Application of RFH Industrial Nanosecond Solid State Laser in Material Surface Cleaning

Surface cleaning is an indispensable and important process in industrial production. Many parts need to be cleaned before use or during maintenance. For example, the oxide layer on the surface of the workpiece needs to be removed before welding to increase surface cleanliness and roughness. Facilitates energy absorption in the welding process.

The traditional surface cleaning processes mainly include mechanical scraping, chemical pickling, fluid scouring, ultrasonic cleaning, etc. The operating environment is harsh, polluting the environment, and easily causing damage to the workpiece itself.

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Driven by the concept of green environmental protection, as the current new cleaning technology, laser cleaning technology has gradually replaced traditional cleaning processes in many fields with many advantages.

The mechanism of laser surface cleaning is to use the vibration of the laser pulse, the thermal expansion of the particles and the photolysis or phase change of the molecules or the combination of three effects to achieve the purpose of removing oxides, oil stains and other attachments on the surface of the material. When the high-energy-density beam acts on the surface of the object, the material attached to the surface of the object is rapidly heated and expanded under the action of the short-pulse laser, reducing or overcoming the resultant force between the surface material and the surface of the matrix material, making it detached, or in Under the high-energy beam, the surface material is instantly evaporated, vaporized or decomposed, so as to achieve the purpose of cleaning and removal. Since the peeling threshold of the surface material from the substrate surface is much smaller than the peeling threshold of the surface material of the substrate, the substrate itself will not be damaged after the surface material is cleaned by the nanosecond pulsed laser irradiation.

With its excellent performance, RFH industrial grade nanosecond solid-state lasers can be used for laser cleaning in addition to cutting, sub-paneling and drilling of PCB boards, ceramics, silicon wafers, glass and other materials.

It adopts a unique resonant cavity design, and the repetition frequency covers a wide range, from single pulse to 500kHz. The high repetition frequency can improve the efficiency of cleaning and increase the benefits for customers. The pulse width is small (<20ns@50kHz, 355nm), and the heat affected area is small during processing, which minimizes the impact on the substrate material. Taking semiconductor processing as an example, the surface of the base material is not clean enough to easily lead to chip failure. Efficient cleaning by nanosecond solid-state laser without damaging the material itself can effectively improve the yield of the product.

Compared with the traditional cleaning process, the use of industrial-grade solid-state lasers for surface efficiency is higher, the entire cleaning process does not require chemicals, and does not need to consume a lot of water, which is more in line with the current mainstream trends of energy saving and environmental protection, and laser cleaning has a wide range. Easy to control, metal, non-metal and other workpieces can be used, and can be widely used in high-end equipment manufacturing fields such as semiconductor industry, 3C electronics, automobile manufacturing, etc. .

In order to achieve a better cleaning effect, inert gas can be used to blow the cleaning area, which can speed up the cleaning progress, reduce the risk of the cleaned waste sticking to the surface of the material again, effectively improve the cleanliness, and make the application of laser surface cleaning more calm and efficient.

Using laser technology and cutting-edge technology to develop laser equipment and solutions that meet the needs of customer groups is the tireless pursuit of Nafei Optoelectronics. The market demand is constantly changing. RFH will continue to strengthen continuous innovation, promote the double improvement of the quality and processing efficiency of the researched and developed laser products, and bring more advantageous applications to the fields of laser surface cleaning and laser micromachining.