Invention Grant
- Patent Title: Method for manufacturing a MEMS device by first hybrid bonding a CMOS wafer to a MEMS wafer
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Application No.: US15855449Application Date: 2017-12-27
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Publication No.: US10294098B2Publication Date: 2019-05-21
- Inventor: Hung-Hua Lin , Chang-Ming Wu , Chung-Yi Yu , Ping-Yin Liu , Jung-Huei Peng
- Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
- Applicant Address: TW Hsin-Chu
- Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee Address: TW Hsin-Chu
- Agency: Eschweiler & Potashnik, LLC
- Main IPC: B81B7/00
- IPC: B81B7/00 ; B81C1/00 ; H01L23/00

Abstract:
A microelectromechanical system (MEMS) structure and method of forming the MEMS device, including forming a first metallization structure over a complementary metal-oxide-semiconductor (CMOS) wafer, where the first metallization structure includes a first sacrificial oxide layer and a first metal contact pad. A second metallization structure is formed over a MEMS wafer, where the second metallization structure includes a second sacrificial oxide layer and a second metal contact pad. The first metallization structure and second metallization structure are then bonded together. After the first metallization structure and second metallization structure are bonded together, patterning and etching the MEMS wafer to form a MEMS element over the second sacrificial oxide layer. After the MEMS element is formed, removing the first sacrificial oxide layer and second sacrificial oxide layer to allow the MEMS element to move freely about an axis.
Public/Granted literature
- US20190092627A1 a method for manufacturing a mems device by first hybrid bonding a cmos wafer to a mems wafer Public/Granted day:2019-03-28
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