I believe that many people are familiar with the design of PCB board and may often hear about it in daily life, but they may not know much about PCBA, or even confuse it with PCB. So what is pcb board design? How did PCBA evolve? What's the difference with PCBA?
*On pcb board design*
Because it is made of electronic printing, it is called "printed" circuit board. Pcb board is an important electronic component in the electronic industry, which is the support of electronic components, and also the carrier of electrical connection of electronic components. Pcb board has been widely used in the production and manufacture of electronic products. Its unique characteristics can be summarized as follows:
1. High wiring density, small size and light weight are conducive to the miniaturization of electronic equipment.
2. Because of the repeatability and consistency of graphics, the error of PCB wiring and assembly is reduced, and the time for equipment maintenance, debugging and inspection is saved.
3. It is conducive to mechanized and automatic production, improving labor productivity and reducing the cost of electronic equipment.
4. The design can be standardized for interchangeability.
PCBA is the abbreviation of printed circuit board+assembly, that is, PCBA is the whole process of bonding the upper half of the blank printed circuit board and dipping.
Note: Surface mounting and chip mounting are both methods of integrating devices on printed circuit boards. The main difference is that the surface mount technology does not need to drill holes on the printed circuit board, and the pin of the part needs to be inserted into the drill hole of the DIP.
Surface mount technology (SMT) Surface mount technology mainly uses a mounting machine to install some small and micro components on the printed circuit board. Its production process includes PCB positioning, solder paste printing, mounting machine installation, reflow soldering furnace and manufacturing inspection.
DIP is "plug-in", that is, insert parts on the printed circuit board. These parts are large in size and not suitable for installation technology. They are integrated in the form of plug-ins. The main production processes are: adhesive backing, plug-in, inspection, wave soldering, brush plating and manufacturing inspection.
*Differences between polychlorinated biphenyls and PCBA*
From the above introduction, we can know that PCBA generally refers to the processing flow, and can also be understood as the finished circuit board. PCBA can only be calculated after all processes on the PCB are completed. A printed circuit board is an empty printed circuit board with no parts on it.