The acronym of the printed circuit board is PCB, it is a self contained board with interconnected electrical and electronic components found in various devices ranges from beepers to pagers, radios, radar and computer systems. The circuits are produced by a slight layer of conducting material deposited on the outside of an insulating board called as the substrate. Separate components are located on the surface of the substrate & soldered to the connected circuits.

The construction of the PCB can be done in three ways, namely single sided, double sided and multi layered.The components on a PCB are connected electrically to the circuits by two different methods such as hole technology and surface mount. In hole technology, every component consists of thin leads, which are pressed through tiny holes in the substrate & soldered to connection boards in the circuits on the reverse side.In surface mount technology, J-shaped or L-shaped terminals on every component get in touch with the PCB directly. A solder paste includes a glue, solder and flux are applied at the contact point to grip the components in position until the solder is liquefied.

Different Types of Printed Circuit Boards
PCBs have copper tracks to connect the holes where the various components are located They are specially designed for each and every circuit and build construction very easy. Though, making the PCB necessitates special tools. The different types of printed circuit boards mainly include the following

Single Sided PCBs
Double Sided PCBs
Multilayer PCBs
Rigid PCBs
Flex PCBs
Rigid-Flex PCBs
Single Sided PCBs

This single sided printed circuit board includes just one layer of base material or substrate. One end of the substrate is coated with a thin layer of metal, usually copper because it is a good electrical conductor. Generally, a protecting solder mask be seated on the peak of the copper layer, and a last silkscreen coat may be applied to the top to mark elements of the board.

This PCB consists of various circuits and electronic components on the only single side. This kind of module works most excellent for easy electronics, and beginners often design and build this type of board first. These boards tend to cost less to mass-produce than other types of boards. But although this low cost, they’re used rarely because of their intrinsic design limitations.

Double Sided PCBs
This type of PCBs is much more familiar than single-sided boards. Both sides of the board’s substrate include metal conductive layers, and elements attach to both sides as well. Holes in the PCB let circuits on a single side to attach to circuits on the other side.