| 摘要 |
PROBLEM TO BE SOLVED: To further improve operation precision of a spherical surface acoustic wave element, and further improve the operation precision of various devices using the spherical surface acoustic wave element as a result. SOLUTION: In the spherical surface acoustic wave element 10, a center C of an electroacoustic transducer 22 is in a range of 15 degree or less with respect to a linearly extending direction of an outer circle line 14 of the maximum diameter from a cross point with +Y crystal axis in a surface area 16, further, when crystal or langasite is dextrorotatory, the center C of the electroacoustic transducer 22 is in a position rotated by an angle of 1 degree or more and 3 degree or less in +Z direction with respect to the outer circle line 14 of the maximum diameter from the cross point with the +Y crystal axis in the surface area 16, on the other hand, when the crystal or the langasite is levorotatory, the center C of the electroacoustic transducer 22 is in a position rotated by an angle of 1 degree or more and 3 degree or less in -Z direction with respect to the outer circle line 14 of the maximum diameter from the cross point with the +Y crystal axis in the surface area 16. COPYRIGHT: (C)2011,JPO&INPIT
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