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Essential Parts of a Printed Circuit Board

  • Author:o-leading.com
  • Source:o-leading.com
  • Release on :2017-06-23
If you want to understand the printed circuit board, it is important to understand the various components used to make Custom Circuit Boards china.

The most obvious part is the circuit board itself. It is plastic, reinforced with glass. The next most obvious part is the lines and pads that are connected together. They are made of copper and are called "traces". They carry on electricity, allowing electricity to pass through the board. They are similar to wires, but are finer and used to deliver electricity to terminals.


Simple PCB is single sided and has a copper layer. These structures have one side having all the components and the other side having traces. The holes are placed through the circuit board to transfer the circuit from the track to the assembly. While the double-sided PCB is on both sides of the circuit board have traces. Multilayer boards are now more widely used because of the need for more complex and controlled additional functionality.

A series of components can be incorporated into the PCB. No components, PCB is just an electrical conductor, no function. Common components include:

Capacitators: The store electricity for later use. They are available as polarized or non-polarized.
Diodes: allows current to pass in one direction only, blocking the other.
Inductor: These coils store charge in a magnetic field.
Light emitting diodes (LEDs). These light up when current flows is applied. They only allow current to flow in one direction.
Resistors: These control the electric current as it passes through. The level of resistance provided varies based on the needs of the engineer. They are made in different color codes to show the level of resistance.
Transistors: These are a form of switch that performs changes function based on the voltage passing through.
Vias: small holes in the board that allow a signal to be passed from one side to the other.
Batteries: these provide the circuit with voltage.
Switches: These can be open or closed, allowingor blocking current.