Assembly, Polarity and Marking Information

Solution focus

Assembly orientation, polarity and board markings should be made explicit as part of the assembly-production discussion.

Engineering basis

The IPC PCBA checklist places component coordinates, assembly information and manufacturing files in one collaboration chain. Orientation, polarity and silkscreen marks need to be cross-checkable between design data and production communication.

Design focus

• Mark polarity-sensitive devices such as diodes, electrolytics, ICs and connectors
• Define revision, reference and necessary assembly markings
• List DNI, optional, hand-assembly and calibration parts separately

Recommended information

• Component orientation and polarity
• Connector and adjustable-part positions
• Board text, numbering and version marks

Handoff and verification

• Assembly drawing or placement data
• Polarity and orientation-marking rules
• Special assembly, option and calibration notes

Next collaboration step

After the information for assembly, polarity and marking information is confirmed, align the functional, interface, material, assembly and revision information before the next solution discussion.