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A flexible, highly-sensitive, and easily-fabricated carbon-nanotubes tactile sensor on polymer substrate

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6 Author(s)
ChiaHua Ho ; Nat. Nano Device Labs., Hsinchu, Taiwan ; Wang-Shen Su ; Chih-Fan Hu ; Chia-Min Lin
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A flexible, highly-sensitive, and easily fabricated carbon nanotubes (CNTs) tactile sensor is reported in this paper. CNTs are grown and patterned on bulk-micromachined silicon substrate with 3-dimensional surface profile. After polymer molding, the CNTs with 3-dimensional distribution are successfully transferred onto a flexible PDMS with 3-dimensional tactile-bump. Advantages of presented tactile sensor are (1) exactly determine loading force by resistance change due to almost linearly current-voltage (I-V) characteristics, (2) embedded patterned CNTs into polymer using simple silicon-substrate molding process, (3) 3-dimensional distributed CNTs enable the detection of shear and normal forces, and (4) 3-dimensional polymer structure by molding as a tactile-bump. One of anisotropic-type patterned CNT approach behaves good sensing sensitivity of both normal (23%/N) and shear (18%/N) forces loading. With proper CNTs designs, tactile sensor has normal and shear forces sensitivities of up to 23%/N and 95%/N, respectively.

Published in:

Solid-State and Integrated Circuit Technology (ICSICT), 2010 10th IEEE International Conference on

Date of Conference:

1-4 Nov. 2010

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