What is DFM in PCB production?

DFM (Design for manufacture), the design for manufacturing, studies the relationship between the physical design of the product itself and the various parts of the manufacturing system and uses it in product design to integrate the entire manufacturing system for overall optimization. Product design needs to meet the requirements of product manufacturing and have good manufacturability so that products can be manufactured with the lowest cost, the shortest time, and the highest quality. Simply put, it is to make the design suitable for the requirements of the production. The design must fully consider the production situation so that the design can be produced. DFM is a very important link in PCB design and production.

With the rapid development of electronic products, a large number of highly integrated devices such as BGA, QFP, PGA, and CSP are used in PCB production, and the complexity of PCB has also increased greatly. The subsequent PCB design and manufacture are difficult, testing and soldering are difficult. Production problems such as defects, mismatched components, and difficult maintenance. This leads to delays in the entire product construction period, longer development cycles, increased costs, high product repair rates, and product quality risks. At the same time, such products cannot meet the requirements of short time, high reliability, and high stability of military products. DFM technology can reduce the development cycle and cost of the product so that it can be put into production more smoothly. In other words, DFM is to find and solve problems early in the entire product life cycle.

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In PCB design, DFM mainly includes component selection, PCB physical parameter selection, and PCB design details. Device selection mainly refers to the selection of more advantageous devices in terms of procurement, processing, and maintenance. The physical parameters mainly include board thickness/aperture ratio, line width spacing, stacking design, pad aperture setting, etc. In terms of details, it requires engineers' rich experience to make judgments, and any subtle place requires a professional inspection.