Invention Grant
- Patent Title: Three-axis accelerometers and fabrication methods
- Patent Title (中): 三轴加速度计和制造方法
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Application No.: US13466595Application Date: 2012-05-08
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Publication No.: US08372677B2Publication Date: 2013-02-12
- Inventor: Mehran Mehregany
- Applicant: Mehran Mehregany
- Applicant Address: US GA Atlanta
- Assignee: Qualtre, Inc.
- Current Assignee: Qualtre, Inc.
- Current Assignee Address: US GA Atlanta
- Agency: Burns & Levinson LLP
- Agent Bruce D. Jobse, Esq.
- Main IPC: H01L21/00
- IPC: H01L21/00 ; G01P15/13

Abstract:
MEMS accelerometers have a substrate, and a proof mass portion thereof which is separated from the substrate surrounding it by a gap. An electrically-conductive anchor is coupled to the proof mass, and a plurality of electrically-conductive suspension anus that are separated from the proof mass extend from the anchor and are coupled to the substrate surrounding the proof mass. A plurality of sense and actuation electrodes are separated from the proof mass by gaps and are coupled to processing electronics. The fabrication methods use deep reactive ion etch bulk micromachining and surface micromachining to form the proof mass, suspension arms and electrodes. The anchor, suspension arms and electrodes are made in the same process steps from the same electrically conductive material, which is different from the substrate material.
Public/Granted literature
- US20120276674A1 Three-Axis Accelerometers and Fabrication Methods Public/Granted day:2012-11-01
Information query
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