CircuitWorks for SolidWorks is a bi-directional IDF and PADS file interface for the SolidWorks 3D CAD system. CircuitWorks adds in to SolidWorks and allows it to read and write the industry standard IDF 2.0, 3.0 or 4.0 format files produced by Electrical CAD (ECAD) systems used for Printed Circuit Board (PCB) design. It can also read *.asc files from the Mentor PADS ECAD system