Patent ID: 9569712
Date: 2017-02-14
CPC Classifications: G06F,G06K,G11C,H01L,H03K

Claim:
1. A method of generating a fingerprint for an array of a plurality of MTJ elements, the method comprising: sensing a first MTJ element by subjecting the first MTJ element in the plurality of MTJ elements to a voltage to generate data for the first element in the plurality of the MTJ elements relative to a first reference data and provide a first sensed MTJ element; sensing a second MTJ element by subjecting the second MTJ element in the plurality of MTJ elements to a voltage to generate data for the second element in the plurality of the MTJ elements relative to a second reference data and provide a second sensed MTJ element; continuing to sequentially sense a predetermined number of MTJ elements in the array of the plurality of MTJ elements by sequentially subjecting subsequent MTJ elements in the array of the plurality of MTJ elements to a voltage to generate data for the subsequent MTJ elements in the array of the plurality of MTJ elements relative to a respective sequential reference data for each of the MTJ elements being sensed and provide a predetermined number of sensed MTJ elements; and collecting the generated data for the sensed MTJ elements to generate a permanent string of the data associated with the array of the MTJ elements, wherein a portion or all of the permanent string of data for the MTJ array comprises an oxygen mask.