Rotationally-vibrated unidirectional solidification crystal growth system and its method
US7344598B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2004 |
| Grant date | Mar 18, 2008 |
| Priority date | — |
| Expiry date | Jan 20, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T117/1084
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A rotationally-vibrated unidirectional solidification crystal growth system comprises a furnace, a crucible, a rotational-vibration device including a mounting holder, a motor and a vibrating apparatus. The furnace contains a high temperature portion, a thermal isolation portion and a low temperature portion. The crucible connected to the rotational-vibration device within the furnace has a seed well down to a crystal growth arena. The crystal is grown as the ambient temperature profile moving from high to low, which can be achieved through a relative movement between the furnace and the crucible. That is either the furnace or the crucible is undergoing a top-down movement. The rotational-vibration device offers the crucible the required rotation and angular vibration, with a vibrating frequency no less than 0.2 Hz.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.