Polycrystalline silicon rod and method for processing the same
US7455731B2 · kind B2 · utility
3Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 2006 |
| Grant date | Nov 25, 2008 |
| Priority date | — |
| Expiry date | Dec 20, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2973
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A polycrystalline silicon rod according to present invention has a structure for hanging of polycrystalline silicon rods to each other end-to-end, so that the efficiency of melting polycrystalline silicon can be increased considerably. A polycrystalline silicon rod obtained by entirely or partially removing a peripheral portion from the rod to leave a central portion, and processing the central portion, preferably, the peripheral portion is removed by grinding in an amount corresponding to 10 to 60% of the diameter of the rod, and then subjected to groove-forming processing. This makes annealing unnecessary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.