发明名称 |
Surface acoustic wave resonator, surface acoustic wave oscillator, and electronic instrument |
摘要 |
A SAW resonator which, using a quartz crystal substrate with Euler angles (−1.5°≦φ≦1.5°, 117°≦θ≦142°, and 42.79°≦|105|≦49.57°, includes an IDT which excites a stop band upper end mode SAW, and grooves hollowed out of the substrate positioned between electrode fingers configuring the IDT, wherein, when the wavelength of the SAW is λ and the depth of the inter-electrode finger grooves is G, λ and G satisfy the relationship of 0.01λ≦G and wherein, when the line occupation rate of the IDT is η, the groove depth G and line occupation rate η satisfy the relationships of −2.0000×G/λ+0.7200≦η≦−2.5000×G/λ+0.7775 provided that 0.0100λ≦G≦0.0500λ, −3.5898×G/λ+0.7995≦η≦−2.5000+G/λ+0.7775 provided that 0.0500λ<G≦0.0695λ. |
申请公布号 |
US8760033(B2) |
申请公布日期 |
2014.06.24 |
申请号 |
US201012713461 |
申请日期 |
2010.02.26 |
申请人 |
Seiko Epson Corporation |
发明人 |
Yamanaka Kunihito |
分类号 |
H03H9/25 |
主分类号 |
H03H9/25 |
代理机构 |
Harness, Dickey & Pierce, P.L.C. |
代理人 |
Harness, Dickey & Pierce, P.L.C. |
主权项 |
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
0.01λ≦G 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
−2.0000×G/λ+0.7200≦η≦−2.5000×G/λ+0.7775provided that0.0100.1λ≦G≦0.0500λ−3.5898×G/λ+0.7995≦η≦−2.5000×G/λ+0.7775provided that0.0500λ<G≦0.0695λ.
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地址 |
JP |