source:Industry News release time:2022-03-30 Article author:sznbone Popular:pcb
Many people have been wondering, what is the difference between PCBA and PCB? If you look at the name alone, it is actually just one less English letter "A", but if you look at it in essence, the difference is big. PCBA design for manufacturability includes PCB design for manufacturability and PCBA assembly design (or assembly design).
PCB manufacturability design focuses on "manufacturability", and the design content includes board selection, crimp structure, annular ring design, resistance welding design, surface treatment and imposition design. These designs are related to the processing power of the PCB. Restricted by processing methods and capabilities, the designed minimum line width and line spacing, minimum hole diameter, minimum solder ring width and minimum solder mask gap must meet the processing capability of the PCB, and the designed laminate structure must meet the processing technology of the PCB. Therefore, the focus of PCB design for manufacturability is to meet the process capability of the PCB factory. Understanding the manufacturing method, process flow and process capability of PCB is the basis for implementing process design
The focus of PCBA design for manufacturability is "assembly", that is, to establish stable and solid manufacturability to achieve high-quality, high-efficiency, and low-cost soldering. Design includes packaging selection, pad design, assembly method design, component layout, wire mesh design, etc. All of these design requirements focus on higher welding yields, higher manufacturing efficiencies, and lower manufacturing costs. Therefore, it is very important to understand the process characteristics, common bad welding phenomena and influencing factors of various packagings.
Neither PCB design for manufacturability nor PCBA design for manufacturability can simply focus on a single design element, such as component selection. 0201 is the most commonly used package for mobile phone boards, but it is not suitable for communication boards. In the design, the manufacturability of the veneer must be comprehensively and systematically considered, that is, the "integrated" design concept of repetitive strength.
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