Patent · US Expired

Method and apparatus for the permanent polarization of piezoelectric bodies

US4088917A · kind A · utility

5Cited by

6References

4Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Erwin Martin · Munich, DE
Helmut Hoffmann
Otto Brunnert

Key dates

Filing date	Apr 8, 1976
Grant date	May 9, 1978
Priority date	—
Expiry date	Apr 8, 1996

Classification

Technology area (CPC H)Electricity
CPC primaryH10N30/045
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method and apparatus for processing piezoelectric bodies to have a permanent polarization for use as electroacoustic transducers or the like are described. During the application of a constant polarizing electric field to a piezoelectric body, the surfaces of the body, which for example, might be in the shape of a disc, have applied thereto a surface pressure. A clamping device having smooth surfaces is used for this purpose.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.