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http://dx.doi.org/10.7840/kics.2015.40.5.799

Inkjet-Printed Capacitive Touch Paper  

Yun, Taehwa (School of Electrical and Electronics Engineering, College of Engineering, Chung-Ang University)
Lee, Sak (School of Electrical and Electronics Engineering, College of Engineering, Chung-Ang University)
Lim, Sungjoon (School of Electrical and Electronics Engineering, College of Engineering, Chung-Ang University)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.40, no.5, 2015 , pp. 799-805 More about this Journal
Abstract
In this paper, an inkjet-printed capacitive touch pad is proposed. This touch pad detects contacts of human finger by detecting changes in effective capacitance due to electrical impedance of human finger. A flexible, low-cost and disposable paper is used as a substrate. Inkjet printing technology makes the fabrication fast, simple and environmentally friendly. Measured capacitances of the touched and untouched states are in the range of 163 to 182pF and 218 to 272pF, respectively. The differences in the measured capacitance of each state are sufficiently large to recognize that a finger has made contact with touch pad.
Keywords
Touch pad; capacitive touch; inkjet printing technology; paper-electronics; touch paper;
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