Paul W. Leu

Sacrificial‐Layer‐Assisted Heat‐Affected‐Zone Suppression in Laser Patterning of PET for High‐Performance Flexible Devices

Laser ablation of polymers produces a heat‐affected zone (HAZ) and material redeposition, even when using ultrashort‐pulse lasers. Here, we demonstrate a sacrificial‐layer strategy for nanosecond laser cutting of PET that suppresses the HAZ, with no HAZ detected by SEM, AFM, Raman spectroscopy, or XPS, through therma...