Tiny pollutants on the electronic circuit board will reduce electronic efficiency, causing damage to the electronic circuit board. With the development of science and technology, semiconductor, microelectronic equipment is getting smaller and smaller particles need to be cleaned, the cleaning difficulty is huge, the traditional water washing and ultrasonic cleaning have their own shortcomings, laser cleaning brings new hope, become the best cleaning method.
Polyimide film is an important material in electronic components, it is the dielectric material of the link structure inside the multilayer encapsulation film of high speed and high density electronic components, but it is often covered with some particulate pollutants, including titanium particles, chromium particles, tungsten particles, nickel particles, etc. It is necessary to clean these pollutants in order to ensure the normal work of polyimide film. Dunlei laser descaling machine company has done an experiment, cleaning polyimide film, the use of excimer laser, select the wavelength of 235 nm laser, pulse 20ns, laser energy density of 80mj/cm2, using automated robotic mode of operation, the cleaning efficiency is very high, after cleaning found that the cleaning effect is excellent, the use of spectrometer detected pollutant removal ratio of 95% or more, has reached the Requirements standards, cleaning efficiency is high. "Why not 100% decontamination, why there is still 5% left, is not able to remove?" , "It is true that there is still 5% not removed, but this does not mean that it can not be removed, the main reason lies in the time and efficiency, in the complete decontamination of the time, 50% of the time can be removed 95% of the time, and the other 50% of the time to remove the remaining 5% of the time, in the actual operation of the cleaning efficiency and cleaning costs are more important." It shows that there is still a certain gap between theory and practice, and in practical application, it is always a delicate balance among the three: efficiency, effectiveness, and cost. Generally speaking ordinary electronic components can remove 95% of the pollutants has been an excellent cleaning effect.
Laser cleaning in electronic components there are many applications, such as electronic circuit board cleaning, silicon cleaning, integrated circuit cleaning, flexible circuit cleaning, optoelectronic device cleaning, etc., these materials with the development of science and technology, integration, pin more and more pins, holes are getting smaller and smaller, the traditional cleaning methods are difficult to work, laser cleaning because of the high precision, easy to automate the operation, the parameters can be adjusted, Laser cleaning because of high precision, easy to automate operations, adjustable parameters, cleaning efficiency and other advantages, effective removal of dust, grease, oxides and other particles on the surface of electronic components, effectively enhance the durability of electronic components. Laser cleaning for the microelectronics industry in the device size is small, fine particles are not easy to clean the situation provides an effective and reliable technology. At the same time, laser cleaning does not exist on the substrate material wear and corrosion, in line with environmental requirements, can be operated in a narrow space, is any other cleaning process can not compare.
Laser cleaning meets the requirements of environmental protection, in line with the need for sustainable development, with the laser cleaning cost is getting lower and lower, laser cleaning of electronic components is accepted by more enterprises. Before 2016, the cost of laser cleaning of electronic components is 20 times the cost of traditional water washing and chemical cleaning, with the development of laser cleaning technology and laser cleaning equipment in recent years and significant price reductions, the cost of cleaning is now close to the traditional cost.
