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US 6,310,425 B1Granted
Surface acoustic wave device
AssigneeSanyo Electric Co., Ltd.
InventorNaoki Tanaka
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Abstract
An SAW device including a glass substrate, an LiNbO3 (LN) substrate, and an electrode. When a pitch of the electrode is λ, a thickness of the LN substrate is H, and K equals to 2π/λ, a product of K and H is at least 1.6 and at most 1.8. Accordingly, a SAW device which can advantageously reduced in size and provided with an enhanced temperature characteristic is obtained while ensuring high K2.
Claims2
A surface acoustic wave device, comprising:
- a glass substrate;
- a piezoelectric substrate including LiNbO3 formed on said glass substrate;
- and
- an electrode formed on said piezoelectric substrate,
- wherein a product of K and H is at least 1.6 and at most 1.8 where a pitch of said electrode is λ, a thickness of said piezoelectric substrate is H, and K equals to 2πλ.
2 more elements
Dependencies are inferred from the claim text.