baber/WOPTO huggingface dataset:
Patent KR-19990081471-A (KR)
Title: 더블유엘엘 시스템에서 착신벨이 울리는 시점을 변경하여 무선자원을 절약하는 방법
IPC: H04B7/26
Filed: 1998-04-30
Abstract: 본 발명은 WLL(Wireless Local Loop:무선가입자망) 시스템에서 무선자원    할당 방법에 관한 것으로, 특히 단말국과 기지국간의 무선접속을 위하여 필요한    무선자원의 할당시 가입자측의 착신벨이 울리는 시점을 변경시킴으로써 착신벨이   울리는 시간동안의 무선자원을 절약하는 방법에 관한 것이다.  본 발명에 따르면,   무선가입자망 시스템에서 단말국과 기지국간의 무선접속을 위하여 필요한 무선자원을 할당하는 방법은, 먼저, 기지국이 단말국을 호출하기 위해 호출 메시지를 발생한다.   이후, 호출 메시지에 응답하여 단말국의 착신 벨이 울리도록 한다.    다음으로, 무선 자원을 할당한다.  이와같이, 가입자측의 착신벨이 울리는 동안에는 무선자원을 할당하지 않음으로써 무선자원을 절약할 수 있다.
Patent KR-19980086825-A (KR)
Title: 본딩 하중의 보정방법 및 와이어 본딩장치
IPC: B23K20/00
Filed: 1998-05-07
Abstract: 기계적 요인이나 인적요인에 의한 교정차가 생기지 않음과 동시에, 본딩점이 어떤 높이 위치에 있어도, 설정된 본딩 하중과 동등한 실제본딩하중을 얻을 수가 있다. 
     컴퓨터(21)는 무부하시 및 추(43)를 지지프레임(3)에 장착하여 리니어모터(7)에 본딩하중의 발생시와 동등한 부하를 걸었을 때의 각각의 상태에 있어서 본딩아암(2)의 높이위치의 위치어긋남을 보정하는 보정치와 상기 전력을 제한하는 리미트치를 기억하는 메모리(45)를 갖는다.
Patent KR-19990085250-A (KR)
Title: 반도체 하이스피드 패키지 검사용 소켓
IPC: H01L21/66
Filed: 1998-05-15
Abstract: 본 발명은 반도체 하이스피드 패키지 검사용 소켓에 관한 것으로, 소켓 하우징(11)에 고정블럭(14)을 이용하여 핀어셈블리(12)를 고정설치함으로써, 검사시 종래와 같이 컨택트 핀과의 접촉에 의하여 디유티 보드의 패드가 마모되는 것을 방지할 수 있을뿐아니라, 컨택트 핀의 교체시 고정블럭을 해체하고 핀어셈블리를 교체하는 것으로 간단히 교체할 수 있는 효과가 있다.
Patent KR-20000000613-A (KR)
Title: Glasses frame legs automatization processing apparatus
Inventor: KIM GUN HEE
IPC: B23P13/00
Filed: 1998-06-02
Abstract: PURPOSE: A glasses frame leg automation processing apparatus is provided to produce many kinds of products but small numbers of each that consumers want to buy in a short term by automating a process system producing the legs. CONSTITUTION: A temple automation processing apparatus comprises: a work blocking with a clamping unit(22); an input unit(10) interlocking the temple to be fixed by a compact cylinder(28) and a spring; a first bending unit(12) applying the work for a rotative form to give flexibility of a refracting angle; a slitting unit(16) applying a work that slits to the proper recessed depth; a second bending unit(18) applying a work that is all bending to the slitting part of a slitting product; and an output unit(20), an abstract process, applying a work that sets up by two pieces.
Patent KR-20000000635-A (KR)
Title: Method for manufacturing a trench isolation
Inventor: JEONG IN KWON
IPC: H01L21/76
Filed: 1998-06-02
Abstract: PURPOSE: A fabrication method of trench isolation is provided to prevent a dent phenomenon generated in edge portion of the trench isolation using a trench etching mask. CONSTITUTION: The method comprises the steps of: forming a trench etching mask(102) by patterning a first oxide(102a) and a first nitride(120b) having thinner thickness compared to the first oxide formed on a semiconductor substrate(100); forming a trench(104) by etching the semiconductor substrate using the trench etching mask as a mask; forming a second oxide(105) at inner walls of the trench; sequentially forming a second nitride(106) and a third oxide(108); etching the third oxide, the second nitride and the first nitride until the first oxide is exposed; and forming a trench isolation(110) by etching the third oxide and the first oxide until the surface of the semiconductor substrate(100) is exposed.
Patent KR-20000000820-A (KR)
Title: Degating system and method
Inventor: LEE TAE KWANG
IPC: H01L21/56
Filed: 1998-06-03
Abstract: PURPOSE: A degating system is provided to replace a different type of gating in the same degating system. CONSTITUTION: The degating system for cutting a gate portion of a cull(3) of a molded lead frame(1) comprising a plate portion having a upper plate(5) and a lower plate(6), and receptable according to a shape thereof on which the molded lead frame is positioned, a press for supporting and pressing the upper plate and the lower plate in order to cutoff the gate portion, and cull collection portion(17) for collecting the curl cutoff. The plate portion is mountable selectively according to the shape of the gate in which is a butterfly type plate (4) or a pin type plate.
Patent KR-20000002032-A (KR)
Title: Mobile communication terminal available to direct access of short message and direct access method
Inventor: NAM HYONG MIN
IPC: H04B1/40
Filed: 1998-06-16
Abstract: PURPOSE: A mobile communication terminal is provided to increase convenience of an interface to check easily a short message that is received or sent on the mobile communication terminal. CONSTITUTION: The mobile communication terminal available to a direct access of a short message comprises: a transmitting and receiving part(210) having a transmitting part that transmits a short message through the wireless interface of the mobile communication net and a receiving part that receives a short message; a user interface part(230) that manages a short message according to the command from the user; and a display indicating part(231) indicating that the short message is received through the transmitting and receiving part on the display screen.
Patent KR-20000009498-A (KR)
Title: Manufacturing method and device of crude aggregate and crushed sand for construction
Inventor: LEE JONG KOO
IPC: B02C1/00
Filed: 1998-07-24
Abstract: PURPOSE: A manufacturing method and a device of crude materials and crushed sand for construction is provided to save the manufacturing costs of a plant and the crude aggregate. CONSTITUTION: The device is composed of: a first crusher(12) for crushing a rock and recollecting soil powder and passing them; a second crusher(15) for crushing the rock before inserting the rock into a first vibrating screen(18); a third crusher(16) for crushing the remained rock again and inserting the crushed rock into the first vibrating screen; a water-sprayer(23) for spraying water onto the rock passing through the vibrating screen; a divider(24) for dividing the crushed sand and putting them with the crushed sand together; a filter press(26) for discharging the sludge by molding the sludge into a cake.
Patent KR-20000010254-A (KR)
Title: Subsidiary equipment for operating vehicle clutch
Inventor: KANG SUNG SIK
IPC: B60K23/02
Filed: 1998-07-31
Abstract: PURPOSE: A subsidiary equipment for operating a crutch is provided to easily install for a simple structure and automatically operate the clutch by applying the equipment to all sorts of vehicles. CONSTITUTION: The working device of the subsidiary equipment for operating the crutch has; a connecting member(11) connecting inside a housing(10) that is attached to the flange of a master cylinder(50); a working rod(12) forming a rack gear on both side faces and forming a guiding bar(13) to be expanded on the other side, facing the outer lateral of the connecting member; a spring(14) for feeding elasticity to the working rod; a driving device for working the working rod; and a measuring device for grasping the position of the working rod. Therefore, if the working rod is moved by the driving rod, the connecting member that is connected to a piston rod(51) of the master cylinder, is pushed and the crutch is settled by a pressed oil that is discharged from the master cylinder.
Patent KR-19990023661-A (KR)
Title: 액정 화합물
IPC: C09D4/02
Filed: 1998-08-18
Abstract: 본 발명은 하기 화학식 1의 액정 화합물에 관한 것이다. 
     
       
         
       
     
     상기 식 중, P 1 및 P 2 는 각각 수소, C 1 -C 4 알킬 또는 중합반응을 일으킬 수 있는 반응성 라디칼이고, 
     Y 1 및 Y 2 는 각각, 하나의 화학 결합, 산소, 황, -O-CO-, -CO-O-, -O-CO-O-, -CO-NR-, -NR-CO-, -O-CO-NR-, -NR-CO-O- 또는 -NR-CO-NR-이고, 
     R 은 수소 또는 C 1 -C 4 알킬이고, 
     A 1 및 A 2 은 에테르 작용기의 산소, 티오에테르 작용기의 황 또는 인접하지 않은 이미노기 또는 C 1 -C 4 알킬이미노기가 개입될 수 있으며 사슬내 탄소 원자수가 1 개 내지 30 개인 스페이서(spacer)이고, 
     M은 메소제닉기이다. 
     본 발명은 또한 상기 화학식 1의 화합물을 포함하는 혼합물, 상기 화학식 1의 화합물을 포함하는 조성물, 상기 화학식 1의 화합물을 제조하는 방법, 상기 신규한 화합물, 혼합물 또는 조성물로 된 피막을 형성시키는 방법, 그리고 이 방법으로 피복된 물품에 관한 것이다. 
     또, 본 발명은 상기 신규한 화합물, 혼합물 또는 조성물을 광학적 성분 및 액정 착색제를 제조하는 데 사용하는 방법, 상기 신규한 화합물, 혼합물 또는 조성물을 포함하는 액정 착색제 및 수성 에멀션 또는 수성 분산물, 그리고 상기 신규한 화합물, 혼합물 또는 조성물을 중합시키므로써 제조할수 있는 안료에 관한 것으로서, 제조되는 안료 크기 및 형태는 중합반응 전에 적당한 기술을 사용하거나 또는 중합반응후 분쇄하므로써 결정된다.
Patent KR-19990023827-A (KR)
Inventor: TANIKAWA AKIRA
IPC: D21H19/46
Filed: 1998-08-25
Abstract: 본 발명은, 안료(I), 수성 결합제(II) 및 헤테로사이클릭 아민(a)과 분자내에 2개 이상의 글리시딜 그룹을 갖는 글리시딜 화합물(b)을 반응시켜 수득 가능한 가교결합된 아민 화합물(III)을 포함하는 종이 피복 조성물 및 이의 제조방법을 제공한다.
Patent KR-20000015025-A (KR)
Title: Fabrication method of semiconductor device
Inventor: KIM KYUNG JAE
IPC: H01L21/00
Filed: 1998-08-26
Abstract: PURPOSE: The method is to fabricate a semiconductor device without a step between a MOS transistor and an electrostatic discharge protection part(ESD) on a Silicon On Insulator(SOI) wafer. CONSTITUTION: The method improves the characteristics of the MOS transistor and the electrostatic discharge protection part by comprising the steps of: revealing a semiconductor substrate(20) by etching a first silicon film and an oxide film(21) on one side of the SOI wafer where the semiconductor substrate,the oxide film and the first silicon film are stacked through photolithography process; performing the planarization process after forming a second silicon film on the front; forming an isolation area insulating the first and second silicon film electrically; and fabricating a CMOS transistor(CMOS) on the first silicon film and also fabricating the electrostatic discharge protection part on the second silicon film.
Patent KR-20000020044-A (KR)
Title: Shape clamping device for injection molding machine
Inventor: CHO WON TAE
IPC: B29C45/03
Filed: 1998-09-17
Abstract: PURPOSE: A shape clampling device is provided to efficiently improve shape combining force without increasing volume of a main cylinder in an injection molder. CONSTITUTION: A right, left and middle wedge(13)(14)(15) form each groove part which is hung on a jack nut(7) but passes through a clamping bar(8). The wedges are clampled by a wedge operating cylinder(17) to move vertically and the middle wedge is additionally slid between the right and the left wedge by a shape clamping cylinder(16). When operating the shape fixing cylinder to go the middle wedge up, shape combining force in a shaft direction is delivered to the right and left wedge. Then, the right wedge is pushed to the right as the left wedge is clamping by a rear fixing board(1) so sufficient applied to a metal mold(11) since the jack nut, the combining bar and a metal mold moving board(2) gain strong force to the side of a metal mold clamping board(3).
Patent KR-20000020599-A (KR)
Title: Light atm switch of space-wavelength mixture type
Inventor: SONG YONG HUN
IPC: H04L12/433
Filed: 1998-09-22
Abstract: PURPOSE: A switch is provided to reduce a loss of a signal by reducing the number of components in a hardware and to provide a mass capacity of services by increasing switching capacity into a mass capacity. CONSTITUTION: A variable wavelength conversion part(100) performs a wavelength conversion for routing a time division multiplexed signal. An input buffer(200) is correspondingly connected to the variable wavelength conversion part(100). A space part(300) switches and transmits signals each having different wavelengths from the input buffer(200), compresses the transmitted signals, and performs routing spacially. A wavelength part(400) routes the routing signals in a converted wavelength. An output buffer(500) converts wavelength division multiplexed signals into time division multiplexed signals. A signal reverse compression part(600) is connected to the output buffer(500) to the time division multiplexed signals to original signals through a reverse compression.
Patent KR-20000021540-A (KR)
Title: Optical disk driving system for information provider
Inventor: HAN MOON HO
IPC: G11B7/14
Filed: 1998-09-30
Abstract: PURPOSE: An optical disk driving system for an information provider is to smoothly provide information in the case that several information users access a single title by accessing the single title using two pick-up deck mechanisms. CONSTITUTION: A spindle motor(10) rotates an optical disk(1). A spindle motor driving unit(11) drives the spindle motor(10) for rotating the optical disk(1) at a constant angular velocity. A first and a second pick-up deck mechanisms(20,30) emit a laser beam on a surface of the optical disk(1) and access information recorded in the optical disk(1). A first pick-up driving and controlling unit(40) drives and controls the first pick-up deck mechanism(20). A second pick-up driving and controlling unit(50) drives and controls the second pick-up deck mechanism(30). A first signal processing unit(60) adds a synchronous code, a channel ID, and data block size information to a data stream outputted from the first pick-up deck mechanism(20). A second signal processing unit(70) adds a synchronous code, a channel ID and data block size information to a data stream output from the second pick-up deck mechanism(30).
Patent KR-20000025282-A (KR)
Title: Method for forming contact pad
Inventor: SHIN JONG HUN
IPC: H01L21/28
Filed: 1998-10-09
Abstract: PURPOSE: A method for forming a contact pad having improved profile is provided to increase an overlap margin both of the contact pad and an isolating layer and reduce a mis align margin of contacts by using a slope etching. CONSTITUTION: A storage electrode contact pad(110) and a bit line contact pad are simultaneously formed by etching a conductive layer. The contact pads(110) are electrically connected to an active region of a semiconductor substrate(100). Using a slope etching the contact pads(110), the lower width of the etched profile of the contact pads is relatively wider than that of the upper width of the etched profile of the contact pads.
Patent KR-20000032765-A (KR)
Title: Method for removing common-mode pulse in three phase pwm(pulse width modulation) converter-inverter system
Inventor: SEOL SENG GI
IPC: H02M5/458
Filed: 1998-11-17
Abstract: PURPOSE: A method is to remove a common-mode pulse in a 3-phase PWM converter-inverter system by only operating the gating of an inverter without an additional hardware. CONSTITUTION: A method is characterized by shifting a gating time to coincide with the gating time of a converter without distorting an effective output voltage of the inverter, by using: an LL method of according to the highest phase among pole voltage instructions of the converter by shifting the gating time of the highest phase among pole voltage instructions of the inverter; an SS method of according to the lowest phase among pole voltage instructions of the converter by shifting the gating time of the lowest phase among pole voltage instructions of the inverter; an LM method of according to the second largest phase among pole voltage instructions of the converter by shifting the gating time of the highest phase among pole voltage instructions of the inverter; and an SM method of according to the second largest phase among pole voltage instructions of the converter by shifting the gating time of the lowest phase among pole voltage instructions of the inverter. According to the method, one of three common-mode voltage within one control period can be removed or a common-mode voltage pulse of 2Vdc/3 can be removed.
Patent KR-19990045409-A (KR)
Title: 실리콘 게이트 전계 효과 트랜지스터 제조 방법
IPC: H01L29/78
Filed: 1998-11-19
Abstract: 본 명세서에는 실리콘 게이트 전계 효과 트랜지스터(silicon gate field effect transistor)에 사용되는 게이트 유전층을 제조하는 공정이 개시되고 있다.   게이트 유전체 층은 SiO 2 로 성장된 제 1 층, 실리콘 질화물이 증착된 제 2 층 및 SiO 2 가 증착된 제 3층의 복합층(composite)이다.   복합 게이트 유전체 층(composite gate dielectric) 내에 존재하는 실리콘 질화물(nitride silicon)은 붕소 도핑(boron doped)된 폴리 게이트(poly gate)로부터 채널(channel)로의 붕소 확산을 방해하며, 이에 따라 재생 가능한 게이트 임계 전압(threshold voltage)이 발생된다.   이 층들은 LPCVD(low pressure chemical vapor deposition) 반응기 내에서 인시튜(in-situ)로 형성된다.   이 증착된 층들은 남아있는 수소를 제거하기 위해 어닐링(annealing)되며, 이에 따라 게이트 유전체 층 내에서의 트랩 밀도(trap density)는 감소된다.
Patent KR-19990046227-A (KR)
Title: 비엘디시 모터용 오일레스메탈 고정장치_
Filed: 1998-11-19
Abstract: 본 발명은 비엘디시 모터용 오일레스메탈 고정장치에 관한 것으로, 종래 오일레스메탈 고정장치는 메탈커버가 단순히 코킹되어 브라켓 상에 고정되기 때문에 오일레스메탈로부터 흘러나온 오일이 메탈커버 전면으로 누유되는 문제와, 오일레스메탈이 고정되는 요홈 하측이 빈 공간으로 유지되기 때문에 이곳으로 유입된 일부 오일이 모터의 회전축에서 발생된 열기에 의해 건조되어 모터의 수명단축을 가속화시키는 문제가 있었다. 
     본 발명은 이러한 문제를 해결하기 위하여, 회전자의 회전축이 고정되는 브라켓의 외면 중앙에 상기 회전자측을 향하여 사다리꼴 형상으로 형성되며 그 상측 내주연에는 외측을 향하여 만곡지게 요입된 안내부를 갖는 요홈과, 상기 요홈 전체에 충진되는 셀룰로이스와 같은 섬유질의 충진물과, 상기 요홈에 안착되어 상기 회전축이 원활하게 회전될 수 있도록 지지하는 오일레스메탈과, 상기 오일레스메탈 상측에 체결되는 완충력을 가진 스프링과, 상기 스프링을 커버하며 내부에는 상기 충진물이 수납되는 공간을 갖고 상기 브라켓에 고정되며 그 중앙에는 상기 회전축이 관통되는 관통공이 형성된 메탈커버로 구성함으로써, 모터의 수명을 연장시킴은 물론 원활한 구동을 유지할 수 있도록 한 장점을 제공하는 발명임.
Patent KR-19990045594-A (KR)
Title: 속도측정장치
IPC: G01S7/534
Filed: 1998-11-26
Abstract: 본 발명의 속도측정장치는, 사전 설정된 주파수를 가진 기준신호에 기초하여 발생된 음향기준파(acoustic reference wave)를 이동하고 있는 목표쪽으로 송신하는 송신수단(transmitting means); 상기 이동하고 있는 목표에 의해 반사된 상기 송신된 음향기준파에 의해 발생된 음향반사파를 수신하고, 상기 음향반사파를 수신장치 신호로 전환시키며 그로부터 상기 수신장치 신호를 출력하는 수신수단( receiving means); 상기 수신수단으로 부터 출력된 상기 수신장치 신호내의 상기 기준신호의 주파수와 같은 주파수를 가지는 신호성분을 선택적으로 감쇠시키고 그로부터 신호를 출력하는 신호감쇠수단(siginal attenunating means); 상기 신호감쇠수단으로부터 출력된 상기 신호로 부터 적어도 하나의 도플러 신호성분을 추출하는 대역필터수단; 및 상기 대역필터수단에 의해 추출된 상기 도플러신호 성분에 기초하여, 상기 속도측정장치에 대하여 상기 이동하고 있는 목표의 속도를 계산하는 속도계산수단;을 포함하여 구성된다.
Patent KR-19990014645-A (KR)
Title: 자동차 바퀴의 회전각도 표시 장치
IPC: B60K28/10
Filed: 1998-11-30
Abstract: 본 발명은 자동차 바퀴의 회전각도 표시 장치에 관한 것이다. 
     본 발명은 회전각도 표시가 된 분할판이 핸들의 중심에서 핸들과 함께 회전하게 하고, 분할판의 중심에는 일정한 위치를 유지하는 제1지침을 형성하여 분할판이 회전하는 각도를 나타낼 수 있게 하며, 핸들의 회전 중심과 동일 중심축에서 핸들과 함께 회전하는 고정축으로부터 감속비를 가지는 기어전동기구에 의하여 감속된 회전수로 회전하는 제2지침이 제1지침의 1회전에 대하여 일정한 각도로 회전하여 핸들이 1회전된 상태를 알 수 있게 한 것이다.
Patent KR-20000034754-A (KR)
Title: Refrigerator containing transparent window
Inventor: LEE JEONG WAN
IPC: F25D23/02
Filed: 1998-11-30
Abstract: PURPOSE: A refrigerator containing a transparent window is provided for the transparent window to be selectively transparent while being needed by a user, to improve insulating capacity, and to eliminate dew formation. CONSTITUTION: At pushing a selecting switch installed in the lower end of the front surface of a freezing cavity door(200) for checking materials stored in a cavity, a controlling unit receives a discharging signal for operating a liquid crystal film(224) stored in a transparent window(220). Then, the liquid crystal film is converted from an opaque state into a transparent state for maintaining the transparent state for a certain period. Therefore, the user easily checks the kinds and the conditions of the materials stored in the cavity without opening the freezing cavity door.
Patent KR-20000037774-A (KR)
Title: Liquid crystal display having electrostatic force prevention circuit
Inventor: PARK CHEOL WOO
IPC: G02F1/136
Filed: 1998-12-02
Abstract: PURPOSE: A liquid crystal display having an electrostatic prevention circuit is provided to reduce the possibility of wires being cut around the electrostatic force prevention circuit. CONSTITUTION: A liquid crystal display having a circuit for preventing electrostatic force includes a substrate(101), wires, an electrostatic force prevention circuit(191), a second wire(193), and an auxiliary electrostatic force prevention circuit(199). The wires are formed on the substrate(101). The electrostatic force prevention circuit(191) is coupled to the wire. The second wire(193) is coupled to the electrostatic force prevention circuit. The auxiliary electrostatic force prevention circuit(199) is at least one in number and the at least one electrostatic force prevention circuit is or are embedded in at least a part of the second wire.
Patent KR-20000039013-A (KR)
Title: Apparatus and method for controlling input of switch network of asynchronous transfer mode
Inventor: CHOI DAE WOO
IPC: H04L12/28
Filed: 1998-12-10
Abstract: PURPOSE: An apparatus for controlling an input of a switch network of an asynchronous transfer mode(ATM) and a method for the same are provided to minimize the occurrence of a busy state in the switch network, by generating a test cell for each connection to an input terminal in order to estimate the busy state of the path for the test cell passes, and thereby controlling an input ratio of the network. CONSTITUTION: A de-multiplexer(110) de-multiplexes an input traffic from a member to output the de-multiplex traffics. A speed controller(120) gets a received test cell sent from an ATM switch network, and provides control signals for controlling a scheduling speed with each transmitted test cell. A de-multiplexer(130) de-multiplexes the traffics received from the ATM switch network, and transfers the test cells of the de-multiplex traffic cells to the speed controller(120) and other cells thereof to the member. A scheduler(140) schedules the unreal time traffics from the de-multiplexer(110), according to the control signals. A scheduler(150) schedules the transmitted test cell from the speed controller(120), the real time traffics from the de-multiplexer(110) and the unreal time traffics from the scheduler(140) to transfer them to the ATM switch network.
Patent KR-20000040756-A (KR)
Title: Circuit for controlling linear operation of dual power amplifier
Inventor: JEONG SEON KYU
IPC: H04B1/40
Filed: 1998-12-19
Abstract: PURPOSE: A circuit for controlling a linear operation of a dual power amplifier is provided to reduce a current consumption in an automatic power control circuit and a spurious wave and improve a transmission efficiency, by controlling the power amplifiers having different linear operation regions to be operated in their own linear operation region using one direct control voltage. CONSTITUTION: An up-hold circuit(24) is connected between a voltage buffer(20) and a power amplifier(10), and a hold-up circuit(26) is connected between a voltage amplifier(22) and a power amplifier(14). The up-hold circuit(24) passes the voltage from the voltage buffer(20) to its output terminal if the increased voltage therefrom is lower than a threshold voltage, but holds the level of the threshold voltage otherwise. The hold-up circuit(26) is designed to be operated reversely to the up-hold circuit(24). The up-hold circuit(24) and hold-up circuit(26) respectively monitor the up-holt and holt-up output voltages to increase their output voltages or keep them as the level of the threshold voltage according to the opponent's output voltage.
Patent KR-20000041093-A (KR)
Title: Method for producing dispersion strengthened copper alloy having high conduction and strength in high temperature
Inventor: PARK U JIN
IPC: C22C9/00
Filed: 1998-12-21
Abstract: PURPOSE: A method is provided to produce copper alloy having excellent strength in high temperature by regularly dispersing fine titanium boride with a reactivity spraying molding method. CONSTITUTION: A Cu-Ti mother alloy is molten in a temperature of 1100 to 1600°C and molded by spraying. A Cu-B alloy is sprayed through an injector to be a column shaped molding material. Then, the fine Cu-B powder is mixed with molten Cu-Ti to form titanium boride such as TiB, TiB2, Ti3B4 and so on in low temperature. The molding material is hot processed in a temperature of 500 to 1000°C or cold processed in a temperature of 200°C. The process increases density of the molding material and fining crystallization in order to harden the molding material. Then, the titanium boride strengthened copper alloy forms fine strengthened particles so as to have remarkably higher strength than the present molding material.