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The contact resistance performance of gold coated carbon-nanotube surfaces under low current switching

The contact resistance performance of gold coated carbon-nanotube surfaces under low current switching
The contact resistance performance of gold coated carbon-nanotube surfaces under low current switching
Multi-Walled CNT (MWCNT) are synthesized on a silicon wafer and sputter coated with a gold film. The planar surfaces are mounted on the tip of a piezo-electric actuator and mated with a gold coated hemispherical surface to form an electrical contact. These switching contacts are tested under conditions typical of MEMS relay applications; 4V, with a static contact force of 1mN, at a low current between 20-50mA. The failure of the switch is identified by the evolution of contact resistance which is monitored throughout the switching cycles. The results show that the contact resistance can be stable for up to 120 million switching cycles, which are 106 orders of higher than state-of-the-art pure gold contact. Bouncing behavior was also observed in each switching cycle. The failing mechanism was also studied in relation to the contact surface changes. It was observed that the contact surfaces undergo a transfer process over the switching life time, ultimately leading to switching failure the number of bounces is also related to the fine transfer failure mechanism.
carbon nanotubes, contact surface, MEMS switching surface, fine trasfer mechanism, contact resistance
0916-8516
1097-1103
McBride, John W.
d9429c29-9361-4747-9ba3-376297cb8770
Chianrabutra, Chamaporn
f09c1da6-370e-43ac-b9bb-5283633ebadb
Jiang, Liudi
374f2414-51f0-418f-a316-e7db0d6dc4d1
Pu, Suan-Hui
8b46b970-56fd-4a4e-8688-28668f648f43
McBride, John W.
d9429c29-9361-4747-9ba3-376297cb8770
Chianrabutra, Chamaporn
f09c1da6-370e-43ac-b9bb-5283633ebadb
Jiang, Liudi
374f2414-51f0-418f-a316-e7db0d6dc4d1
Pu, Suan-Hui
8b46b970-56fd-4a4e-8688-28668f648f43

McBride, John W., Chianrabutra, Chamaporn, Jiang, Liudi and Pu, Suan-Hui (2013) The contact resistance performance of gold coated carbon-nanotube surfaces under low current switching. IEICE Transactions on Electronics, E96-C (9), 1097-1103. (doi:10.1587/transele.E96.C.1097).

Record type: Article

Abstract

Multi-Walled CNT (MWCNT) are synthesized on a silicon wafer and sputter coated with a gold film. The planar surfaces are mounted on the tip of a piezo-electric actuator and mated with a gold coated hemispherical surface to form an electrical contact. These switching contacts are tested under conditions typical of MEMS relay applications; 4V, with a static contact force of 1mN, at a low current between 20-50mA. The failure of the switch is identified by the evolution of contact resistance which is monitored throughout the switching cycles. The results show that the contact resistance can be stable for up to 120 million switching cycles, which are 106 orders of higher than state-of-the-art pure gold contact. Bouncing behavior was also observed in each switching cycle. The failing mechanism was also studied in relation to the contact surface changes. It was observed that the contact surfaces undergo a transfer process over the switching life time, ultimately leading to switching failure the number of bounces is also related to the fine transfer failure mechanism.

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More information

Published date: 1 September 2013
Additional Information: Invited paper - International Session on Electro-Mechanical Devices 2012 (IS-EMD2012)
Venue - Dates: 12th International Session on Electro-Mechanical Devices (IS-EMD2012), Chiba, Japan, 2012-11-30 - 2012-12-01
Keywords: carbon nanotubes, contact surface, MEMS switching surface, fine trasfer mechanism, contact resistance
Organisations: Mechatronics, Engineering Science Unit

Identifiers

Local EPrints ID: 345832
URI: http://eprints.soton.ac.uk/id/eprint/345832
ISSN: 0916-8516
PURE UUID: 56e47c37-273b-4680-9efe-f3b1149c55ee
ORCID for Liudi Jiang: ORCID iD orcid.org/0000-0002-3400-825X
ORCID for Suan-Hui Pu: ORCID iD orcid.org/0000-0002-3335-8880

Catalogue record

Date deposited: 05 Dec 2012 14:38
Last modified: 26 Nov 2021 03:15

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Contributors

Author: John W. McBride
Author: Chamaporn Chianrabutra
Author: Liudi Jiang ORCID iD
Author: Suan-Hui Pu ORCID iD

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