Discrete assembly backward traceability and semiconductor device forward traceability

The invention discloses a system for providing backward and forward traceability through a method of identifying a discrete assembly (a bare core, a substrate and/or a passive element) in a semiconductor device. A technology used for generating a unique identifier is further included, the unique identifier is used for marking the semiconductor device, and the semiconductor device and the discrete assembly in the device can be tracked and retrospected under the condition of each process and test in the process of producing the semiconductor device.