A printed circuit board, or PCB, is used to mechanically support and electrically connect electronic components using conductive pathways, tracks or signal traces etched from copper sheets laminated onto a non-conductive substrate. It is also referred to as printed wiring board (PWB) or etched wiring board. Printed circuit boards are used in virtually all but the simplest commercially produced electronic devices.


A PCB populated with electronic components is called a printed circuit assembly (PCA), printed circuit board assembly or PCB Assembly (PCBA). In informal use the term "PCB" is used both for bare and assembled boards, the context clarifying the meaning.




Advantage of Designing PCB and Circuit Diagram 


The circuit board fabrication cost (pcb cost) is lower with mass quantity production


Electronic circuit characteristics will be maintained without introducing parasite capacitance with a proper circuit board design.


Component wiring and assembly can be mechanized in a circuit board manufacturing facility.


PCB’s offer uniformity of electrical characteristics from assembly to assembly.


The location of electronic parts is fixed and so it simplifies components identification and maintenance of equipment.


Inspection time is reduced because printed circuitry eliminates the probability of error.


Chances of miswiring or short-circuited wiring are minimized.