Labyrinth seal for bearing in brush mounting assembly for semiconductor wafer scrubber

摘要

A wafer scrubbing unit includes a mounting assembly for a scrubber brush. The mounting assembly has a rotary flow through tube through which cleaning liquid is delivered to the brush. A stationary tube may be mounted in the bore of the rotary tube. Spinning shields mounted on the rotary tube form labyrinth seals to protect a bearing housing from the cleaning liquid. Bearings for rotatably mounting the rotary tube are mounted within the housing.