를 블랙층이 형성되지 않은 영역에 채워넣는 것을 특징으로 하는 플라즈마 디스플레이 패널소자의 칼라필터 형성방법을 제공하여 단순한 공정을 통해 칼라필터의 두께 및 폭 균일도를 향상시킴과 아울러 효과적으로 제어할 수 있고, 비용을 절감할 수 있는 효과가 있다.
Patent KR-20020000049-A (KR)
Title: Method of forming a metal wiring in a semiconductor device
Inventor: PYO SEONG GYU
IPC: H01L21/4763
Filed: 2000-06-20
Abstract: PURPOSE: A method for manufacturing a metal interconnection of a semiconductor device is provided to easily bury an interconnection with no defect, by making a buried space inside a pattern from being reduced by a diffusion barrier layer or seed layer in a process for forming a semiconductor device having a ultra-fine structure of a design rule not greater than 0.10 micrometer. CONSTITUTION: A photoresist layer is formed on a semiconductor substrate(21) on which a predetermined structure including a lower metal interconnection(23) is formed, and is patterned to expose the lower metal interconnection. A chemical intensifier process is performed to make a chemical intensifier absorbed only to the upper portion of the exposed lower metal interconnection. A metal layer(26) is selectively evaporated by a chemically enhanced chemical vapor deposition(CECVD) method in a portion where the chemical intensifier is formed. The chemical intensifier comes to float as the metal layer is evaporated. A diffusion barrier layer spacer is formed on the sidewall of the metal layer left after the photoresist layer and the chemical intensifier are eliminated. An insulation layer is formed on the resultant structure to bury the gap between the metal layers.
Patent KR-20020009932-A (KR)
Title: On-line Shopping And Provider System For Customer On Demand In Internet
Inventor: KANG WON SIK
Filed: 2000-07-28
Abstract: PURPOSE: A method for buying and producing a customized product based on the Internet is provided to perform a product supply and a service based on a consumer by enabling a consumer to reflect one's intention in producing a product substantially directly. CONSTITUTION: A consumer connects to the Internet using an Internet user interface(201). The consumer connects to a site of a service system on the Internet(202). If the consumer selects a purchase-wanted product classification(203), a system server supplies detail information with respect to the corresponding product to the consumer and waits a selection of a product specification by the consumer(204). If the consumer selects "refrigerator", selection specifications as a wanted type, a wanted color, a wanted material, a capacity and size are suggested, and "completed refrigerator" made by user-selected specifications is displayed as a three-dimensional image(205). If the final selection of the consumer is achieved, all information to the product selected by the consumer is transmitted to the corresponding product manufacturer through the Internet(206). If an order of a directed designed product is received by the consumer, a manufacturer executes a manufacturing process and a delivering process to the corresponding product(207). Data collected from consumers are analyzed and processed, and used as data for managing a client after this and forecasting a future market(208).
Patent KR-20020012352-A (KR)
Title: A Method and System for Removing Ineffective Parts of Shadowmasks from the Continuous Half-Etched Metal Strip
Inventor: HAN CHUL HO
IPC: H01J9/02
Filed: 2000-08-07
Abstract: PURPOSE: An apparatus for removing circumference ineffective part of a shadow mask and a method thereof are provided to eliminate circumference ineffective part from a continuous metal sheet without using a separate member. CONSTITUTION: An apparatus for removing circumference ineffective part of a shadow mask comprises a supplier for avoiding inclination of a metal sheet, a sub-separator for lengthwise separating some of ineffective part of the metal sheet, a main separator for separating whole part of the ineffective part of the metal sheet, and a crusher for crushing the separated ineffective part. The supplier includes a guide roller(10), a height adjustment bar(12), an interval adjuster(11), and a transfer roller(13). The sub-separator includes a press roller(21), a lengthwise separation roller(22), a transfer flat belt(23), a flat belt pulley, and a rotation axis(24). The main separator includes a front supporter(32), a main separation cane(33), an anti-moving roller(34), a back supporter(35), an ineffective guide plate(41), and a back press roller(36). The crusher includes a pulling roller(42) and a crushing roller(43).
Patent KR-20020014380-A (KR)
Title: Cyber card-loan system
Inventor: YIM YEONG JUN
Filed: 2000-08-17
Abstract: PURPOSE: A cyber card loan system is provided to enable a user to receive a loan within the limit of the total credit limit of a credit card by using a card loan through the Internet. CONSTITUTION: The card loan method using the cyber card loan system comprises steps of registering as a card loan member(S10), applying for a card loan(S20), transmitting the card loan application data to a card company(S30), inspecting a loan by searching a member ledger of the card company(S40), and loaning out by depositing a loan if the loan is approved(S50). The card loan has a limit of the card loan according to the card credit. The card of the cyber card loan system has a limit of a total card credit including the limit of the card loan, the products purchasing and the cash service. The card loan is applied via the Internet, a telephone, an ARS(Automatic Response System), an ATM(Automated Teller Machine), off-line, a facsimile or mail. Therefore, a user conveniently applies for a card loan.
Patent KR-20000072315-A (KR)
Inventor: AHN SHANG BEOM
IPC: A47L7/04
Filed: 2000-08-29
Abstract: PURPOSE: An air circulation type vacuum cleaner is provided to discharge filtered air outside for sucking dirt sticked on a bottom by the force of the air into the cleaner, thereby removing dirt in gaps on the floor or corners. CONSTITUTION: An air circulation type vacuum cleaner includes a suction unit(30) for sucking air, a dust collecting chamber(40) for filtering air sucked by the suction unit, a discharge hole(70) disposed in the suction unit for discharging filtered air, a motor(50) for moving air, and a housing for accommodating the dust collecting chamber and a motor, wherein the suction unit has an opened suction hole(20) around the discharge hole, a blowing tube(60) is connects the discharge hole to the motor, the discharge hole and the blowing tube is connected via a flexible tube.
Patent KR-20010098353-A (KR)
Title: 제품 리사이클 요금 결제 방법과, 그 실시 장치 및시스템
IPC: G06Q50/00
Filed: 2000-08-30
Abstract: 다 사용한 제품의 리사이클을 행할 때 요금 결제를 행하는 제품 리사이클 요금 결제 방법에 있어서, 발행한 리사이클증의 ID 정보와 배출자에게 판매된 리사이클증을 나타내는 판매 정보를 대응시켜 리사이클증 정보로서 관리하는 단계와, 상기 리사이클증 정보의 내용에 기초하여 리사이클증 판매 요금을 산출하고, 상기 산출한 리사이클증 판매 요금의 청구 및 수취를 행하는 단계와, 상기 청구된 리사이클증 판매 요금의 지불을 행하는 단계를 포함하는 것이다.  이에 따라, 제품 리사이클에 관한 비용의 관여자 간의 결제를 정확하거 적정하게 행하는 것이 가능한 기술을 제공한다.
Patent KR-20020018700-A (KR)
Title: Laser combat training equipment
Inventor: KIM SU CHAN
IPC: F41A33/02
Filed: 2000-09-04
Abstract: PURPOSE: A laser engagement training system is provided to obtain performance similar to a real firing machine by copying the performance of the firing machine, which is high in hit rate of a short distance and low in hit rate of a long distance by using a laser beam for long distance and a laser beam for short distance. CONSTITUTION: A laser engagement training system includes a first shooting part for shooting first laser light having a large divergent angle and a low intensity, and a second shooting part for shooting second laser light having a divergent angle smaller than that of the first laser light. The first laser beam is lower in intensity than that of the second laser beam. The first laser beam and the second laser beam are shot at the same time.
Patent KR-20020018778-A (KR)
Title: Epoxy molding compound for sealing of electronic component
Inventor: KIM JAE SIN
IPC: C08L63/00
Filed: 2000-09-04
Abstract: PURPOSE: An epoxy resin composition for sealing a semiconductor device is provided to prevent the delamination between a wafer chip and an epoxy packing material and the cracking of the surface of a pad and a chip due to a high temperature. CONSTITUTION: The epoxy resin composition comprises 1-8 wt% of a diglycidylhexamethylbiphenyl epoxy resin of the formula 1, wherein R is the same or independent each another and are H or methyl group, and n is 0.01-3; 2-6 wt% of an o-cresol novolac resin of the formula 2, wherein R is the same or independent each another and are methyl or hydroxy group, and n is 0.01-3; 2-9 wt% of a polyfunctional cyanate ester resin prepolymer of the formula 3, wherein R is the same or independent each another and are H or methyl group, and n is an integer of 0-4, or the formula 4, wherein R and R' are the same or independent each another and are H or methyl group; 0.05-0.40 wt% of a latent curing catalyst; 0.8-1.2 wt% of a flame retardant; 4.2-8.8 wt% of a wax; and 67-89 wt% of an inorganic filler.
Patent KR-20010030272-A (KR)
Inventor: ONO TOSHIYUKI
IPC: C21D8/02
Filed: 2000-09-05
Abstract: PURPOSE: An alloy sheet for electron gun electrodes is provided which improves drawability that has lately been more difficult to have, and does not produce generation of drawing cracks easily. CONSTITUTION: The Fe-Cr-Ni alloy for electron gun electrodes comprises 15 to 20 wt.% of Cr, 9 to 15 wt.% of Ni, 0.12 wt.% or less of C, 0.005 to 1.0 wt.% of Si, 0.005 to 2.5 wt.% of Mn, 0.03 wt.% or less of P, 0.0003 to 0.0100 wt.% of S, 2.0 wt.% or less of Mo, 0.001 to 0.2 wt.% of Al, 0.005 wt.% or less of O, 0.1 wt.% or less of N, 0.1 wt.% or less of Ti, 0.1 wt.% or less of Nb, 0.1 wt.% or less of V, 0.1 wt.% or less of Zr, 0.05 wt.% or less of Ca, 0.02 wt.% of Mg and a balance of Fe and inevitable impurities. In case that the Fe-Cr-Ni alloy sheet is rolled to 0.1-0.7mm in thickness, up to 20 inclusion clusters with 10-20μm width and at least 20μm length is found on a square millimeter nital-etched surface, and up to 5 inclusion clusters with at least 20μm width and at least 20μm length is found on a square millimeter nital-etched surface.
Patent KR-20020020012-A (KR)
Title: Coin filling device and using method thereof
Inventor: LEE MYEONG GYU
IPC: G07D1/00
Filed: 2000-09-06
Abstract: PURPOSE: An apparatus for charging coins and a use method thereof are provided to automatize the supplement of coins and the settlement of accounts. CONSTITUTION: The apparatus for charging coins comprises plural coin supply devices(100) for discharging coins one by one; a transfer device for fixing and transferring a coin provision device(500); a computer(200) for controlling the coin supply device and the coin provision device; and a set case(400) for setting the coin supply device, the computer, and the transfer device. According to the use method of the apparatus, the coins are automatically charged into the coin provision device and the selling is calculated from coin provision data of the coin provision device, so the supplement and the settlement of accounts are automatized.
Patent KR-20010030307-A (KR)
Title: Extraction Equipment For Paper Money
Inventor: BROOKMAN ANDREW
IPC: B65H3/12
Filed: 2000-09-07
Abstract: PURPOSE: Sheet extraction and dispensing apparatus and method are provided, which are extract only one piece of paper money to carry it out by providing a suction box capable of being moved when sucking a piece of paper money and a roller means for carrying the sucked paper money out. CONSTITUTION: The sheet extraction apparatus comprises: a sheet extraction mechanism(25) having a vacuum port, which can be moved into engagement with a leading sheet of a stack and then away from the stack to separate a leading portion of the sheet from the rest of the stack; a feed member(36) for feeding out the separated sheet; and a control system for controlling operation of the sheet extraction mechanism. A sheet store comprises a base and side walls extending along opposite sides of the base, a dispense outlet located at one end of the base between the side walls and a biasing member for urging sheets along the base towards the dispense outlet. The dispense outlet and biasing member are oriented so that sheets in the store lie with their planes at a non-orthogonal angle to the base.
Patent KR-20020020573-A (KR)
Title: Mail carry a box
Inventor: LEE SANG SU
IPC: A47G29/12
Filed: 2000-09-09
Abstract: PURPOSE: Provided is a mailbox which uses a cover with a suspension member and a slide projection formed to bind to a body so that it shortens time in binding or releasing. CONSTITUTION: The mailbox with the cover wherein the suspension member and the slide projection are formed comprises the parts of: a main body(12) which forms certain space; the cover(12) which is covered to the main body; a sealing tool(30) which is inserted between the cover and the main body; and a slide projection tool(15) which is bound with an opening part in a vertical member(14A) of the main body by multiple slide projections formed in the external side of a vertical member(13A) wherein a horizontal member(14B) is extended vertically in the upper side of the main body and a horizontal member(13B) is extended vertically in the lower part of the cover.
Patent KR-20020023587-A (KR)
Inventor: LIM YUN JAE
IPC: A01K59/00
Filed: 2000-09-23
Abstract: PURPOSE: An apparatus for impounding bees used to extract honey is provided to temporarily impound the bees by using smoke during the extracting work of honey, thus simplifying the extracting work, and protecting workers from the bees. CONSTITUTION: The apparatus for impounding bees, disposed on a rectangular case(1) in which plural beehives(5) are received, comprises a frame(20) disposed at upper edge of the case, in which an opening and closing window(22) is installed so as to be actuated by a lever(21); an arc shaped support(15) fitted in both ends of the frame; and a net(10) that a lower end is attached inside the frame for impounding the bees. The net has a cloth sewed in a square pyramid form, and the cloth is formed with ventilation holes along upper and lower edges. The net is connected to the support by using a string(14).
Patent KR-20010039931-A (KR)
Title: Semiconductor device and method of manufacturing the same
Inventor: AOYAMA MASASHIGE
IPC: H01L21/336
Filed: 2000-09-28
Abstract: PURPOSE: A semiconductor device and a fabricating method therefor are provided to improve the drive power of a P-channel DMOS transistor. CONSTITUTION: The semiconductor device has a P+ high-concentration source and drain layers(12) formed in an N-type well(2), a gate electrode(18) formed on a channel layer which is positioned between the source and drain layers(12), an N-type body layer(14) formed in the vicinity of the source layer(12) and a P-type low-concentration drain layer(6) formed between the channel layer and the drain layer(12), and the device is characterized in that a P-type layer(16) is formed in the channel layer formed on the upper body layer(14).
Patent KR-20020027684-A (KR)
Title: washer with washing tub being possible rotation and rectilinear movement
Inventor: AHN JUN HO
IPC: D06F21/08
Filed: 2000-10-04
Abstract: PURPOSE: A washing machine having a laundry tub capable of rotating motion and straight motion is provided to prevent twist of the laundries and laundry performance by the rotating motion and straight motion of the laundry tub at the time of washing stroke. CONSTITUTION: A washing machine having a laundry tub capable of performing rotating motion and straight motion includes a case(4) having a cover formed on an upper portion, a reservoir(6) mounted inside the case for storing wash water, a laundry tub(8) mounted inside the reservoir for generating wash water current and vertical vibration water current to perform washing action, a driving motor(10) mounted at a lower portion of the laundry tub for rotating and vertically vibrating the laundry tub, and a damper(12) for supporting and buffering the reservoir.
Patent KR-20010050934-A (KR)
Inventor: WATANABE MASAHIKO
IPC: H01F1/34
Filed: 2000-10-10
Abstract: PURPOSE: To obtain NiMnZn-based ferrite that has a superior DC superimposition characteristic and low power loss at temperature, ranging from the room temperature to approximately 150 deg.C . CONSTITUTION: In a NiMnZn-based ferrite, main constituent are set within a main constituent range of Fe2O3=53 to 59 mol.%, MnO=22 to 41 mol%, ZnO=4 to 12 mol%, and NiO=2 to 7 mol.% as they should be, and at the same time the sub constituents are within sub constituent ranges of SiO2:0.005 to 0.03 wt.%, CaO:0.008 to 0.17 wt.%, and P:0.0004 to 0.01 wt.%.
Patent KR-20020034306-A (KR)
Title: Pixel isolation method in CMOS image sensor
Inventor: PARK YONG
IPC: H01L27/146
Filed: 2000-10-31
Abstract: PURPOSE: A method for isolating a pixel of a complementary-metal-oxide-semiconductor(CMOS) image sensor is provided to improve a fill factor and a noise characteristic and to prevent a cross talk, by isolating pixels without generating a bird's beak so that the area of a pinned photodiode is reduced. CONSTITUTION: An isolation mask of which the field region is opened is formed on a substrate(201). An isolating impurity layer(205) is formed by an ion implantation process. The isolation mask is removed. The pinned photodiode is formed in an active region by a pinned photodiode mask and an ion implantation process.
Patent KR-20020034010-A (KR)
Title: Wireless Phone with function of fragrance signal
Inventor: KIM JI HO
IPC: H04B1/38
Filed: 2000-11-01
Abstract: PURPOSE: A portable phone having an aroma signalling function is provided to present an olfaction type sound generation function to emit fragrance, if a portable phone signal is inputted, so that a user can recognize a signal sound. CONSTITUTION: A grill(20) is inserted into the upper part of a portable phone(10). The grill(20) has holes to emit fragrance. The grill(20) is so formed as to be easily inserted into or separated from the portable phone(10) for the installation or replacement of an aroma cartridge(30). A small fan(40), installed beside the aroma cartridge(30), works when a portable phone signal sound is supplied. Instead of the small fan(40), a vibration member can be installed so that the fragrance of the aroma cartridge(30) can be emitted through the grill(20) by the vibration of the vibration member.
Patent KR-20020034459-A (KR)
Title: An Electron Gun for Color Cathode-ray Tube
Inventor: KIM MUN SIK
IPC: H01J29/48
Filed: 2000-11-02
Abstract: PURPOSE: An electron gun for color cathode ray tube is provided to improve an over-shooting phenomenon of cathode current by reducing a thermal deformation phenomenon of an acceleration electrode. CONSTITUTION: A heater(21) is used for generating heat. A cathode support body(23) is used for supporting three cathodes(22) formed on a front face of the heater(21). The first electrode(24) is used for controlling electron beams emitted from the cathodes(22). The second electrode(25) is installed at a predetermined interval from the first electrode(24). The second electrode(25) is used for accelerating the electron beams. The third electrode(26) and the fourth electrode(27) are installed on a front face of the second electrode(25). The first and the second acceleration focus electrodes(28a,28b) are installed on a front face of the fourth electrode(27). A focus electrode(29) and a shield cup(30) are formed in front faces of the first and the second acceleration focus electrodes(28a,28b). The electrodes(24-30) and the cathode support body(23) are fixed by two insulating support bodies(31).