baber/WOPTO huggingface dataset:
Patent KR-20010007943-A (KR)
Inventor: RYU JIN HO
IPC: B26D3/00
Filed: 2000-10-26
Abstract: PURPOSE: An automatic cutting machine for metal bars is provided to automatically cut metal bars to a determined size without stop by moving a transfer unit connected with a buffer unit for adjusting the cutting position and machining speed of metal bars as well as a cutting unit for cutting the metal bars on the cutting position of the buffer unit. CONSTITUTION: A buffer unit adjusts the cutting position and machining speed of continuously supplied metal bars. A cutting unit cuts each metal bar on inner blade grooves when the metal bars reaches the cutting position of the buffer unit. A transfer unit connects the buffer unit and cutting unit to an upper rail(2) and a lower rack gear. The transfer unit moves along a roller and rail at the upper both sides of a stand. Therefore, the metal bars are cut to a specific size without stopping.
Patent KR-20020034351-A (KR)
Title: Metal layer of semiconductor device and manufacturing method thereof
Inventor: AHN JONG HYEON
IPC: H01L21/3205
Filed: 2000-11-01
Abstract: PURPOSE: A method for fabricating a metal interconnection of a semiconductor device is provided to prevent the metal interconnection from being lifted by forming a structure of the metal interconnection wherein the width of the lower portion of the metal interconnection is broader than that of the upper portion of the metal interconnection or the width of the intermediate portion of the metal interconnection is broader than those of the upper and lower portions. CONSTITUTION: An interlayer dielectric(102b) is formed on a semiconductor substrate(100). A photoresist pattern defining a metal interconnection region is formed on the interlayer dielectric. A part of the interlayer dielectric is etched to form a shallow trench by using the photoresist pattern as a mask while polymer functioning as a mask regarding an etch process is formed on the sidewall of the trench. The rest of the interlayer dielectric is etched by using the photoresist pattern and the polymer formed on the sidewall of the first trench as a mask. A trench is formed wherein the width of the lower portion of the etched interlayer dielectric is broader than that of the upper portion of the etched interlayer dielectric. The photoresist pattern is eliminated. A barrier layer(108a,110a) is formed along the step difference on the resultant structure. A conductive layer is deposited on the resultant structure. A chemical mechanical polishing(CMP) process is performed regarding the resultant structure to make the conductive layer filled only in the trench of the interlayer dielectric.
Patent KR-20020036594-A (KR)
Inventor: KANG HWA SEOK
IPC: G06F15/02
Filed: 2000-11-10
Abstract: PURPOSE: A PDA(Personal Digital Assistant) and a mobile station in one is provided to transmit/receive the data without using a separate communication device by having a portable telephone function and to enhance the convenience of usage by distributing and arranging a keypad fit to the both hands. CONSTITUTION: The PDA includes a main body(30) having a PDA part(32) and a portable telephone part, and an open/close tool(34) selectively opening the PDA or portable telephone part according to the insertion direction. The open/close tool is formed by a rotation cover(40) rotatably connecting one terminal part to the main body. An LCD and the keypad to execute a PDA function is arranged to the PDA part, and a speaker, a mike and a keypad to execute a telephone function is arranged to the portable telephone part.
Patent KR-20020039007-A (KR)
Title: Method of forming a bit line contact plug using an insulation spacer
Inventor: LIM SEONG SU
IPC: H01L21/283
Filed: 2000-11-20
Abstract: PURPOSE: A method for fabricating a bit line contact plug using an insulation layer spacer is provided to remarkably reduce contact resistance, by basically preventing generation of a negative slope caused by a difference of an etch rate between a word line insulation layer and a gap-fill layer and by controlling a thermal budget of a silicon substrate caused by a heat treatment process performed regarding the gap-fill layer. CONSTITUTION: A part of an insulation layer formed on the silicon substrate(10) having semiconductor elements like a bit line is removed to form a bit line contact. An oxide layer or nitride layer is formed on the resultant structure by a low pressure chemical vapor deposition(LPCVD) process and is blanket-etched. A diffusion barrier metal layer is deposited on the resultant structure. A metal plug layer is deposited on the metal layer, and is blanket-etched to form a contact plug with no void.
Patent KR-20020045708-A (KR)
Inventor: MIN BYUNG EE
IPC: G09F19/22
Filed: 2000-12-09
Abstract: PURPOSE: Provided is a signboard which prevents the generation of condensed water on the surface thereof and consequently removes visual refraction. CONSTITUTION: The signboard preventing the generation of condensed water comprises a large number of grooves in the surface of the signboard; an air-blowing holes in the grooves which remove condensed water generated when the temperature is lowered by blowing the air; an air pump(21); and an operating means which senses the temperature and humidity of the surface of the signboard and supplies the air pump with an operating signal, wherein the letter or sign is displayed between the grooves.
Patent KR-20020046305-A (KR)
Title: Method of multistage interference cancellation for multiuser detection
Inventor: HONG DAE SIK
IPC: H04B1/7105
Filed: 2000-12-12
Abstract: PURPOSE: A multi-stage interference cancellation method for multi-user reception is provided to increase multi-user capacity by canceling an interference by multi-user access through an interference cancellation technique. CONSTITUTION: An interference cancellation system estimates the maximum eigenvalue or minimum eigenvalue of a matrix that a constant matrix is subtracted from a user's active code correlation matrix(401). The system receives a signal passed through a despreader and a matched filter(402) and approximates an eigenvalue existing between the maximum eigenvalue and the minimum eigenvalue(403). The system normalizes the output value of each stage in order to obtain the weight variable of each state through the approximated variable(404). If a received signal(r(t)) is supplied from the external, the system takes the output value of a signal before filtering and determination as an initial value and obtains the output value of the first stage. Then, using the linear sum of more than two temporary judgement signals obtained from stages previous to the first stage, the system measures the final user signal(406).
Patent KR-20020047794-A (KR)
Title: Vibrator of ultrasonic motor
Inventor: KIM MYEONG HO
IPC: H02N2/02
Filed: 2000-12-14
Abstract: PURPOSE: An oscillator of ultrasonic wave linear motor is provided to improve an efficiency of an ultrasonic wave linear motor by increasing an oscillation of an oscillating body in a moving direction of a slide under a low current and a low voltage. CONSTITUTION: An oscillating body(101) which is formed in length direction is combined with a plurality of leg unit(105). A leading phase frequency and a lagging phase frequency are permitted with a 90 degree difference in correspondence with each other to a twin of piezoelectric ceramics(102) which are adhered to the oscillating body(101) in correspondence with each other.
Patent KR-20020049533-A (KR)
Title: Mounting structure for moter of a window regulator
Inventor: LEE JUN U
IPC: B60J1/00
Filed: 2000-12-19
Abstract: PURPOSE: A driving motor coupling structure of a window regulator is provided to cut off vibration of a driving motor when operating a window regulator by preventing mutual interference of a door inner panel and a driving motor. CONSTITUTION: Thread units(10a,10b,10c) of a driving motor(10) is inserted in a coupling hole(1a) of a door inner panel. Nuts(5) are coupled to the thread units penetrating the coupling hole. A rubber bush(7) forming a through hole(7a) is inserted in the coupling hole. The thread units are inserted in the through hole of the rubber bush. Nuts are coupled to the thread units protruded with penetrating the through hole of the rubber bush. Therefore, the vibration of the driving motor isn't transmitted to the door inner panel and noise is controlled.
Patent KR-20020050036-A (KR)
Title: Chemical Vapor Deposition Device
Inventor: JUNG GI HYEON
IPC: H01L21/205
Filed: 2000-12-20
Abstract: PURPOSE: A chemical vapor deposition apparatus is provided to make a mask located in the same position at all times, by installing a guide for guiding an increase or decrease of the mask on a chamber in which the mask is positioned when the mask repeatedly increases or decreases as a substrate increases or decreases. CONSTITUTION: A susceptor(25) applies heat to the substrate(27). A lift pin(32) increases the substrate. The mask(33) deposits a deposition material in a predetermined portion on the substrate. The guide prevents the mask from being twisted when the mask increases or decreases. A gas spray hole(29) sprays gas onto the substrate.
Patent KR-20010098379-A (KR)
Title: 고정자 베인 세그먼트 및 터빈 베인 세그먼트
IPC: F01D5/14
Filed: 2000-12-22
Abstract: 터빈 고정자 베인 세그먼트는 반경방향 내벽 및 외벽을 구비하고 있고, 이들 사이에서 베인이 연장한다.  내벽 및 외벽은 분할되고 충돌판을 갖추고 있다.  외벽 공간 내로 유동하는 증기는 외벽 상부면을 충돌 냉각시키기 위해 충돌판을 통과한다.  소모된 충돌 증기는 베인의 벽을 충돌 냉각시키기 위한 삽입부를 갖춘 베인의 공동 내로 유동한다.  스템은 내벽 표면을 충돌 냉각시키기 위한 충돌판을 통해 내벽으로 이송되고, 베인의 표면을 충돌 냉각시키기 위해 삽입부를 갖춘 회수 공동을 통해 회수된다.  적어도 하나의 필름 냉각 구멍이 공동의 내측과 베인의 외측 사이를 유체 연통시키도록 공동 중 적어도 하나의 벽을 통해 형성된다.  필름 냉각 구멍은 잠재적으로 낮은 저 사이클 피로(LCF) 수명 영역 부근에 형성되어서, 필름 냉각 구멍을 통해 흘려나오는 냉각 매체가 저 LCF 수명 영역 주변의 열구배를 감소시킴으로써, 그 영역의 LCF 수명을 증가시킨다.
Patent KR-20020051802-A (KR)
Inventor: JEAN JONG SIG
IPC: B65D71/00
Filed: 2000-12-23
Abstract: PURPOSE: Provided is a hand carry basket for the delivery of strawberry, which is strong and practical, saving time and labor for the farmers. CONSTITUTION: The device comprises: two circular frames of 4mm, 8K steel wire with 30cm diameter to put the basket with strawberry; a supporting steel wire of 6mm, 8K for connection of the above two circular frames; a supporting steel wire of 6mm, 8K to balance the baskets and prevent their fall; a stream-line shape of supporting steel wire of 6mm, 8K for the handle; a supporting steel rod of 6mm, 8K to prevent the outside slag of both circular frame when baskets are in; and a central rod which holds the above support rod, while all the connections being welded for strength.
Patent KR-20020052845-A (KR)
Title: Method for fabricating semiconductor device
Inventor: KIM NAM GYEONG
IPC: H01L27/105
Filed: 2000-12-26
Abstract: PURPOSE: A method for manufacturing a semiconductor device is provided to improve electrical properties and the reliability of capacitors by restraining the oxidation of a plug, a diffusion barrier and an ohmic contact layer. CONSTITUTION: A recessed plug(22) is formed in an insulating layer(21) having a contact hole. An ohmic contact layer(23) and a diffusion barrier(24) are sequentially formed on the recessed plug. An IrOx is deposited on the resultant structure. An IrOxNy lower electrode(25b) is formed by a plasma treatment at N2 or NH3 atmosphere. A BLT dielectric film(26) is formed on the IrOxNy lower electrode. An upper electrode is then formed on the BLT dielectric film(26).
Patent KR-20020058669-A (KR)
Inventor: LEE DONG HEON
IPC: B60K17/00
Filed: 2000-12-30
Abstract: PURPOSE: A clutch for an automatic transmission is provided to prevent the increase of fuel consumption due to loss of hydraulic pressure of a holding clutch, and to reduce weight and a manufacturing cost by simplifying a shape and a structure of components. CONSTITUTION: A clutch for an automatic transmission includes a retainer(23), a hub(25), a plate(27), a disc(29), and a piston(31). The retainer is connected to a rotating element to transmit driving power. The hub is provided to the inside of the retainer and connected to another rotating element to transmit driving power. The plate is splined to an inner circumference of the retainer to restrict the transmission of power between the hub and the retainer. The disc is splined to an outer circumference of the hub. The piston is supported on a piston spring to always make the disc and the plate engage each other when hydraulic pressure is not supplied into a piston chamber(35).
Patent KR-20020057193-A (KR)
Title: Method for interface between HLR and SCP
Inventor: LEE YEON CHAN
IPC: H04W76/02
Filed: 2000-12-30
Abstract: PURPOSE: A method for interworking a home location register with a service control point is provided to find out intelligent service SCPs where a subscriber is saved, and the corresponding service by using both an SCP ID and a Service ID as keys. CONSTITUTION: An HLR(Home Location Register) interworks with an SCPs(Service Control Point server)(ST11). It is checked whether the SCP sends a message(ST12). It is checked whether an MSC(Mobile Switching Center) requests a service(ST13). If requests, the corresponding socket_ID is searched from an IP_table with a service_ID transmitted form the MSC(ST14). The message is transmitted to the corresponding socket_ID(ST15). It is checked whether the SCPs requests TCP/IP connection(ST16). If requests, a service_ID and a socket_ID of the corresponding SCPs are stored at the IP_table(ST17). If not request, it is determined whether the message is the service request process result transmitted from the MSC(ST18). If not the service request process result, the message is transmitted to another processor(ST19). If the service request process result, the HLR compares the corresponding message with the IP_table for searching the socket_ID of the corresponding socket_ID(ST20). The message is transmitted to the corresponding SCP by using the searched socket_ID(ST21). The SCPs processes the transmitted message, and retransmits the result to the HLR(ST22). The HLR retransmits the process result to the MSC(ST23).
Patent KR-20020057216-A (KR)
Title: Method for manufacturing organic electroluminescent display
Inventor: KANG JAE IK
IPC: H01L51/52
Filed: 2000-12-30
Abstract: PURPOSE: A method for manufacturing organic EL(Electro-Luminescent) display is provided to remove a process for mixing a spacer with a UV(Ultraviolet) hardening sealant and simplify a manufacturing process of an organic EL display by coating a metal sus cover with a fluoride resin. CONSTITUTION: A first process prepares a jig to locate a metal sus cover(31) which is coated with a fluoride resin. A second process coats the border of the metal sus cover(31) with a sealant. A third process adheres a glass substrate which is patterned with an ITO(Indium Tim Oxide) anode and cathode to the metal sus cover(31) through an intermediation of the sealant. A fourth process performs a UV irradiation to harden the sealant.
Patent KR-20010031080-A (KR)
Title: 레일 차량 시스템
IPC: B61D3/12
Filed: 1998-10-30
Abstract: 본 발명은 연결 보기(connecting bogie)(2) 및, 모듈 구성을 갖는 열차를 형성하기 위해서 상기 연결 보기 상에 위치될 수 있는 공급 유닛(3), 제어 유닛(4) 및 수송 유닛(5)을 포함하는 레일 차량 시스템에 관한 것이다. 연결 보기(2)는 하나에 전기 구동/제동 유닛이 구비되는 두 개 이상의 액슬(axle)을 포함하며, 이들 연결 보기가 클러치와 유사한 방식으로 분리될 수 있도록 구성된다. 공급 유닛(3)은 접촉 라인(contact line)으로부터 전력을 끌어내고 다시 접촉 라인으로 전력을 귀환시키기 위해서 또는 1차 에너지를 전기 에너지로 변환하기 위해서, 집전 장치(current collector), 변압기 및 전력 변환기와 같은 필수 장치를 포함한다. 제어 유닛(4)은 전류와 부하에 독립적으로 구성될 수 있다. 수송 유닛(5)은 승객 또는 화물을 운송하기 위한 것인지 및 운송될 화물의 유형에 따라서 달라진다. 모든 유닛(3, 4, 5)의 접속부(interface)는 일정하며, 상기 유닛(3, 4, 5)이 신속하고 수월하게 교환될 수 있도록 구성된다. 최종적으로 기능 유닛으로 열차가 일치되게 구분되는 것은 구동 동력이 부하에 보다 적합하게 되는 것을 가능케 하며, 에너지를 발생시키고 사용할 수 있는 가능성을 야기하며, 마모와 운영/유지보수 비용을 감소시킨다.
Patent KR-20010033286-A (KR)
Title: 석영 유리관의 제조시에 맨드릴을 제거하기 위한 방법 및장치
IPC: C03B37/014
Filed: 1999-11-02
Abstract: 다공성 SiO₂블랭크가 종축을 중심으로 회전하는 맨드릴의 실린더 케이싱 표면상에 SiO₂입자들을 석출시킴으로써 형성되고, 이어서 상기 맨드릴이 제거되고 블랭크가 소결되는, 합성 석영 유리관을 제조하기 위한 방법이 공지된다.    이것을 기초로, 저가의 실린더 맨드릴의 사용을 용이하게 하는 석영 유리관을 제조하기 위한 저가의 방법을 구체화할 수 있게 하기 위하여, 본 발명에 따라, 맨드릴(22)을 제거하기 위해, 연성물질의 접합부(13) 및 통로(15)를 포함하는 픽업(11)에 상기 블랭크(6)의 전방쪽 일단부(25)가 고정되고, 견인력 또는 추력이 맨드릴의 종축(23) 방향으로 맨드릴(22)에 작용하기 때문에, 상기 블랭크(6)의 단부(25)가 상기 접합부(13)쪽으로 가압되고, 상기 맨드릴(22)이 상기 블랭크(6)로부터 분리될때까지 상기 힘이 계속적으로 증가되는 방법이 제안된다.    또한, 맨드릴을 블랭크로부터 제거하기 위한 적절한 장치가 구체화되는데, 이 장치는 블랭크(6)의 고정 및 정렬을 위한 고정 장치(11; 17)로서, 상기 블랭크(6)의 일단부(25)를 고정하기 위한 픽업(11)으로 구성되며, 이 픽업(11)에는 연성물질로 만들어진 접합부(13) 및, 맨드릴(22)이 통과하여 연장하는 통로(15)가 포함되고, 견인장치 및 추력장치(5)가 맨드릴의 종축(23) 방향으로 효과가 있도록 작용하여, 이로 인해 맨드릴(22)과 연결된 블랭크(6)의 단부(25)가 접합부(13)쪽으로 이동가능하다.
Patent KR-20010033300-A (KR)
Title: 분기 예측의 형태를 분류하기위해 복귀 선택 비트들을이용하는 분기 예측
IPC: G06F9/38
Filed: 1998-06-10
Abstract: 분기 예측 유닛은 명령캐시에 저장된 일련의 명령 바이트들 집단 각각에 대응하는 분기 선택기들의 세트를 저장한다. 만일 분기 선택기에 대응하는 패치 주소가 나타나면 각 분기 선택기는 선택 되기 위한 분기 예측을 식별한다. 상기 분기 예측 유닛은 추가적으로 하나 이상의 분기 예측들에 해당하는 복귀 선택기들의 세트를 저장한다. 상기 복귀 선택기들은 상기 분기 선택의 종류를 식별한다. 예를들어 상기 분기 예측들은 순차적인 분기 예측과 분기 명령 분기 예측을 포함할 수 있다. 상기 복귀 선택기들은 상기 분기 명령 분기 예측이 복귀 명령과 결합하는지 혹은 복귀하지 않는 분기 명령과 결합하는 지를 식별할 수 있다.
Patent KR-20010042084-A (KR)
Title: 살생물성 벤질비페닐 유도체
IPC: C07C/
Filed: 1999-03-25
Abstract: 본 발명은 살생물 성질을 갖는 화학식(I)의 화합물, 그의 입체화학적 이성체 형태, 그의 산 또는 염기 부가염, 그의 N-옥사이드, 또는 그의 4급 암모늄 유도체, 그의 제조법, 그를 함유하는 조성물 및 살생물제로서의 용도에 관한 것이다: 
     
       
     
     상기 식에서, 
     점선은 임의의 결합이고; 
     X는 점선이 결합을 나타낼때 직접 결합이거나, 
     점선이 결합을 나타내지 않을때, 수소 또는 하이드록시이며, 
     R 1 , R 2 , R 5 및 R 6 는 각각 독립적으로 수소, 할로, 하이드록시, C 1-4 알킬, C 1-4 알킬옥시, -SO 3 H등으로 구성된 그룹으로부터 선택되고; 
     R 3 및 R 4 는 각각 독립적으로 수소, 할로, 하이드록시, C 1-4 알킬, C 1-4 알킬옥시, 니트로, 아미노, 시아노, 트리플루오로메틸, 또는 트리플루오로메톡시로 구성된 그룹으로부터 선택되며; 
       은 하기 화학식의 
     
       
     
     
       
     
     
       
     
     
       
     
     
       
     
     의 라디칼이며; 
     여기에서, 
     A 1 은 직접 결합 또는 C 1-6 알칸디일이고; 
     A 2 는 C 2-6 알칸디일이며; 
     R 7 내지 R 11 은 수소, C 1-6 알킬, 아미노C 1-6 알킬등이다.
Patent KR-20010052294-A (KR)
Title: 라디오 수신기용 제어장치
IPC: H04B1/38
Filed: 1999-04-30
Abstract: 제어장치는 목표 수신기에 의해 현재 수신된 주파수로 외부 혹은 보조 입력신호를 자동 튜닝 처리할 수 있다. 
     따라서, 제어장치는 목표 수신기로부터 나온 노이즈를 이용하여 목표 수신기에 의해 수신되는 주파수로 보조신호를 튜닝처리한다. 
     노이즈는 목표 수신 주파수의 한 성분을 함유하는 출력신호를 제공할 수 있도록 보조신호를 수용할 변조된 신호와 혼합된다.
Patent KR-20010015921-A (KR)
IPC: H01F27/29
Filed: 2000-03-15
Abstract: A high current, low profile inductor (IHLP) includes a conductive coil molded within an inductor body substantially free from ferrite materials and comprising powdered iron materials. The method comprises pressure molding the inductor body substantially free from ferrite materials and comprising a powdered magnetic material within the hollow core of the coil and completely around the coil so that the magnetic material is substantially free from voids therein without shorting out the coil.
Patent KR-20020059472-A (KR)
Title: Adapter for mounting oil cleaner to engine block
Inventor: LEE MYEONG YEOP
IPC: B01D35/30
Filed: 2001-01-06
Abstract: PURPOSE: An adaptor is provided to mount oil cleaners of different shape by connecting to an engine block directly. CONSTITUTION: An adaptor for mounting an oil cleaner comprises a first outlet port(14) to inlet boss of engine block in the first face(11). A first inlet port(16) is formed to surround the first outlet port(14) to communicate with the outlet passage of the engine block. A second outlet port(18) is connected to the first inlet port in the second face(12) opposite to the first face, and is connected to the inlet port of the oil cleaner. A second inlet port(20) is connected to the first outlet port in the second face, and connected to the outlet port of the oil cleaner.
Patent KR-20010085291-A (KR)
Inventor: AKHRAS AMER WAHID
IPC: G06F19/00
Filed: 2001-01-16
Abstract: PURPOSE: A method for predicting flammability limits of complex mixtures is provided to use a neural network as a model for predicting the inflammation limit of a compound chemical mixture. CONSTITUTION: The method comprising training data from the critical variables of each structural groups, the critical variables comprising compositional and thermochemical data from each of the structural groups to produce a neural network model, testing the trained data from the neural network model and validating the trained and tested data from the neural network to accurately predict the flammability limit of an analogous complex mixture having similar structural groups.
Patent KR-20020063053-A (KR)
Title: drive control method and electromotive wheel chair
Inventor: SHIN GYU JAE
IPC: A61G5/10
Filed: 2001-01-26
Abstract: PURPOSE: A motor-operated wheel chair and method for controlling operation of wheel chair is provided to allow the wheel chair to be easily mounted to the motor vehicle by reducing the size of wheel chair, while permitting the wheel chair to smoothly travel regardless of the road condition. CONSTITUTION: A motor-operated wheel chair comprises a driving unit(10) having drive motors arranged for each wheel so as to generate a rotating force to the wheel, wherein the driving unit is connected to the output side of drive motors; a wheel rotating unit(30) for transmitting a mechanical power to the wheel; a variable speed control unit for providing comfort to the user of the wheel chair; a micro computer control unit(40) having a self-diagnosis function; a handle(60) for simultaneously controlling speed and direction of the wheel chair; a display panel(80) having a speed indicator, a mileage indicator, a battery charged amount indicator, a direction lamp and a brake lamp; and a battery(91) for power supply, a signal alarm, a direction lamp(92) and a brake lamp(93).
Patent KR-20010044304-A (KR)
Inventor: LEE BONG KYO
IPC: A61B5/02
Filed: 2001-02-02
Abstract: PURPOSE: A piezoelectric sensor for a velocity pulse wave and an acceleration pulse wave detection system and its manufacturing method are provided to enhance the piezoelectric sensitivity. CONSTITUTION: The piezoelectric sensor(1) comprises a disc type piezoelectric component(10) having a hole on its center position, a pressure region(20) having support protrusions(40) formed on the inner circle boundary of the piezoelectric component, and a pressure receiving region(30) having support protrusions(41) formed on the outer circle boundary of the piezoelectric component. The manufacturing method includes the steps of penetrating a hole on the piezoelectric component, penetrating a hole on the pressure receive region with the same diameter of the hole of the piezoelectric component, forming a concave groove on the pressure region, forming the six reference protrusions on the outer side of the pressure region or the pressure receive region, inserting the center rod having the same diameter of the concave groove into the pressure receive region, gluing the support protrusions of the pressure receive region, inserting the piezoelectric component onto the center rod to connect the pressure receive region and the piezoelectric component, gluing the support protrusions of the pressure region, inserting the piezoelectric component onto the center rod to connect the pressure region and the piezoelectric component, and removing the center rod from the piezoelectric sensor.
Patent KR-20020025633-A (KR)
Inventor: IKATA OSAMU
IPC: H03H9/64
Filed: 2001-02-19
Abstract: PURPOSE: The surface acoustic wave resonator and surface acoustic wave filter using the same are provided, which realizes acoustic wave filter with higher angle ratio than conventional filters, by making the resonant frequency closer to the antiresonant frequency in a surface acoustic wave resonator. CONSTITUTION: The surface acoustic wave resonator comprises a piezoelectric substrate, a interdigital transducer part(2) formed on a piezoelectric substrate and composed of plural electrode fingers(3-4) having a period(pi) that is substantially equal to a wavelength of a surface acoustic wave to be excited, and at least one reflector(3-1,3-2) arranged in the vicinity of the interdigital transducer part(2) to reflect the surface acoustic wave excited by the interdigital transducer part in a direction parallel to a propagation direction of the surface acoustic wave. The interdigital transducer part(2) has three or more electrode fingers within the period(pi). The reflector(3-1,3-2) is composed of plural gratings having a period(pr) that is equal to a half of a wavelength of a surface acoustic wave propagating in the reflector.