Patent ID: 9530629
Filing Date: 2016-12-27
CPC Classification: C23C,H01J

Claim Text:
1. A method for controlling the application of a multilayered coating onto at least one substrate in a coating chamber, said method comprising: positioning a plurality of unbalanced magnetrons with targets of material to be deposited in the coating chamber to face towards a substrate holder in the chamber, interposing between the substrate holder and the magnetrons, first and second shields, providing in said shields at least one aperture which, when selectively positioned with respect to a magnetron, allows material deposited from the magnetron target to pass therethrough and onto the substrates and characterised in that the shields are rotated during magnetron activation, with the movement of one or both of the shields being continuous at a selected speed which can be varied or fixed to suit particular coating requirements, so as to move and position the respective apertures to define a passage for selected periods of time to allow the passage of material deposited from a magnetron target and then to move the shields to repeat the same as required with respect to the first and second magnetrons as required to apply the multilayered coating onto the substrates, and arranging the magnetrons in a closed field unbalanced magnetron (CFUBM) configuration with adjacent unbalanced magnetrons have outer magnetic assemblies of opposite polarity; wherein the shields and substrates are provided at floating electrical potential during the coating application and the speed of rotation of the shields is independently controlled.