PCB News - An article to understand the difference between PCBA manufacturability design and PCB manufacturability design

An article to understand the difference between PCBA manufacturability design and PCB manufacturability design

PCBA manufacturability design and PCBmanufacturability design, it seems that there is only one "A" difference, in fact, there is a big difference. PCBA manufacturability design includes PCB manufacturability design and PCBA assembly design (or assembly design ) Two parts.

PCB manufacturability design focuses on "manufacturability", the design content includes plate selection, press-fit structure, ring design, solder mask design, surface treatment and imposition design. These designs are all related to the processing capacity of the PCB, and are limited by the processing method and capacity. The minimum line width and line spacing, minimum aperture, minimum pad ring width, minimum solder mask gap, etc. must be in line with the PCB processing capability, and the design overlaps The layer and laminated structure must conform to the PCB processing technology. Therefore, the focus of PCB manufacturability design is to meet the process capability of the PCB factory. Understanding the manufacturing method, process flow and process capability of the PCB is the basis for the implementation of process design.

The PCBA manufacturability design focuses on "assemblyability", that is, to establish a stable and robust processability to achieve high-quality, high-efficiency and low-cost soldering. The content of the design includes packaging selection, pad design, assembly method design, component layout, stencil design, etc. All these design requirements are developed around higher welding yield, higher manufacturing efficiency, and lower manufacturing costs. Therefore, it is very important to understand the process characteristics, common soldering defects and influencing factors of various packages.

Regardless of PCB manufacturability design or PCBA manufacturability design, it cannot simply focus on individual design elements, such as component selection. 0201 is the most commonly used package for mobile phone boards, but not for communication boards. When designing, it is necessary to comprehensively and systematically consider the manufacturability of the veneer, which is the "integrated" design concept of repeated strength.

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