Gorgeous effect! Application of nanosecond solid-state laser in cutting tempered film

Driven by 5G devices, global smartphone shipments in 2021 are expected to reach nearly 1.4 billion units, a year-on-year increase of 6.5%. The huge number of mobile phones has spawned a huge mobile phone peripheral market, and tempered film is one of them. Since the most vulnerable part of a mobile phone is the screen, after a drop, it will be slightly ruptured and leaked, which will affect the appearance and use. layer of tempered film to protect the screen.

According to statistics, a piece of small tempered film can be sold more than 1 billion pieces per year under the huge market base. The entire tempered film market has a scale of 100 billion yuan, and the development prospect is very objective.

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Since the tempered film needs to be very close to the size of the mobile phone screen, especially the many full-screen mobile phones currently on the market, it is also necessary to consider the needs of digging holes in the film, cutting the R angle and the C angle, and the mobile phone models are different. The size of the tempered film is also different.

Diversified cutting requirements have put forward a lot of challenges for tempered film manufacturers. The traditional cutting method is mainly to cut the raw material into a shape suitable for the mobile phone model through a CNC engraving machine, while the receiver, camera and other positions need other equipment for reprocessing, the process is cumbersome and the quality is different.

The industrial-grade nanosecond solid-state laser developed and designed by RFH can cut the tempered film at one time. As we all know, laser processing has the characteristics of high efficiency, less consumables, low cost, and strong adaptability to processing materials, and the cost effect is very obvious in large-scale production. The parameters of this laser are very matched to the cutting needs of tempered film.

One is to output a 355nm ultraviolet laser. The high-energy molecules of ultraviolet photons carried by it can directly make the molecules on the surface of the tempered film material directly detach from the surface of the material. This method has low thermal effect, so ultraviolet laser processing is also called cold processing. Minimize the generation of micro-cracks in the process of cutting tempered film, and most materials have high absorption rate of ultraviolet light, even tempered films made of different raw materials can be easily cut; the second is excellent beam quality (M2 < 1.2) After focusing, the diameter of the spot is small, the cutting effect is finer, the edges are neat and slag-free, and the edge collapse is small. The third is the pulse width (<25ns), such a narrow pulse width has a small heat-affected zone during cutting. Fourth, the high flexibility of laser processing. When cutting the tempered film, you only need to draw a drawing, transmit it to the laser through the program, and complete the process of cutting and digging the tempered film in a very short time, with the repetition of single pulse to 500kHz The frequency makes this industrial-grade nanosecond solid-state laser good and fast in operation, improving the yield rate and helping enterprises reduce costs and increase efficiency.

Nowadays, laser processing has been widely used in the mobile phone industry, such as laser marking and drilling of mobile phone casings, laser cutting of mobile phone screens, metal welding of mobile phone antennas, etc. The refined processing applications provide efficient and fast solutions. When the wave of 5G terminal applications is coming, RFH's industrial-grade nanosecond solid-state lasers will continue to play an important role.