发明申请
US20120161255A1 SEALED MEMS CAVITY AND METHOD OF FORMING SAME 审中-公开
密封MEMS密封圈及其形成方法

SEALED MEMS CAVITY AND METHOD OF FORMING SAME
摘要:
Embodiments of the invention provide methods of sealing a micro electromechanical systems (MEMS) cavity and devices resulting therefrom. A first aspect of the invention provides a method of sealing a micro electromechanical systems (MEMS) cavity in a substrate, the method comprising: forming in a substrate a cavity filled with a sacrificial material; forming a lid over the cavity; forming at least one vent hole over the lid extending to the cavity; removing the sacrificial material from the cavity; depositing a first material onto the lid such that a size of at least one vent hole at a surface of the substrate is reduced but not sealed; and depositing a second material onto the first material to seal the at least one vent hole, wherein a MEMS cavity within the substrate and beneath the at least one vent hole substantially retains a pressure at which the at least one vent hole is sealed by the second material.
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