Popular interpretation of PCBA

Popular interpretation of PCBA

There are many professional explanations about PCBA on the Internet, which is difficult to understand. Today, I will explain PCBA to you in the most popular language.

In a word, PCBA is the whole process of making a good and usable circuit board from scratch. This process mainly includes:

1. The production of PCB (i.e. bare board without any electronic components) is mainly based on the designed PCB document, which is the process of turning the design document into a real object;

2. According to the PBCA document, assemble various predetermined electronic components on the PCB. According to the packaging specifications of various electronic components, there are mainly two assembly methods: SMT mounting and DIP insertion. For the assembly of electronic components on PCB, SMT mounting is usually completed first, and then DIP insertion is completed. SMT mounting is usually automatically assembled by machines and equipment after being programmed, while DIP mounting is mostly manually assembled, and some are automatically assembled by equipment after being programmed. However, the price of DIP mounting automatic assembly equipment is much higher than that of SMT mounting automatic assembly equipment. Moreover, at present, most electronic components on the circuit board are SMT mounted (and a few DIP), or even all SMT mounted. Therefore, unless there are many plug-ins in a certain circuit board and the production quantity is large, the automatic insertion equipment will be selected to complete the DIP insertion, otherwise, the DIP insertion will usually be completed manually.

3. Test. The main purpose of the inspection is to ensure that the PCB material and circuit fully meet the requirements of the design documents, without differences and open circuit; Ensure that the electronic components on the PCB are correctly assembled and there are no missing, wrong, reversed, poorly welded, damaged components, etc; To ensure that all electronic components on the PCB can be used normally. With the development of modern science and technology, the detection of circuit boards has also developed from the original manual detection to many automatic detection by machines and equipment, which not only liberates the labor force of manual detection, but also greatly improves the efficiency and accuracy of detection.

4. According to the requirements of the design documents, burn the designed program for the designated electronic components (mainly IC), that is, complete the software installation. To ensure that the entire circuit board can achieve certain specific functions.

After the above steps, according to the designed relevant board making documents, first make a PCB (bare board), and then assemble the electronic components purchased according to the BOM to the PCB (bare board) according to the board making documents. After testing to ensure that the hardware is correct, install the software program, and after testing to ensure that the relevant functions can be realized normally, basically complete a sound and usable circuit board from scratch. This whole process is called PCBA. Of course, there are still many details to be completed in this process, including the handling of some unexpected events.

The above is a popular explanation of PCBA.