Circuit Board Fabrication Process Flow Chart Multilayer PWB Flowhcart. As a fabricator managing the nuances between PWB Prototype and Production, Saturn Electronics Corp., bare circuit board manufacturer, proudly offers this PCB Fabrication Process Flowchart delineating the PWB Production process. In addition to viewing our NEW multilayer PCB flow chart, we are offering a full-size poster, ideal for your office, desk,or cubicle.