PCB refers to the circuit board, and PCBA refers to the circuit board plug-in assembly, SMT Process.
One is a finished plate, one is a bare board. PCB (printed circuit Board) is called "printed Circuit board", made of epoxy glass resin material, According to the difference of its signal layer is divided into 4, 6, 8 layer plate, 4, 6 layers are most common.
Chip and other SMD components are affixed to the PCB.
PCBA may be understood as the finished circuit board, but also on the circuit board on the completion of the process after the PCBA can be Counted.
PCBA= printed cirruit Board + Assembly.
That is, the PCB empty board through the smt, and then through the dip plug the entire process, referred to as PCBA. PCB (printed Circuie Board) printed circuit board abbreviation, usually on the insulating material, according to the predetermined design, made of printed wiring, printed elements or a combination of the two conductive graphics called printed circuit. And on the insulating substrate to provide electrical connection between components of the conductive pattern, known as printed wiring.
In this way, the printed circuit or printed wiring of the finished plate is called a printed circuit board, also known as printed circuit boards or printed Circuits. The standard PCB has no parts and is often referred to as "printed circuit board printed Wiring Board (PWB)".
