LED coating keeps surfaces shiny after multiple soldering
The new material, StabiLUX, is a high-reflectance white coating that maximizes the usable light from surface-mounted or Chip-On-Board (COB) LED emitters. The silicone-free formula is designed to maintain high reflectance even after moving through harsh die attach and printed circuit board (PCB) assembly processes. In testing and in the field, StabiLUX has been proven to retain up to 95% reflectance after undergoing three solder reflow cycles and after 2,000 hours of operation at 150°C. The material is also UV- stable, displaying only very little performance degradation after prolonged exposure to LED light or sunlight.
As compared to liquid photoimageable (LPI) solder mask alone, the new material maintains its reflectance for a longer period of time. After solder reflow, solder mask reflectance often reduces to 80% or less, while StabiLUX maintains nearly all of its initial reflectance following thermal processing. In addition, the Henkel development is the only one-part, silicone-free, re-usable reflective coating on the market, the manufacturer claims. After mixing, most two-part coatings are not re-usable, whereas the unused portion of StabiLUX can be re-frozen for future use.
StabiLUX is applied on top of the solder mask and is designed for use with FR4 PCBs and thermal clad insulated metal substrates, which are high-performing, thermally-enhanced substrates that help maximize system power density and reliability. Thermal clad is available in a variety of constructions, including versions for high-power lighting applications and used by many of the world’s top LED manufacturers for Power LEDs.
Additional information: www.bergquistcompany.com.
If you enjoyed this article, you will like the following ones: don't miss them by subscribing to :