| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a transversal type surface acoustic wave device, a surface acoustic wave oscillator, and an electronic apparatus capable of realizing satisfactory frequency temperature characteristics. <P>SOLUTION: A SAW device 10A uses a crystal substrate 30 of an Euler angle (-1°≤ϕ≤1°, 117°≤θ≤142°, 42.79°≤¾ψ¾≤49.57°), and has a groove 32 which has a substrate located between an input IDT 12A, output IDT 12B which excite a SAW of a stop band upper end mode and an electrode finger 18 which constitutes the IDTs recessed, and fulfills 0.01λ≤G in the case where a wavelength of the SAW is set to λ, and a depth of the groove 32 is set to G, and the depth G of the groove 32 and a line occupancy ratio η fulfils a relation of -2.5×G/λ+0.675≤η≤-2.5×G/λ+0.775 in the case where the line occupancy ratio of the IDT is set to η. <P>COPYRIGHT: (C)2012,JPO&INPIT |
