WO2008023686A1 - Piezoelectric actuator element for ultrasonic motor - Google Patents
Piezoelectric actuator element for ultrasonic motor Download PDFInfo
- Publication number
- WO2008023686A1 WO2008023686A1 PCT/JP2007/066161 JP2007066161W WO2008023686A1 WO 2008023686 A1 WO2008023686 A1 WO 2008023686A1 JP 2007066161 W JP2007066161 W JP 2007066161W WO 2008023686 A1 WO2008023686 A1 WO 2008023686A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piezoelectric
- actuator element
- ultrasonic motor
- piezoelectric actuator
- thickness direction
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/50—Piezoelectric or electrostrictive devices having a stacked or multilayer structure
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/0005—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing non-specific motion; Details common to machines covered by H02N2/02 - H02N2/16
- H02N2/001—Driving devices, e.g. vibrators
- H02N2/003—Driving devices, e.g. vibrators using longitudinal or radial modes combined with bending modes
- H02N2/004—Rectangular vibrators
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
- H10N30/202—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using longitudinal or thickness displacement combined with bending, shear or torsion displacement
- H10N30/2023—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using longitudinal or thickness displacement combined with bending, shear or torsion displacement having polygonal or rectangular shape
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/87—Electrodes or interconnections, e.g. leads or terminals
- H10N30/871—Single-layered electrodes of multilayer piezoelectric or electrostrictive devices, e.g. internal electrodes
Definitions
- the present invention relates to a piezoelectric actuator element for an ultrasonic motor.
- Patent Document 2 discloses an ultrasonic motor element using a primary longitudinal and secondary bending mode, and is formed so as to divide a rectangular piezoelectric layer and the piezoelectric layer into two substantially. There is a description regarding a piezoelectric actuator element formed by alternately laminating electrode layers.
- FIGS. 13 (a) and 13 (b) are schematic views of this piezoelectric actuator element, showing a structure in which piezoelectric layers 10 and electrode layers 12 are alternately stacked.
- This piezoelectric actuator element also operates in the same manner as the piezoelectric element having the structure described in Patent Document 1 above, and excites longitudinal vibration and bending vibration on a vibration body made of the piezoelectric element and drives a member in contact with the vibration.
- Patent Document 1 Japanese Patent No. 2980541
- Patent Document 2 ACTUATOR2006 Preliminary Lecture ⁇ 1 1 (Piezoelectric Ultrasonic Motors for Lens Positioning of Cellular Phone Camera Modules)
- the ultrasonic motor element described in Patent Document 2 contributes to downsizing of the drive circuit compared to the structure described in Patent Document 1, but the piezoelectric sinterability at the center of the element is poor.
- the piezoelectric sinterability at the center of the element is poor.
- the electrode location is the same on the element projection surface (the distance between the electrodes is the same), and it is difficult to apply the lamination pressure to the piezoelectric portion in the vicinity of the electrode edge. There was a problem that was likely to occur.
- An object of the present invention is to provide a piezoelectric actuator element capable of improving the migration resistance in the vicinity of the center in the thickness direction of a multilayered piezoelectric element in which such migration is likely to occur.
- Another object of the present invention is to provide a piezoelectric actuator element that can prevent local heat generation during AC polarization processing and prevent generation of cracks during polarization.
- the piezoelectric layer and the electrode layer formed to divide the piezoelectric layer into approximately two layers are alternately laminated, and the primary longitudinal and secondary bending modes are provided.
- a piezoelectric actuator element for an ultrasonic motor to be used in which a piezoelectric inactive region is formed in a central portion in the thickness direction from the surface portion of the laminated piezoelectric element. .
- a piezoelectric inactive region having a layer thickness of 10% or more of the thickness in the stacking direction is formed in the central portion in the thickness direction from the surface portion of the stacked piezoelectric element.
- the heat generating portion that generates heat when the laminated piezoelectric element is polarized is dispersed.
- the electrode layer is formed so that the formation density of the electrode layer is smaller in the central part in the thickness direction than the surface part of the laminated piezoelectric element. It is preferable that the distance between the electrodes is increased in the central portion in the thickness direction than the surface portion of the multilayer piezoelectric element!
- the electrode layer area is formed to be smaller in the central portion in the thickness direction than the surface portion of the laminated piezoelectric element. It is preferable that no electrode layer is formed at the center in the thickness direction.
- FIG. 1 Figs. 1 (a) and 1 (b) show an embodiment of a piezoelectric actuator element for an ultrasonic motor of the present invention.
- Fig. 1 (a) is a front view
- Fig. 1 (b) Is a side view.
- FIGS. 2 (a) and 2 (b) show other embodiments of the piezoelectric actuator element for an ultrasonic motor of the present invention.
- FIG. 2 (a) is a front view
- FIG. 2 (b) is a front view. It is a side view.
- FIG. 3 is a graph showing a change in the distance between electrodes (interlayer distance) from the upper and lower surfaces of the element to the center of the element.
- FIGS. 4 (a) and 4 (b) show other embodiments of the piezoelectric actuator element for an ultrasonic motor of the present invention.
- FIG. 4 (a) is a front view
- FIG. 4 (b) is a front view. It is a side view.
- FIGS. 5 (a) and 5 (b) show other embodiments of the piezoelectric actuator element for an ultrasonic motor of the present invention.
- FIG. 5 (a) is a front view
- FIG. 5 (b) is a front view. It is a side view.
- FIGS. 6 (a) and 6 (b) show other embodiments of the piezoelectric actuator element for an ultrasonic motor of the present invention.
- FIG. 6 (a) is a front view
- FIG. 6 (b) is a front view. It is a side view.
- FIGS. 7 (a) and 7 (b) show other embodiments of the piezoelectric actuator element for an ultrasonic motor according to the present invention.
- FIG. 7 (a) is a front view
- FIG. It is a side view.
- FIGS. 8 (a) and 8 (b) show other embodiments of the piezoelectric actuator element for an ultrasonic motor according to the present invention.
- FIG. 8 (a) is a front view
- FIG. 8 (b) is a front view. It is a side view.
- FIGS. 9 (a) and 9 (b) show other embodiments of the piezoelectric actuator element for an ultrasonic motor of the present invention.
- FIG. 9 (a) is a front view
- FIG. 9 (b) is a front view. It is a side view.
- FIGS. 10 (a) and 10 (b) show other piezoelectric actuator elements for an ultrasonic motor according to the present invention.
- FIG. 10 (a) is a front view
- FIG. 10 (b) is a side view showing an embodiment.
- FIGS. 11 (a) and 11 (b) show another embodiment of the piezoelectric actuator element for an ultrasonic motor of the present invention.
- FIG. 11 (a) is a front view
- FIG. 11 (b) is a side view.
- FIG. 11 (a) is a front view
- FIG. 11 (b) is a side view.
- FIGS. 12 (a) and 12 (b) show another embodiment of the piezoelectric actuator element for an ultrasonic motor of the present invention.
- FIG. 12 (a) is a front view and
- FIG. 12 (b) is a side view.
- FIG. 12 (a) is a front view
- FIG. 12 (b) is a side view.
- FIGS. 13 (a) and 13 (b) show the outline of the configuration of a conventional piezoelectric actuator element for an ultrasonic motor.
- FIG. 13 (a) is a front view
- FIG. 13 (b) is a side view. is there.
- FIG. 14 shows the generation of cracks during the polarization treatment of piezoelectric elements in Example 2 and Comparative Example 2.
- the piezoelectric actuator element of the present invention is basically composed of a laminated piezoelectric element formed by alternately laminating piezoelectric layers and electrode layers formed so as to divide the piezoelectric layers into two substantially. Yes.
- This laminated piezoelectric element is bent and deformed in a primary longitudinal and secondary bending mode by applying a voltage.
- I will include it here.
- the piezoelectric actuator element of the present invention is characterized in that a piezoelectric inactive region is formed in the inner layer of the laminated piezoelectric element described above.
- This piezoelectric inactive region has a layer thickness of the piezoelectric inactive region that is preferably formed near the center in the thickness direction of the laminated piezoelectric element so that the layer thickness is 10% or more of the thickness in the laminating direction.
- the force is preferably 10% to 50% of the thickness in the direction, and more preferably 10% to 40%.
- the device drive amplitude will be significantly smaller than the input signal when the device is driven, while if it is less than 10%, cracks will occur during polarization. (See Examples 1 and 2 below).
- the laminated piezoelectric element as described above is capable of preventing the occurrence of cracks during polarization because the heat generating portions that generate heat at this time are dispersed in the element. Power, I like it.
- Specific means for dispersing the heat generating part includes forming a piezoelectric inactive region in the inner layer of the laminated piezoelectric element.
- the piezoelectric inactive region is preferably formed in the vicinity of the center in the thickness direction of the multilayer piezoelectric element so that the layer thickness is 10% or more of the thickness in the stack direction.
- the layer thickness is preferably 10% to 50% of the thickness in the stacking direction, more preferably 10% to 40%.
- the formation density of the electrode layer is reduced in the central portion in the thickness direction from the surface portion of the multilayer piezoelectric element.
- the electrode layer area is smaller in the central portion in the thickness direction than the surface of the laminated piezoelectric element. It is preferable that they are formed as follows.
- the electrode layer so that the formation density is smaller in the center in the thickness direction than the surface portion of the multilayer piezoelectric element, migration resistance is improved while suppressing a decrease in displacement, and a short circuit occurs. (Short circuit) can be prevented, and heat generation points during AC polarization can be dispersed, improving reliability. In addition, the amount of electrodes is small, which can contribute to cost reduction.
- the piezoelectric layer it is also possible to use a magneto-electrostrictive ceramic, a ferroelectric ceramic, or an antiferroelectric ceramic in which piezoelectric ceramic is preferably used.
- Specific materials include lead zirconate, lead titanate, lead magnesium niobate, lead nickel niobate, lead zinc niobate, lead manganate niobate, lead antimonate stannate, lead manganese tandate stearate, lead cobalt niobate , Barium titanate, bismuth sodium titanate, tita Examples thereof include ceramics containing bismuth neodymium oxide, potassium sodium niobate, strontium bismuth tantanolate, etc. alone or as a mixture.
- the electrode layer is preferably made of a metal that is solid at room temperature and has excellent conductivity.
- a metal that is solid at room temperature and has excellent conductivity.
- aluminum, titanium, chromium, iron, cobalt, nickel, copper, zinc, niobium, molybdenum , Ruthenium, palladium, rhodium, silver, tin, tantalum, tungsten, iridium, platinum, gold, lead, etc., or their alloys were used, and the same material as the piezoelectric layer was dispersed in them. Cermet material may be used.
- FIGS. 1 (a) and 1 (b) show an embodiment of a piezoelectric actuator element for an ultrasonic motor of the present invention, which is formed so as to divide the piezoelectric layer 10 and the piezoelectric layer 10 into two substantially.
- the electrode layer 12 is alternately laminated, and the piezoelectric inactive region (the electrode layer is formed) from the surface of the laminated piezoelectric element 14 to the central portion in the thickness direction. (! /, Na! /, Region) 11 is formed.
- Reference numeral 15 denotes a friction member.
- FIGS. 2 (a) and 2 (b) show another embodiment of the piezoelectric actuator element according to the present invention.
- the laminated piezoelectric element 14 is formed by alternately laminating the layers 12, and is formed such that the distance between the electrodes is larger at the central portion in the thickness direction than the surface portion of the laminated piezoelectric element 14. That is, the vicinity of the upper and lower surface portions in the thickness direction of the laminated piezoelectric element 14 is the same inter-electrode distance as in the conventional example shown in FIGS.
- the change in the distance between the electrodes from the upper and lower surface portions to the center portion may be linear or exponential, but is preferably exponential. Further, the change in the distance between electrodes (distance between electrode layers) may be made for every plurality of layers (stepped).
- FIG. 4 (a) (13) to FIG. 6 (&) (b) show other embodiments of the piezoelectric actuator element according to the present invention, respectively, in the thickness direction from the surface portion of the laminated piezoelectric element 14.
- the electrode layer 12 is formed so that the area is small. That is, the vicinity of the upper and lower surface portions in the thickness direction of the laminated piezoelectric element 14 has the same electrode length as the conventional example shown in FIGS. 13 (a) and 13 (b), and the center portion in the thickness direction is formed so that the electrode length is shortened. (Centering around the B2 mode inflection point As electrodes are arranged). Here, the rate of change of the electrode length is linear (see Figs.
- FIGS. 6 (a) and 6 (b) are preferable, in which the rate of change is smaller at the center in the thickness direction and the rate of change is greater near the upper and lower surface portions. This is because heat generation in the central portion of the multilayer piezoelectric element 14 that is difficult to dissipate heat is suppressed.
- FIGS. 7 (a), (b) to FIG. 9 (a), (b) also show other embodiments of the piezoelectric actuator element according to the present invention.
- the vicinity of the surface portion has the same electrode width as that of the conventional example shown in FIGS. 13 (a) and 13 (b), and the central portion in the thickness direction is formed so that the electrode width becomes narrow.
- the rate of change of the electrode width is linear (see Figs. 7 (a) and (b)), but is also high-order and exponential (Figs. 8 (a) (b) and 9 (a)
- the embodiment shown in FIGS. 9 (a) and 9 (b) is preferred, with the rate of change being smaller at the center in the thickness direction and the rate of change being greater near the upper and lower surface portions. This is because heat generation at the center of the multilayer piezoelectric element 14 that is difficult to dissipate heat is suppressed.
- FIGS. 10 (a) and 10 (b) show still another embodiment of the piezoelectric actuator element according to the present invention.
- FIGS. 4 (a), (13) to 6 (& ) It can be said that the embodiment of (b) and the embodiments of FIGS. 7 (a), (b) to 9 (a), (b) are added together.
- FIGS. 11 (a) and 11 (b) show still another embodiment of the piezoelectric actuator element according to the present invention.
- the electrode layer is The ceramic plate-like member 16 that is not formed and that is stronger than the material constituting the piezoelectric layer 10 is integrally formed.
- a high-strength ceramic plate-like member 16 such as zirconia is fired in the center in the thickness direction of the multilayer piezoelectric element 14 to form an element, and one of the ceramic plate-like members 16 is formed. End or both ends are laminated piezoelectric A friction member is formed by protruding from the piezoelectric portion of the element 14.
- the electrode layer 18 has a full length. It is formed over. According to this embodiment, by appropriately selecting the number of electrode layers 18 over the entire length, the balance of the X-direction displacement and the y-direction displacement of the friction member 20 due to Ll and B2 vibrations can be optimized, and the driving efficiency can be improved. It can be improved.
- the outer shape is the same as that of Comparative Example 1 described above, and an ultrasonic motor in which a piezoelectric inactive layer is formed at the central portion in the stacking direction so as to be 2 to 40% of the total thickness of the piezoelectric element for an ultrasonic motor.
- a piezoelectric element was produced in the same manner as in Comparative Example 1 (Examples 1 to 10).
- Table 1 shows the results of a 2.8V drive endurance test performed on these devices in an environment of 85 ° C and 85% RH.
- Comparative Example 1 pieoelectric inactive layer 0%
- a short circuit appeared in about 200 hours.
- SEM-EDS SEM-EDS
- the ultrasonic motor using the piezoelectric actuator element of the present invention is capable of positioning a very small distance at high speed and with high accuracy, and has high reliability. Therefore, the autofocus mechanism, zoom mechanism, It can be used as a camera shake correction mechanism, and it is required to have high reliability for stage driving in optical microscopes, electron microscopes, atomic force microscopes, etc. It is also preferably used in the field.
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200780030923XA CN101507093B (zh) | 2006-08-23 | 2007-08-21 | 用于超声电机的压电致动器元件 |
| EP07792773.9A EP2056442B1 (en) | 2006-08-23 | 2007-08-21 | Piezoelectric actuator element for ultrasonic motor |
| JP2008530911A JP5189983B2 (ja) | 2006-08-23 | 2007-08-21 | 超音波モーター用圧電アクチュエータ素子 |
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US83947506P | 2006-08-23 | 2006-08-23 | |
| US60/839,475 | 2006-08-23 | ||
| US86443406P | 2006-11-06 | 2006-11-06 | |
| US60/864,434 | 2006-11-06 | ||
| US86741806P | 2006-11-28 | 2006-11-28 | |
| US60/867,418 | 2006-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008023686A1 true WO2008023686A1 (en) | 2008-02-28 |
Family
ID=39106770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/066161 Ceased WO2008023686A1 (en) | 2006-08-23 | 2007-08-21 | Piezoelectric actuator element for ultrasonic motor |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7564173B2 (ja) |
| EP (1) | EP2056442B1 (ja) |
| JP (1) | JP5189983B2 (ja) |
| KR (1) | KR20090047523A (ja) |
| CN (1) | CN101507093B (ja) |
| WO (1) | WO2008023686A1 (ja) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010110291A1 (ja) * | 2009-03-25 | 2010-09-30 | 京セラ株式会社 | 積層型圧電素子およびそれを用いた噴射装置ならびに燃料噴射システム |
| JP2013161970A (ja) * | 2012-02-06 | 2013-08-19 | Ngk Insulators Ltd | 圧電素子の製造方法 |
| JP2014501038A (ja) * | 2010-11-15 | 2014-01-16 | エプコス アクチエンゲゼルシャフト | 圧電素子 |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007083475A1 (ja) * | 2006-01-17 | 2007-07-26 | Murata Manufacturing Co., Ltd. | 共振アクチュエータ |
| JP4911066B2 (ja) * | 2007-02-26 | 2012-04-04 | 株式会社デンソー | 積層型圧電素子 |
| JP2010233339A (ja) * | 2009-03-26 | 2010-10-14 | Seiko Epson Corp | 圧電モーター、液体噴射装置及び時計 |
| JP5382320B2 (ja) * | 2009-03-26 | 2014-01-08 | セイコーエプソン株式会社 | 圧電モーター、液体噴射装置及び時計 |
| JP6592993B2 (ja) * | 2015-07-07 | 2019-10-23 | セイコーエプソン株式会社 | 圧電駆動装置及びロボット |
| EP3276817A1 (en) | 2016-07-29 | 2018-01-31 | Physik Instrumente (PI) GmbH & Co. Kg | Actuator |
| EP4725108A2 (en) * | 2023-06-09 | 2026-04-15 | Worcester Polytechnic Institute | Apparatus and methods for image-guided robotic surgical interventions |
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| JPH07337044A (ja) * | 1994-06-07 | 1995-12-22 | Olympus Optical Co Ltd | 超音波アクチュエータ |
| JPH08228030A (ja) * | 1995-02-21 | 1996-09-03 | Nec Corp | 積層圧電素子 |
| JP2980541B2 (ja) | 1994-06-28 | 1999-11-22 | ナノモーション・リミテッド | マイクロモータ |
| JP2001503920A (ja) * | 1996-11-12 | 2001-03-21 | マルコ システムアナリューゼ ウント エントヴィックルング ゲーエムベーハー | 圧電アクチュエータによる駆動または調整要素 |
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| JPS61268085A (ja) * | 1985-05-23 | 1986-11-27 | Sumitomo Metal Mining Co Ltd | 圧電体の分極方法 |
| JPH0732273B2 (ja) * | 1986-05-22 | 1995-04-10 | 日本電気株式会社 | 電歪効果素子 |
| JP2891510B2 (ja) * | 1990-05-09 | 1999-05-17 | 日本電子株式会社 | 圧電素子駆動体 |
| US5345137A (en) * | 1991-04-08 | 1994-09-06 | Olympus Optical Co., Ltd. | Two-dimensionally driving ultrasonic motor |
| IL106296A0 (en) * | 1993-07-09 | 1993-12-28 | Nanomotion Ltd | Ceramic motor |
| US5616980A (en) * | 1993-07-09 | 1997-04-01 | Nanomotion Ltd. | Ceramic motor |
| JP2842394B2 (ja) * | 1996-07-30 | 1999-01-06 | 日本電気株式会社 | 圧電素子の製造方法 |
| JP3577170B2 (ja) * | 1996-08-05 | 2004-10-13 | 株式会社村田製作所 | 圧電共振子とその製造方法およびそれを用いた電子部品 |
| JP2004297951A (ja) * | 2003-03-27 | 2004-10-21 | Olympus Corp | 超音波振動子及び超音波モータ |
-
2007
- 2007-08-21 US US11/842,233 patent/US7564173B2/en not_active Expired - Fee Related
- 2007-08-21 JP JP2008530911A patent/JP5189983B2/ja not_active Expired - Fee Related
- 2007-08-21 EP EP07792773.9A patent/EP2056442B1/en not_active Not-in-force
- 2007-08-21 CN CN200780030923XA patent/CN101507093B/zh not_active Expired - Fee Related
- 2007-08-21 KR KR1020097005194A patent/KR20090047523A/ko not_active Ceased
- 2007-08-21 WO PCT/JP2007/066161 patent/WO2008023686A1/ja not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07337044A (ja) * | 1994-06-07 | 1995-12-22 | Olympus Optical Co Ltd | 超音波アクチュエータ |
| JP2980541B2 (ja) | 1994-06-28 | 1999-11-22 | ナノモーション・リミテッド | マイクロモータ |
| JPH08228030A (ja) * | 1995-02-21 | 1996-09-03 | Nec Corp | 積層圧電素子 |
| JP2001503920A (ja) * | 1996-11-12 | 2001-03-21 | マルコ システムアナリューゼ ウント エントヴィックルング ゲーエムベーハー | 圧電アクチュエータによる駆動または調整要素 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010110291A1 (ja) * | 2009-03-25 | 2010-09-30 | 京セラ株式会社 | 積層型圧電素子およびそれを用いた噴射装置ならびに燃料噴射システム |
| JP5409772B2 (ja) * | 2009-03-25 | 2014-02-05 | 京セラ株式会社 | 積層型圧電素子およびそれを用いた噴射装置ならびに燃料噴射システム |
| JP2014501038A (ja) * | 2010-11-15 | 2014-01-16 | エプコス アクチエンゲゼルシャフト | 圧電素子 |
| US9379308B2 (en) | 2010-11-15 | 2016-06-28 | Epcos Ag | Piezoelectric component |
| JP2013161970A (ja) * | 2012-02-06 | 2013-08-19 | Ngk Insulators Ltd | 圧電素子の製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2056442A1 (en) | 2009-05-06 |
| CN101507093A (zh) | 2009-08-12 |
| CN101507093B (zh) | 2012-05-23 |
| EP2056442B1 (en) | 2014-04-30 |
| US20080048526A1 (en) | 2008-02-28 |
| EP2056442A4 (en) | 2013-06-12 |
| JP5189983B2 (ja) | 2013-04-24 |
| JPWO2008023686A1 (ja) | 2010-01-14 |
| US7564173B2 (en) | 2009-07-21 |
| KR20090047523A (ko) | 2009-05-12 |
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