Patent ID: 8647437

Claim:
A coating tool for fabrication of an annular or a circular wedged coating on a substrate, the tool comprising: a) at least one deposition source; b) a planet carrier adapted to carry at least one substrate, the at least one substrate having a single mask associated therewith, the single mask having an aperture and positioned coaxially with the substrate in a substrate-single mask assembly; c) a first motor rotatably coupled to the planet carrier to impart the planet carrier a first rotation; d) a second motor rotatably coupled to the single mask and operative to impart the single mask a second rotation independent of the first rotation to enable a relative rotation between the single mask and the substrate around a common rotation axis, wherein the aperture is configured to allow material ejected from the at least one deposition source to reach a predetermined section of the substrate and be deposited thereon, and wherein the relative rotation is controllable to provide an annular or circular wedged coating on a substrate circumference; and e) a controller for controlling the relative rotation.