Delamination

LED Cup De-Bonding

A package-interface separation example showing thermal damage and de-bonding of the lens material at the base of an LED cup.

Scale 100 um scale shown
Observed feature Thermal damage and de-bonding of lens material at the base of the LED cup
Likely mechanism Interface de-bonding associated with thermal overstress during wave solder processing
Thermal damage and de-bonding of lens material at the base of an LED cup

Interpretation

Why this image matters

This image expands the existing delamination examples by showing a different LED package boundary and a different interpretation context than lens-to-die separation.

The report tied the failure to de-bonding of the lens material from the bottom of the cup, most likely due to thermal overstress during the wave-solder process.

That makes it a strong library example for showing that visible package-interface separation can be process-driven and functionally meaningful, not just cosmetic.

delamination de-bonding thermal-overstress led-package
Use this when

Best comparison value

  • Comparing two different delamination boundaries in LED packages
  • Discussing thermally driven package-interface separation
  • Teaching that visible de-bonding can be a meaningful process clue
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