摘要:
An AT cut quartz crystal resonator element includes a quartz crystal element comprising a rectangular excitation part, which comprises AT cut quartz crystal and in which an X-axis direction of quartz crystal crystallization is a long side; and a reinforcing part, which is arranged at a periphery of the rectangular excitation part and whose thickness is thicker than that of the excitation part; and an excitation electrode, which is arranged on front and rear main surfaces of the excitation part, the excitation part being integrally coupled with the thick reinforcing part, by a coupling part whose thickness is thinner than that of the excitation part; and both side surfaces of the excitation part in a long side direction being respectively constituted by two faces, which are an m-face and a crystal face other than the m-face.
摘要:
An objective is to provide an SH wave type SAW device which is a surface acoustic wave device using a quartz substrate and which is small in size and has a large Q value and excellent frequency aging characteristics. An SH wave type surface acoustic wave device includes a piezoelectric substrate and an IDT electrode provided on the piezoelectric substrate and constituted of Al or an alloy mainly containing Al and that uses a SH wave as an excitation wave. The piezoelectric substrate is a crystal plate in which a cut angle θ of a rotary Y cut quartz substrate is set in a range of -64.0°
摘要:
A surface acoustic wave device is provided. The surface acoustic wave device includes a piezoelectric substrate and an IDT which is disposed on the piezoelectric substrate and made of Al or an alloy containing Al as a main component and using an SH wave as an excitation wave, wherein the piezoelectric substrate is a rotated Y-cut quartz plate having a cut angle θ set to a range of -64.0°
摘要:
A piezoelectric vibration element is provided which includes a piezoelectric substrate formed of a thickness slip based piezoelectric material and a metal layer formed on a surface of the piezoelectric substrate. In the piezoelectric vibration element, a surface of the metal layer is covered by a layer formed by chemical absorption with a material having a nonbonding electron pair.
摘要:
A surface acoustic wave device has a piezoelectric substrate and an IDT formed on the piezoelectric substrate, and uses an excited wave as an SH wave. The piezoelectric substrate is a quartz plate in which a cut angle θ of a rotated Y-cut quartz substrate is set in the range of -65° ≤ θ ≤ -51° in a counter-clockwise direction from a crystal Z-axis and the propagation direction of a surface acoustic wave is set in the range (90° ± 5°) with respect to a crystal X-axis. The IDT is made of Ta or an alloyed metal containing Ta as the main component.
摘要:
A mesa-shaped piezoelectric resonator element including a resonator section having a thicker thickness than a peripheral section on the board surface of a piezoelectric substrate formed in a rectangular shape, wherein, when the length of the long side of the piezoelectric substrate is x and the board thickness of the resonator section is t, etching depth y of a level-difference section is set to fulfill a relationship in the following equation, based on the board thickness t. y = - 132 × x t + 43 ± 5
摘要翻译:一种台面状压电谐振元件,包括具有比形成为矩形形状的压电基板的板表面上的周边部分厚的厚度的谐振器部分,其中,当压电基板的长边的长度为x时, 谐振器部分的板厚度为t,电平差部分的蚀刻深度y被设置为基于板厚度t在下面的等式中满足关系。 y = - 132×x t + 43±5
摘要:
An optical-path compensating device comprises: a first wavelength plate inputting linearly polarized light that includes three different wavelengths λ 1 , λ 2 and λ 3 of which polarized directions are the same and optical paths are in parallel; a first birefringent plate inputting the linearly polarized light including the three different wavelengths that were emitted from the first wavelength plate; a second wavelength plate inputting the linear polarized light including the three different wavelengths that transmitted through the first birefringent plate; a second birefringent plate inputting the linear polarized light including the three different wavelengths that were emitted from the second wavelength plate; a third wavelength plate inputting the linear polarized light including the three different wavelengths that transmitted through the second birefringent plate. The first wavelength plate gives a phase difference 2πm 1 to the linearly polarized light including the wavelength λ 1 , a phase difference π(2n 1 -1) to the linearly polarized light including the wavelength λ 2 and a phase difference 2πq 1 to the linearly polarized light including the wavelength λ 3 respectively ( m 1 , n 1 and q 1 are integers). The first birefringent plate is arranged so as to make the linear polarized light including the wavelength λ 2 be an ordinary ray and the linear polarized light including the wavelengths λ 1 and λ 3 be an extraordinary ray, when these linear polarized light are emitted from the first wavelength plate along the optical axis of the first birefringent plate. The following equation is satisfied: t 1 = d 1 ⋅ n 0 2 ⋅ tan θ + n e 2 / n 0 2 − n e 2 ⋅ tan θ , where a distance for compensating an optical path is d 1 a refractive index of the birefringent plate to an ordinary ray is n0,a refractive index of the birefringent plate to an extraordinary ray is ne, an angle between an optical axis and a normal line to a main plane of the birefringent plate is θ and the thickness of the birefringent plate is ti. The second wavelength plate gives a phase difference π(2m 2 -1) to the linearly polarized light including the wavelength λ 1 , a phase difference 2πn 2 to the linearly polarized light including the wavelength λ 2 and a phase difference 2πq 2 to the linearly polarized light including the wavelength λ 3 respectively ( m 2 , n 2 and q 2 are integers). The second birefringent plate is arranged so as to make the linear polarized light including the wavelengths λ 1 and λ 2 be an extraordinary ray and the linear polarized light including the wavelength λ 3 be an ordinary ray, where these linear polarized light are emitted from the first wavelength plate along the optical axis of the second birefringent plate. The following equation is satisfied: t 2 = d 2 ⋅ n 0 2 ⋅ tan θ + n e 2 / n 0 2 − n e 2 ⋅ tan θ , where a distance for compensating an optical path is d 2 a refractive index of the birefringent plate to an ordinary ray is n0,a refractive index of the birefringent plate to an extraordinary ray is ne, an angle between an optical axis and a normal line to a main plane of the birefringent plate is θ and the thickness of the birefringent plate is t 2 . The third wavelength plate gives a phase difference π(2m 3 -1) to the linearly polarized light including the wavelength λ 1 , a phase difference π(2n 3 -1) to the linearly polarized light including the wavelength λ 2 and a phase difference 2πq 3 to the linearly polarized light including the wavelength λ 3 respectively ( m 3 , n 3 and q 3 are integers).
摘要:
A highly stable piezoelectric oscillator includes a heat-generating component mounted on a base printed circuit board; an erected printed circuit board placed upright on the base printed circuit board by fitting a fitting end part in a fitting slit that is formed to penetrate the base printed circuit board; a piezoelectric resonator which is disposed horizontally and directly on the heat-generating component on the base printed circuit board and whose lead electrode part is connected and fixed on the erected printed circuit board; and an oscillation circuit component to obtain an oscillation output using the piezoelectric resonator as a frequency source. Further, connection pads are arranged opposite from each other on surfaces of the base printed circuit board along both opposing end edges of the fitting slit; arc-shaped side through holes are provided on the inner walls of the fitting slit that correspond to each of the connection pads; and lead pads are arranged so as to have positional relations to their respective connection pads on both surfaces of the fitting end part of the erected printed circuit board; and each connection pad having the side through hole is soldered to each lead pad of the fitting end part.
摘要:
A surface acoustic wave device is provided. The surface acoustic wave device includes a piezoelectric substrate and an IDT which is disposed on the piezoelectric substrate and made of Al or an alloy containing Al as a main component and using an SH wave as an excitation wave, wherein the piezoelectric substrate is a rotated Y-cut quartz plate having a cut angle θ set to a range of -64.0°
摘要:
A piezoelectric oscillator comprising a piezoelectric vibrator with a piezoelectric vibrating element housed in a package and bottom terminals formed on the outer side of the bottom of the package, a circuit board with at least one electronic circuit component mounted and conductor patterns formed on the top side, and columnlike supports which mechanically and electrically connects the bottom terminals of the piezoelectric vibrator and the conductor patterns on the circuit board. The piezoelectric oscillator has a smaller board occupation area, and can be manufactured by quantity production using a batch process at a high productivity and a reduced cost.