Patent ID: 7988813
Filing Date: 2011-08-02
Classification: H01J,Y10T

Abstract:
1. A focus-ring configured to surround a peripheral edge of a substrate in a vacuum processing system, comprising: a ring having an upper surface and a lower surface; a plurality of gas distribution passages, each of the plurality being coupled to the lower surface of said ring, each of the plurality of gas distribution passages being configured to further couple to one or more corresponding gas supply passages within an upwardly facing substrate holder when said ring is made to rest upon said substrate holder to supply an additive process gas from said substrate holder to said plurality of gas plenums; a plurality of separate and distinct gas plenums distributed circumferentially within said ring between the upper surface and the lower surface, each of the plurality of separate and distinct gas plenums being respectively coupled to at least one correspondingly separate and distinct one of the plurality of gas distribution passages; a plurality of gas injection orifices distributed circumferentially in the upper surface of the ring, each of the plurality of gas plenums being coupled to a separate and distinct plurality of gas injection orifices wherein the gas injection orifices of each separate and distinct plurality are arranged to distribute the additive process gas from the plurality of gas plenums to which they are coupled to a corresponding separate one of a plurality of regions above the upper surface and distributed circumferentially around said peripheral edge of the substrate when supported and centered on said substrate holder; an upwardly facing substrate holder having the one or more corresponding gas supply passages therein, the ring resting thereon; and an additive gas supply system coupled to the one or more corresponding gas supply passages and configured to control the supply of said additive process gas differently to different ones of said corresponding gas supply passages to vary the distribution of said additive process gas differently to different ones of the corresponding separate ones of the plurality of regions above the upper surface of the ring to affect the introduction across a surface of the substrate, wherein said ring comprises an upper portion and a lower portion, said upper portion and said lower portion being machined to form said plurality of gas distribution passages therein and being bonded together using a bonding agent.