Applied Materials, Inc.
METHODS AND APPARATUS FOR CONTACTLESS SUBSTRATE WARPAGE CORRECTION

Abstract:

Embodiments of methods and apparatus for reducing warpage of a substrate are provided herein. In some embodiments, a method for reducing warpage of a substrate includes heating the substrate with an epoxy layer to at least a glass transition temperature of the epoxy layer while allowing the substrate to expand; subsequently constraining the substrate with a clamping force exerted towards the substrate from a top direction by applying a high pressure gas to the substrate and from a bottom direction by applying a vacuum pressure to the substrate; and rapidly cooling the substrate while the substrate is constrained.