H - Electricity – 05 – H
Patent
H - Electricity
05
H
H05H 1/30 (2006.01) B05B 7/22 (2006.01) C23C 4/12 (2006.01) H05H 1/42 (2006.01)
Patent
CA 2046145
The invention provides an apparatus for depositing particulate or powder-like material on the surface of a sub- strate. The apparatus comprises a hollow tube-like chamber con- sisting of a heat-resistant material, in which a plasma torch is generated. By means of a device for supplying solid parti- culate or powder-like material, the material is molten in the plasma torch and deposited on the surface of the substrate. In order to achieve a uniform temperature distribution in the plasma torch, the apparatus comprises at least two induction coils located at the outer surface of the hollow tube-like mem- ber and a high frequency generator means having at least two generator sections. A first of the at least two generator sec- tions generates energy with a first higher frequency and a se- cond of the at least two generator sections generates energy with a second lower frequency. One of said at least two induc- tion coils are connected to the first generator section and another one of the at least two induction coils are connected to the second generator section.
Barrigar & Moss
Plasma-Technik Ag
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