Backflow reactor liner for protection of growth surfaces and for balancing flow in the growth liner
US9577143B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2013 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Jul 30, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC30B29/40
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A backflow liner in an epitaxial growth system is provided in order to control gas flow and protect the surface of substrates throughout an epitaxial growth cycle. The backflow liner provides critical protection during the warming time prior to substrate pre-treatment, while the growth environment reaches steady state condition between the pre-treatment and the growth process, during pauses between the layer depositions in case of multilayer structure growth, and during the cooling process. The direction of the gas flow through the backflow liner is counter to the deposition gas flows directed from the source end of the growth system. The backflow liner is therefore designed to shape the flow of gases to prevent formation of the vortex-type streams in the growth system that may negatively affect the growth process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.