SEMICONDUCTOR ARRANGEMENT WITH STRESS RELEASE CONFIGURATION
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United States of America Patent
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Aug 25, 2015
Grant Date -
Sep 10, 2015
app pub date -
Mar 7, 2014
filing date -
Mar 7, 2014
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Abstract
Among other things, one or more semiconductor arrangements and techniques for forming such semiconductor arrangements are provided herein. A semiconductor arrangement comprises a cap wafer, a microelectromechanical systems (MEMS) wafer, and a complementary metal-oxide-semiconductor (CMOS) wafer. The cap wafer comprises a first spring structure and the MEMS wafer comprises a second spring structure. The first spring structure and the second spring structure relieve stress as portions of the semiconductor arrangement, such as a membrane and a poly layer, move. An ambient pressure chamber is formed between the CMOS wafer and the MEMS wafer as a thermal insulation air gap to protect the MEMS wafer from heat originating from the CMOS wafer. The ambient pressure chamber is connected to ambient air, such as for CMOS outgassing relief.
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