Invention Grant
- Patent Title: Vibration sensor and method for manufacturing the vibration sensor
- Patent Title (中): 振动传感器及制造振动传感器的方法
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Application No.: US12440127Application Date: 2007-07-20
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Publication No.: US07943413B2Publication Date: 2011-05-17
- Inventor: Takashi Kasai , Yasuhiro Horimoto , Fumihito Kato , Masaki Munechika , Shuichi Wakabayashi , Toshiyuki Takahashi , Masayuki Inuga
- Applicant: Takashi Kasai , Yasuhiro Horimoto , Fumihito Kato , Masaki Munechika , Shuichi Wakabayashi , Toshiyuki Takahashi , Masayuki Inuga
- Applicant Address: JP Kyoto
- Assignee: OMRON Corporation
- Current Assignee: OMRON Corporation
- Current Assignee Address: JP Kyoto
- Agency: Osha • Liang LLP
- Priority: JP2006-280648 20061013
- International Application: PCT/JP2007/064368 WO 20070720
- International Announcement: WO2008/044381 WO 20080417
- Main IPC: H01L29/84
- IPC: H01L29/84 ; H01L21/28

Abstract:
A method for manufacturing a vibration sensor including forming a sacrifice layer at one part of a front surface of a semiconductor substrate of monocrystalline silicon with a material isotropically etched by an etchant for etching the semiconductor substrate, forming a thin film protective film with a material having resistance to the etchant on the sacrifice layer and the front surface of the semiconductor substrate at a periphery of the sacrifice layer, forming a thin film of monocrystalline silicon, polycrystalline silicon, or amorphous silicon on an upper side of the sacrifice layer, opening a backside etching window in a back surface protective film having resistance to the etchant for etching the semiconductor substrate formed on a back surface of the semiconductor substrate, forming a through-hole in the semiconductor substrate by etching the semiconductor substrate anisotropically by using crystal-oriented etching by applying the etchant from the back surface window, then etching the sacrifice layer isotropically by the etchant after the etchant reaches the front surface of the semiconductor substrate, and then etching the semiconductor substrate anisotropically by using crystal-oriented etching from a front side by the etchant spread to a space formed after the sacrifice layer is removed, and forming a holder for supporting the thin film on an upper surface of the semiconductor substrate by removing the thin film protective film partially.
Public/Granted literature
- US20100038734A1 VIBRATION SENSOR AND METHOD FOR MANUFACTURING THE VIBRATION SENSOR Public/Granted day:2010-02-18
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