Do you know what the printed circuit board looks like

Do you know what the printed circuit board looks like

Bare boards (without parts) are also often referred to as "Printed Wiring Board (PWB)". The substrate of the board itself is made of insulated and unbending materials. On the surface can see the fine line material is copper foil, originally copper foil is covered in across the board, and to get rid of the central in the manufacturing process of etching, stay part to turn into a network of fine lines. These lines are called conductor patterns or cabling, and are used to provide circuit connections to the parts on the PCB.

Usually the color of the PCB is green or brown, which is the color of solder mask. It is the protective layer of insulation, which can protect the copper wire, also prevent the short-circuit caused by wave welding, and save the amount of solder. A silk screen is also printed on the welding layer. Usually it will be printed with words and symbols (mostly white) to indicate the position of each part on the board. Screen printing is also known as the icon (legend).

When the final product is made, it will be equipped with integrated circuits, transistors, diodes, passive components (e.g. resistance, capacitors, connectors, etc.) and various other electronic parts. By connecting the wires, electronic signals can form and function.