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US 6,310,424 B1Granted
Surface acoustic wave device
AssigneeSanyo Electric Co., Ltd.
InventorsMorio Ogura, Naoki Tanaka
Life of this patent
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Abstract
An SAW device including a glass substrate, an LiNbO3 (LT) substrate, and an electrode. When a pitch of the electrode is λ, a thickness of the LT substrate is H, and K equals to 2π/λ, a product of K and H is at least 0.5 and at most 1.5. Accordingly, a SAW device which can advantageously reduced in size by a reduction in propagation velocity and which is provided with high K2 and an enhanced temperature characteristic as having a good temperature characteristic of the LT substrate.
Claims2
A surface acoustic wave device, comprising:
- a glass substrate;
- a piezoelectric substrate including LiTaO3 formed on said glass substrate;
- and
- an electrode formed on said piezoelectric substrate,
- wherein a product of K and H is at least 0.5 and at most 1.5, and
- wherein a pitch of said electrode is λ, a thickness of said piezoelectric substrate is H, and K equals 2π/λ.
3 more elements
Dependencies are inferred from the claim text.