2018 Volume 138 Issue 8 Pages 387-391
Resonant MEMS sensors such as vibratory gyroscope require wafer-level high vacuum packaging to reduce air damping for enhancing a quality factor. Gettering materials such as titanium which adsorb residual gases in the sealed cavity are generally encapsulated inside a package to achieve higher vacuum. In this paper, we propose titanium thin-film for bonding frame as well as gettering material. Wafer-level high vacuum packaging was achieved by the Ti-Ti bonding when thickness of native oxide on Ti surface is well controlled.
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