What is DFM in PCBA processing?
1.What is DFM?
The full name of DFM is Design for Manufacture. During the product design stage, the manufacturing process and requirements are taken into consideration, and the design is optimized to make product manufacturing and assembly easier, while reducing costs and improving quality and efficiency.
2.Common poor PCB design
1. The component package size is wrongly selected; 2. Test holes are designed on the pad; 3. There are only 7 chip components on the bottom surface; 4. There are no ICT test points; 5. The metal shell of the crystal oscillator contacts the pad and is short-circuited; 6. Multiple components interfere with each other.
3.Why does PCBA manufacturing require DFM analysis?
IPC statistics
More than 60% of products are caused by early design concepts. More than 75% of manufacturing costs are determined by design drawings and specifications. More than 80% of product defects are caused by problems in the design stage.
What are the hazards caused in PCBA production due to design reasons?
1. Cause a large number of welding or assembly defects; 2. Increase the workload of rework; 3. Increase the process flow; 4. Increase manufacturing costs; 5. Rework may damage parts; 6. Affect product reliability after rework; 7. Increase process difficulty. , reducing production efficiency; 8. Unable to produce and ship in time.
Obviously, PCBA has a wide range of application fields, market product demands are diversified, and product updates are rapid, ranging from aerospace and industrial equipment to mobile phones, watches, and remote controls. Conducting DFM when there is no formal production can solve most of the subsequent problems.
4.How to do DFM?
Steps to conduct DFM analysis
1. Select the products or components that require DFM analysis; 2. Collect information on materials, processes, equipment, etc. related to product manufacturing. 3. Based on the collected manufacturing information, evaluate the manufacturability of the product and identify potential problems and difficulties. 4 Based on the evaluation results, formulate optimized product designs and improve manufacturing processes.
DFM can help PCBA find errors in time during manufacturing, reduce defects in later stages, reduce repairs, improve work efficiency, and speed up production progress. It is essential for PCBA production.
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