Patent ID: 7670861
Filing Date: 2010-03-02
Classification: B81C,G01L,H01L

Abstract:
1. A manufacturing method of microelectromechanical system (MEMS) structures with semiconductor devices, comprising the steps of: fabricating an electronic circuit on a substrate; fabricating back-end of line layers on said electronic circuit; fabricating a lower electrode connected with said back-end of line layers; fabricating a sacrificial layer out of silicon oxide on said lower electrode; fabricating movable electrode parts of MEMS structures out of a first silicide or a metal within a plurality of etching holes on said sacrificial layer; wherein peripheral areas of said movable electrode parts are fixed, removing said sacrificial layer by injecting hydrofluoric acid into said etching holes; fabricating a silicon oxide film on said movable electrode parts to close said etching holes; fabricating a silicon nitride film on said silicon oxide film; fabricating a shield film made of a second silicide on said silicon nitride film; wherein peripheral areas of said shield film are fixed, and fabricating a photosensitive polyimide film on said silicon nitride film; wherein said MEMS structures, including said movable electrode parts and said shield film being formed by implementing a sputtering method at a film-fabricating heat treatment temperature T wherein said pseudo-crystallization temperature range T