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Electrode Patterns

  • Tony Gray
Chapter

Abstract

Determining the best electrode pattern for a touch sensor requires an understanding of the electric field and its effect on changes in capacitance as a finger moves around the surface of the sensor. Several electrode shapes are considered and analyzed. A diamond-shaped pattern provides the best electric field distribution. Even though the pattern is called diamond, each capacitor cell actually consists of two half triangles connected by a skinny neck. With this pattern the capacitance of a cell depends much more on the fringe field than the plate capacitance. Another common electrode pattern is Manhattan also known as Flooded X. This pattern has excellent noise immunity but also has issues with linearity and electrode pitch. Some touch sensors are constructed on separate layers. Others are built on one layer with micro-crossovers. There are several methods for patterning the electrodes.

Copyright information

© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  • Tony Gray
    • 1
  1. 1.PlanoUSA

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