Online proceedings - EDA Publishing Association

Figure 15. Key board input system. The System consists of 3 x 9 touch sensor
array, MCU and PC.
11-13 May 2011, Aix-en-Provence, France
[5] Abouraddy, A. F.; Shapira, O.; Bayindir, M.; Arnold, J.; Sorin, F.;
Hinchzewski, D. S.; Hoannopoulos, J.; Fink, Y. Large-scale optical-field
measurements with geometric fibre constructs. Nature materials 2006, 5,
532-536.
Figure 16. Demonstration of key board input. The typed alphabet was displayed
on the PC.
Ⅵ. CONCLUSIONS
In summary, we proposed surface capacitive type of fabric
touch sensor for large-area electronic devices. In the sensor
structure, PEDOT:PSS and UV-curable adhesive-coated
fibers were woven as wefts and warps. The die-coating of
PEDOT:PSS and UV-curable adhesive was developed to
continuously form functional material on fibers. The
weaving with automatic looming machine was employed for
constructing meter-scale sensor fabric in continuous manner.
Then, the 1.2 m × 3 m sensor fabric was woven. The sensors
could detect human touch by measuring surface capacitance
between human fingers and fibers. The values of capacitance
change under touch input was 1-2.0 pF which is easy to
detect by conventional capacitance meters that were
integrated in MPUs. The developed sensor structure and
fabrication process will lead to large area touch sensors in
various electronic devices.
ACKNOWLEDGMENT
The research “Development of Continuous
Nano/Micromachning and Integration Process for Fiber
Substrates” has been being conducted as one of the research
items of New Energy and Industrial Technology
Development Organization (NEDO) project “Development
of Manufacturing Technologies for Hetero Functional
Integrated Devices “(BEANS project).
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