Patent ID: 7736929
Filing Date: 2010-06-15
Classification: B81B,B81C

Abstract:
1. A method of forming a microshell over a substrate, comprising: depositing a sacrificial material over the substrate; etching a first partial thickness of the sacrificial material with a first mask to define a perimeter trench in the sacrificial material; etching a second partial thickness of the sacrificial material with a second mask to form a protrusion of sacrificial material extending upwards from a top surface of the sacrificial material confined within the perimeter trench and to transfer the perimeter trench through the sacrificial material; forming a pre-sealing layer on the sacrificial layer to cover the protrusion and the perimeter trench, wherein the pre-sealing layer further comprises a getter layer on a permeable layer; perforating the pre-sealing layer to expose the sacrificial layer; removing the sacrificial layer to form a chamber under the pre-sealing layer; and sealing the perforated pre-sealing layer.