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Proceedings Paper

Status of the development of a 128x128 microshutter array
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Paper Abstract

We are developing a lithography process for a 2D array of microshutters which can be used as a high efficiency, high contrast field selection device for a multi-objects spectrometer for the Next Generation Space Telescope. The device is a close- packed array of shutters with an individual shutter size of 100 micrometers square and area filling factor of about 80 percent, produced in a 100 micrometers thick silicon wafer. Our current array size is 128 by 128. Ech shutter made of silicon nitride with an appropriate optical coating, pivots on a torsion flexure along one edge. A CMOS circuit embedded in the frame around the shutters allows individual selection. An original double-shutter mechanism is employed for actuation. Processing includes anisotropic back etching for wafer thinning, a DRIE back etch through the silicon to the mechanical active nitride membrane and a RIE to produce the shutters out of the nitride membrane. Our layout is based on a detailed mechanical analysis for which we determined crucial material parameters experimentally.

Paper Details

Date Published: 22 August 2000
PDF: 8 pages
Proc. SPIE 4178, MOEMS and Miniaturized Systems, (22 August 2000); doi: 10.1117/12.396500
Show Author Affiliations
Samuel Harvey Moseley, NASA Goddard Space Flight Ctr. (United States)
Rainer K. Fettig, Raytheon ITSS (United States)
Alexander S. Kutyrev, Raytheon ITSS (United States)
Mary J. Li, Raytheon ITSS (United States)
David Brent Mott, NASA Goddard Space Flight Ctr. (United States)
Bruce E. Woodgate, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 4178:
MOEMS and Miniaturized Systems
M. Edward Motamedi; Rolf Goering, Editor(s)

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