As we know, 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? How did PCBA evolve? What is the difference between PCB and PCBA? Let HX ELECTRONIC introduce it in detail below.
The power supply PCB board is the abbreviation of Printed Circuit Board, translated into Chinese, which 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, and the power supply PCB board is the support of the electronic components and the carrier of the electrical connection of the electronic components.
PCB has been extremely widely used in the manufacture 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 power supply PCB board graphics, the wiring and assembly errors are reduced, and the maintenance, debugging and inspection time of the equipment is saved.
3. It is conducive to mechanization and automated production, 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 manufacturing process of PCB blank board SMT and then DIP plug-in.
Note: Both SMT and DIP are ways to integrate parts on the PCB. The main difference is that SMT does not need to drill holes on the power supply 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 micro-small parts on the PCB. The production process is: power supply PCB board positioning, printing solder paste, mounter mounting, and return welding furnace and finished inspection.
DIP stands for "plug-in", that is, inserting parts on the power PCBA. 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.
1. The difference in function
The role of PCB is to make a program (including data) that cannot run independently in a multi-program environment, become a basic unit that can run independently, a process that can be executed concurrently with other processes; it is a process that can be executed by the process scheduler in the process. The program code segment executed on the CPU.
Excellent circuit design in PCBA board can save production cost and achieve good circuit performance and heat dissipation performance.
2. The difference in essence
PCB is the only sign of the existence of a process, and the PCB process control block is a static description of the process. PCB is the support of electronic components and the provider of circuit connection of electronic components.
The PCBA board is essentially a production process, and the power PCB empty board goes through the SMT assembly or the entire manufacturing process of the DIP plug-in.
From the above introduction, it can be seen that PCBA generally refers to a processing process, which can also be understood as a finished circuit board, that is, PCBA can be counted after all the processes on the PCB board are completed. The PCB assembly supplier refers to an empty printed circuit board with no parts on it.
So in general: the PCBA board is a finished board; the PCB board is a bare board.