Protótipo de impressão de PCI usando laser, para prototipagem em laboratório

Abstract

In the last two decades the Laser Direct Imaging (LDI) has been extensively studied only with the galvanometric movement system, with focus for the industry. Which faces increasingly complex challenges such as the miniaturization of components and the high density of circuit interconnections. However, in electronics labs, the challenges come down to prototyping a quality printed circuit board (PCB). For this reason, this paper aims to present an alternative to facilitate the transfer of circuit design to PCB. Aiming to assist the prototyping of PCBs in electronics laboratories. For this purpose, an alternative was studied using the LDI with the Cartesian CNC (Computed Numerical Control) system of two axes. To test this alternative, a prototype was built for an exploratory case study, where tests were carried out to test capacities and performance levels. The tests were based on the ABNT NBR IEC 62326-4-1 standard, which is responsible for the detailed PCBs capability specification. The results were able to achieve under optimum conditions the minimum width of 0.082 mm for the track and 0.120 mm for the separation between the tracks. A good result compared to the average minimum width of the tracks manufactured by the national PCBs industries, which is 0.125 mm. With the results obtained with the prototype, it was clear that the use of the LDI with a two-axis Cartesian CNC drive system is effective for the transfer of images. It can support the prototyping and production of PCBs in electronics laboratories.