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US 2009/0212659 A1Published application
Elastic boundary wave device
AssigneesFujitsu Media Decices Limited, Fujitsu Limited
InventorsSatoru MATSUDA, Michio Miura, Takashi Matsuda, Masanori Ueda
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Abstract
An elastic boundary wave device includes a first medium with piezoelectricity, an electrode exciting an elastic wave and provided on the first medium, a second medium made of a different material from the first medium and provided on the first medium to cover the electrode, and a sound absorbing portion provided on the second medium.
Claims14
An elastic boundary wave device comprising:
- a first medium with piezoelectricity;
- an electrode exciting an elastic wave and provided on the first medium;
- a second medium made of a different material from the first medium and provided on the first medium to cover the electrode;
- and
- multiple protrusions provided on the second medium,
- wherein the multiple protrusions have a different periodicity from the electrode.
3 more elements
An elastic boundary wave device comprising:
- a first medium with piezoelectricity;
- an electrode exciting an elastic wave and provided on the first medium;
- a second medium made of a different material from the first medium and provided on the first medium to cover the electrode;
- and
- multiple protrusions provided on the second medium,
- wherein multiple protrusions are provided on an irregular basis.
3 more elements
Dependencies are inferred from the claim text.