Micro LED lamp bead gap epoxy resin filling process features similar to underfill, filling each adjacent LED foot, play a fixed LED unit and prevent light leakage. The technical difficulty lies in the fact that each adjacent LED unit is very small, and the gap is only 360um; the weight accuracy of each line is required to be extremely high ± 3%; at the same time, there is no glue on the surface of the lamp bead. This poses a great challenge to the stability and accuracy of dispensing of equipment and valves, and the control of valve scatter points.
Axxon's Apj1000s piezoelectric valve The special impact pin and nozzle are used to realize the line width less than 360um and ensure no scattered points; the program command weight control function of axxon's Au series dispensing software can realize the closed-loop control of dispensing weight for real-time compensation, and ensure the consistency of dispensing weight and effect in the process of batch continuous production; at the same time, advanced equipment calibration compensation technology and visual mark algorithm guarantee In the process of dispensing, the deviation of each line in the same direction is less than 0.1 mm. High precision, high speed and weight closed-loop control greatly improves the yield of products and reduces costs for customers.