Patent ID: 8760034

Claim:
A surface acoustic wave resonator provided on a quartz crystal substrate with Euler angles (−1.5°≦φ≦1.5°, 117°≦θ≦142°, and 41.9°≦|ψ|≦49.57°), comprising: an interdigital transducer (IDT) that excites a stop band upper end mode surface acoustic wave; and an inter-electrode finger groove provided between electrode fingers configuring the IDT, wherein when a wavelength of the surface acoustic wave is λ, a first depth of the inter-electrode finger groove is G, a line occupation rate of the IDT is η, and an electrode film thickness of the IDT is H, λ, G, η and H satisfy the relationship of 0<H≦0.005λ, 0.01λ≦G≦0.09λ, and 0.18≦η≦0.71.