baber/WOPTO huggingface dataset:
Patent KR-20020052391-A (KR)
Title: Method for judging a lower part of furnace on the ground of coke grain size
Inventor: BAE GEUN SANG
IPC: C21B7/24
Filed: 2000-12-26
Abstract: PURPOSE: A method for judging inactivity in the lower part of a blast furnace by coke grain size is provided which obtains average coke grain size of tuyere level and dead man cleaning index, and indirectly judges liquid permeability and inactivity index through the obtained average coke grain size and dead man cleaning index. CONSTITUTION: The method for judging inactivity in the lower part of a blast furnace by coke grain size comprises a first step of detecting average grain size of charging coke, cold rolling strength, hot rolling strength, residence time of coke in a blast furnace and coke ratio, and detecting temperature of molten iron, theoretical flame temperature (Tf), £C|, £Si|, £P|, £S| and £Mn| in molten iron, and basicity, (SiO2), (CaO), (Al2O3) and (MgO) in slag respectively; a second step of obtaining average grain size of tuyere level coke based on the average grain size of charging coke, cold rolling strength, hot rolling strength, residence time of coke in a blast furnace and coke ratio detected in the first step, and obtaining a dead man cleaning index using the temperature of molten iron, theoretical flame temperature (Tf), £C|, £Si|, £P|, £S| and £Mn| in molten iron, and basicity, (SiO2), (CaO), (Al2O3) and (MgO) in slag; and a third step of judging liquid permeability and inactivity by the average grain size of tuyere level coke and dead man cleaning index obtained in the second step.
Patent KR-20020055638-A (KR)
Title: Stay locking structure for a head rest of an automobile
Inventor: YANG HYEON NAM
IPC: B60N2/48
Filed: 2000-12-29
Abstract: PURPOSE: A structure for locking a head rest stay for a seat is provided to reduce an interval and to manufacture the head rest stay to meet European head rest height standard by locking and unlocking the stay at a lower end of a body supporting the stay. CONSTITUTION: A structure for locking a head rest stay for a seat includes a pair of beam type tubes(30), a body(40), an operating body, a spring part(60) and a button(70). The beam type tubes are vertically mounted on a back frame(11) of a seat back(10). The body is inserted into the tube and supports a stay(21). The operating body has both side surfaces hinged on an outer circumference of the body, a lower connection part(52) connecting the side surfaces is inserted through a lower portion of the body and contacted to an outer circumference of the stay. The operating body is selectively caught to a hole of the stay. The spring part is mounted on a lower portion of the body and pressurizes the connection part. The button locks and unlocks the stay by selectively pressurizing both ends of the operating part to an operating plate.
Patent KR-20010022320-A (KR)
Title: 절삭날을 라운딩하는 방법 및 장치
IPC: B24B3/00
Filed: 1998-07-14
Abstract: 절삭날을 날카롭게 하는 작업에 후속하는 기계가공 작업동안의 절삭날의 품질저하를 감소시키기 위한 공구의 절삭날을 처리하는 방법.  복수개의 강모를 가진 브러시는 회전축 주위를 돌면서, 절삭날에 대하여 위치를 가지는데, 브러시 축은 절삭날에 대하여 수직하거나 수직한 방향에 대하여 ±20도 정도 범위내의 각도를 가진다.  그런 후에, 브러시는 연마재료의 존재하에서 절삭공구와 접촉하게 된다.  절삭공구는 절삭날이 절삭 블레이드의 전방면과 절삭측 윤곽면의 교선에 의해 형성되는 있는, 기어 등과 같은 치형물품의 절삭을 위한 절삭 블레이드인 것이 바람직하다.  회전 브러시는 절삭날의 라운딩을 가져오는 한편, 절삭날에 인접한 전방면과 절삭측 윤곽면의 일부를 효과적으로 폴리싱한다.
Patent KR-20010024064-A (KR)
Title: 아디픽산의 생산에 있어 시클로헥산으로부터 초산을제거하는 방법 및 장치
IPC: C07C55/14
Filed: 1998-09-14
Abstract: 이 발명은 부가적인 시클로헥산의 도입에 의해 침전되는 촉매를 재순환시킨 후에, 시클로헥산을 아디픽산으로 직접 산화하는 과정에서 시클로헥산으로부터 초산을 제거하는 방법 및 장치에 관한 것이다. 초산의 제거는 1 ~ 3단의 추출기들에서 다소 소량의 세척수로 바람직하게 행해진다. 2단 반응기가 보다 효과적인 것으로 바람직하다.
Patent KR-20010034210-A (KR)
Title: 저부류연형 궐련
IPC: A24D1/02
Filed: 1999-01-19
Abstract: 저부류연형 궐련은, 충전 살담배(5)를 감싸는 2중 구조의 래퍼를 가지며, 그 래퍼 중 내측 래퍼(6)는 초지 시트 담배 또는 슬러리 시트 담배로 이루어지며, 외측 래퍼(8)는 통상의 권지이다. 내측 래퍼(6)가 슬러리 시트 담배인 경우, 내측 래퍼(6)는 그 평활면을 충전살담배(5) 쪽으로 위치시켜 충전 살담배(5)를 감싼다.
Patent KR-20010040822-A (KR)
Title: 분지상 실록산/실알킬렌 공중합체, 실리콘-함유 유기중합체, 및 그의 제조방법
IPC: C07F7/18
Filed: 1998-12-11
Abstract: 본 발명은 하기 화학식 1의 라디칼 중합가능한 유기기를 함유하는 분지상 실록산/실알킬렌 공중합체, 이 공중합체를 중합하여 이루어진 실리콘-함유 유기 중합체 및 그의 제조방법에 관한 것이다: 
     화학식 1 
     
       
     
     상기 식에서, 
     Y는 라디칼 중합가능한 유기기이고, 
     R 1 은 탄소원자수 1 내지 10의 알킬기 또는 아릴기이고, 
     X 1 은 i=1로 했을 경우의 하기 화학식 2의 실릴알킬기이다: 
     화학식 2 
     
       
     
     상기 식에서, 
     R 1 은 상기와 동일하며, 
     R 2 는 탄소원자수 2 내지 10의 알킬렌기이고, 
     R 3 은 탄소원자수 1 내지 10의 알킬기이며, 
     X i+1 은 수소 원자, 탄소원자수 1 내지 10의 알킬기, 아릴기 및 상기 실릴알킬기로 이루어진 군에서 선택되는 기이고, 
     i는 상기 실릴알킬기의 계층을 나타내고 있는 1 내지 10의 정수이며, 
     a i 는 0 내지 3의 정수이다.
Patent KR-20010041116-A (KR)
Title: 자기디스크장치
IPC: G11B5/012
Filed: 1998-03-04
Abstract: 기록용소자는, 자기디스크의 자성층의 자화를 반전시키는 자속을 통과시킬 목적으로 일정의 단면적을 필요로 하지만, 자극의 단면형상이 어스팩트비가 큰 구조로 되면 자극은 효과적으로 자속을 통과시키지 않게 된다. 이 현상이 자극의 트랙폭 치수의 하한이 되며, 트랙밀도를 높일 수 없다. 본 발명은, 이러한 제한을 트랙피치보다도 기록소자폭을 넓게 하여 자성층의 자화를 반전시키는 데에 충분한 기록자계강도를 확보해 두고, 이 기록소자를 구비하는 기록헤드를 겹치지 않게 하면서 기록을 행함으로써, 기록소자폭보다도 트랙폭을 좁게 한 대용량의 자기디스크장치를 실현했다.
Patent KR-20010043300-A (KR)
Title: 플라즈마 에칭 방법
IPC: H01L21/302
Filed: 1999-04-16
Abstract: 실리콘 산화물의 절연막(31)의 상면으로부터, 절연막(31)내에 설치된 깊은 위치의 배선층(33a) 및 얕은 위치의 배선층(33b)에 도달하도록 각각 콘택트 홀(36a, 36b)을 플라즈마 에칭에 의해 형성한다.  C 4 F 8 , CO, Ar을 포함하는 처리 가스를 사용하여, 처리 압력을 30 내지 60mTorr로 설정함과 동시에 C 4 F 8 가스의 분압을 0.07 내지 0.35mTorr로 설정한다.  이 조건하에서 처리 가스를 플라즈마화하고, 이 플라즈마를 사용하여 절연막(31)을 에칭함으로써, 콘택트 홀(36a, 36b)을 형성한다.
Patent KR-20010078751-A (KR)
Title: 마스크로 구성 가능한 스마트 파워 회로－그의애플리케이션과 게이트 시프트된 ｎｍｏｓ 소자
IPC: H01L29/423
Filed: 2000-04-28
Abstract: 본 발명은 파워 제어 블록(power control blocks)이 요구하는 일반적인 기능을 구현하는데 적절한 매트릭스 배열(matrix arrangements)에 있어서 독특한 NMOS 셀형(cell type)에 기초한 어레이를 이용하는 스마트 파워 설계(Smart Power designs)에 관한 것이다.  이것은 어떠한 추가적인 처리 단계 없이, 디지털 집적 회로를 지향하는 표준 CMOS 기술을 이용하는 스마트 파워에 대하여 손쉽게 산업적으로 구현할 수 있는 저비용 세미커스텀(semicustom) 설계와 새로운 IC 설계 전략을 가능하게 한다.  또한 빠른 원형 설계(fast prototyping)를 위해, 동일한 방법론을 정교한 스마트 파워 기술에 적용할 수 있다.
Patent KR-20020066580-A (KR)
Title: Leadframe of die pad and method for manufacturing the same
Inventor: JANG SEONG SIK
IPC: H01L23/495
Filed: 2001-02-12
Abstract: PURPOSE: A chip mounting plate structure of a lead frame is provided to separate a power ring region and a ground ring region by fixing a number of metal parts without an electrical short. CONSTITUTION: A non-conductive epoxy resin(16) is deposited on a center portion of a chip mounting plate(10) of a lead frame. A first metal part(14) is fixed on the center of the non-conductive epoxy resin(16), and a second metal part(12) is respectively separated with the first metal part(14) at regular intervals. A silver-plated part(20) is formed around the edge portion of the chip mounting plate(10) and the other region of the chip mounting plate(10) without the non-conductive epoxy resin(16).
Patent KR-20020071094-A (KR)
Title: Door device of vending machine
Inventor: ISHIKAWA SATOSHI
IPC: G07F9/00
Filed: 2001-03-03
Abstract: PURPOSE: A door apparatus of a vending machine is provided which cleans the inside of a door easily and also opens/closes the door smoothly. CONSTITUTION: Two door bodies(10) open/close an open aperture of a front side of a vending machine body. Two moving members(13) are embedded in two door bodies respectively. And a guide rail is installed in the vending machine body slides two door bodies between a close position of closing the open aperture of the vending machine body and an open position of opening the open aperture of the vending machine body and an inside end opening position of opening the inside end of the door body. The guide rail comprises a main rail part(14a) and a sloped rail part(14c) and a cross rail part(14b).
Patent KR-20020072745-A (KR)
Inventor: PARK BYOUNG SUN
IPC: F03B17/04
Filed: 2001-03-12
Abstract: PURPOSE: A generator using hydraulic pressure is provided to continuously generate electrical energy by converting rotary motive energy into the electrical energy by using the hydraulic pressure. CONSTITUTION: A generator using hydraulic pressure is composed of a rotary motive energy generating unit(12) for generating rotary motive energy by the hydraulic pressure, a pump(11) for generating the hydraulic pressure, and an electrical energy generating unit(13) connected to a rotary shaft.
Patent KR-20010090510-A (KR)
Inventor: HARTMANN MICHAEL
IPC: C12N15/09
Filed: 2001-03-22
Abstract: PURPOSE: Provided are nucleotide sequences encoding the dapC gene and a process for the fermentative production of L-lysine, using coryneform bacteria in which the dapC gene (N-succinylaminoketopimelate transaminase gene) is enhanced, in particular over-expressed. CONSTITUTION: The isolated polynucleotide contains a polynucleotide sequence selected from the group consisting of a) a polynucleotide which is at least 70% identical to a polynucleotide which encodes a polypeptide containing the amino acid sequence of SEQ ID NO: 2; b) a polynucleotide which encodes a polypeptide which contains an amino acid sequence which is at least 70% identical to the amino acid sequence of SEQ ID NO: 2; c) a polynucleotide which is complementary to the polynucleotides of a) or b); and d) a polynucleotide containing at least 15 successive nucleotides of the polynucleotide sequences of a), b) or c).
Patent KR-20010067780-A (KR)
Title: jet nozzle
Inventor: LEE DEOK SIN
IPC: B05B1/16
Filed: 2001-03-23
Abstract: PURPOSE: Provided is a spray machine to control the air and mortar supply by operating a switch for opening and closing a spray hole and to prevent a loss of materials by controlling the amount of spraying according to each material. CONSTITUTION: Main bodies(18,20) includes a pressure pump to provide mortar, a supply pathway(4) connected to the pressure pump and a spraying hole(6) connected to the supply pathway(4). Air spraying nozzles(26,28) are connected to an air pump and equipped to slide forward and backward the main bodies(18,20) for placing an end in the supply pathway(4). An air cylinder(14) is connected to the air pump and equipped on the main bodies(18,20) for sliding the air spraying nozzles(26,28) to slide forward and backward. A separator(16) is installed among the air pump, the air cylinder(14) and the air spraying nozzles(26,28) to control the flow of air supplied from the air spraying nozzles(26,28) and the air cylinder(14).
Patent KR-20020076541-A (KR)
Inventor: CHO YONG SIK
IPC: H01L21/60
Filed: 2001-03-29
Abstract: PURPOSE: A spacer film is provided to prevent the deformation of a tape carrier package and protect the tape carrier package by forming a plurality of projections having a section of trapezoidal shape in a predetermined interval on both edges of a spacer film. CONSTITUTION: A plurality of long projections(22) are formed in a predetermined interval on both edges of a spacer film(20). A bottom area of the projection(22) is larger than an upper area of the projection(22). The bottom area of the projection(22) is formed on a surface of the spacer film(20). The projection(22) of the spacer film(20) is located between a bottom face of an upper tape carrier package and an upper face of a lower tape carrier package. The bottom face of the upper tape carrier package is fixed to an IC region. The projection(22) of the spacer film(20) has a trapezoidal shape. The projection(22) has an empty inside(24).
Patent KR-20020079093-A (KR)
Title: fixation member and assembly method printed circuit board proximity switch
Inventor: HAN YEONG SU
IPC: H01H9/00
Filed: 2001-04-13
Abstract: PURPOSE: A printed circuit board fixing member of a proximate switch and a method for assembling a proximate switch are provided to simplify a printed circuit board assembling process and improve productivity by installing a main PCB(Printed Circuit Board) to the fixing member after fixing a fixing member to a core. CONSTITUTION: A fixing hole(32) is formed on a predetermined section of an upper portion of a cylindrical core(30). A core insertion guide is formed at a lower portion of a fixing member(10). The core insertion guide is inserted into the fixing hole(32). The core insertion guide is fixed to the fixing hole(32) after the core insertion guide is inserted into the fixing hole(32). A main PCB(20) is inserted into a grasping portion of a couple of fixing holes formed on an upper portion of the fixing member(10). A coil is drawn from the cylindrical core(30). The coil is fixed to a particular portion of the PCB(20) by using a soldering method.
Patent KR-20020080680-A (KR)
Title: Artifical broadtail by using pile textiles and its manufacturing method
Inventor: LEE SUNG YEUL
IPC: D03D27/00
Filed: 2001-04-17
Abstract: PURPOSE: Artificial broadtail and a manufacturing method of the artificial broadtail using pile fabric are provided which are characterized by not transforming on washing, being light, having proper thickness, maintaining heat insulating property, having high quality and being useful for a woman's coat. CONSTITUTION: The artificial broadtail is obtained by a process containing the steps of: humidifying the pile fabric with steam; first finishing the pile fabric with a brush to add orientation property to pile; laying cotton and thermal contracting fabric on the bottom of the pile fabric, followed by stitching to unify; and then heating the unified pile fabric on condition of non-tension to contract the thermal contracting fabric, therefore waiting upon a pattern and a shape like natural broadtail.
Patent KR-20020079300-A (KR)
Title: High Density Plasma Source Apparatus and Method
Inventor: KIM JUN TAE
IPC: H05H1/30
Filed: 2001-04-12
Abstract: PURPOSE: A high density plasma source and a generating method thereof are provided to form high density plasma by using RF power of higher frequency and distribute uniformly plasma by using RF power of lower frequency. CONSTITUTION: A high density plasma source is formed with power supply sources(10) of n number, matching networks(20) of n number, and a frequency combiner(30). The power supply sources(10) of n number are used for supplying electric power sources with different frequencies(F1,F2,...,Fn) of n number. A frequency combiner(30) is used for combining RF powers of n number. The frequency combiner(30) is formed by frequency filters(31 to 39) of n number. A high pass filter(31) is used for shielding frequencies of the highest frequency and below. A band pass filter(32) is used for passing frequencies between the lowest frequency and the highest filter. A low pass filter(39) is used for shielding frequencies of the lowest frequency or more.
Patent KR-20010099721-A (KR)
Title: 제어 시스템, 제어 장치, 및 제어 방법
IPC: H04L29/06
Filed: 2001-04-23
Abstract: 제어 장치 및 정보 처리 장치가 소정의 데이터 버스를 통해 서로 접속되어 있는 제어 시스템에 있어서, 제어 장치가 다수의 처리 프로시져들을 생략할 수 있는 제어 시스템, 제어 장치, 및 제어 방법이 제안된다.  제어 장치(20)는 정보 처리 장치(30)에 기억되어 있으며 정보 처리 장치(30)의 기능들을 정의하는 정의 정보에 대응하는 대응 정의 정보를 기억하며, 제어 장치는 정보 처리 장치(30)로부터 정의 정보를 획득하고, 제어 장치(20)는 제어 장치(20)에 기억되어 있으며 획득된 정의 정보에 대응하는 대응 정의 정보에 기초하여 정보 처리 장치(30)의 기능들을 인식하고, 제어 장치(20)는 기능들이 제어 장치(20)에 의해 인식된 정보 처리 장치(30)를 제어해서, 정보 처리 장치(30)를 효율적이고 정확하게 제어할 수 있다.
Patent KR-20020084313-A (KR)
Title: a
Inventor: PARK YOUNG HEE
IPC: A61H33/06
Filed: 2001-04-26
Abstract: PURPOSE: Heat accumulation structure of a heating room for sauna using germanium soil blocks is provided to reduce a maintenance cost of the sauna by continuously keeping a temperature of the sauna room at 50-70deg.C and preventing the loss of heat. CONSTITUTION: In the heating room(1) separately installed with a sauna room, urea form(3) is charged inside a reinforced concrete wall(2), ceramic hot plates(6,6a,6b) are installed between germanium soil blocks(4,5) within the urea form, and ceramic hot plates(7,7') are installed at the center of the urea form to accumulate heat of 300-500deg.C by using late-night electric power and emit far infrared rays.
Patent KR-20020085521-A (KR)
Inventor: HOSOTANI NOBUHIKO
IPC: H01J29/07
Filed: 2001-05-09
Abstract: PURPOSE: A color cathode ray tube having a flat outer face is provided to achieve improved mechanical strength of a shadow mask by changing radius of curvature to a linear shape. CONSTITUTION: A panel(1) has a flat outer surface with an equivalent radius of curvature of 10,000mm or higher in a diagonal axis direction, and a curved inner surface which is formed convex toward the outer surface of the panel. A shadow mask(5) is opposed to the inner surface of the panel, and has an approximately rectangular shape. The radius of curvature of the shadow mask is approximately linearly decreased toward the periphery of the shadow mask rather than the center of the shadow mask. To make the change of radius of curvature caused due to the distance measured from the center of the shadow mask on the diagonal axis, to be approximate to a line by the least square method, the difference between the radius of curvature and the line in each position is kept 100mm or lower.
Patent KR-20020087577-A (KR)
Title: Apparatus for supporting bridge structures
Inventor: KIM YONG CHEOL
IPC: E01D19/04
Filed: 2001-05-14
Abstract: PURPOSE: A bridge seat device is provided to effectively attenuate a relative vibration caused between an upper bridge structure and a lower bridge structure, and to prevent the split between the upper and lower structures while allowing a horizontal movement of the upper structure about the lower structure within a certain range. CONSTITUTION: The bridge seat device comprises an upper bridge structure; a lower bridge structure supporting the upper bridge structure; a pair of supports(30,40); at least one spring member(50) disposed between the upper and lower bridge structures to attenuate a relative vibration caused between the upper and lower bridge structures; and a clamp member(60) for preventing the upper bridge structure being separated from the lower bridge structure while allowing a horizontal movement of the upper bridge structure.
Patent KR-20020089560-A (KR)
Title: Memory address generation apparatus
Inventor: YOO JU HYEON
IPC: G06F17/14
Filed: 2001-05-23
Abstract: PURPOSE: A device for generating a memory address is provided to embody a high speed FFT(Fast Fourier Transform) hardware by providing two memory banks and one butterfly calculation unit, thereby reading and writing a butterfly input/output simultaneously in each clock. CONSTITUTION: Sample RAM bank(510,520) store input/output data of a butterfly calculation. A RAM address generating unit(530) generates an address of the sample RAM bank(510,520). A factor ROM(540) stores a twiddle factor which is a butterfly calculation factor. A ROM address generating unit(550) generates an address of the factor ROM(540). A butterfly calculation unit(560) performs a butterfly calculation by inputting data of the sample RAM bank(510,520) and a factor of the factor ROM(540), and performs a feedback of the calculation value to the sample RAM bank(510,520). A multiplexer(570) selects one out of outputs of the sample RAM bank(510,520) in accordance with a parity value in the RAM address generating unit(530), and outputs the output as the final FFT result data. A controller(580) controls the RAM address generating unit(530) and the ROM address generating unit(550), and controls the entire FFT calculating operations.
Patent KR-20010070684-A (KR)
Title: Traffic signal lamp with fault tolerance
Inventor: KYM YOUM KY
IPC: G08G1/095
Filed: 2001-05-30
Abstract: PURPOSE: A traffic signal lamp with defect resistance is provided which is able to operate normally, even if some light-emitting devices constructing the signal lamp have defects, according to other light-emitting devices without having defects. CONSTITUTION: A traffic signal lamp with defect resistance having light-emitting devices includes at least one display, a plurality of loop forming devices, and a power supply(400). The display is constructed in a manner that multiple light-emitting devices are connected in series to display colors to allow drivers or walkers to recognize the colors. The loop forming devices are connected to the multiple light-emitting devices in parallel to prevent the display from short-circuiting by a light-emitting device having a defect. The power supply discharges remnant current and provides power to the display.
Patent KR-20020094957-A (KR)
Title: Method of manufacturing pmos transistor
Inventor: KWAK NO YEOL
IPC: H01L21/336
Filed: 2001-06-12
Abstract: PURPOSE: A method for manufacturing a PMOS transistor is provided to prevent defects due to fluorine(F) ions of dopants by using a screen oxide layer. CONSTITUTION: A gate electrode(4) having a gate oxide layer(3) is formed on a semiconductor substrate(1). A screen oxide layer is formed on the entire surface of the resultant structure. Then, BF2 ions are implanted by using a photoresist pattern. A P-type LDD(Lightly Doped Drain) region(5) is formed by activating the implanted BF2 ions. After removing the photoresist pattern and the screen oxide layer, a double spacer(6) including an oxide spacer(6a) and a nitride spacer(6b) is formed at both sidewalls of the gate electrode(4). Then, a source and drain region(7) are formed in the substrate by implanting BF2 ions and annealing.
Patent KR-20020096646-A (KR)
Title: Memory managing method in digital TV
Inventor: WOO SEUNG GYUN
IPC: H04N5/44
Filed: 2001-06-21
Abstract: PURPOSE: A method for managing a memory in a digital TV is provided to reduce the size of management data in a variable length memory management by using two bit maps. CONSTITUTION: A method for managing a memory in a digital TV includes the steps of assigning a management memory by setting up the corresponding bit of an area corresponding to the length of the requested memory as 1 as the requested memory length at a first bit map if receiving a request for the memory storing data(S1-S5), and setting up the bit corresponding to a start address of the first bit map as 1 at a second bit map(S6); and returning the management memory by calculating length information of the first bit map of the memory area to be returned if receiving a request to return the memory, changing the bit 1 to 0, which was set at the memory area to be returned in the first bit map, and changing the bit 1 of the second bit map to 0, which corresponded to the start address of the first bit map.
Patent KR-20020001577-A (KR)
Inventor: SHIBATA AKIHIKO
IPC: H03H9/17
Filed: 2001-06-23
Abstract: PURPOSE: A piezoelectric resonator and piezoelectric filter utilizing the same are provided to have a small impedance that is less affected of spurious vibration, and a piezoelectric filter is provided to have a wide pass band that has a small ripple component in the pass band caused by the effect of the spurious vibration of the piezoelectric resonator. CONSTITUTION: A piezoelectric resonator(10) includes a substrate made of Pyrex glass or a material such as a quartz and a vibration section(20), formed on the substrate, provided with a dielectric thin film(14), a couple of electrode thin films(16) and a piezoelectric thin film(18). The electrode thin films(16) are formed at each sides of the piezoelectric thin film(18), and partially disposed through the piezoelectric thin film(18) to thereby form the pair of opposite electrodes(16). The piezoelectric resonator(10) further includes a supporting member for supporting the vibration section(20) which vibrates in an n-th mode of thickness longitudinal vibration or a thickness share vibration applied to the piezoelectric resonator(10). Each of the opposite electrodes(16) has a radius r and the vibration section(20) has a thickness t, wherein the r meet the requirements of r >= 20 t/n.