发明申请
- 专利标题: SEALED MEMS CAVITY AND METHOD OF FORMING SAME
- 专利标题(中): 密封MEMS密封圈及其形成方法
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申请号: US12979592申请日: 2010-12-28
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公开(公告)号: US20120161255A1公开(公告)日: 2012-06-28
- 发明人: Thomas H. Gabert , Joseph P. Hasselbach , Anthony K. Stamper
- 申请人: Thomas H. Gabert , Joseph P. Hasselbach , Anthony K. Stamper
- 申请人地址: US NY Armonk
- 专利权人: INTERNATIONAL BUSINESS MACHINES CORPORATION
- 当前专利权人: INTERNATIONAL BUSINESS MACHINES CORPORATION
- 当前专利权人地址: US NY Armonk
- 主分类号: H01L29/84
- IPC分类号: H01L29/84 ; H01L21/48
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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