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Applications of Laser Cleaning

Microelectronics:Semiconductor components, microelectronic devices, memory templates, etc.; cultural relics protection: stone carvings, bronzes, glass, oil paintings and murals, etc.
Abrasive Cleaning:Rubber molds, composite molds, metal molds, etc.
Surface Treatment: Hydrophilic treatment, treatment of welds before and after welding, etc.
Paint And Rust Removal:Aircraft, ships, weaponry, bridges, metal pressure vessels, metal pipes, etc.; aircraft parts, electrical product parts, etc.
Other:Urban graffiti, printing rollers, building exterior walls, nuclear industry, etc.


Laser Cleaning Process


Absorption of large energy forms a rapidly expanding plasma (a highly ionized unstable gas), which produces shock waves;
The shock wave turns the pollutants into fragments and is removed;
The light pulse width must be short enough to avoid heat accumulation that damages the processed surface;
Experiments show that when there is oxide on the metal surface, plasma is generated on the metal surface;


The beam emitted by the laser is absorbed by the contamination layer on the surface to be treated;

Laser Cleaning Principle

Plasma is only generated when the energy density is higher than the threshold, which depends on the contamination layer or oxide layer being removed. This threshold effect is very important for effective cleaning while ensuring the safety of the base material. There is a second threshold for the appearance of plasma. If the energy density exceeds this threshold, the base material will be destroyed. In order to perform effective cleaning under the premise of ensuring the safety of the base material, the laser parameters must be adjusted according to the situation so that the energy density of the light pulse is strictly between the two thresholds.






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