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Chip-scale integrated driver for electrostatic DM control
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Paper Abstract

A CMOS electronics driver chip to control a deformable MEMS mirror has been developed. With the advances in CMOS technology, it has become possible to design and fabricate electronics operable at higher voltages than those in traditional integrated circuits. Since MEMS structures require relatively high operating voltages to achieve electrostatic force, these high voltage CMOS processes offer promise for miniaturization of the corresponding drivers. Using the capability of low voltage logic together with high voltage output stages, a compact driver chip has been designed and fabricated. The chip was developed and fabricated though a high voltage CMOS process. The driver is digitally controlled through address and data input bits, and through a smart low-voltage to high-voltage transition output stage, voltages of up to 300V are output to each mirror electrode. A compact design allows the control of 144 channels through a single chip with 8-bit resolution at 100Hz refresh rate. The low-voltage stage consists of address logic together with latch stages to store the data, which in turn is converted to a high voltage signal through a current mode, binary weighted scheme. This technique combines the digital-to-analogue conversion stage and a high-voltage amplifier stage, thus saving on substrate area. Using this method, the 144 channel high-voltage driver was fabricated on a single chip less than 3.5cm2 in area. In this paper, design, fabrication and testing of these drivers are reported.

Paper Details

Date Published: 23 January 2006
PDF: 9 pages
Proc. SPIE 6113, MEMS/MOEMS Components and Their Applications III, 61130X (23 January 2006); doi: 10.1117/12.651328
Show Author Affiliations
Duk Joong Kim, Boston Univ. (United States)
Thomas Bifano, Boston Univ. (United States)
Steven Cornelissen, Boston Micromachines Corp. (United States)
Allyn E. Hubbard, Boston Univ. (United States)

Published in SPIE Proceedings Vol. 6113:
MEMS/MOEMS Components and Their Applications III
Scot S. Olivier; Srinivas A. Tadigadapa; Albert K. Henning, Editor(s)

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