Acoustic boundary wave device, resonator and filter
AssigneesFujitsu Limited, Fujitsu Media Devices Limited
InventorsMichio Miura, Satoru Matsuda, Takashi Matsuda, Masanori Ueda, Seiichi Mitobe
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Abstract
An acoustic boundary wave device includes a first medium having piezoelectricity, electrodes that are provided on the first medium and excite acoustic waves, a second medium made of a material different from the first medium and provided on the first medium so as to cover the electrodes, and a third medium that has a heat conductivity higher than that of the second medium and is provided so as to contact an upper surface of the second medium and at least a part of side surfaces of the second medium.
Claims12
An acoustic boundary wave device comprising:
- a first medium having piezoelectricity;
- electrodes that are provided on the first medium and excite acoustic waves;
- a second medium made of a material different from the first medium and provided on the first medium so as to cover the electrodes;
- and
- a third medium that has a heat conductivity higher than that of the second medium and is provided so as to contact an upper surface of the second medium and at least a part of side surfaces of the second medium.
A filter comprising resonators, each of which comprising:
- a first medium having piezoelectricity;
- electrodes that are provided on the first medium and excite acoustic waves;
- a second medium made of a material different from the first medium and provided on the first medium so as to cover the electrodes;
- and
- a third medium that has a heat conductivity higher than that of the second medium and is provided so as to contact an upper surface of the second medium and at least a part of side surfaces of the second medium.
Dependencies are inferred from the claim text.