Heat-seal connectors (also known as Zebra connectors or HSCs) utilize a PET film substrate printed with conductive circuitry-composed of a mixture of conductive carbon and silver pastes-and are coated with a specialized anisotropic conductive adhesive.
The anisotropic conductive adhesive (ACF/ACP) is the core functional component; it consists of an insulating resin matrix and uniformly dispersed conductive particles (such as nickel spheres or gold-plated plastic spheres). Its operating principle relies on a precise heat-sealing process: heat softens and cures the resin, while applied pressure forces the conductive particles to connect the corresponding electrodes of the LCD and PCB along the vertical axis (Z-axis), thereby establishing a conductive path. Conversely, in the horizontal direction (XY-plane), the conductive particles remain separated by the insulating resin, preventing short circuits between adjacent electrodes and achieving the characteristic of "Z-axis conduction with XY-plane insulation."
Typical performance specifications for heat-seal connectors include a conductive resistance of 100 MΩ. Standard heat-sealing process parameters involve temperatures of 130°C–200°C, durations of 3–5 seconds, and pressures of 1.0–2.0 bar. Parameters vary by product model; for instance, the heat-sealing temperature for Shin-Etsu's "DP" series is approximately 130°C, whereas the "KN" series requires approximately 160°C.
