IP Library Granted Patent US 8,247,955
Granted Patent B2
US 8,247,955 · App. 12/445,507 · Granted Aug 21, 2012

Electroacoustic component

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Quick Facts
Patent No.
US 8,247,955
App. No.
12/445,507
Granted
Aug 21, 2012
Kind
B2
Abstract

An electroacoustic component includes a substrate that includes a quartz single crystal. The quartz single crystal has a first Euler angle λ: −5°≦λ≦5°, a second Euler angle μ, and a third Euler angle θ. A contiguous region of the quartz single crystal has the following vertices P i (μ i , θ i ): (23°, 20°), (60°, 17°), (110°, 30°), (105°, 42°), (60°, 30°), (23°, 25°).

Claims (24)

1. An electroacoustic component comprising:

a substrate comprising a quartz single crystal, the quartz single crystal having a first Euler angle λ, second Euler angle μ, and third Euler angle θ, the first, second and third Euler angles being in the following ranges:

28°≦λ≦32°, |μ−90°|>5°, and 135°≦θ≦160°.

2. The electroacoustic component of claim 1 , wherein:

20°<|μ−90°|<55°.

3. The electroacoustic component of claim 1 , wherein:

λ=30°, 25°<|μ−90°|<34° and 146°≦θ≦153°.

4. An electroacoustic component comprising:

a substrate comprising a quartz single crystal, the quartz single crystal having a first Euler angle λ: 5°≦λ≦28°, a second Euler angle μ: 40°<μ≦140°, and a third Euler angle θ: 135°≦θ≦160°.

5. The electroacoustic component of claim 4 , wherein:

7°≦λ≦13°, 122°≦μ≦128° and 137°≦θ≦143°.

6. The electroacoustic component of claim 4 , wherein:

5°≦λ≦28°, 60°≦μ≦75° and 147°≦θ≦160°.

7. The electroacoustic component of claim 6 , wherein:

14°≦λ≦21°.

8. The electroacoustic component of claim 4 , further comprising:

electrodes, on the substrate, for exciting an acoustic wave having a wavelength λ 0 .

9. The electroacoustic component of claim 8 , wherein the electrodes comprise metallic aluminum.

10. The electroacoustic component of claim 9 , wherein a weight proportion of aluminum in the electrodes is at least 80%.

11. The electroacoustic component of claim 8 , wherein a height of the electrodes relative to the wavelength is at most 2.5%; and

wherein an acoustic reflection at the electrodes is at least 1%.

12. The electroacoustic component of claim 8 , wherein a height of the electrodes relative to the wavelength is at most 4%.

13. The electroacoustic component of claim 4 , wherein a magnitude of a quadratic temperature coefficient associated with the electroacoustic component does not exceed 2×10 −8 /K 2 .

14. The electroacoustic component of claim 4 , comprising a resonator comprising a transducer in which an acoustic wave is excitable electrically.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 2, 2017
From: EPCOS AG
To: SNAPTRACK, INC.
Reel/Frame 041608/0145 →
CORRECTIVE ASSIGNMENT TO CORRECT THE INSIDE ASSIGNMENT DOCUMENT. PREVIOUSLY RECORDED AT REEL: 023728 FRAME: 0784. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT . Recorded May 20, 2016
From: RÖSLER, ULRIKE; RIHA, EVELYN; RUILE, WERNER
To: EPCOS AG
Reel/Frame 038771/0267 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 4, 2010
From: ROESLER, ULRIKE; RIHA, EVELYN; RUILE, WERNER
To: EPCOS AG
Reel/Frame 023728/0784 →