Process for producing a strain-free monocrystal of a crystalline ferroelectric compound
US4623423A · kind A · utility
4Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1983 |
| Grant date | Nov 18, 1986 |
| Priority date | — |
| Expiry date | Apr 28, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T117/1088
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The process involves producing a monocrystal from the ferroelectric compound, annealing the monocrystal and cooling the latter in a zero longitudinal temperature gradient. The apparatus comprises means for producing the monocrystal and heating means for annealing the monocrystal in a zero temperature gradient, as well as for cooling the monocrystal in a zero longitudinal temperature gradient after annealing. The strain-free monocrystals may be used in the production of surface wave filters, modulators and optical amplifiers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.