Abstract: A rotating motion sensor includes at least one electroacoustic resonator to stimulate a surface acoustic wave. The at least one electroacoustic resonator is configured so that rotation of the at least one electroacoustic resonator about an axis of rotation causes a change in resonance frequency of the at least one electroacoustic resonator. The at least one electroacoustic resonator includes oscillating structures configured to oscillate in a first direction that is a direction of propagation of the surface acoustic wave and/or a second direction that is transverse to the direction of propagation of the surface acoustic wave.

Abstract: A surface acoustic wave component includes a piezoelectric substrate and an electrode structure that includes multiple layers and that is on the piezoelectric substrate. A dielectric layer is above the electrode structure. The dielectric layer has an acoustic impedance Za,d. The multiple layers include a first layer system that includes at least one first layer made of a first material, which has an acoustic impedance that is less than 2Za,d. The second layer system includes at least one second layer made of a second material, which has an acoustic impedance that exceeds 2Za,d. The second layer system has a height that is between 15% and 85% of a total height of the multiple layers.

Abstract: Elements and methods for forming elements that operate with acoustic waves are disclosed. The element includes a piezoelectric electric substrate that has a first thermal coefficient of expansion, electrically conducting element structures on an upper side of the substrate, a compensation layer on an underside of the substrate, and an SiO2 layer over the element structures.

Abstract: An electroacoustic component operates with guided acoustic waves and includes a first substrate, a second substrate, a metallic layer and an intermediate layer. The first substrate (S1) is made from a monocrystalline LiTaO3. The metallic layer is arranged between the first substrate and the intermediate layer. The intermediate layer is arranged between the metallic layer and the second substrate. The crystal section of monocrystalline LiTaO3 is chosen such that for the second Euler angle ?: ?100°????40° or ?160°????130°. For the first Euler angle ?, preferably ?=0° and for the third Euler angle ?, ?10°???10°.

Abstract: An electrical component has electrically conducting structures placed on an electrically isolating or semiconductive substrate and component structures sensitive to a voltage or an electrical arcing and galvanically separated from one another. To prevent an arcing between the galvanically separated component structures, the component structures are short-circuited with a shunt line having a smaller cross-section than the remaining electrical conductor tracks. The shunt lines can be burnt through by application of an electrical current at any given time, whereby a galvanic separation of the component structures is effected, if necessary, for the function of the component.

Abstract: A circuit for use with bulk acoustic waves includes a first electroacoustic system in a first branch and a second electroacoustic system in a second branch. The first electroacoustic system includes a first resonator and a second resonator that are in series in the first branch, and that are galvanically separated, and acoustically coupled, by a first coupling system. The second electroacoustic system includes a first resonator and a second resonator that are connected in series in the second branch, and that are galvanically separated, and acoustically coupled, by a second coupling system. The first and second electroacoustic systems are acoustically coupled via the first and second coupling systems and/or electrically coupled.

Abstract: An apparatus including a piezoelectric substrate having at least one transducer electrode structure. The structure having a metallization formed by one or more metals with a mean specific density that is at least 50% higher than that of aluminum. The structure having a compensation layer that is applied fully or partially over the metallization. The compensation layer is of a material having a temperature dependence of elastic constants that counteracts the temperature coefficient of frequency of the substrate. The compensation layer has a thickness that is less than 15% of an acoustic wavelength of a wave capable of propagation in the structure.

Abstract: An electroacoustic component includes a carrier substrate and a piezosubstrate having piezoelectric properties. The electroacoustic component also includes a layer system between the carrier substrate and the piezosubstrate.

Abstract: An electroacoustic transducer includes a first electrode having first fingers connected to a first bus bar, and a second electrode having second fingers connected to a second bus bar. The first and second fingers interdigitate and terminate at ends. The ends of the first and second fingers abut gaps between the first and second electrodes. An acoustic wave of wavelength ? is excitable at a resonant frequency. The acoustic wave has a longitudinal and a transverse excitation profile and a longitudinal and a transverse energy density profile, where the longitudinal excitation profile is approximately constant and different from the longitudinal energy density profile, and the transverse excitation profile substantially corresponds to the transverse energy density profile. Transverse positions of the gaps relative to the first and second bus bars vary to substantially correspond to the transverse excitation profile across the gaps.

Abstract: A component working with guided acoustic waves includes a layer system configured to guide waves in a lateral plane. The layer system includes a piezoelectric layer, electrodes on the piezoelectric layer for exciting the wave, a dielectric layer with an acoustic impedance, and an adjustment layer with an acoustic impedance. A ratio of the acoustic impedance of the adjustment layer to the acoustic impedance of the dielectric layer is greater than 1.5.

Abstract: A component working with guided bulk acoustic waves includes a first substrate, a second substrate, and a layer system between the first and second substrates. The layer system includes a metal layer and a dielectric layer. A ratio of the acoustic impedance of the metal layer to the acoustic impedance of the dielectric layer is greater than or equal to 4.5.

Abstract: An electrical component has electrically conducting structures placed on an electrically isolating or semiconductive substrate and component structures sensitive to a voltage or an electrical arcing and galvanically separated from one another. To prevent an arcing between the galvanically separated component structures, the component structures are short-circuited with a shunt line having a smaller cross-section than the remaining electrical conductor tracks. The shunt lines can be burnt through by application of an electrical current at any given time, whereby a galvanic separation of the component structures is effected, if necessary, for the function of the component.

Abstract: The invention relates to a component operating with guided bulk acoustic waves, GBAW, with a layer system that comprises a piezoelectric layer (PS1) and a first metal layer (ME1) arranged thereon. The layer system forms a waveguide in which the guided bulk acoustic wave is guided in the lateral direction. The component comprises two resonators acoustically coupled to one another and electrically isolated from one another. The corresponding resonator comprises an electrode (A), formed in a metal layer (ME1), with electrode structures periodically arranged in the wave-propagation direction.

Abstract: For a component operating with acoustic waves, it is proposed to arrange the electrode structure over a mechanically stable adaptation layer that serves to dissipate the electromechanical stresses. Further improvements of the output compatibility are achieved with additional intermediate layers and passivation layers applied on the sides or the entire surface over the electrode structure.

Abstract: A surface acoustic wave component includes a piezoelectric substrate and an electrode structure that includes multiple layers and that is on the piezoelectric substrate. A dielectric layer is above the electrode structure. The dielectric layer has an acoustic impedance Za,d. The multiple layers include a first layer system that includes at least one first layer made of a first material, which has an acoustic impedance that is less than 2Za,d. The second layer system includes at least one second layer made of a second material, which has an acoustic impedance that exceeds 2Za,d. The second layer system has a height that is between 15% and 85% of a total height of the multiple layers.

Abstract: Elements and methods for forming elements that operate with acoustic waves are disclosed. The element includes a piezoelectric electric substrate that has a first thermal coefficient of expansion, electrically conducting element structures on an upper side of the substrate, a compensation layer on an underside of the substrate, and an SiO2 layer over the element structures.

Abstract: The invention pertains to an oscillator with a resonator element and a control element for adjusting the resonant frequency of the resonator element to a plurality of different values, wherein the resonator element consists of at least one resonator. The control element can be realized as a control layer for controlling the propagation speed of the acoustic wave in the resonator. The control element can alternatively be constructed as a switch element and be used for switching different sub-branches of a resonator element constructed as a resonator magazine or a resonator bank. A trimming element, with which fine-tuning of the oscillator frequency is possible, is preferably also provided.

Abstract: A component operating with surface-proximal acoustic waves, in particular a filter with novel structure, has interdigital transducers arranged in serial and parallel branches, which are acoustically coupled with one another in different configurations. The component provides a loss-poor filter with simultaneously space-saving arrangement of the filter elements.

Abstract: A component includes a filter having a first structure and a second structure. The component also includes a substrate on which the first and second structures are arranged. The first structure has an approximately uniform layer thickness and an approximately uniform composition. The second structure has an approximately uniform layer thickness and an approximately uniform composition. At least one of the layer thickness or composition of the first structure differs from the layer thickness or composition of the second structure.

Abstract: An electroacoustic component including a layer system disposed between two substrates and electroacoustic structures for exciting a guided bulk acoustic wave, the electroacoustic structures being devoid of cavities. The layer system includes a piezo-electric layer, at least one metal layer, and a planarizing layer, which includes a planar interface provided with a substrate disposed directly thereabove. Such a component can be produced at a low cost by direct wafer bonding of two wafers. The electroacoustic component structures are electrically connected to the external contacts through perpendicular electrical connections.