Patent ID: 9610672
Date: 2017-04-04
CPC Classifications: B24B

Claim:
1. A polishing head for chemical mechanical planarization comprising: a housing; a flexible membrane secured to the housing, the flexible membrane comprising an outer surface to contact a substrate and an inner surface facing an interior of the housing; a plurality of pressurizable chambers disposed in the housing and contacting the inner surface of the flexible membrane, the plurality of pressurizable chambers including at least a first pressurizable chamber, a second pressurizable chamber and a third pressurizable chamber; a first pressure delivery channel disposed in the housing and coupled to the first pressurizable chamber; a second pressure delivery channel disposed in the housing and coupled to the third pressurizable chamber; a first pressure feed line disposed in the housing and coupling the first pressure delivery channel to the second pressurizable chamber; a second pressure feed line disposed in the housing and coupling the second pressure delivery channel to the second pressurizable chamber; a first manually movable plug interfaced with the first pressure feed line, the first manually movable plug operable to fluidly couple the first pressure delivery channel to the second pressurizable chamber when in a first position and to fluidly isolate the first pressure delivery channel from the second pressurizable chamber when in a second position; an opening through the housing to enable adjustment of the first manually movable plug; and a second manually movable plug interfaced with the second pressure feed line, the second manually movable plug operable to fluidly couple the second pressure delivery channel to the second pressurizable chamber when in a first position and to fluidly isolate the second pressure delivery channel from the second pressurizable chamber when in a second position.