Surface acoustic wave device and method of making same

Patent 3978436 Issued on August 31, 1976. Estimated Expiration Date:

August 31, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Piezoelectrically driven optical grating assemblies Patent #: 3942048
Issued on: 03/02/1976
Inventor: Laude , et al.

Inventors

Assignee

RCA Corporation

Application

No. 05/630761 filed on 11/10/1975

US Classes:

333/154, Significant transmitting or receiving transducer structure29/25.35, PIEZOELECTRIC DEVICE MAKING310/313RSurface acoustic wave devices

Examiners

Primary: Smith, Alfred E.
Assistant: Nussbaum, Marvin L.

Attorney, Agent or Firm

International Classes

H03H 3/08 (20060101)
H03H 3/00 (20060101)
H03H 9/02 (20060101)
H03H 9/145 (20060101)

Abstract

A piezoelectric body has a transducer on one surface. The transducer includes an electrically insulating body on the piezoelectric body; the electrically insulating body has a surface relief pattern on a surface which is opposite the piezoelectric body. An electrically conductive layer is on the electrically insulating body on the surface having the relief pattern thereon.The transducer can be formed by means of a master body. A surface of the master body, having a relief pattern thereon, is pressed against the electrically insulating body to form a relief pattern on the electrically insulating body. The electrically conductive layer is then formed on the electrically insulating body on the surface having the relief pattern thereon.

Other References

Carr-"The Generation and Propagation of Acoustic Surface Waves at Microwave Frequencies" in IEEE Transactions on Microwave Theory and Techniques vol. MTT-17, No. 11, Nov. 1969; pp. 845-855