High-density plasma-processing tool with toroidal magnetic field
US5505780A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1992 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Mar 18, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S156/914
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high-density plasma-processing reactor with a processing chamber configuration which closes upon itself. The reactor applies a toroidal magnetic field to the plasma discharge which creates magnetic field lines which close upon themselves thereby preventing the magnetized plasma electrons traveling along these magnetic field lines from diffusing to the chamber wall or adjacent magnetic field lines. This electron confinement scheme is expected to result in a plasma density in the 10.sup.12 to 10.sup.13 cm.sup.-3 range. The high density plasma processing reactor includes a plasma processing chamber which forms an enclosed configuration mounted within a plurality of toroidal solenoid coils and containing a plurality of plasma source regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.