Apparatus and method for distributing a polishing fluid
View Patent ↗An apparatus and method for evenly distributing a polishing fluid onto a polishing pad during a chemical mechanical planarization process, wherein the polishing fluid is dispersed by way of a spray being emitted from a spray nozzle. The pattern of polishing fluid applied to the polishing pad can be modified by adjustment of geometric parameters of the spray nozzle. The apparatus is configured with actuating mechanisms for translating and rotating the spray nozzle relative to the polishing pad in order to adjust a pattern of distribution of the polishing fluid. The method of dispersing polishing fluid onto the polishing pad produces an even distribution of polishing fluid across a width of the polishing pad.
1. An adjustable polishing fluid dispensing mechanism for use in chemical mechanical planarization of a semiconductor wafer utilizing a polishing pad, said polishing fluid dispensing mechanism comprising:
a spray nozzle, wherein said spray nozzle includes a mounting member, a main body connected to said mounting member, and a spray tip extending from said main body and said spray tip having an aperture formed therethrough for dispensing a spray of a polishing fluid;
a carrier member, said mounting member being flexibly connected to said carrier member and said flexible connection between said carrier member and said mounting member provides said spray nozzle with rotational movement relative to said carrier member;
a lateral actuating mechanism, said lateral actuating mechanism operatively connected to said carrier member, and said lateral actuating mechanism configured to provide lateral translation of said carrier member relative to said polishing pad;
a vertical actuating mechanism, said vertical actuating mechanism operatively connected to said carrier member, and said vertical actuating mechanism configured to provide vertical translation of said carrier member relative to said polishing pad;
and a longitudinal actuating mechanism, said longitudinal actuating mechanism operatively connected to said carrier member, and said longitudinal actuating mechanism configured to provide longitudinal translation of said carrier member relative to said polishing pad.