Saturn Electronics Logo
   
Metal Core Resource Center
Metal Core PCB Webinars
LED PCB Fab Notes
Researched Information
SuperWhite LED Soldermask
Materials Comparison Chart
LED Product Calculators
SuperWhite LED Soldermask


Current Resin Systems
  • Focus: initial thermal shock, not constant heat
  • Tend to brown over time
  • Not developed as Reflecting Surface for LEDs
Desired Resin Systems
  • Remain white through Assembly and Lifespan of LED final product
  • Have high reflectivity to enhance LED performance resulting in lower power consumption


Internal Soldermask Research

White High Temperature LPI Soldermask is the Solution

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.

Identified 2 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.





 

Sign Up Today for our FREE thermal management LED PCB webinar

ul logo
View our UL Certification