A micro active probe device compatible with SOI-CMOS technologies
In: Journal of microelectromechanical systems, Jg. 6 (1997), Heft 3, S. 242-248
Online
academicJournal
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Zugriff:
A surface-micromachined active probe device with built-in electrostatic actuator and on-chip CMOS circuits is described. The device has been fabricated on a silicon-on-insulator (SOI) substrate using a 0.6-μm CMOS-based process containing four polysilicon layers and one metal layer, and its basic functionality has been verified experimentally. A 0.135-μm-thick surface silicon layer of an SOI substrate was used to form cantilever beams. The very thin structures enable a probe to be turned on at a voltage as low as several volts. A stopper structure, used to avoid contact between a deflector electrode and its paired stator electrode, was formed with a small overlap area of approximately 0.05 μm2. The small overlap area results in a small adhesion force, approximately 70 nN. An n-p-n junction was exploited as an isolator in the probe. A p-n junction in a released beam had only a 5-pA leakage current at a 9-V reverse bias. In addition, it has been found that electrostatic charging is a major source causing unrestorable postrelease stiction.
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A micro active probe device compatible with SOI-CMOS technologies
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Autor/in / Beteiligte Person: | YI, Y.-W ; KONDOH, Y ; IHARA, K ; SAITOH, M |
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Zeitschrift: | Journal of microelectromechanical systems, Jg. 6 (1997), Heft 3, S. 242-248 |
Veröffentlichung: | New York, NY: Institute of Electrical and Electronics Engineers, 1997 |
Medientyp: | academicJournal |
Umfang: | print, 20 ref |
ISSN: | 1057-7157 (print) |
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