TY - GEN
T1 - Fabrication of ultrafloppy single-crystal silicon cantilever for magnetic resonance imaging
AU - Park, J. S.
AU - Lee, D. W.
AU - Gysin, U.
AU - Rast, S.
AU - Meyer, E.
AU - Despont, M.
AU - Gerber, Ch
PY - 2005
Y1 - 2005
N2 - We have proposed a novel fabrication method of the ultrafloppy single-crystal silicon cantilever and evaluated their mechanical properties under several conditions. A spring constant of the fabricated cantilever was less than 0.0001 N/m and minimum detectable force was around 10-16 N at room temperature. With them, we performed the measurement of the vacuum dependent and temperature dependent. First the change of a quality factor was measured as a function of vacuum. A big increase of the quality factor is observed in a range of 1 to 0.1 Pa. The quality factor these cantilever are very high (Q=68840+/-1184) in a high vacuum. In the second experiment we measured the temperature dependent of the resonance frequency and the internal friction. By decreasing the operating temperature, the resonance frequency is slightly increased due to the change of Young's modules. The internal friction is observed the minimum at 20K and the maximum at 160K. The best sensitivity is achieved at 20K, where a factor of 10 is compared to room temperature.
AB - We have proposed a novel fabrication method of the ultrafloppy single-crystal silicon cantilever and evaluated their mechanical properties under several conditions. A spring constant of the fabricated cantilever was less than 0.0001 N/m and minimum detectable force was around 10-16 N at room temperature. With them, we performed the measurement of the vacuum dependent and temperature dependent. First the change of a quality factor was measured as a function of vacuum. A big increase of the quality factor is observed in a range of 1 to 0.1 Pa. The quality factor these cantilever are very high (Q=68840+/-1184) in a high vacuum. In the second experiment we measured the temperature dependent of the resonance frequency and the internal friction. By decreasing the operating temperature, the resonance frequency is slightly increased due to the change of Young's modules. The internal friction is observed the minimum at 20K and the maximum at 160K. The best sensitivity is achieved at 20K, where a factor of 10 is compared to room temperature.
UR - http://www.scopus.com/inward/record.url?scp=33847285032&partnerID=8YFLogxK
U2 - 10.1109/ICSENS.2005.1597688
DO - 10.1109/ICSENS.2005.1597688
M3 - Conference contribution
AN - SCOPUS:33847285032
SN - 0780390563
SN - 9780780390560
T3 - Proceedings of IEEE Sensors
SP - 269
EP - 272
BT - Proceedings of the Fourth IEEE Conference on Sensors 2005
T2 - Fourth IEEE Conference on Sensors 2005
Y2 - 31 October 2005 through 3 November 2005
ER -