Mat board Made of cardboard covered with paper or decorative fabric, it is available in a wide range of textures and of colors. Choose 8/10ths(0.8 mm) thick for traditional mats. With 15/10thsthick or more, you can create a direct bevel (the mat is cut with a 45° beveled edge)....
High-end consumer and industrial circuit board substrates are typically made of a material designated FR-4. This consists of a woven fiberglass mat impregnated with a flame resistant epoxy resin. It can be drilled, punched and sheared, but due to its abrasive glass content requires tools made ...