GB1284966A - Improvements in or relating to a piezoelectric transducer and method of making same - Google Patents
Improvements in or relating to a piezoelectric transducer and method of making sameInfo
- Publication number
- GB1284966A GB1284966A GB40319/70A GB4031970A GB1284966A GB 1284966 A GB1284966 A GB 1284966A GB 40319/70 A GB40319/70 A GB 40319/70A GB 4031970 A GB4031970 A GB 4031970A GB 1284966 A GB1284966 A GB 1284966A
- Authority
- GB
- United Kingdom
- Prior art keywords
- disc
- electrodes
- ring
- cemented
- perimeter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000004519 manufacturing process Methods 0.000 title 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract 1
- 229910002113 barium titanate Inorganic materials 0.000 abstract 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 abstract 1
- 229910010293 ceramic material Inorganic materials 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000005684 electric field Effects 0.000 abstract 1
- 229920006333 epoxy cement Polymers 0.000 abstract 1
- 239000010408 film Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 239000011733 molybdenum Substances 0.000 abstract 1
- 238000010422 painting Methods 0.000 abstract 1
- 238000007747 plating Methods 0.000 abstract 1
- 230000010287 polarization Effects 0.000 abstract 1
- -1 polyethylene terephthalate Polymers 0.000 abstract 1
- 229920000139 polyethylene terephthalate Polymers 0.000 abstract 1
- 239000005020 polyethylene terephthalate Substances 0.000 abstract 1
- 238000004544 sputter deposition Methods 0.000 abstract 1
- 239000010409 thin film Substances 0.000 abstract 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 239000010937 tungsten Substances 0.000 abstract 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders or supports
- H03H9/09—Elastic or damping supports
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Manufacturing & Machinery (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
1284966 Piezo-electric transducers MOTOROLA Inc 21 Aug 1970 [23 Sept 1969] 40319/70 Heading H4S A disc of polarized piezo-electric ceramic material is stressed into a dish-shaped configuration and confined in that configuration by a frame attached to the perimeter of the disc. Electrodes are formed on the opposite major surfaces of the disc. The disc may function as the diaphragm of a loudspeaker or transmitter since it can be sufficiently thin to provide a good impedance match to air. By proper selection of materials and dimensions a wide frequency response may be obtained. A disc 10 (Fig. 1) of barium titanate has electrodes 11, 12 applied by plating, sputtering or painting. The electroded disc 10 is placed in a groove 14, 15 in a ring 13 of tungsten, tungsten carbide, alumina ceramic or molybdenum. A weight is applied to the centre of the disc to dish the disc. A unidirectional electrical field between the electrodes 11, 12 effects permanent polarization. The perimeter of the disc 10 is cemented into the groove 14, 15 by epoxy cement. Upon application of a signal current, the disc 10 alternately expands and contracts within its elastic limit. The movement is translated into movement perpendicular to the plane of the ring 13. The ring 13 has torsional characteristics to follow the movements of the disc. To minimize tendency of the disc 10 to fracture, a thin film of polyethylene terephthalate may be cemented to one or both major surfaces. The electrodes may be over this film. One or both electrodes 11, 12 may form a resistive conductive coating. A paper cone may be attached to the centre of the diac 10 to enhance low frequency response. It is also suggested to use a ring (23), Fig. 6 (not shown), having its inner surface in the form of a circular knife edge against which the dished disc is wedged.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US86021869A | 1969-09-23 | 1969-09-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1284966A true GB1284966A (en) | 1972-08-09 |
Family
ID=25332746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB40319/70A Expired GB1284966A (en) | 1969-09-23 | 1970-08-21 | Improvements in or relating to a piezoelectric transducer and method of making same |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3588552A (en) |
| JP (1) | JPS4944658B1 (en) |
| DE (2) | DE7035291U (en) |
| DK (1) | DK130560B (en) |
| ES (1) | ES383842A1 (en) |
| FR (1) | FR2062964B3 (en) |
| GB (1) | GB1284966A (en) |
| IL (1) | IL35230A (en) |
| NL (1) | NL7014052A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2155731A (en) * | 1983-11-01 | 1985-09-25 | John David Gregson | Ultrasonic transducers |
| DE102008011414A1 (en) * | 2008-02-27 | 2009-09-10 | Continental Automotive Gmbh | Method for polarizing a piezoceramic |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1006969A (en) * | 1973-07-26 | 1977-03-15 | Lyle E. Shoot | Piezoelectric transducer |
| US3948089A (en) * | 1973-10-12 | 1976-04-06 | Westinghouse Electric Corporation | Strain gauge apparatus |
| FR2282677A1 (en) * | 1974-08-22 | 1976-03-19 | Tretiakoff Oleg | POCKET ELECTRONIC CALCULATOR FOR THE BLIND |
| JPS51130216A (en) * | 1975-05-07 | 1976-11-12 | Matsushita Electric Ind Co Ltd | Electromechanical transducer |
| JPS5254419A (en) * | 1975-10-29 | 1977-05-02 | Pioneer Electronic Corp | Electroacoustic transducer |
| DE3169146D1 (en) * | 1980-11-07 | 1985-04-04 | Hitachi Ltd | Piezoelectric ceramic transducer |
| US4675960A (en) * | 1985-12-30 | 1987-06-30 | Motorola, Inc. | Method of manufacturing an electrically variable piezoelectric hybrid capacitor |
| JPS6367448U (en) * | 1986-06-27 | 1988-05-06 | ||
| JP3120260B2 (en) * | 1992-12-26 | 2000-12-25 | 日本碍子株式会社 | Piezoelectric / electrostrictive film type element |
| US5471721A (en) * | 1993-02-23 | 1995-12-05 | Research Corporation Technologies, Inc. | Method for making monolithic prestressed ceramic devices |
| US5632841A (en) * | 1995-04-04 | 1997-05-27 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Thin layer composite unimorph ferroelectric driver and sensor |
| JP3768789B2 (en) * | 2000-09-07 | 2006-04-19 | アルプス電気株式会社 | Ultrasonic vibrator, wet processing nozzle and wet processing apparatus |
| DE50204498D1 (en) * | 2001-01-31 | 2005-11-17 | Caterpillar Inc | Piezoelectric actuator |
| US7681290B2 (en) * | 2006-10-20 | 2010-03-23 | The Boeing Company | Piezoelectric bimorph beam manufacturing method |
| US9743190B2 (en) | 2015-03-31 | 2017-08-22 | Bose Corporation | Acoustic diaphragm |
| US9769570B2 (en) | 2015-03-31 | 2017-09-19 | Bose Corporation | Acoustic diaphragm |
| CN109935223B (en) * | 2017-12-19 | 2021-04-20 | 北京长城电子装备有限责任公司 | Ultra-small-size low-frequency transmitting transducer |
-
1969
- 1969-09-23 US US860218A patent/US3588552A/en not_active Expired - Lifetime
-
1970
- 1970-08-14 DK DK418470AA patent/DK130560B/en unknown
- 1970-08-21 GB GB40319/70A patent/GB1284966A/en not_active Expired
- 1970-08-27 JP JP45074611A patent/JPS4944658B1/ja active Pending
- 1970-09-03 IL IL35230A patent/IL35230A/en unknown
- 1970-09-21 ES ES383842A patent/ES383842A1/en not_active Expired
- 1970-09-22 FR FR707034351A patent/FR2062964B3/fr not_active Expired
- 1970-09-23 DE DE7035291U patent/DE7035291U/en not_active Expired
- 1970-09-23 NL NL7014052A patent/NL7014052A/xx not_active Application Discontinuation
- 1970-09-23 DE DE19702046901 patent/DE2046901B2/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2155731A (en) * | 1983-11-01 | 1985-09-25 | John David Gregson | Ultrasonic transducers |
| DE102008011414A1 (en) * | 2008-02-27 | 2009-09-10 | Continental Automotive Gmbh | Method for polarizing a piezoceramic |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2046901B2 (en) | 1972-02-17 |
| FR2062964A7 (en) | 1971-07-02 |
| US3588552A (en) | 1971-06-28 |
| IL35230A (en) | 1974-03-14 |
| ES383842A1 (en) | 1973-03-01 |
| IL35230A0 (en) | 1970-11-30 |
| NL7014052A (en) | 1971-03-25 |
| JPS4944658B1 (en) | 1974-11-29 |
| DE2046901A1 (en) | 1971-04-22 |
| FR2062964B3 (en) | 1973-06-08 |
| DK130560C (en) | 1975-08-18 |
| DE7035291U (en) | 1971-02-25 |
| DK130560B (en) | 1975-03-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |