Abstract
Researchers at Oak Ridge National Laboratory (ORNL) are developing selectively coated cantilever arrays in a surface-micromachined MEMS process for very high sensitivities in chemical and biological sensing. Toward this end, we have developed a one-dimensional (1-D) 10-element microcantilever array that we have coated with gold for mercury sensing and palladium for hydrogen sensing. Ultimately we will coat each element with a different coating. Currently, measurements have been performed using a companion analog 1.2-μm CMOS eight channel readout chip also designed at ORNL specifically for the microcantilever arrays. In addition, we have combined our sensors with an ORNL-developed RF-telemetry chip having on-chip spread spectrum encoding and modulation circuitry to improve the robustness and security of sensor data in typical interference- and multipath-impaired environments. We have also provided for a selection of distinct spreading codes to serve groups of sensors in a common environment by the application of code-division multiple-access techniques. Our initial system is configured for use in the 915-MHz Industrial, Scientific, and Medical (ISM) band. The entire package is powered by four AA batteries.
Original language | English |
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Title of host publication | Proceedings - 20th Anniversary Conference on Advanced Research in VLSI, ARVLSI 1999 |
Editors | Stephen P. DeWeerth, D. Scott Wills |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 359-368 |
Number of pages | 10 |
ISBN (Electronic) | 0769500560, 9780769500560 |
DOIs | |
State | Published - 1999 |
Event | 1999 Conference on Advanced Research in VLSI, ARVLSI 1999 - Atlanta, United States Duration: Mar 21 1999 → Mar 24 1999 |
Publication series
Name | Proceedings - 20th Anniversary Conference on Advanced Research in VLSI, ARVLSI 1999 |
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Conference
Conference | 1999 Conference on Advanced Research in VLSI, ARVLSI 1999 |
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Country/Territory | United States |
City | Atlanta |
Period | 03/21/99 → 03/24/99 |
Funding
The authors would like to thank Norma Hensley for her assistance in preparing this manuscript. This research sponsored by the U. S. Department of Energy and performed at Oak Ridge National Laboratory, managed by Lockheed Martin Energy Research, Inc. for the U. S. Department of Energy under Contract No. DE-AC05-96OR22464.