Traceability is integral to the lifecycle of printed circuit board (PCB) manufacturing, with each PCB carrying essential data, such as its origin, batch, and production date, forming its identity. Several methods are used for PCB traceability, each with its unique features. Barcodes provide a straightforward solution, allowing manufacturers to encode essential information such as serial numbers and production dates for quick and easy access. QR codes offer an additional layer of detail, capable of storing more information and enabling instant access to data through scanning. RFID tags utilize radio waves for automatic and rapid identification, streamlining the tracking process with advanced technology. Laser marking ensures permanence by etching identification data directly onto the PCB or components. Implementing unique identifiers, such as serial or component numbers, simplifies tracking. Data matrix codes excel in small spaces, offering efficient information storage. The selection of the appropriate method depends on specific requirements, including industry standards, PCB size, and budget considerations, with each approach offering strengths that enhance PCB traceability.
source: https://www.myemssolutions.com/traceability-in-printed-circuit-assemblies-and-its-importance/
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