SuperWhite LED Soldermask
| Current Resin System
|| Desired Resin System
| Focus: initial thermal shock, not constant heat
|| Remains white through Assembly & Lifespan
| Tend to brown over time
|| High reflectivity to enhance performance
| Not developed as Reflecting Surface for LEDs
|| Result: Lower power consumption
Solution: White Hot Temperature LED Soldermask
During the past two years a number of LED white soldermasks have been introduced. Unfortunately, we didn't see much of an improvement.
As a result, we innovated our own solutions and identified two offerings demonstrating significant improvements.
Achieving SuperWhite Soldermask While Resisting Browning
One way to achieve a "SuperWhite" soldermask that resists browning is to apply a second coat of thermal cured white soldermask over the LPI.
However, this can cause a concern that the second coat may impede the thermal dynamics of the PCB surface.
Based on the thermal images below comparing a single coat of LPI to a board with a secondary coat, we can see that this is a non-issue.