Types of printed circuit board
of copper is etched and any internal sleepers (which will not extend to both outer surfaces of the finished multilayer board) are plated before the layers are laminated together. FR-4 epoxy placat imprimat circuit dublu glass is the most common insulating substrate. Flexible-Rigid printed circuits are boards that bring in a unique combination
Printed circuit board silkscreen
or silkscreen for short, is done on the top layer imprimat placat dublu circuit of the PCB and has the role of a reference indicator for the components on the PCB. Graphics and text on a circuit board's PCB are usually printed with a non-conductive permanent epoxy ink. The color is usually white,
Printed circuit board assembly
the pads on the other side. circuit imprimat dublu placat "SMD" components are soldered on the same side of the board. A board can use both methods for soldering components. Today PCBs with components mounted only through holes are now less common. Surface mount is used for components like