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51. 发明专利

JPS61205100A PIEZOELECTRIC SOUNDING BODY 失效
公开(公告)号：JPS61205100A
公开(公告)日：1986-09-11
申请号：JP4689785
申请日：1985-03-08
申请人： MURATA MANUFACTURING CO
发明人： OGAWA TOSHIO
IPC分类号： G10K9/122 , H04R17/00
摘要： PURPOSE:To prevent suppression of vibrations by electrical connection and make it possible to accurately obtain desired sound pressure by forming at least one of the electrical connecting parts of connecting the electrodes together by a through-hole formed at a position not suppressing the vibrations. CONSTITUTION:A piezoelectric buzzer 30 is provided with a diaphragm 31 made of metal plate or synthetic resin plate and a laminated ceramic vibrator 32 bonded to the plate 31. The vibrator 32 is formed by sintered bodies obtained by sintering and simultaneous laminating of the electrodes and plural ceramic green sheets. The feature of the buzzer 30 is that the electrical connection between the electrodes of the laminated ceramic vibrator 32 is formed by a through-hole 34a formed in the vicinity of the node of vibrations of the buzzer 30 (shown by the broken line X). Since the through-hole 34a is scarcely moved during vibrations of the buzzer 30 so that the desired sound pressure may be obtained without suppressing the vibrations of the piezoelectric buzzer 30.

52. 发明专利

JPS60145718A CERAMIC FILTER 失效
公开(公告)号：JPS60145718A
公开(公告)日：1985-08-01
申请号：JP236284
申请日：1984-01-09
申请人： MURATA MANUFACTURING CO
发明人： OGAWA TOSHIO
IPC分类号： H03H9/54 , H03H9/56
摘要： PURPOSE:To attain desired pass band characteristics by weighting plural interposed electrodes partially at least. CONSTITUTION:In ceramics 11, interposed electrodes 12a-12j arranged to overlap one another in the thickness direction are formed. Interposed electrodes are made different in length in the transverse direction so that an excitation effective aperture length is varied. External electrodes are formed on right and left end faces of ceramics 11, and ceramics 11 are extended in the thickness direction or the breadthwise direction to constitute another interposed electrode group, and a pair of external electrodes are formed on this interposed electrode group, thus obtaining a filter.

53. 发明专利

JPS60123116A ADJUSTING METHOD OF OSCILLATION FREQUENCY OF PIEZOELECTRIC DEVICE 失效
公开(公告)号：JPS60123116A
公开(公告)日：1985-07-01
申请号：JP23216383
申请日：1983-12-07
申请人： MURATA MANUFACTURING CO
发明人： OGAWA TOSHIO
IPC分类号： H03H3/04 , H03H9/56
摘要： PURPOSE:To adjust a resonance or center frequency accurately and easily by controlling the thicknesses between end faces in the thickness direction of a piezoelectric device and internal electrodes close to these end faces in the state where the piezoelectric device is excited. CONSTITUTION:Plural electrodes which overlap one another in parallel with one another in the thickness direction are arranged on ceramics 3 so that end faces of electrodes 1a-1c are exposed on one face and end faces of electrodes 2a and 2b are exposed to the other face. External electrodes 14 and 15 are formed on electrode exposed faces, and a voltage is applied to polarize ceramics 3. Thereafter, the thicknesses between end faces 17 and 18 in the thickness direction and electrodes 1a and 1c are reduced by working or are increased by applying a damping material, thereby adjusting the resonance frequency.

54. 发明专利

JPS60108372A MANUFACTURE OF HIGH DENSITY OXIDE CERAMIC 失效
公开(公告)号：JPS60108372A
公开(公告)日：1985-06-13
申请号：JP21566383
申请日：1983-11-15
申请人： MURATA MANUFACTURING CO
发明人： OGAWA TOSHIO
IPC分类号： C04B35/64 , C04B35/46 , C04B35/48 , C04B35/49 , C04B35/645 , H01B3/12

55. 发明专利

JPS6074709A PIEZOELECTRIC DEVICE 失效
公开(公告)号：JPS6074709A
公开(公告)日：1985-04-27
申请号：JP18247383
申请日：1983-09-29
申请人： MURATA MANUFACTURING CO
发明人： OGAWA TOSHIO
IPC分类号： H03H9/17 , H03H3/02 , H03H9/36 , H03H9/54 , H03H9/56
摘要： PURPOSE:To suppress spurious radiation based on the primary resonance or other spurious radiation effectively by polarizing adjacent ceramics layers in opposite direction mutually and adopting the structure electrodes at both ends are led out externally. CONSTITUTION:Electrodes 15, 16 are formed on upper and lower faces of a piezoelectric ceramics 11 by removing polarization electrodes 13, 14 formed at left and right faces of the piezoelectric ceramics to which internal electrodes 12a-12e are exposed. Thus, a piezoelectric resonator 17 is obtained. The plural electrodes 12a-12e and 15, 16 arranged so as to be overlapped mutually in the resonator 17 constitute electrode groups and ceramics 11a-11d arranged between the electrodes are polarized in opposite direction mutually. Then the electrodes 15, 16 placed at both ends are so constructed that they are led out externally. Through the constitution above, the vibrating displacement in opposite direction to each other is produced among the electrodes adjacent in broadwise direction, and only the specific vibration corresponding to the thickness of the ceramics layer is excited. Thus, other spurious vibrations are suppressed effectively.

56. 发明专利

JPS6053315A LAMINATED TYPE CERAMIC FILTER 失效
公开(公告)号：JPS6053315A
公开(公告)日：1985-03-27
申请号：JP16242383
申请日：1983-09-02
申请人： MURATA MANUFACTURING CO
发明人： OGAWA TOSHIO
IPC分类号： H03H9/00 , H03H9/13 , H03H9/205 , H03H9/56
摘要： PURPOSE:To improve the efficiency and also to decrease a spurious level by providing an input side electrode group and an output side electrode group so as to overlap in the broadwise direction of ceramics. CONSTITUTION:Polarized electrodes 12, 13 are formed to an upper face and a lower face of a laminated type ceramics 11 having an internal electrode and polarization processing is applied so as to be polarized into the broadwise direction P. The internal electrode consists of two electrode groups 14, 15 overlapped in the broadwise direction of the ceramics, each electrode group is overlapped mutually in the broadwise direction P of the ceramics and consists of plural inserted electrodes 14a-14e and 15a-15e overlapped mutually and placed in parallel in the broadwise direction P of the ceramics and they are alternately led out to ceramics side faces 16, 17 respectively. On the other hand, in applying an input voltage while using one electrode group as the input side electrode group, the input side electrode group vibrates in the broadwise direction, a surface acoustic wave based on the vibration is delivered in the broadwise direction of the ceramics and an output is extracted from the output side electrode group.

57. 发明专利

JPS6041273A PIEZOELECTRIC DISPLACEMENT ELEMENT 失效
公开(公告)号：JPS6041273A
公开(公告)日：1985-03-04
申请号：JP15060383
申请日：1983-08-17
申请人： MURATA MANUFACTURING CO
发明人： OGAWA TOSHIO , YUGAWA KATSUMI
IPC分类号： H03H9/205 , H01L41/08 , H01L41/09
摘要： PURPOSE:To enable to drive at a low voltage with a low impedance by providing an N type piezoelectric ceramic layer and electrode layers of (n+1) layers in the interior and on the surface parallel to the layer. CONSTITUTION:Metal paste is printed on a piezoelectric ceramic green sheet 21, and an internal electrode paste layer 22 is formed. Other piezoelectric ceramic green sheet 23 is laminated thereon, and pressed, thereby forming a laminate 24. This laminate 24 is baked, and the layer 22 is simultaneously baked, thereby obtaining a sintered piezoelectric ceramic including integrally the internal electrode layer. The electrode layers are formed on the upper and lower surfaces of the sintered ceramic. The capacity can be increased by increasing the number of laminated layers, thereby forming low impedance and driving with a low voltage.

58. 发明专利

JPS5913803B2 JPS5913803B2 - 失效
公开(公告)号：JPS5913803B2
公开(公告)日：1984-04-02
申请号：JP9569176
申请日：1976-08-10
申请人： Murata Manufacturing Co
发明人： IIDA YOSHINAO , OGAWA TOSHIO , TOYODA MINORU
IPC分类号： G01J5/02 , C04B35/00 , C04B35/46 , C04B35/49 , G01J5/10 , G01J5/34 , G21H1/00 , H01B3/00 , H01B3/12 , H01L41/18 , H01L41/187

59. 发明专利

JPS5839795B2 失效
公开(公告)号：JPS5839795B2
公开(公告)日：1983-09-01
申请号：JP5686377
申请日：1977-05-16
申请人： MURATA MANUFACTURING CO
发明人： OGAWA TOSHIO , NISHAMA KOJI , MASUO TASUKU
IPC分类号： C04B35/453 , C23C14/06 , C23C14/34 , C23C14/40 , H01L41/18 , H01L41/187

60. 发明专利

JPS57129869A PIEZOELECTRIC CERAMIC COMPOSITION 失效
公开(公告)号：JPS57129869A
公开(公告)日：1982-08-12
申请号：JP1192581
申请日：1981-01-28
申请人： MURATA MANUFACTURING CO
发明人： OGAWA TOSHIO , KITSUTAKA TOSHIHIKO
IPC分类号： C04B35/46 , C04B35/472 , H01L41/18 , H01L41/187 , H01L41/193 , H02N2/00

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