Surface Capacitive Touch Technology

What is this technology?

The surface capacitive touchscreens provide a solution for customers seeking an alternative to the currently available capacitive options. The transparent protective coating makes the sensor resistant to scratches and abrasions. Touch performance is unaffected by everyday abuse and mishaps such as dirt, dust, condensation, liquid spills, contaminants or cleaning solutions. And the Elo-designed controller responds to quick, light touches, and operates drift-free even in areas of poor grounding.

How does this technology work?

Surface capacitive technology consists of a uniform conductive coating on a glass panel. During operation, electrodes around the panel's edge distribute low voltage uniformly across the conductive layer creating a uniform electric field. A finger touch draws current from each corner of the electric field. The controller calculates touch location coordinates by measuring the current and transmits it to the computer for processing.

Technology / Function Diagrams


  • Elo patented narrow Z-border for greater linearity
  • Fast, sensitive touch response with excellent dragging performance
  • Compatible with industry standard protocols including Elo's


  • Point-of-Sale terminals (POS)
  • Gaming/Amusement
  • Kiosks