Patent ID: 7563635

Claim:
A method of fabricating an electronic device comprising the steps of: (a) preparing a substrate on which part of the electronic device is disposed, and forming a sacrificial layer which covers the part of the electronic device on a selected region of the substrate; (b) forming a cavity-wall film which covers a top face and a side face of the sacrificial layer on the substrate; (c) forming at least one opening which runs through the cavity-wall film, the opening extending along the side face of the sacrificial layer and edges of the opening in contact with the side face of the sacrificial layer, wherein the opening is formed to have a shape which is wider in an upper portion and narrower in a lower portion; (d) selectively etching at least part of the sacrificial layer via the opening, thereby forming a cavity surrounding the part of the electronic device; and (e) forming a sealing member for closing the opening by sputtering.