I believe that many people are not unfamiliar with PCB circuit boards, and may be heard often in daily life, but they may not know much about PCBA, and may even be confused with PCB. So what is a PCB? What is PCBA? What is the difference between PCB and PCBA? Let’s take a closer look.
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 unique characteristics of PCB are summarized as follows:
1. High wiring density, small size and light weight, which is conducive to the miniaturization of electronic equipment.
2. Due to the repeatability and consistency of the graphics, the errors in wiring and assembly are reduced, and the maintenance, debugging and inspection time of the equipment is saved.
3. It is conducive to mechanization and automatic production, which improves labor productivity and reduces the cost of electronic equipment.
4. The design can be standardized to facilitate interchangeability.
PCBA is the abbreviation of Printed Circuit Board + Assembly, which means that PCBA passes through the entire process of PCB blank board SMT loading 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 drilled holes.
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 stands for “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 large in size and not suitable for placement technology. The main production process is: sticking adhesive, plug-in, inspection, wave soldering, printing and finished inspection.
About the difference between PCBA and PCB
From the above introduction, we can know that PCBA generally refers to a processing process. It can also be understood as processing a circuit board into a circuit board that realizes a specific function. In other words, PCBA can be counted after all the processes on the PCB circuit board are completed. . The PCB refers to a circuit board, which has no electronic components and cannot achieve any function.
With the high-speed, high-performance, and ultra-miniaturization of electronic equipment, packaging technology has developed rapidly. Chip size packages CSP and BGA packages are developing towards multiple terminals and narrow lead pitch, and bare chip packages have also been put into practical use. Due to the advancement of these packaging technologies, new requirements are also put forward for the printed circuit board PCB, that is, to meet the needs of high density packaging and high speed.
In the past, electronic product manufacturers wanted to complete the production of a complete circuit board. They usually needed to purchase an empty PCB and then contact the chip manufacturer for processing. The process is very troublesome, and the cost is also a lot. Nowadays, many manufacturers are willing to choose PCB multi-layer board manufacturers to process patches at the same time as PCBs, or let patch manufacturers replace PCB circuit boards. These two methods save a lot of trouble and speed up production. effectiveness. PCBA processing manufacturers can realize these two fast and effective processing methods, saving customers a lot of trouble.