Invention Grant
- Patent Title: Method for producing packaged MEMS assemblies at the wafer level, and packaged MEMS assembly
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Application No.: US15975243Application Date: 2018-05-09
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Publication No.: US10584028B2Publication Date: 2020-03-10
- Inventor: Matthias Steiert , Christian Geissler , Karolina Zogal
- Applicant: Infineon Technologies AG
- Applicant Address: DE Neubiberg
- Assignee: INFINEON TECHNOLOGIES AG
- Current Assignee: INFINEON TECHNOLOGIES AG
- Current Assignee Address: DE Neubiberg
- Agency: Slater Matsil, LLP
- Priority: DE102017207887 20170510
- Main IPC: B81C1/00
- IPC: B81C1/00 ; H01L23/31 ; B32B15/04 ; B81B7/00

Abstract:
A production method includes providing a semiconductor substrate with a wiring layer stack having cutouts on a first main surface region of the semiconductor substrate at which MEMS components are arranged in an exposed manner in the cutouts and projecting through contact elements are arranged at metallization regions of the wiring layer stack; applying a b-stage material layer cured in an intermediate stage on the wiring layer stack, such that the cutouts are covered by the b-stage material layer and the vertically projecting through contact elements are introduced into the b-stage material layer; curing the b-stage material layer to obtain a cured b-stage material layer; thinning the cured b-stage material layer; and applying a redistribution layer (RDL) structure on the thinned, cured b-stage material layer to obtain an electrical connection between the wiring layer stack and the RDL structure via the through contact elements.
Public/Granted literature
- US20180327258A1 METHOD FOR PRODUCING PACKAGED MEMS ASSEMBLIES AT THE WAFER LEVEL, AND PACKAGED MEMS ASSEMBLY Public/Granted day:2018-11-15
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