Ion source
First Claim
1. An ion source, comprising a plasma producing chamber supplied with a gas for producing a plasma through high-frequency electric discharge, first magnetic means provided within said plasma producing chamber for limiting a plasma region defined within said plasma producing chamber, beam extracting means for extracting an ion beam from said plasma producing chamber, a plasma expansion chamber provided in such a manner that said plasma producing chamber is across the plasma expansion chamber from said beam extracting means, and second magnetic means for confining and holding a plasma region having an area larger than that of the plasma region formed within said plasma producing chamber.
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Accused Products
Abstract
An ion source for producing an ion beam utilized for fabrication and processing of semiconductors, thin films or the like includes a plasma producing chamber equipped with first magnetic means for limiting a plasma region and a plasma expansion chamber provided in combination with the plasma producing chamber on the side where a beam extracting electrode is disposed. The plasma expansion chamber is provided with second magnet array for confining and holding a plasma region therein which is of a larger area than that of the plasma region formed in the plasma producing chamber.
42 Citations
10 Claims
- 1. An ion source, comprising a plasma producing chamber supplied with a gas for producing a plasma through high-frequency electric discharge, first magnetic means provided within said plasma producing chamber for limiting a plasma region defined within said plasma producing chamber, beam extracting means for extracting an ion beam from said plasma producing chamber, a plasma expansion chamber provided in such a manner that said plasma producing chamber is across the plasma expansion chamber from said beam extracting means, and second magnetic means for confining and holding a plasma region having an area larger than that of the plasma region formed within said plasma producing chamber.
- 9. An ion source comprising a plasma producing chamber supplied with a gas for producing a plasma through microwave electric discharge, first magnetic means provided in combination with said plasma producing chamber for limiting a plasma region defined within said plasma producing chamber, beam extracting means for extracting an ion beam from said plasma producing chamber, a plasma expansion chamber provided in such a manner that said plasma producing chamber is across the plasma expansion chamber from said beam extracting means, and second magnetic means for confining and holding a plasma region having an area larger than that of the plasma region formed within said plasma producing chamber.
Specification