RF plasma processing apparatus
US4802968A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1988 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Jan 29, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J37/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sputtering apparatus for coating a substrate comprising a first electrode for supporting a suitable target material and a second electrode for supporting a substrate, upon which a coating is deposited. A source of RF power is connected to impose an RF voltage across the electrodes to produce a glow discharge in the space between the electrodes. A shield is provided surrounding the peripheral edges and the back of the second electrode, and this shield is spaced a substantial distance from the back of the electrode. Electrical insulating material is placed in the space between the shield and the back of the second electrode with a small gap between the electrical insulating material and the shield. The configuration of the shield, the insulating material, and the second electrode eliminates spurious sputtering from the peripheral and back regions of the second electrode so that very high power levels can be achieved and sputtering can be done very efficiently at high sputtering rates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.