PCB News - PCB manufacturers: the expansion of the design concept for manufacturability

PCB manufacturers: the expansion of the design concept for manufacturability

The DFM concept was first proposed by the American Assembly Association in 1995 and was limited to PCB/PCBA. In the late 1990s, it was introduced to the country by Professor Xue Jingcheng from Singapore; "Circuit Manufacturability Design" was a new design concept proposed in 1998. It does not involve specific circuit design, nor does it introduce specific process methods. What it wants to solve is the interface relationship between circuit design and electronic manufacturing. Its purpose is to speed up the development progress, reduce production costs, and establish a rapid response platform for my country's electronic products. And product quality problems often lie in the interface between circuit design and process manufacturing! Its typical performance is: design does not know how to manufacture, and process does not understand design.

Printed circuit boardmanufacturability design is an internationally advanced design concept that emerged in the mid-1990s, and involves printed circuit boards, complete machines and unit modules, radio frequency cable assemblies, multi-core radio frequency cable assemblies and microwave circuit modules The circuit manufacturability design included is the cutting-edge technology and advanced design concept of the electronic manufacturing industry in the 21st century.

If electronic research institutes and production units want to develop in the miniaturization and reliability of electronic products, they must attach great importance to manufacturability design, and strive to create a corporate manufacturability design culture. Improve the manufacturability design process in the new product introduction process. Only by establishing a strict and complete electronic product manufacturability design introduction process, can we ensure that the designed product meets the actual situation of the unit and establish a rapid response platform for electronic equipment.

Design for manufacturability is a system engineering, which can be roughly divided into board level and complete machine/cable assembly level in terms of electronic assembly. The board level can be divided into general PCB/PCBA and Micro-PCB-PCBA. Only PCB/PCBA manufacturability design content is very rich, including: PCBA manufacturability design defect case analysis; circuit manufacturability design basic concept; The relationship between circuit manufacturability design and prohibited (restricted) processes; the core concept of modern electronic assembly; PCBA-DFM procedures; PCB drawing regulations and the relationship with electronic assembly; acceptable conditions for high-reliability PCBs; high-reliability electronic equipment Requirements for selection of electronic components; basic content of PCB manufacturability design application SMT component layout design and chip component pad design; SMT chip component pad design; component layout design and pad using wave soldering process Graphic design; component installation design; PCBA design for testability (DFT) other design experience SMT equipment design requirements; PCBA manufacturability design review PCBA lead-free mixed assembly process DFM and welding technology.

How to ensure product quality from DFM-DFA and electronic assembly logistics process control and process optimization design? How to comply with the requirements of prohibited and restricted processes? How to optimize the process design of cable assemblies and microwave circuit boards? What kind of design and assembly can be mastered to meet the welding quality requirements of electronic complete machines, microwave modules, and cable assemblies? And how to correctly set and verify the welding temperature of manual welding? and many more.

The scope of DFM involves the entire electronic equipment, and only the implementation of PCBA-DFM analysis software development and application requires a strong technical knowledge.

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