Piezoelectric material testing method and apparatus
US4668909A · kind A · utility
9Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 1984 |
| Grant date | May 26, 1987 |
| Priority date | — |
| Expiry date | May 4, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S73/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An arrangement for testing substrate material intended for use in surface acoustic wave devices such as delay lines; the arrangement includes a plurality of electrical and physical evaluations of the material in quantities suitable for a manufacturing environment. In one evaluation acoustic wave energy developed in a tooling jig mounted transducer is mechanically coupled to successive material samples and the resulting output waveforms compared to expected results while in other evaluations the polarized light indicia and chemical reagent determined properties of the material samples are considered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.