Patent ID: 8952596
Filing Date: 2015-02-10
Classification: H03B,H03H

Abstract:
1. A surface acoustic wave resonator provided on a quartz crystal substrate with Euler angles (−1.5°≦φ≦1.5°, 117°≦θ≦142°, and 42.79°≦|ψ|≦49.57°), comprising: an IDT which excites a stop band upper end mode surface acoustic wave; and inter-electrode finger grooves hollowed out of the substrate positioned between electrode fingers configuring the IDT, wherein when the wavelength of the surface acoustic wave is λ and the depth of the inter-electrode finger grooves is G, λ and G satisfy the relationship of and wherein, when the line occupation rate of the IDT is η, the inter-electrode finger groove depth G and line occupation rate η satisfy the relationships of