| Original document(32 pages) 中文版 |
A SAW device employing a quartz substrate having device size smaller than that of conventional structure and exhibiting a high Q and excellent frequency-temperature characteristics. An IDT (2) consisting of a plurality of interdigital electrode fingers is mounted on a piezoelectric substrate (1) and grating reflectors (3a, 3b) are arranged on the both sides of the IDT (2). The piezoelectric substrate (1) is a flat quartz plate where the cut angle theta of a rotary Y-cut quartz substrate is set in the range of -64.0 1/2 < theta < -49.3 1/2 in the counter clockwise direction from the crystal Z-axis and the propagating direction of surface acoustic wave is set at 90 DEG +-5 DEG with respect to the crystal X-axis, and the exciting acoustic wave is SH wave. The IDT (2) and the reflectors (3a, 3b) are composed of Al or an alloy principally comprising Al and the electrode film thickness standardized by wavelength H / lambda is set in the range of 0.04 < H / lambda < 0.12, where lambda is the wavelength of surface acoustic wave. |
Application Number
申请号 |
200580010886 |
Application Date
申请日 |
2005.03.08 |
| Title 名称 |
Surface acoustic wave device |
Publication Number
公开号 |
1943109 |
Publication Date
公开日 |
2007.04.04 |
| Approval Pub. Date |
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Granted Pub. Date |
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| International Classification 分类号 |
H03H9/145;H03H3/10;H03H9/25;H03H9/64 |
Applicant(s) Name
申请人 |
Toyo Comm Equipment Co., Ltd. |
| Address 地址 |
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| Inventor(s) Name 发明人 |
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| Attorney & Agent 代理人 |
lihui |
| More information 更 多 信 息 |
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