The PCB stands for Printed Circuit Board Printed Circuit Board is also called.
Currently we are using electronics or electronic components in most of the printed circuit board is used.
PCB-mount electronic components and functions of the signal and the electrical characteristics of the wiring for the electrical connection are responsible for the human body when compared to the importance of the skeletal and nervous system have a corresponding. 

SINGLE SIDE PCB

The materials of the insulating layer FR-4 (GLASS EPOXY LAMINATE) or CEM3 (GLASS CLOTH + GLATH EPOXY) on only one side to the conductor pattern and the PCB, TV, mobile phones, LED lighting is the most commonly used products.   

QUALITY CEM-3, FR-4    
PURPOSE LED LIGHTING, BACKLIGHT UNIY(BLU), POWER BOARD, CONNECTION BOARD etc