Debris-free laser ablation processing assisted by condensed frost layer

A laser processing method, comprising:

• forming a frost layer by condensation of gaseous substances on a surface of a processing sample at a temperature below a freezing point of the gaseous substances with a refrigeration device, wherein the surface of the processing sample is a curved surface, and thickness of the frost layer is 0.5 μm on the curved surface of the processing sample,
• irradiating a laser beam on the processing sample through the frost layer to conduct ablation processing,
• melting the frost layer by heating the surface of the processing sample by the laser irradiation to form a liquid,
• generating microbubbles in the liquid by the laser irradiation,
• washing off the liquid containing debris, wherein the microbubbles are ruptured and bursted to facilitate removal of debris, and
• obtaining a laser ablation groove or through hole.