[Repost] Understand the difference between PCB and PCBA in one article

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[Repost] Understand the difference between PCB and PCBA in one article [Copy link]

I believe that many people are familiar with PCB circuit boards, and may often hear about them in daily life, but they may not know much about PCBA, and may even confuse it with PCB. So what is PCB? How did PCBA evolve? What is the difference between PCB and PCBA? Let's take a closer look.

About PCB

PCB is the abbreviation of Printed Circuit Board, which is translated into Chinese as 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. It is the support of electronic components and the carrier of electrical connection of electronic components. PCB has been widely used in the production and manufacturing of electronic products. The reason why it can be widely used is summarized as follows: 1. High wiring density, small size and light weight are conducive to the miniaturization of electronic equipment. 2. Due to the repetitiveness and consistency of the graphics, wiring and assembly errors are reduced, saving equipment maintenance, debugging and inspection time. 3. It is conducive to mechanized and automated production, improves labor productivity and reduces the cost of electronic equipment. 4. The design can be standardized, which is conducive to interchangeability.

About PCBA

PCBA is the abbreviation of Printed Circuit Board + Assembly, which means that PCBA is the whole process of SMT on PCB blank board and then DIP plug-in.

Note: Both SMT and DIP are ways to integrate parts on PCB board. The main difference is that SMT does not need to drill holes on PCB, while DIP needs to insert the PIN pins of parts into the already drilled holes.

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

DIP means "plug-in", which means inserting parts on the PCB. This is a form of plug-in integration when some parts are large in size and not suitable for mounting technology. Its main production process is: adhesive backing, plug-in, inspection, wave soldering, plate brushing and finished inspection.

*The difference between PCB and PCBA*

From the above introduction, we can know that PCBA generally refers to a processing flow, which can also be understood as a finished circuit board. Only after all the processes on the PCB board are completed can it be considered PCBA. PCB refers to an empty printed circuit board with no parts on it.

In general, PCBA is a finished board; PCB is a bare board.

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