3 Dimensional laser scanner roll patterning

Research for the development of the roll-to-roll printing process in lieu of the existing semiconductor process is actively underway. The roll-to-roll printing system can enable electronic devices to be mass-produced at low cost. This study was conducted to develop the manufacturing technology of the printing roll used in the printing process of electronic devices. The indirect laser engraving technology was used to create printable roll made of chrome-coated roll after coating the surface of the steel roll with copper and polymer, ablating the polymer on the surface of the roll, and etching the roll. The 3-dimensional laser scanner and roll rotating systems were constructed, and the system control program was developed. We used 100W-grade fiber laser, 3-dimensional laser scanner, and 3-axis moving stage system with a rotating axis. We derived the optimal conditions by performing laser patterning experiments, and we were able to secure the minimum line width of 24 μm by using the developed 3-dimensional laser scanner system. Since the degree of integration of printed electronic device has been increasing, the line width and spacing of the printing roll pattern have been decreasing. Therefore, there is growing demand for the printing roll patterning process to produce 20 ~ 30 μm, but there has yet to be a system that can flawlessly yield the micro line width. This study developed the indirect laser patterning technology and laser processing system using a 3D laser scanner.