Physics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001spie.4561..163m&link_type=abstract
Proc. SPIE Vol. 4561, p. 163-170, MOEMS and Miniaturized Systems II, M. Edward Motamedi; Rolf Goering; Eds.
Physics
1
Scientific paper
Two-dimensional microshutter arrays are being developed at NASA Goddard Space Flight Center (GSFC) for the Next Generation Space Telescope (NGST) for use in the near-infrared region. Functioning as focal plane object selection devices, the microshutter arrays are 2-D programmable masks with high efficiency and high contrast. The NGST environment requires cryogenic operation at 45 K. Arrays are close-packed silicon nitride membranes with a unit cell size of 100x100 micrometer. Individual shutters are patterned with a torsion flexure permitting shutters to open 90 degrees with minimized mechanical stress concentration. The mechanical shutter arrays are fabricated with MEMS technologies. The processing includes a RIE front-etch to form shutters out of the nitride membrane, an anisotropic back-etch for wafer thinning, and a deep RIE (DRIE) back-etch down to the nitride shutter membrane to form frames and to relieve the shutters from the silicon substrate. A layer of magnetic material is deposited onto each shutter. Onto the side-wall of the support structure a metal layer is deposited that acts as a vertical hold electrode. Shutters are rotated into the support structure by means of an external magnet that is swept across the shutter array for opening. Addressing is performed through a scheme using row and column address lines on each chip and external addressing electronics.
Aslam Shahid
Blumenstock Kenneth A.
Fettig Rainer K.
Franz David E.
Kutyrev Alexander S.
No associations
LandOfFree
Magnetically actuated microshutter arrays does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Magnetically actuated microshutter arrays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetically actuated microshutter arrays will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1008086