Invention Application
- Patent Title: METHOD OF PREVENTING STICTION OF MEMS DEVICES
- Patent Title (中): 防止MEMS器件的方法
-
Application No.: US13489380Application Date: 2012-06-05
-
Publication No.: US20120313189A1Publication Date: 2012-12-13
- Inventor: Kegang HUANG , Martin LIM , Xiang LI
- Applicant: Kegang HUANG , Martin LIM , Xiang LI
- Applicant Address: US CA Sunnyvale
- Assignee: INVENSENSE, INC.
- Current Assignee: INVENSENSE, INC.
- Current Assignee Address: US CA Sunnyvale
- Main IPC: H01L29/84
- IPC: H01L29/84 ; H01L21/02

Abstract:
A method and apparatus are disclosed for reducing stiction in MEMS devices. The method comprises patterning a CMOS wafer to expose Titanium-Nitride (TiN) surface for a MEMS stop and patterning the TiN to form a plurality of stop pads on the top metal aluminum surface of the CMOS wafer. The method is applied for a moveable MEMS structure bonded to a CMOS wafer. The TiN surface and/or plurality of stop pads minimize stiction between the MEMS structure and the CMOS wafer. Further, the TiN film on top of aluminum electrode suppresses the formation of aluminum hillocks which effects the MEMS structure movement.
Information query
IPC分类: