title: The pressure sensitivity of wrinkled B-doped nanocrystalline diamond membranes.
abstract: Nanocrystalline diamond (NCD) membranes are promising candidates for use as sensitive pressure sensors. NCD membranes are able to withstand harsh conditions and are easily fabricated on glass. In this study the sensitivity of heavily boron doped NCD (B:NCD) pressure sensors is evaluated with respect to different types of supporting glass substrates, doping levels and membrane sizes. Higher pressure sensing sensitivities are obtained for membranes on Corning Eagle 2000 glass, which have a better match in thermal expansion coefficient with diamond compared to those on Schott AF45 glass. In addition, it is shown that larger and more heavily doped membranes are more sensitive. After fabrication of the membranes, the stress in the B:NCD films is released by the emergence of wrinkles. A better match between the thermal expansion coefficient of the NCD layer and the underlying substrate results in less stress and a smaller amount of wrinkles as confirmed by Raman spectroscopy and 3D surface imaging.
authors: Institute for Materials Research (IMO), Hasselt University, Diepenbeek, Belgium.|IMOMEC, IMEC vzw, Diepenbeek, Belgium.
authors: S
authors: S
authors: Drijkoningen
authors: Institute for Materials Research (IMO), Hasselt University, Diepenbeek, Belgium.|IMOMEC, IMEC vzw, Diepenbeek, Belgium.|National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, Japan.
authors: S D
authors: SD
authors: Janssens
authors: Institute for Materials Research (IMO), Hasselt University, Diepenbeek, Belgium.
authors: P
authors: P
authors: Pobedinskas
authors: National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, Japan.|Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), c/o AIST, Tsukuba, Ibaraki, Japan.
authors: S
authors: S
authors: Koizumi
authors: Institute for Materials Research (IMO), Hasselt University, Diepenbeek, Belgium.|IMOMEC, IMEC vzw, Diepenbeek, Belgium.
authors: M K
authors: MK
authors: Van Bael
authors: Institute for Materials Research (IMO), Hasselt University, Diepenbeek, Belgium.|IMOMEC, IMEC vzw, Diepenbeek, Belgium.
authors: K
authors: K
authors: Haenen