Printed Circuit Board manufactured by HYY Company has good abrasion resistance, in circuit board project, it refers to wear resistance of green paint. Its accuracy refers to the difference between the performance and the established goals, such as the number of holes drilled, is it able to achieve true position. The adhesion is the surface of the main body of the adhesion strength, like green paint in the cooper surface, or between the coating and the adhesion of the substrate, or copper on the surface of the plate. Aging of Communication PCB refers to the product through the physical or chemical process, will be lose the original quality with the time experience gradually. Bond strength refers to the strength of the applied force when the layers are forced to separate adjacent. Its chemical resistance is resistance of various substances to chemicals.