| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 310325000 | Sandwich or Langevin type | 6 |
| 20090289526 | DEVICES HAVING A TUNABLE ACOUSTIC PATH LENGTH AND METHODS FOR MAKING SAME - A tunable acoustic resonator device. The device has a piezoelectric medium as a first thin film layer and a tunable crystal medium as a second thin film layer. The tunable crystal medium has a first acoustic behavior over an operating temperature range under a condition of relatively low applied stress and a second acoustic behavior under a condition of relatively high applied stress. The acoustic behaviors are substantially different. The tunable crystal medium has a highly field-polarizable and lattice-deformable, substantially centrosymmetric structure over an operating temperature range under a condition of relatively low applied stress. The tunable crystal medium has a substantially non-centrosymmetric structure over said operating temperature range under a condition of relatively high applied stress. The dielectric permittivity of the tunable crystal medium is at least 100 at the relatively low applied stress. The tunable crystal medium is close to its ferroelectric instability but remains paraelectric throughout the operating temperature range of the device. The phase transition temperature of the tunable crystal medium from paraelectric to ferroelectric state is just below the operating temperature range. | 11-26-2009 |
| 20100156241 | METHOD FOR MANUFACTURING COMPOSITE SUBSTRATE AND COMPOSITE SUBSTRATE - A supporting substrate and a piezoelectric substrate are prepared. A surface of the supporting substrate is bonded to the backside of the piezoelectric substrate with an organic adhesive layer interposed therebetween to form a laminated substrate. Subsequently, a peripheral surface of the laminated substrate is ground such that a peripheral surface of the piezoelectric substrate, a peripheral surface of the organic adhesive layer, and a peripheral surface of the supporting substrate on the side of the organic adhesive layer are made flush with each other. Subsequently, the surface of the piezoelectric substrate is polished to reduce the thickness of the piezoelectric substrate and performing mirror polishing of the surface. | 06-24-2010 |
| 20110001394 | PIEZOELECTRIC THIN-FILM TUNING FORK RESONATOR - The piezoelectric thin-film tuning fork resonator ( | 01-06-2011 |
| 20110221307 | ELECTROMECHANICAL TRANSDUCER DEVICE AND METHOD OF FORMING A ELECTROMECHANICAL TRANSDUCER DEVICE - A micro or nano electromechanical transducer device formed on a semiconductor substrate comprises a movable structure which is arranged to be movable in response to actuation of an actuating structure. The movable structure comprises a mechanical structure having at least one mechanical layer having a first thermal response characteristic, at least one layer of the actuating structure having a second thermal response characteristic different to the first thermal response characteristic, and a thermal compensation structure having at least one thermal compensation layer. The thermal compensation layer is different to the at least one layer and is arranged to compensate a thermal effect produced by the mechanical layer and the at least one layer of the actuating structure such that the movement of the movable structure is substantially independent of variations in temperature. | 09-15-2011 |
| 20130214643 | COMPOSITE PIEZOELECTRIC LATERALLY VIBRATING RESONATOR - A resonator is described. The resonator includes multiple electrodes. The resonator also includes a composite piezoelectric material. The composite piezoelectric material includes at least one layer of a first piezoelectric material and at least one layer of a second piezoelectric material. At least one electrode is coupled to a bottom of the composite piezoelectric material. At least one electrode is coupled to a top of the composite piezoelectric material. | 08-22-2013 |
| 20140015377 | OSCILLATOR AND ELECTRONIC DEVICE - A piezoelectric element ( | 01-16-2014 |
