baber/WOPTO huggingface dataset:
Patent KR-20030049992-A (KR)
Title: MEMS structure having a blocked-sacrificial layer support/anchor and a fabrication method of the same
Inventor: KIM HYEON OK
IPC: B81C1/00
Filed: 2001-12-18
Abstract: PURPOSE: A MEMS structure having a blocked-sacrificial layer support and a manufacturing method thereof are provided to allow the MEMS structure to be easily connected to other electric circuits by securely connecting a fixing part fixed to a substrate to a lifting part, which is lifted from the substrate. CONSTITUTION: A sacrificial layer is deposited on a substrate(410). The sacrificial layer is patterned so as to form a space surrounding at least some part of a predetermined region corresponding to a region, in which a fixing part(431) is formed. Then, a MEMS structure layer is deposited on the sacrificial layer, thereby forming a sidewall(435) in the space and forming the fixing part(431) and a lifting part(433) on the sacrificial layer. After that the sacrificial layer is removed by using an etchant. The etchant supplied into some part of the sacrificial layer is shielded by the sidewall so that the sacrificial layer except for a part surrounded by the sidewall(435) is removed.
Patent KR-20030052329-A (KR)
Title: Fabrication method of hard ferrite using mill scale added oxidant
Inventor: AHN JAE U
IPC: H01F1/10
Filed: 2001-12-21
Abstract: PURPOSE: A method is provided to achieve improved magnetic characteristics and allow for mass production by producing a hard ferrite by using a mill scale having improved oxidation properties. CONSTITUTION: A method comprises the steps of primarily crushing a mill scale where foreign substances are removed; mixing the mill scale with an oxidizing agent; oxidizing the mill scale powder where the oxidizing agent is added; secondarily crushing the oxidized mill scale into a predetermined fineness; and mixing the crushed mill scale with a strontium carbonate or barium carbonate, and performing a calcination process to the powder mixture.
Patent KR-20020081044-A (KR)
Inventor: KAWASE YUSUKE
IPC: H01L21/768
Filed: 2001-12-21
Abstract: PURPOSE: To solve the problems of a short circuit due to deterioration in the burying characteristics of an interlayer insulation film, incomplete insulation of a sidewall spacer and increase in the overall thickness of a semiconductor device. CONSTITUTION: The semiconductor device comprises a semiconductor substrate 2 as a basic layer having a major surface, a plurality of wiring bumps 41 formed to rise linearly on the major surface, and a plurality of plugs 11 formed of a conductor to fill a part of a recess clamped and formed by the wiring bumps 41. The wiring bump 41 comprises a wiring layer 4, a stopper film 13 on the wiring serving as the upper surface protective layer of the wiring formed to cover the upper surface of the wiring layer 4, and a sidewall spacer 5 covering the side face of the wiring layer 4 and the stopper film 13 on the wiring. The upper surface of the wiring bump 41 is substantially flush with the upper surface of the plug 11 when viewed from the major surface.
Patent KR-20030053622-A (KR)
Title: Apparatus for detecting loose contect of resist volume in cpc potention-meter
Inventor: KWON GYEONG IL
IPC: B21B37/00
Filed: 2001-12-22
Abstract: PURPOSE: An apparatus for sensing loose contact of resist volume in CPC (center position control) potentiometer is provided to reduce error generation of CPC by sensing that potentiometer currently sensing position of strip is not normally operated due to loose contact of the resistance part inside the potentiometer. CONSTITUTION: The apparatus includes an electric motor operation detecting part(1) for judging whether the electric motor is driven or not by detecting output value of DC electric motor; a potentiometer input memory part(2) for memorizing the output value temporarily by reading the output value of the potentiometer; a potentiometer signal comparing and judging part(3) for judging whether resistance value is changed or not by comparing a previous value memorized in the potentiometer input memory part with current output value of the potentiometer in case that the electric motor is driven as the judgement results of the electric motor operation detecting part; and an error detecting part(4) for outputting error sensing signals in case that resistance value of the potentiometer is changed the same as or more than the setup range as results of the comparison judging part, wherein the electric motor operation detecting part comprises output detection part(11), chattering prevention circuit part(14), operation delay part and signal conversion part(16), the potentiometer input memory part comprises noise filter circuit part(21) and first and second temporary memory circuit parts(22,23), the potentiometer signal comparing and judging part comprises signal amplification circuit part(32), absolute value conversion circuit part, potentiometer deviation value setting part(35) and error judging part, and the error detecting part comprises end gate circuit part(41), and lamp part(42) and relay(43).
Patent KR-20030055020-A (KR)
Title: Apparatus for mold oscillation of continous casting machine
Inventor: HAN BYEONG HA
IPC: B22D11/053
Filed: 2001-12-26
Abstract: PURPOSE: An apparatus for oscillating mold of continuous casting machine is provided to extend life cycle of the mold by installing barrel shaped roller cohesively rotated between fixed frame and oscillation frame and prevent safety accident due to inclination of the mold by preventing the mold from being lopsided. CONSTITUTION: In a continuous casting machine oscillating apparatus for oscillating mold installed at continuous casting machine, the apparatus comprises a hydraulic cylinder(10) installed to oscillate the mold; an oscillation frame(12) connected to the upper part of the hydraulic cylinder; a fixed frame(14) installed at both sides of the oscillation frame so that the oscillation frame is not slanted; base plates installed at a side oppositely directed to the oscillation frame and fixed frame respectively; and a barrel shaped roller installed between the base plates.
Patent KR-20030056101-A (KR)
Title: Manufacturing method of carbon nanofiber electrode for supercapacitor
Inventor: CHOI WON GYEONG
IPC: C01B31/02
Filed: 2001-12-27
Abstract: PURPOSE: A method is provided to be capable of reducing an inner resistance and improving a performance. CONSTITUTION: After mixing a carbon nanofiber powder and a ketjen black powder, a sheet is fabricated by adding a teflon powder in the mixture. The fabricated sheet is pressed. A resultant structure is pressed at a nickel mesh as a collector. The ketjen black powder of 0-30wt% is added with respect to the carbon nanofiber powder. The teflon powder of 3-10wt% is added with respect to the carbon nanofiber powder. The sheet is pressed with 4000psi during 20 to 40 minutes at a temperature of 25 to 80 degrees.
Patent KR-20030058341-A (KR)
Title: An array substrate for In-Plane switching mode LCD and method for fabricating the same
Inventor: LEE JAE GYUN
IPC: G02F1/136
Filed: 2001-12-31
Abstract: PURPOSE: An array substrate for an in-plane switching mode liquid crystal display and a method for manufacturing the same are provided to secure the sufficient storage capacity and improve an aperture ratio by removing contact holes connecting storage lines and common electrodes. CONSTITUTION: An array substrate(200) includes a plurality of gate lines(212) and a plurality of storage lines(216) separated from each other at certain intervals, and a plurality of data lines(224) defining a pixel area(P) with the gate lines. A thin film transistor(T) is formed at a point where the gate lines and the data lines cross each other, and includes a gate electrode(214), an active layer(220), a source electrode(226), and a drain electrode(228). A pixel electrode(238) is formed on the pixel area and connected with the drain electrode, and a common electrode(240) is parallel with the pixel electrode and connected with the storage lines. The pixel electrode is formed of a horizontal part(238a) contacting with the drain electrode through a contact hole(234), and vertical parts(238b) vertically extended from the horizontal part. The common electrode is formed of a plurality of vertical parts(240b) separated from the vertical parts of the pixel electrode and a horizontal part(240a) connecting the plurality of vertical parts.
Patent KR-20010079690-A (KR)
Title: Process for the preparation of substituted amido phthalocyanine derivatives and substituted amido phthalocyanine derivatives
IPC: C09B47/26
Filed: 1999-08-10
Abstract: A process for the preparation of substituted amido phthalocyanines having the general formula I:MPc-(CONR1R2)nIvia the reaction of a phthalocyanine carboxamide having the formula MPc(CONH2)x wherein Pc is a Phthalocyanine ring; M is a hydrogen or a metal capable of forming a metal phthalocyanine such as Mg, Al, Ni, Fe, Zn, Pb, Sn or Cu and x is a number from 0.1 to 4.0, with an amine acid salt denoted by formula II: wherein R1 and R2 are independently selected from the group consisting of hydrogen; an alkyl group having 1-20 carbons; a cyclic alkyl group; an aryl group; an arylalkyl having 1-20 carbons; an alcohol group having 2-20 carbons; an alkyl amino alkyl group; an aliphatic amine having 1-20 carbons; an aliphatic amine acid salt having 1-20 carbons; polyoxyalkylene groups ranging in molecular weight 89-2000; polyoxyalkyleneamines ranging in molecular weight 148-4000; Z is the hydrogen sulphate or the hydrochloride salt of the amine.
Patent KR-20010088839-A (KR)
IPC: H01M4/525
Filed: 2000-07-04
Abstract: 본 발명은 발화나 폭발의 위험이 없는 안전한 수용액계 전해액을 이용한, 3 V 이상의 높은 전압이 얻어지는 리튬 2차 전지를 제공하는 것을 목적으로 한다. 
     상기 목적을 달성하기 위해서, 본 발명의 전지는 리튬 이온을 흡장, 방출하여 높은 전위를 나타내는 활성 물질 재료로 구성된 양극, 낮은 전위를 나타내는 활성 물질 재료로 구성된 음극, 리튬 이온 도전성 고분자 고체 전해질 및 수용액계 전해액을 이용하여 구성되고, 상기 양극과 음극은 이온도전성 고분자 고체 전해질에 의해서 피복되며, 수용액계 전해액과의 사이는 상기 전극 피복층에 의해서 격리되어 구성되어 있다.
Patent KR-20010089328-A (KR)
IPC: H04N1/00
Filed: 1999-10-21
Abstract: 위치 태그 데이터 설비 및 디스플레이 시스템. 
     전자기 통신 능력을 가진 개인 통신 장치(PCD)는 GPS 수신기와 디스플레이를 구비한다.  PCD는 데이터 제공자 등으로부터 PCD 상에 표시하기 위한 지도와 위치 태그 데이터를 요구한다.  데이터 제공자는 탐색 및 분류 체계를 이용하여 데이터베이스에 질의함으로써 요구에 응답하고, 그 요구에 응답하는 데이터를 요구한 PCD에 자동으로 전송한다.
Patent KR-20010080453-A (KR)
IPC: G06F9/52
Filed: 2000-09-06
Abstract: 지정된 메시지 버퍼에 저장된 메시지 데이터의 무결성을 보장하기 위해서 지정된 메시지 버퍼 내부로 메시지 데이터를 기록하는 프로세서 코어 및 프로세서 코어 외부의 하드웨어(예를 들면, DMA 엔진)를 포함하는 CAN 장치(예를 들면, CAN 마이크로콘트롤러)에서 사용하기 위한 방법.  본 방법은 지정된 메시지 버퍼의 현재 액세스 상태를 나타내는 3 가지-상태 세마포어를 제공을 포함한다.  3 가지-상태 세마포어에서, 첫번째 상태는 프로세서 코어 외부의 하드웨어가 지정된 메시지 버퍼 내부로 새로운 메시지 데이터를 기록하는 것의 시작을 나타내며, 두번째 상태는 프로세서 코어 외부의 하드웨어가 지정된 메시지 버퍼 내부로 새로운 메시지 데이터를 기록하는 것의 종료를 나타내며, 그리고 세번째 상태는 프로세서 코어가 지정된 메시지 버퍼로부터 메시지 데이터를 판독하는 것의 시작을 나타낸다.  프로세서 코어는 지정된 메시지 버퍼가 세마포어의 현재 상태에 근거하여 액세스될 수 있는지를 결정한다.  지정된 메시지 버퍼가 액세스될 준비가 되어있는 지를 결정한 후, 프로세서 코어는 지정된 메시지 버퍼로부터 메시지 데이터를 판독한다.  프로세서 코어가 지정된 메시지 버퍼로부터 메시지 데이터를 판독하는 것을 종료한 후, 프로세서 코어가 지정된 메시지 버퍼로부터 메시지 데이터를 판독할 동안 다른 상태로 변경되었는 지를 결정하도록 세마포어의 현재 상태를 검사한다.  만약 프로세서 코어가 지정된 메시지 버퍼로부터 메시지 데이터를 판독할 동안 세마포어의 현재 상태가 변경되었다고 프로세서 코어가 결정한다면, 세마포어의 현재 상태에 근거하여지정된 메시지 버퍼가 액세스될 준비가 되어있는 지를 다시 결정한다.  지정된 메시지 버퍼가 액세스될 준비가 되어 있다고 다시 결정한 후, 프로세서 코어는 지정된 메시지 버퍼로부터 메시지 데이터를 다시 판독한다.
Patent KR-20020003203-A (KR)
Title: Case for mobile terminal
IPC: H04B1/38
Filed: 2000-03-06
Abstract: A flexible sheet has a plurality of fasteners which can be fastened together to form an open-cornered enclosure for a mobile terminal, such as a wireless phone. A mid-portion of the flexible sheet has a selectively adjustable length whereby the case can be made larger or smaller to accommodate a variety of differently-sized instruments.
Patent KR-20020005665-A (KR)
IPC: C07D311/66
Filed: 2000-04-07
Abstract: The present invention is directed to novel dipeptide thereof, represented by the general Formula I:where R1-R3, X and Y are defined herein. The present invention also relates to the discovery that compounds having Formula I are potent inhibitors of caspases and apoptotic cell death. Therefore, the inhibitors of this invention can retard or block cell death in a variety of clinical conditions in which the loss of cells, tissues or entire organs occurs.
Patent KR-20020021136-A (KR)
IPC: G03F7/09
Filed: 2000-06-21
Abstract: 본 발명은 2축배향 폴리에스테르필름 및 그 한쪽의 면에 감광성 수지 조성물의 층을 갖는 지지필름으로 이루어지는 감광성 엘리먼트에 있어서, 상기 지지필름의 상기 감광성 수지 조성물층을 형성한 면과는 반대의 면에 미립자를 함유하는 수지층을 갖고, 상기 감광성 수지 조성물이 
     (A) 카르복실기 함유 바인더 폴리머, 
     (B) 분자내에 적어도 1개의 중합가능한 에틸렌성 불포화기를 갖는 광중합성 화합물 및 
     (C) 광중합개시제 
     를 함유하여 이루어지는 감광성 엘리먼트, 감광성 엘리먼트롤, 이것을 사용한 레지스트패턴의 제조법, 레지스트패턴, 레지스트패턴 적층기판, 배선패턴의 제조법 및 배선패턴을 제공한다.
Patent KR-20030060258-A (KR)
Inventor: YOO TAEK YONG
IPC: F01M5/02
Filed: 2002-01-08
Abstract: PURPOSE: An oil filter is provided to reduce a frictional force during the early stage of engine start, while achieving improved fuel efficiency by reducing the load being applied to the engine. CONSTITUTION: An oil filter comprises a filter member(2) arranged in a case(1); an inner wall(3) forming an oil outlet passage(5) at the center of the inside of the filter member, and which has a plurality of holes(4); and a plurality of latent heat accumulation units(10) embedded with a salt(11) for emitting heat when solidified and absorbing heat when liquefied, and which emits heat and accumulates the latent heat by being solidified when the ambient temperature is lower than a predetermined level. The latent heat accumulation units are arranged in the filter member in such a manner that the temperature of the oil which is pumped from an oil pump and passes through the filter member rapidly rises.
Patent KR-20030061169-A (KR)
Title: Multi storage boiler
Inventor: JUNG HEE JUNG
IPC: F24H1/36
Filed: 2002-01-11
Abstract: PURPOSE: A multi-layer boiler is provided to extend the residence of combustion gas and reduce fuel by gradually convecting the circulation of combustion gas from the center of the boiler to the outside. CONSTITUTION: A multi-layer boiler is composed of a boiler(1) mounted with first and second flow-through valves(40,41) and divided into first, second, and third heating tanks(11,21,31) with connecting a water supplying port(60) to the third heating tank, a first heating chamber(10) laid inside each heating tank of the boiler to exhaust combustion gas by thermal convection, second and third heating chambers(20,30) having a plurality of hanging sills(70), and a combustion gas leading port(50) and an exhaust port(61) connected to communicate with each other at the first and third heating chamber.
Patent KR-20020066374-A (KR)
Inventor: YOON JEEN MOK
IPC: F01B3/02
Filed: 2002-01-24
Abstract: PURPOSE: A swash plate engine is provided to allow the engine to be scaled down in size and weight by having a single side support structure. CONSTITUTION: A swash plate engine includes a cylinder block(102) in which a plurality of cylinders(103) are circularly disposed; a plurality of pistons(104); a drive shaft(105) having a straight shaft(106) rotatably installed at a center portion of the cylinder block and a declined shaft(107) extended from an end portion of the straight shaft; a weight(109) formed at a joint portion of the straight shaft and the declined shaft; an oscillating member(110) supported at the declined shaft of the drive shaft; a plurality of rods(112a-d) connecting the pistons to the oscillating member; a pair of bevel gears(114,115) facing each other and respectively formed at the oscillating member and the cylinder block to prevent the oscillating member from rotating; and a plurality of thrust bearing assemblies(120,150) installed at the cylinder block and the oscillating member to support the straight shaft, the weight and the declined shaft.
Patent KR-20030067877-A (KR)
IPC: F28F3/02
Filed: 2002-02-08
Abstract: 열교환기(6)가 적층된 판(70)을 통하여 교차유동하는 두 공기유로(7)(8)에 대한 두개의 유입구(63)(64)와 두개의 유출구(65)(66)를 갖는다. 판(70)은 진공성형되고 각각 인접한 판사이에 다수의 유동채널(73)을 형성하는 지그재그형 벽(72)을 갖는 부분(71)을 갖는다. 판의 변부는 서로 지지되고 두 측판(14)(15)상의 리브(95)사이에 밀폐고정된다. 유입구 및 유출구에서 4개의 그릴(16-19)이 판(70)의 쌍의 변부를 고정하는 요구(99)를 갖는 크로스 바(97)를 가지며, 이 크로스 바는 인접한 쌍의 판사이와 공기유로(7)(8)에 대하여 공기가 유동할 수 있도록 하는 스페이서(98)에 의하여 분리되어 있다.
Patent KR-20030068631-A (KR)
Title: the making method of flocking colths
Inventor: HONG WOONG SUB
IPC: D06C11/00
Filed: 2002-02-15
Abstract: PURPOSE: A manufacturing method of flocking planted fabric which is characterized by showing double colors, having beautiful appearance, having special functionality and having excellent competitiveness is provided. CONSTITUTION: The manufacturing method of the flocking planted fabric is comprised of: unwinding fabric from a roll; coating a surface of the fabric with an adhesive; passing the fabric under a flock hopper; falling piles on the fabric from the flock hopper on uniform density to adhere the piles on a part coated with the adhesive; sucking piles not adhered with a vacuum cleaner; drying the fabric at room temperature for 4-6 hours; and then passing the dried fabric through a chamber having 110-150 deg.C of temperature at 20-25 yards/min of speed to dry the fabric completely and to fix a pile planted part.
Patent KR-20030069507-A (KR)
Title: Booklet finisher of the image forming apparatus
Inventor: JUNG YEON GWAN
IPC: G03G15/00
Filed: 2002-02-21
Abstract: PURPOSE: A device for binding a book of an image forming device is provided to stably support papers discharged from a copier by a grip element driven by a worm gear and a cam. CONSTITUTION: A bookbinding position setting device(88) includes a jogger(61) movable by a sliding element, and a paper grip element(33) installed at the jogger. The paper grip element includes a cam element(20), a return spring(31), and a grip plate(30) having a paper grip part. The grip plate is pushed up to an upper position by rotation of the cam element while descending by the weight of the grip plate and the return spring. Papers are gripped between the paper grip part of the descended grip plate and the jogger.
Patent KR-20030069533-A (KR)
Title: One body structure of a sound device and vibration motor for communication machine
Inventor: KIM HUI SEUNG
IPC: H04B1/38
Filed: 2002-02-21
Abstract: PURPOSE: A combined structure of a sound system and a vibrating motor for communication equipment is provided to combine the sound system with the vibrating motor in axis direction, and to selectively operate the combined sound system and the vibrating motor, then to configure the system and the motor in modules, thereby implementing miniaturization and compactness as reducing a manufacturing process. CONSTITUTION: A magnetic circuit is formed. A ring-shaped coil(6), a plate(4), and a permanent magnet(3) are fixed into a vibrating plate(5) of a sound system(100) on the magnetic circuit. A ring-shaped magnet(12) and a magnetic circuit of a rotor(16) are formed. The ring-shaped magnet(12) is fixed into a bracket(11) of a vibrating motor(200). An external side of a yoke(2) is configured in cylinder type so as to play a case role for protecting inside of the vibrating motor(200). The yoke(2) of the sound system(100) has a projection(7) by directly molding a predetermined part of the yoke(2) in order to form a magnetic closed circuit consisting of the permanent magnet(3), the plate(4), and the ring-shaped coil(6).
Patent KR-20030069682-A (KR)
Title: Lubricant composition
Inventor: YOO SEONG CHUN
IPC: C10M137/12
Filed: 2002-02-22
Abstract: PURPOSE: Provided is a lubricating oil composition which is suitable for continuously variable transmission requiring driving power transmit performance and speed change performance. CONSTITUTION: The lubricating oil composition comprises a base oil comprising a mixture of a mineral oil and a synthetic oil in a mixing ratio of 6:4; 2 to 5 % by weight of a fatty acid and a sulfur compound; 1 to 3 % by weight of a fatty acid and phosphorus compound; 2 to 5 % by weight of zinc dithiophosphate; 1 to 3 % by weight of calcium sulfonate; and 1 to 3 % by weight of magnesium dinonylnaphthalene sulfide. The lubricating oil composition increases the absolute value of friction index while maintaining the ratio of dynamic friction index to static friction index.
Patent KR-20030071085-A (KR)
Title: An apparatus for dispensing liquid crystal and a method of controlling liquid crystal dropping amount
Inventor: KWON HYEOK JIN
IPC: G02F1/1341
Filed: 2002-02-27
Abstract: PURPOSE: A liquid crystal dispensing apparatus and a method for controlling the quantity of dispensed liquid crystal are provided to directly dispense liquid crystal on a large-size glass substrate including at least one liquid crystal panel. CONSTITUTION: A liquid crystal dispensing apparatus includes a liquid crystal dispenser(120), a power supply(150), a gas supply(152), and a main controller(160). The liquid crystal dispenser is filled with liquid crystal and supplied with a gas to dispense liquid crystal on a substrate on which at least one liquid crystal panel is formed through a nozzle according to pressure of the gas. A needle of the dispenser is moved up and down according to magnetic force of a solenoid coil and tension of a spring so that a vent connected to the nozzle is open or closed to control the quantity of the dispensing liquid crystal. The power supply supplies power to the solenoid coil. The gas supply provides the gas to the dispenser. The main controller calculates the quantity of dispensing liquid crystal and controls the power supply and gas supply to dispense the liquid crystal as much as the calculated quantity of dispensing liquid crystal on the substrate.
Patent KR-20030071331-A (KR)
Title: An Apparatus for monitoring PC display
Inventor: YOO JE KUN
IPC: G06F3/14
Filed: 2002-02-28
Abstract: PURPOSE: A screen monitoring system is provided to capture image signals, transmitted from a main body of a PC to a monitor, outside the main body of the PC, and to store or regenerate the captured image signals. CONSTITUTION: The system comprises the first connector(21), an AD converter(22), a signal processing and storage module(25), a DA converter(26), a switch(27), the second connector(28), and a controller(24). The first connector(21), combined with a VGA(Video Graphics Array) card and physically locking at the card, captures analog image signals output by the VGA card and transmits the analog image signals to the AD converter(22) which converts the analog signals into the digital signals. The signal processing and storage module(25) periodically compresses, stores, decompresses and outputs the digital image signals. The DA converter converts the digital image signals into the analog image signals for the VGA card. The switch(27) selectively connects a monitor to the analog image signals from the VGA card or the DA converter(26). The second connector(28), combined with the monitor and physically locking at the monitor, transmits the analog image signals, input by the switch(27), to the monitor. The controller(24) controls the signal processing storage module(25), the first connector(21), and the second connector(28).
Patent KR-20030072483-A (KR)
Inventor: BAE HAK YEON
IPC: H04B17/40
Filed: 2002-03-04
Abstract: PURPOSE: A base station having a jig mode function is provided to selectively use an online mode and a jig mode, thereby performing an RF performance test of a DECT base station or verifying digital part errors without a wireless switching system as enabling a call test with a DECT terminal. CONSTITUTION: An oscillator(50) generates a certain clock. An EPLD(Erasable Programmable Logic Device)(60) receives the generated clock, and generates a specific clock required in a specific chip(70). A base station has a jig mode function operable without inputting an external system clock as supplying the specific clock to the chip(70). The first buffer installed between the EPLD(60) and the specific chip(70) supplies the clock generated in the EPLD(60) to the chip(70) according to the jig mode. The second buffer supplies the external system clock to the chip(70).