A Generic Surface Micromachining Module for Mems Hermetic Packaging at Temperatures below 200 °c

نویسندگان

  • R. Hellin-Rico
  • J.-P. Celis
  • K. Baert
  • C. Van Hoof
  • A. Witvrouw
چکیده

This paper presents the different processing steps of a new generic surface micromachining module for MEMS hermetic packaging at temperatures around 180°C based on nickel plating and photoresist sacrificial layers. The advantages of thin film caps are the reduced thickness and area consumption and the promise of being a lowcost batch process. Moreover, sealing happens by a reflow technique, giving the freedom of choosing the pressure and atmosphere inside the cavity. Sacrificial etch holes are situated above the device allowing shorter release times compared to the state-of-the-art. With the so-called over-plating process, small etch holes can be created in the membrane without the need of expensive lithography tools. The etch holes in the membrane have been shown to be sufficiently small to block the sealing material to pass through, but still large enough to enable an efficient release.

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تاریخ انتشار 2006