Patent
Piezoelectric resonator with layered electrodes
TLDR
In this article, an improved piezoelectric resonator having multiple layers of material within each electrode of the resonator was proposed, which was used to increase the effective coupling coefficient.Abstract:
An improved piezoelectric resonator having multiple layers of material within each electrode of the resonator. One layer of material within each electrode is selected and used to increase the effective coupling coefficient between the piezoelectric layer of material in the resonator and the electric fields resulting from the voltages applied to the electrodes. The second layer of material within each electrode is selected and used to decrease the electrical losses within the electrodes.read more
Citations
More filters
Patent
Controlled effective coupling coefficients for film bulk acoustic resonators
TL;DR: In this paper, the coupling coefficient of first and second filters are individually tailored in order to achieve desired frequency responses by varying the ratio of the thickness of a piezoelectric layer to the total thickness of electrode layers.
Patent
Coupled resonator bulk acoustic wave filter
TL;DR: In this paper, a microwave filter made of acoustically coupled, bulk wave acoustic resonators is proposed, where piezoelectric materials sandwiched between conducting electrodes are used to control the amount of acoustic coupling between the resonators.
Patent
Piezoelectric thin-film resonator and filter
TL;DR: A piezoelectric thin film resonator as mentioned in this paper is a thin-film resonator that consists of a substrate, a substrate and an upper electrode, where the lower electrode and the upper electrode face each other across the substrate.
Patent
Method of mass loading of thin film bulk acoustic resonators (fbar) for creating resonators of different frequencies and apparatus embodying the method
TL;DR: In this article, a method for fabricating a resonator, and in particular, a thin-film bulk acoustic resonator (FBAR), and resonators embodying the method are disclosed.
Patent
Piezoelectric on semiconductor-on-insulator microelectromechanical resonators
TL;DR: In this article, a piezoelectric resonator with a bi-directionally adjustable resonance frequency was described, and the resonator was configured to receive a direct current voltage that adjusts the resonance frequency of the resonating member.
References
More filters
Patent
Bonded type piezoelectric apparatus, method for manufacturing the same and bonded type piezoelectric element
TL;DR: In this article, the authors present a method to apply metallization on the bonding surface of a piezoelectric ceramic with a metal likely to react with the piezelectric material.
PatentDOI
Piezoelectric electro-mechanical bimorph transducer
TL;DR: In this article, an electro-mechanical transducer has a first layer made of piezoelectric material having opposing major surfaces, a pair of electrodes formed on the major surfaces of the first and second layers, respectively, and a second layer clamped at its one surface to one of the surfaces on the first layer.
Patent
Piezoelectric resonator chip and trimming method for adjusting the frequency thereof
TL;DR: In this article, a piezoelectric resonator chip is used to construct a pair of electrode patterns which are formed on the opposite surfaces of the chip plate, and the electrode patterns face each other through the piezelectric chip plate.
Patent
Temperature compensated surface acoustic wave device
TL;DR: In this paper, a surface acoustic wave device with a single crystal substrate is proposed, where the cut angles of the substrate and the propagation direction of the surface acoustic waves are expressed by Eulerian angles.