PCB solder pad inspection mechanism using gerber file
With the explosion in the electronics market, PCB manufacturing has taken a very important place. The manufacturers use Gerber file as the only reference for PCB drawing since it gives the most accurate details of the solder pads to be etched on the PCB. Due to this feature of the Gerber file, we are using it in our proposal of PCB inspection mechanism. Gerber is a text file specifying the shape, dimensions and coordinates of the solder pads. Firstly, it is parsed so that these details could be extracted. From this information, the locations are tracked on the PCB image captured and the corresponding solder pad is cropped. The amount of solder paste applied is calculated by computing the area covered by the solder pad. Correspondingly, the ideal area, as given by the Gerber file is found out. Upon comparison of these two areas, the various PCB defects like deficient, excessive can be found out. Displacement faults are found out by calculating the centroid of the different solder pads on the PCB and comparing with the locations given by Gerber.
2016 International Conference on Communication and Signal Processing (ICCSP)