PCB traceability: a practical guide
Unique identifiers, permanent marking, data capture and what IPC-1782 actually asks of an assembly line.
PCB traceability means each board carries a unique, permanently readable identifier, and every process it passes through records what happened against that identifier. The mark is the easy half; the data capture and the database behind it are where traceability programmes succeed or fail.
The identifier
It must be unique, permanent and machine-readable after every process the board will see — including aqueous wash and reflow.
That requirement is why laser marking displaces labels and ink in serious programmes.
The capture points
Decide which processes must record against the identifier: paste, placement, reflow, inspection, test, rework.
Every capture point needs a reader and a route into the database.
The record
IPC-1782 frames traceability in terms of the level of detail retained and for how long. The standard describes what to record; your MES holds it.
Agree retention and granularity before buying hardware — they determine how much you need.
Commonly asked
Do we need laser marking for traceability?
You need an identifier that survives the whole process. Labels and ink often do not survive wash and reflow, which is why laser marking is specified — but the requirement is permanence, not the technology itself.
Get the answer for your actual part
A guide can only take you so far. Send us the board, the fluid or the fastener and we will run it, film it, and come back with cycle times and a quote.
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