Abstract: In an electronic component, a first inductor and a second inductor are disposed side by side in a first direction, and in a region where the first inductor and the second inductor are adjacent to each other in the first direction, at least one of positions in a second direction of an upper surface of a first inductor pattern, and an upper surface of a second inductor pattern and positions in the second direction of a lower surface of the first inductor pattern and a lower surface of a second inductor pattern, are different.

Abstract: Disclosed is a surface acoustic wave filter comprising two or more IDTs arranged in a propagation direction of the surface acoustic wave, wherein said two or more IDTs include at least one pair of IDTs arranged adjacent to each other in order to be acoustically coupled to each other, and have different numbers of paired electrode fingers, and a pitch between each neighboring two of almost all of the electrode fingers included in one of the pair of IDTs which has the smaller number of paired electrode fingers is made different from one to another in order that the IDTs should include no primary pitch area.

Abstract: A SAW filter comprises an IDT disposed on a piezo-electric substrate, wherein the IDT includes comb-shaped electrodes having a plurality of interdigital electrodes arranged in a propagation direction of surface acoustic waves and bus bars for connecting these interdigital electrodes, arranged in opposition, and the interdigital electrodes are crossed with one another. The IDT comprises one or more branch electrodes branched from the interdigital electrode and positioned in a non-overlap zone between an overlap zone at which the interdigital electrodes overlap and the bus bar, and the branch electrode includes a branch electrode body extending in a direction substantially orthogonal to the propagation direction of surface acoustic wave. The SAW filter can be applied to any of a longitudinally coupled multi-mode filter, a ladder type filter, a resonator, a filter having a resonator connected in series to a longitudinally coupled multi-mode filter, and the like.

Abstract: Disclosed is a surface acoustic wave filter comprising two or more IDTs arranged in a propagation direction of the surface acoustic wave, wherein said two or more IDTs include at least one pair of IDTs arranged adjacent to each other in order to be acoustically coupled to each other, and have different numbers of paired electrode fingers, and a pitch between each neighboring two of almost all of the electrode fingers included in one of the pair of IDTs which has the smaller number of paired electrode fingers is made different from one to another in order that the IDTs should include no primary pitch area.

Abstract: A surface acoustic wave apparatus includes an input terminal, an output terminal, a plurality of acoustically coupled interdigital transducers (IDT), and a phase rotating element (line or inductor) connected in parallel with one or more IDT's. The acoustically coupled IDT's are connected in series between the input and output terminals. Alternatively, the acoustically coupled IDT's may include a series IDT to which the phase rotating element is connected and which is connected in series between the input and output terminals, and a branch IDT acoustically coupled to the series IDT, and disposed on a transmission path which branches from a transmission path between the input and output terminals to a reference potential. Among the plurality of IDT's, ?a??b is established, where ?a represents an electrode finger pitch of the IDT to which the phase rotating element is connected, and ?b represents an electrode finger pitch of the IDT to which no phase rotating element is connected.

Abstract: A SAW filter comprises an IDT disposed on a piezo-electric substrate, wherein the IDT includes comb-shaped electrodes having a plurality of interdigital electrodes arranged in a propagation direction of surface acoustic waves and bus bars for connecting these interdigital electrodes, arranged in opposition, and the interdigital electrodes are crossed with one another. The IDT comprises one or more branch electrodes branched from the interdigital electrode and positioned in a non-overlap zone between an overlap zone at which the interdigital electrodes overlap and the bus bar, and the branch electrode includes a branch electrode body extending in a direction substantially orthogonal to the propagation direction of surface acoustic wave. The SAW filter can be applied to any of a longitudinally coupled multi-mode filter, a ladder type filter, a resonator, a filter having a resonator connected in series to a longitudinally coupled multi-mode filter, and the like.

Abstract: A surface acoustic wave apparatus includes an input terminal, an output terminal, a plurality of acoustically coupled interdigital transducers (IDT), and a phase rotating element (line or inductor) connected in parallel with one or more IDT's. The acoustically coupled IDT's are connected in series between the input and output terminals. Alternatively, the acoustically coupled IDT's may include a series IDT to which the phase rotating element is connected and which is connected in series between the input and output terminals, and a branch IDT acoustically coupled to the series IDT, and disposed on a transmission path which branches from a transmission path between the input and output terminals to a reference potential. Among the plurality of IDT's, ?a??b is established, where ?a represents an electrode finger pitch of the IDT to which the phase rotating element is connected, and ?b represents an electrode finger pitch of the IDT to which no phase rotating element is connected.

Abstract: A surface acoustic wave device includes a piezoelectric substrate having Al or Al alloy electrodes formed on a surface of the substrate, a metal oxide film provided on the substrate and the electrodes. The metal oxide film is formed by a process including depositing a metal thin film having a thickness sufficiently thin so that the deposited metal thin film is discontinuous including voids, and oxidizing the discontinuous metal thin film, and the metal oxide film includes a continuous portion without voids covering the electrodes.

Abstract: In a surface acoustic wave device of the invention, a metal oxide layer is formed on the surface of a piezoelectric substrate having electrodes comprising Al or an Al alloy in such a way as to cover at least the electrodes. The metal oxide layer is formed by oxidization of a metal layer thin enough to provide no continuous film. At least a region of the metal layer on the electrodes, wherein the metal layer is present in a discontinuous film form, is so changed by oxidization to a continuous film that more improved effect on prevention of corrosion is achievable. In addition, the provision of the metal oxide layer has no substantial influence on the electrical properties of the surface acoustic wave device.

Abstract: In the electrode of a surface acoustic wave apparatus, the element concentration of copper in the aluminum alloy film is higher in the neighbors of grain boundary than the concentration within the crystal grain, and segregates to the neighbors of crystal grain boundary. In the electrode of this surface acoustic wave apparatus, the concentration of copper existing in the form of copper element, rather than in the form of intermetallic compound of copper and aluminum precipitated to the crystal grain boundary, is higher in the crystal grain boundary than the concentration within the crystal grain, and is in the segregation state. A ratio of a copper concentration in the neighbors of grain boundary to a copper concentration within the crystal grain in an aluminum alloy film forming an electrode of a surface acoustic wave apparatus is greater than 1.6. It is preferable that an electrode formed on a surface of the piezoelectric substrate is made of an aluminum alloy film doped with a copper in a range from 0.