Patent ID: 7303936
Filing Date: 2007-12-04
Classification: B81B

Abstract:
1. A method for forming anti-stiction bumps on a bottom surface of a micro-electro mechanical (MEM) structure, comprising the steps of: providing an assembly, wherein the assembly includes a support substrate bonded to a single-crystal semiconductor layer via an insulator layer; forming a plurality of holes through the single-crystal semiconductor layer to the insulator layer on an interior portion of a defined movable structure; removing a portion of the insulator layer underneath the holes; filling the holes with a conformal film, wherein the conformal film extends below a lower surface of the defined movable structure to provide a plurality of anti-stiction bumps; forming a trench through the single-crystal semiconductor layer to the insulator layer to form the defined movable structure; and removing a remainder of the insulator layer underneath the defined movable structure to free the defined movable structure.