Laser repair platform & technology
■ Micro led repair technology
Micro led display has millions and millions dies to be transferred. Even with the highest yields, the mass transfer process still results in thousands of bad pixels, which need to be repaired. Thousands of die to be repaired is a big job that repair process must be efficient with high quality. MRL repair station is the most advanced solution for efficient and high quality micro led repair. Micro led repair is a very sophisticated process, which requires the technology of being able to control the machine XY repeatability within 0.7um for 1.5 meter moving distance and a special vision algorithm with AI super resolution capabilities to reach transfer gap within 50um and the transfer accuracy within 5um. MRL series, integrating SSI exclusive core technologies in motion control, image processing, algorithms, micro laser machining and sub micron dispensing,is able to meet all critical repair requirements with high quality and efficiency. In addition, MRL series has an exclusive dispensing technology, which is able to dispense silver paste on very small width down to 1um for circuit repair and UV coating on the extremely small dies.
■ 1st step : Remove adhesive , bad die and circuit cleaning with UV laser.
■ 2nd step : Repair circuit with special conductive ink for the circuit width down to 1 um.
■ 3rd step : place and bond new good die with Excimer laser.
■ 4th step UV adhesive coating on the good die.
SSI mass transfer machine specifications：