摘要:
A surface acoustic wave device includes multiple SAW resonators formed on a piezoelectric substrate and connected in a ladder arrangement, the piezoelectric substrate having a polarization inverted region on which either a series-arm resonator or a parallel-arm resonator is formed.
摘要:
A surface acoustic wave device includes a piezoelectric substrate on which resonators having comb-like electrodes are formed; and a silicon substrate that is directly bonded to the piezoelectric substrate and is less expansive than the piezoelectric substrate, a cavity being formed in the silicon substrate and being located below at least one of the resonators.
摘要:
A filter includes a parallel resonator having first comb electrodes provided on a piezoelectric substrate and a first dielectric film that covers the first comb electrodes, and a series resonator having second comb electrodes provided on the piezoelectric substrate and a second dielectric film covers the second comb electrodes and is made of a material identical to that of the first dielectric film. The first dielectric film has a different thickness from that of the second dielectric film.
摘要:
An acoustic wave device includes a piezoelectric substrate, a first dielectric film formed on the piezoelectric substrate, and electrodes that are provided on the first dielectric film and excite an acoustic wave, the electrodes including electrode fingers. At least a part of the first dielectric film is cut out between adjacent electrode fingers among the electrode fingers.
摘要:
An elastic boundary wave device includes a first medium with piezoelectricity, an electrode exciting an elastic wave and provided on the first medium, a second medium made of a different material from the first medium and provided on the first medium to cover the electrode, and a sound absorbing portion provided on the second medium.
摘要:
An acoustic wave device includes a piezoelectric substrate, a first dielectric film provided on the piezoelectric substrate, electrodes that are provided on the first dielectric film and excite an acoustic wave, and a second dielectric film that is provided so as to cover the electrodes and is thicker than the electrodes.
摘要:
An elastic boundary wave device includes a first medium with piezoelectricity, an electrode exciting an elastic wave and provided on the first medium, a second medium made of a different material from the first medium and provided on the first medium to cover the electrode, and a sound absorbing portion provided on the second medium.
摘要:
An elastic boundary wave device includes a first medium that is piezoelectric, electrodes provided on the first medium to excite elastic waves, a dielectric film provided on the electrodes and the first medium, and a second medium provided on the dielectric film. The dielectric film mainly includes silicon oxide and a density thereof is at least 2.05 g/cm3.
摘要翻译:弹性边界波装置包括压电的第一介质,设置在第一介质上以激发弹性波的电极,设置在电极和第一介质上的电介质膜,以及设置在电介质膜上的第二介质。 电介质膜主要包括氧化硅,其密度为至少2.05g / cm 3。
摘要:
An acoustic wave device includes a piezoelectric substrate, a first dielectric film provided on the piezoelectric substrate, electrodes that are provided on the first dielectric film and excite an acoustic wave, and a second dielectric film that is provided so as to cover the electrodes and is thicker than the electrodes.
摘要:
An acoustic wave device includes a piezoelectric substrate, a resonator having comb electrodes that are provided above the piezoelectric substrate and excite an acoustic wave, and a capacitor that is provided above the piezoelectric substrate and is connected in series or parallel with the resonator, the capacitor including electrodes that horizontally face each other above the piezoelectric substrate. The electrodes of the capacitor are further from the piezoelectric substrate than the comb electrodes of the resonator.