The traditional glass cutting process can no longer meet the current requirements for the subsequent processing of glass and the safety of the finished product. For example, micro-cracks left at the cutting edge make the glass easily break. At the same time, the subsequent coating process and the vibration and deformation caused during transportation are unavoidable. . In recent years, the continuous popularization of ultra-short pulse laser pointer has effectively reduced the risk of processing glass covers for smart terminals such as mobile phones.
Not only do additional adhesives need to be used with traditional adhesive processes, but such adhesives will inevitably face the risk of aging failure after long-term use. The unique physical properties of glass make the related welding technology extremely difficult: glass is a brittle material and has a lower thermal conductivity than metal. It is easily broken due to changes in internal stress after heating, and femtosecond laser beam welding can effectively avoid breaking Crack risk. "Using ultrafast lasers with flexible pulse modulation is necessary.
The glass is transparent to the light beam from the ultraviolet to the near-infrared, and the absorption of the energy of the light beam occurs only in the state of extremely high energy density, and the high energy density point is located near the laser focus of the lower glass. The molten pool is created from thousands of ultra-short laser pulses from bottom to top in milliseconds. Welding head based on special beam shaping, accurate grasp of heat input, optimal pulse input frequency and energy control can ensure good welding of glass. TRUMPF has introduced this technology into the mass production of fiber optic protective caps. The femtosecond green laser pointer welding process can achieve a drawing force more than twice that of traditional processes.
As more flexible electronic product design elements continue to emerge, more applications will occur in the glass welding and cutting process. Considering customers' requirements for cutting and welding optical path compatibility and lens replacement, the company ’s new use of the same Appearance design. with the newly launched ultra-short pulse Laser Engraver with adjustable pulse width 350fs ～ 20ps and highest frequency up to 2MHz. bringing customers a better processing experience.