board's PCB are usually printed with a non-conductive permanent epoxy ink. The color is usually white, although other colors are available: yellow, black, blue, red. Screen printing is used to render useful information on the PCB board that can help users during circuite imprimate assembly. It is used to mark component values, part
(with components). Components are generally soldered to the PCB both to connect them electrically and to fix them mechanically. Printed circuit boards are used in almost all electronic products and some electrical products. Currently, the production and assembly of printed circuits are circuite imprimate automated. Electronic computer aided design
coating is called a solder mask. Soldermask is generally green in color but can have different colors: green, red, blue, white, black. Only the outer imprimate circuite layers need to be covered with solder mask, the inner copper layers are protected by the adjacent substrate layers. The soldering mask soldermask