Patent ID: 7666798
Filing Date: 2010-02-23
Classification: B81B,B81C

Abstract:
1. A method of forming a cavity on a substrate, comprising: forming a first layer of a first type of material on a substrate; forming patterned sacrificial material on the first layer of material, the patterned sacrificial material formed to have sidewalls and a top surface; forming a second layer of the first type of material on the first layer of material and over the patterned sacrificial material to encapsulate the patterned sacrificial material within the first and second layers of material; removing the patterned sacrificial material to form the cavity enclosed within the first and second layers of material; and adding structural support material on the second layer of material that abuts the second layer adjacent the sidewalls of the patterned sacrificial material and extending only to a level of a ton of the second layer on a top side of the cavity.