Magnet coil for magnetic czochralski single crystal growth and magnetic czochralski single crystal growth method
US11578423B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2018 |
| Grant date | Feb 14, 2023 |
| Priority date | — |
| Expiry date | Jan 28, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F27/38
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A magnet coil for magnetic Czochralski single crystal growth includes: a first coil, a second coil, and an auxiliary coil arranged between the first coil and the second coil. A distance between the first coil and a first edge of the auxiliary coil close to the first coil is equal to a distance between the second coil and a second edge of the auxiliary coil close to the second coil. The auxiliary coil, the first coil and the second coil have a common central axis. When being energized, a direction of a current in the first coil is opposite to a direction of a current in the second coil, and a magnetic field generated by a current in the auxiliary coil is used for enhancing a cusp magnetic field between the first coil and the second coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.