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What is the difference between bare PCB and PCBA?

What is the difference between bare PCB and PCBA?

For many friends who don’t know much about the circuit board industry, they always think that PCB is PCBA in their minds. There is no difference between them. Actually, there is a big difference between PCB bare board and PCBA. This chapter is mainly based on this topic. Make a detailed text answer!
  The difference between PCB bare board and PCBA:

   1. PCB without any components

2. PCBA is the electronic components required by the manufacturer to solder and assemble on the PCB board through SMT or plug-in processing after obtaining the PCB as the raw material, such as IC, resistor, capacitor, crystal oscillator, transformer and other electronic components. The high temperature heating of the reflow oven will form a mechanical connection between the components and the PCB board, thereby forming a PCBA.


   1, PCB characteristics:
  1. High wiring density, small size and light weight, which is conducive to the miniaturization of electronic equipment.
  2. Because the graphics are repeatable and consistent, errors in wiring and assembly are reduced, and equipment maintenance, debugging and inspection time are saved.
  3. It is conducive to mechanization and automated production, which improves labor productivity and reduces the cost of electronic equipment.
   4. The design can be standardized, which facilitates interchangeability.

  PCB is the abbreviation of Printed Circuit Board, translated into Chinese is called printed circuit board, because it is made by electronic printing, it is called "printed" circuit board. PCB is an important electronic component in the electronics industry, a support for electronic components, and a carrier for electrical connection of electronic components. PCB has been extremely widely used in the manufacturing of electronic products, the reason why it can be widely used

   2. PCBA features:

  PCBA is the abbreviation of Printed Circuit Board +Assembly, which means that PCBA passes through the entire process of PCB blank board SMT and then DIP plug-in.
   Note: SMT and DIP are both ways to integrate parts on the PCB. The main difference is that SMT does not need to drill holes on the PCB. In DIP, the PIN pins of the parts need to be inserted into the holes that have been drilled.

SMT (Surface Mounted Technology) surface mount technology mainly uses mounters to mount some tiny parts on the PCB. The production process is: PCB board positioning, solder paste printing, mounter mounting, and reflow Furnace and finished inspection.

   DIP means "plug-in", that is, inserting parts on the PCB board. This is the integration of parts in the form of plug-ins when some parts are larger in size and are not suitable for placement technology. The main production process is: sticking adhesive, plug-in, inspection, wave soldering, printing and finished inspection.