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Paper-Based, Capacitive Touch Pads

Authors

  • Aaron D. Mazzeo,

    1. Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford St., Cambridge, MA 02138, USA
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  • William B. Kalb,

    1. Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford St., Cambridge, MA 02138, USA
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  • Lawrence Chan,

    1. Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford St., Cambridge, MA 02138, USA
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  • Matthew G. Killian,

    1. Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford St., Cambridge, MA 02138, USA
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  • Jean-Francis Bloch,

    1. Department of Papermaking Engineering - LGP2, Grenoble Institute of Technology, 461 rue de la Papeterie, BP65 - 38402 Saint Martin d'Hères, Cedex, France
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  • Brian A. Mazzeo,

    1. Department of Electrical and Computer Engineering, Brigham Young University, 459 Clyde Building, Provo, UT 84602, USA
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  • George M. Whitesides

    Corresponding author
    1. Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford St., Cambridge, MA 02138, USA
    2. Wyss Institute for Biologically Inspired Engineering at Harvard University, 3 Blackfan Circle, Boston, MA 02115, USA
    • Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford St., Cambridge, MA 02138, USA.
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Abstract

original image

Metallized paper is patterned to create touch pads of arrayed buttons that are sensitive to contact with both bare and gloved fingers. The paper-based keypad detects the change in capacitance associated with the touch of a finger to one of its buttons. Mounted on an alarmed cardboard box, the keypad requires the appropriate sequence of touches to disarm the system.

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