Design for Manufacturability (DFM) checks are a critical link in PCB design, aiming to bridge the gap between design and production, reduce manufacturing defects, improve yield, and lower costs. DFM checks cover the entire design process, focusing on whether the design is compatible with the manufacturer’s equipment capabilities, process limitations, and industry standards (such as IPC-2221 and IPC-7351). A comprehensive DFM check can avoid costly design iterations and production delays, as 60-80% of product costs are determined during the design phase.

The core items of DFM checks include wiring and spacing, hole and pad design, layer alignment, and soldermask/silkscreen optimization. For wiring, DFM checks verify that the minimum line width and line spacing meet the manufacturer’s capabilities—usually not less than 0.1mm—to avoid short circuits or open circuits caused by etching defects. For high-speed signal lines, impedance control is also checked using professional formulas to ensure signal integrity. In terms of holes and pads, the minimum hole diameter (typically not less than 0.2mm for mechanical drilling) and the matching between pad size and component pins are verified; the pad diameter is generally 0.3mm larger than the hole diameter to ensure reliable soldering and avoid drilling deviations.

Other key DFM checks include layer alignment and testability. Layer alignment tolerance is controlled within 0.05mm to prevent signal integrity issues caused by layer offset, especially for blind and buried vias. Test points are required for each key network, with a diameter of no less than 0.5mm and a spacing of no less than 1.0mm, preferably placed at the board edge for convenient needle bed testing. Additionally, thermal management and material selection are checked: high-power components should be equipped with heat dissipation holes or copper pours, and the substrate’s glass transition temperature (Tg) should be above 130°C to avoid deformation. Soldermask  should be 0.1mm larger than the pad, and silkscreen text height should be no less than 0.8mm to ensure readability and avoid covering pads.