Aluminum nitride single crystals having controllable color and methods of forming them
US11840773B1 · kind B1 · utility
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20Claims
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Key dates
| Filing date | Dec 8, 2021 |
| Grant date | Dec 12, 2023 |
| Priority date | — |
| Expiry date | May 24, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC30B33/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
In various embodiments, single-crystal aluminum nitride boules and substrates are highly visibly transparent and have low Urbach energies and/or absorption coefficients at deep-ultraviolet wavelengths. The single-crystal aluminum nitride may function as a platform for the fabrication of light-emitting devices such as light-emitting diodes and lasers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.