XeCl Laser Ablation Of Organic Polymers: Characterization Of Debris And Its Effect On Surface Morphology

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Abstract
Evidence is presented, that the formation of conical structures on the surface of polyi-mide etched at low laser fluences is caused by shielding of the underlying polymer by particulate debris. The results show that with increasing diameter of the etched zone, higher laser fluences are required to achieve a smooth surface. XeCl ablation of polyimide in an atmosphere of oxygen at 0.2 J/cm2 results in oxidation of nearly 90% of ablated carbon to CO2 and CO, but does not eliminate the deposition of debris on the perimeter of the etched zone.

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