Patent ID: 8906160

Claim:
A vapor deposition tool comprising: a housing; a substrate support positioned within the housing and configured to support a substrate; a backing plate positioned above the substrate support; a showerhead positioned between the substrate support and the backing plate, the showerhead having a plurality of openings therethrough; a fluid trap member positioned around a periphery of the showerhead; and a fluid trap member actuator coupled to the fluid trap member and configured to move the fluid trap member between first and second positions relative to the backing plate, wherein when the fluid trap member is in the first position, a bottom of the fluid trap member is a first distance from the backing plate, the first distance being less than a distance between the backing plate and a top surface of the substrate support, and when the fluid trap member is in the second position, a top of the fluid trap member is a second distance from the backing plate, the second distance being greater than the first distance and greater than a distance between the backing plate and the top surface of the substrate support.