Large-format screens comprise many high-powered LEDs. These are potted in a temperature-resistant silicone compound to protect them from environmental factors. When manufacturing displays, the LEDs are mounted on printed circuit boards by the wave-soldering method. The silicone potting compound can pick up residual tin from this bath, which leads to a high reject rate.
Using its Openair® PlasmaPlus® technology, Plasmatreat has succeeded in depositing an anti-stick, ultrathin layer of glass (SiOx) on the silicone. This layer protects the LEDs during the soldering process.