loose wires. For its function stencil of helping to prevent solder shorts, the 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 layers need to be covered with solder mask, the inner copper layers are protected by the adjacent
the PCB. Graphics and text on a circuit 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 stencil printing is used to render useful information on the PCB board that can help users during assembly. It
improvement was one of the first aids stencil that allowed this modernization. The smaller and smaller dimensions and the flexibility of the printed circuit board made in recent years have greatly helped fields such as medicine and aeronautics to benefit from smaller and lighter equipment that has allowed them a high