Invention Grant
- Patent Title: Controlling stress in MEMS structures
- Patent Title (中): 控制MEMS结构中的应力
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Application No.: US11698023Application Date: 2007-01-26
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Publication No.: US07670861B2Publication Date: 2010-03-02
- Inventor: Yuko Hanaoka , Tsukasa Fujimori , Hiroshi Fukuda
- Applicant: Yuko Hanaoka , Tsukasa Fujimori , Hiroshi Fukuda
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Stites & Harbison PLLC
- Agent Juan Carlos A. Marquez, Esq.
- Priority: JP2006-026958 20060203
- Main IPC: H01L21/00
- IPC: H01L21/00 ; H01L21/44 ; H01L21/461

Abstract:
The objects of the present invention are to form MEMS structures of which stress is controlled while maintaining the performance of high-performance LSI, to integrate MEMS Structures and LSI on a single chip, to electrically and chemically protect the MEMS structure and to reduce the stress of the whole movable part of the MEMS structure. To achieve the above objects, a silicide film formable at a low temperature is used for the MEMS structure. The temperature at the silicide film deposition T1 is selected optionally with reference the heat treatment temperature T2 and the pseudo-crystallization temperature T3. T2, the temperature of manufacturing process after the silicide film deposition, is determined does not cause the degradation of the characteristics of the high-performance LSI indispensable. Thus, the residual stress of the MEMS structures may be controlled.
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