System for tracing printed circuit boards through manufacturing stages

A traceability system of a printed circuit board comprising at least two first inner copper foil substrates, the traceability system comprising:

• an identification code marking device comprising:
• a coding unit configured to mark an identification code on each inner copper foil substrate;
• a scanning unit configured to emit X-rays after adding a second inner copper foil substrates so that the X-rays pass through the second inner copper foil substrate to scan the identification code of the first inner copper foil substrate, and generate an identification code graphic;
• a reading unit configured to receive and parse the identification code graphic, and determine a next identification code according to a predetermined encoding rule and the parsed identification code graphic, the predetermined encoding rule being that each identification code records an identity information of the first inner copper foil substrate and the second inner copper foil substrate, and the identification code of the second inner copper foil substrate associated with the identification code of the first inner copper foil substrate;
• the coding unit further configured to mark determined identification code on second inner copper foil substrate;
• and
• a server communicating with the identification code marking device and comprising:
• a storage device that stores one or more programs and a database;
• and
• a processor;
• the one or more programs when executed by the processor, cause the processor to:
• store the identity information recorded by the identification code of the first inner copper foil substrate and the second inner copper foil substrate and processing information and processing information of the first inner copper foil substrate and the second inner copper foil substrate in the database.