Method of forming a single crystal sheet using a die having a thermal gradient along its length
US9926645B2 · kind B2 · utility
1Cited by
101References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2017 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Apr 17, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/26
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Various single crystals are disclosed including sapphire. The single crystals have desirable geometric properties, including a width not less than about 15 cm and the thickness is not less than about 0.5 cm. The single crystal may also have other features, such as a maximum thickness variation, and as-formed crystals may have a generally symmetrical neck portion, particularly related to the transition from the neck to the main body of the crystal. Methods and for forming such crystals and an apparatus for carrying out the methods are disclosed as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.