Encoding method of chip identification serial number and device thereof

Abstract

The invention provides an encoding method of the chip identification serial number, which uses the wafer batch number, the etched number and the flow number of the chip for encoding. Thereby, not only the repeat frequency of the identification serial number is greatly reduced, but also the tracking thereafter is facilitated. The invention further provides an encoding device for the chip identification serial number.

Description

technical field [0001] The present invention relates to a nonvolatile memory, in particular to a method for encoding an identification serial number applied to a nonvolatile memory and a device thereof. Background technique [0002] Generally speaking, when each non-volatile memory leaves the factory, an identification number will be written inside it for identification. Traditionally, the identification number is generated in the form of serial code, for example: wafer A, B, C Assuming that there are 10,000 chips each, the chip identification number in wafer A will be coded from 0 to 9999, and the chip identification number in wafer B will continue from the last number of wafer A, from 10000 to 19999. The chip identification number in wafer C is programmed from 20000 to 29999, and so on. In principle, the coding of the chip identification serial number of the next wafer is to continue the last identification serial number of the previous wafer, until the digits of the iden...

AI Technical Summary

Problems solved by technology

The biggest advantage of the above identification number encoding method is that it is simple to arrange, but the disadvantage is that the numbers between one batch of chips and another batch of chips (that is, the identification number) must be repeated (because they all start from 0), but the repetition rate Therefore, it is difficult to trace its source from an identification number (which batch of wafers it belongs to)

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