s1     s2     s3
These types of boards are mostly used in case of simple circuitry and where the manufacturing costs are to be kept at a minimum. Nevertheless, they represent a large volume of printed boards currently produced for professional and non-professional grades.
 
Single-sided PCB means that wiring is available only on one side of the insulating substrate. The side which contains the circuit pattern is called the solder side whereas the other side is called the component side.

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