The relationship between PCB and PCBA

About PCB

PCB is the abbreviation of Printed Circuit Board, so named because it is made using electronic printing technology. PCB is a crucial electronic component in the electronics industry, serving as a support for electronic components and a carrier for their electrical connections. PCB has been widely used in the manufacturing of electronic products. Its unique characteristics include:

  1. High wiring density, small size, and light weight, facilitating the miniaturization of electronic devices.
  2. The repetitive and consistent nature of its graphics reduces errors in wiring and assembly, saving time spent on equipment maintenance, debugging, and inspection.
  3. Facilitates mechanization and automation in production, improving labor productivity and reducing the cost of electronic equipment.
  4. Design standardization promotes interchangeability.

About PCBA

PCBA stands for Printed Circuit Board Assembly, which means that PCBA undergoes the entire process of SMT mounting on the bare PCB and subsequent DIP insertion.

Note: SMT and DIP are methods of integrating components onto PCBs. The main difference is that SMT does not require drilling holes in the PCB, whereas DIP involves inserting component pins into pre-drilled holes.

SMT (Surface Mounted Technology) primarily uses placement machines to mount small components onto PCBs. The production process includes: PCB board positioning, solder paste printing, component placement by placement machine, reflow soldering, and final inspection.

DIP (Dual In-line Package) involves inserting components into PCBs. This method is used for larger components that are not suitable for surface mounting technology. The main production process includes: adhesive application, component insertion, inspection, wave soldering, PCB cleaning, and final inspection.


PCBA refers to a processing process or finished circuit board, which is considered PCBA only after all processes on the PCB are completed. PCB, on the other hand, refers to a blank printed circuit board without components.

In conclusion: PCBA is a finished board; PCB is a bare board.

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