What is the printed circuit board circuit
(Such as element holes, fastening holes, metallized holes, etc.), instead of the chassis of the conventional electronic components, and to realize the interconnection between the electronic components. Because this board is made using electronic printing, it is called "printed" circuit board.
Printed circuit board, also known as printed circuit board, printed circuit board, referred to as printed circuit board, the English referred to as PCB (printed circuit board) or PWB (printed wiring board), the insulating plate as the substrate, cut into a certain size,
Printed circuit board it has two functions: 1, fixed components; 2, according to the circuit diagram with the wire to connect the components to form a solid circuit.
With the invention and development of semiconductor devices, only the emergence of printed circuit boards. It is precisely because of the printed circuit board, only miniaturization of electronic products.
In the era of the tube, people want to engage in an electronic product, (such as the radio) are fixed tube tube, with a copper ear insulation bracket fixed resistance, capacitance.
