Capacitive Stack-up Guide

In the sophisticated world of HMI design, the dielectric constant (εᵣ) is far more than just a physical property; it is the heartbeat of capacitive touch sensitivity. Understanding how different materials—from standard soda-lime glass to advanced optical adhesives—influence electric field coupling is essential for engineers aiming to balance sleek aesthetics with industrial-grade reliability. As a professional manufacturer, Goodkey Machinery Company provides this technical deep-dive to help you optimize your touch panel stack-up for maximum signal integrity.   The Central Role of Dielectric Constant in Capacitive Touch   In a capacitive touch panel, your finger (a conductive object) changes the local capacitance of a sensor pattern (usually ITO elect...