SUBSTRATE POLISH EDGE UNIFORMITY CONTROL WITH SECONDARY FLUID DISPENSE

    公开(公告)号:US20220097198A1

    公开(公告)日:2022-03-31

    申请号:US17038793

    申请日:2020-09-30

    摘要: A method and apparatus for dispensing polishing fluids and onto a polishing pad within a chemical mechanical polishing (CMP) system are disclosed herein. In particular, embodiments herein relate to a CMP system with a first fluid delivery arm and a second fluid delivery arm disposed over the polishing pad to dispense liquid, such as a polishing fluid or water. The first fluid delivery arm is disposed over at least 50% of the radius of the polishing pad, while the second fluid delivery arm is disposed over less than 50% of the radius of the polishing pad. The second fluid delivery arm is configured to dispense either a polishing fluid or a water onto the polishing pad to effect the polishing rate at the edge of the substrate.