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What Is a Printed Circuit Board? What Is It Used For?

Printed Circuit Board

Printed Circuit Boards (PCBs) are the backbone of any electronic product. They contain the necessary components for the functioning of a device and act as a bridge between them. So, what exactly is a PCB?

Printed Circuit board

A printed circuit board is a flat board with copper tracks on it. The tracks are connected to components, such as transistors and resistors, which are also mounted on the board. Printed circuit boards are used in electronics and electrical engineering. They can be made of FR4 (formaldehyde laminated fiberglass), glass epoxy laminate or other materials such as non-conductive polymer sheets; these may be flexible or rigid circuits depending on their circuitry requirements.

What components are part of the PCB?

A PCB has some basic components such as resistors, capacitors, transistors and diodes.

The resistors are used to control the flow of electricity in a circuit by regulating the amount of current that can pass through them. They have two terminals: anode (+) and cathode (-). These components determine how complex your PCB will be; the more layers you have and tracks you require (interconnections between parts), the more difficult it will be to create your PCB design.

How does it work?

A printed circuit board is a system of conducting pathways on a special substrate material. The most common substrate materials are fiberglass or epoxy resin, but other materials such as paper and glass can be used. The circuits are made by cutting traces into the surface of the board and applying copper foil to those traces. Connections between components are made by cutting holes in the board that allow wires to pass through; these holes are called vias.

A PCB may consist of many layers, each having a specific function in the overall design. For example, some layers may carry signals from one part of an assembly to another; other layers may provide ground connections or power distribution paths; while still others might provide protection against electrical interference or damage due to physical stress (such as heat).

PCB manufacturing involves taking hundreds or thousands of small pieces (components) and assembling them into one complex device (circuit). In order for this process to succeed, everything has been designed so that it fits together correctly in accordance with industry standards set forth by The International Electrotechnical Commission (IEC).

How is a PCB assembled?

PCB assembly is a magician’s trick to do as it involves a bit of precision and accuracy.A PCB is assembled by the following steps:

  • Choosing the appropriate materials for the substrate (also called a base material or laminate), which determines how durable and reliable it will be.
  • Making sure that all of the components are placed on a layout before any soldering takes place. This allows you to see if there are any mistakes or issues before you start working with hot glue guns and soldering irons.

Making sure that the components are placed on a layout before any soldering takes place. This allows you to see if there are any mistakes or issues before you start working with hot glue guns and soldering irons.


So, now you know all about PCB working, what they are and how they work. You also now have a better understanding of the process by which PCBs are made. As you can see, it is not an easy task to produce a high-quality PCB that will stand up to all kinds of environments outside of your home or office; it can be done however, if you take the time to make sure that every step has been done correctly from start to finish.

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