Touch panel and method of forming the same
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United States of America Patent
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Oct 11, 2016
Grant Date -
Sep 4, 2014
app pub date -
Feb 7, 2014
filing date -
Mar 1, 2013
priority date (Note) -
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Abstract
A touch panel comprises a plurality of basic sensing-units arranged in a matrix. The basic sensing-unit comprises a pressure-sensing transistor and a selection transistor. The pressure-sensing transistor comprises a first terminal, a second terminal, a gate electrode, a mask layer, a channel connecting the first and second terminals, a dielectric layer formed on the channel, and a piezoelectric material deposited on the dielectric layer. The piezoelectric material may comprise PVDF, lead zirconate titanate, ZnO, BaTiO3, LiNbO3, or PbTiO3. The selection transistor comprises a first terminal, a second terminal, and a third terminal. The first terminal of the selection transistor connects to a sensing electrode of the touch panel, the second terminal of the selection transistor connects to the first terminal of the pressure sensing transistor, and the third terminal of the selection transistor is a transistor gate and connects to a drive electrode of the touch panel.
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