发明名称 |
Electrode structure for saw device |
摘要 |
At least two frequencies, one on the higher frequency side and the other on the lower frequency side of a desired frequency, are selected from a predetermined set of frequencies, and stripe widths corresponding to the selected frequencies are combined to realize a desired average stripe width which is used to form an electrode structure of a SAW device. At least one electrode configuration of the SAW device includes an alternate arrangement of electrode stripe and free area stripe and the alternate arrangement is divided into a predetermined number of plural sections within each of which a ratio of the number of stripes of a first width to the number of stripes of a second width is set to a predetermined value. The electrode configuration can be prepared without resort to a highly precise mask and can permit highly precise setting of the center frequencies.
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申请公布号 |
US4507581(A) |
申请公布日期 |
1985.03.26 |
申请号 |
US19830536521 |
申请日期 |
1983.09.28 |
申请人 |
HITACHI, LTD. |
发明人 |
TABUCHI, TOYOJI;HIKITA, MITSUTAKA |
分类号 |
H03H3/08;H03H9/145;H03H9/64;(IPC1-7):H03H9/25 |
主分类号 |
H03H3/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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