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Difference Between PCB and PCBA

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A. What is PCB?

PCB (Printed Circuit Board), the Chinese name for the printed circuit board, also known as printed circuit boards, is an important electronic component, is the support body of electronic components, is the carrier of the electrical connection of electronic components, PCB is known as the "mother of all electronic products". Because it is the use of electronic printing technology, it is called "printed" circuit board.

Before the emergence of PCB, the interconnection of electronic components are relying on wires directly connected to complete. Today, wires are only used in the laboratory for experimental applications and the existence of printed circuit boards in the electronics industry has certainly taken over the dominant position.

PCB production process:

Contact the manufacturer → open material → drilling → copper sinking → graphic transfer → graphic plating → desmear → etching → green oil → characters → gold finger plating → molding → test → final inspection.

PCB unique advantages: can be densified, high reliability, can be designed, can be produced, can be tested, can be assembled, can be maintained.

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B. PCBA is How to Evolve?

PCBA is the English Printed Circuit Board +Assembly abbreviation, that is to say, the PCB empty board through the SMT on the pieces, or through the DIP plug-in the entire process, referred to as PCBA. SMT and DIP are integrated in the PCB board parts of the way, the main difference is that SMT does not need to drill holes in the PCB, in the DIP need to insert the parts of the PIN foot has been drilled in the hole.

SMT (Surface Mounted Technology) surface mount technology, the main use of the mounting machine is a number of micro-small electronic parts mounted on the PCB board, the production process for: PCB board positioning, printing paste, mounting machine mounting, over the soldering furnace and made of the test. SMT integration of the positioning and the size of the parts is very sensitive, in addition to the quality of the solder paste and the quality of the print In addition, the quality of solder paste and printing quality also play a key role.

DIP that is, "plug-in", that is, in the PCB version of the inserted parts, due to the electronic parts of large size and is not suitable for mounting or manufacturers of production processes can not use SMT technology in the form of plug-in integrated parts. At present, the industry has artificial plug-in and robotic plug-in two ways to realize its main production process: paste the backing (to prevent tin plating to the undeserved place), plug-in, inspection, over the wave soldering, brush plate (to remove the stains left in the process of over the furnace) and made of inspection.


C. The Difference Between PCB and PCBA

Simply put, PCBA refers to a general process, can also be understood as a finished circuit board, that is, PCB board processes are completed before counting the PCBA, while the PCB refers to an empty rinted circuit board, there are no parts on it.


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