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A Novel Fabrication Technique for MEMS Based on Agglomeration of Powder by ALD

: Lisec, T.; Reimer, T.; Knez, M.; Chemnitz, S.; Schulz-Walsemann, A.V.; Kulkarni, A.


Journal of Microelectromechanical Systems 26 (2017), No.5, pp.1093-1098
ISSN: 1057-7157
ISSN: 1941-0158
Journal Article
Fraunhofer ISIT ()

This paper describes a novel fabrication technique for microelectromechanical systems (MEMS) based on the agglomeration of micron-sized powder into rigid 3-D porous structures by means of atomic layer deposition (ALD). Since ALD is performed at low temperatures, such structures can be created from a broad variety of materials. It is shown that the compatibility of substrates with embedded porous structures to common back-end-of-line environment can be regained, and post-processed by applying standard processes of MEMS and integrated circuit technology is possible. In such a way, for the first time, nearly any material can be integrated onto silicon substrates in a simple and generic way. Moreover, not only a particular porosity or internal surface can be targeted. The bulk properties of the structure can be tailored as well, which opens up unique prospects for the future of MEMS.