Printed circuit board production refers to the production of printed circuits, printed components, or conductive patterns formed by combining the two on an insulating substrate according to a predetermined design. The conductive patterns that provide electrical connections between components on the insulating substrate are called printed circuits, excluding printed components. Printed circuit boards or finished printed circuit boards are called printed circuit boards or printed circuit boards, also known as printed circuit boards. What are the basic functions of printed circuit board production? Let's take a look together below.
The substrate made of printed circuit boards is generally made of materials that are insulated, heat-insulating, and not easily bent. The small circuit material visible on the surface is copper foil. Originally, copper foil covered the entire board, but during the manufacturing process, some of the copper foil was etched away, leaving behind a grid like pattern of small circuits. These circuits are called wires and are used to provide circuit connections for components on printed circuit boards.
To fix the components on the printed circuit board, the pins can be directly soldered onto the solder pads. Solder pads are used to fix component pins or lead out wires, test lines, etc. They come in various shapes such as circular and rectangular. On the most basic printed circuit board (single panel), components are concentrated on one side, while wires are concentrated on the other side. In this way, holes need to be drilled on the board so that the pins can pass through the board to the other side, so the pins of the components are soldered on the other side. Therefore, the front and back surfaces of printed circuit board production are respectively referred to as the component surface and the soldering surface.
If two printed circuit boards are to be connected to each other, gold finger edge connectors are usually used. Connect the connector spring pieces together for compression contact and conductive interconnection. Usually, when connecting, insert the gold finger on one printed circuit into a suitable slot on the other printed circuit (usually called an expansion slot). Due to its good conductivity, gold will not be directly oxidized or rust at low and high temperatures, and it is also very easy to electroplate and has a beautiful appearance. Therefore, electroplated gold is almost always chosen for the contact surface in the electronics industry. In computers, graphics display cards, sound cards, network cards, or other similar interface cards are all connected to the motherboard using gold fingers.
The role of printed circuit boards in electronic equipment includes providing mechanical support for the fixation and assembly of components such as transistors, integrated circuits, resistors, capacitors, inductors, etc; Implement wiring and electrical connections, as well as electrical insulation, between components such as transistors, integrated circuits, resistors, capacitors, inductors, etc. to meet their electrical characteristics; Provided recognition characters and graphics for component inspection and maintenance in electronic assembly processes, and provided solder mask graphics for wave soldering.