Magnetic tunnel junction based chip identification

The present invention provides integrated circuit chips having chip identification aspects. The chips include magnetic tunnel junction (MTJ) structures, and more specifically, include permanent bit strings used for chip identification and/or authentication. Systems and processes for chip identificat...

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Bibliographic Details
Main Authors Annunziata Anthony J, Trouilloud Philip L, Kothandaraman Chandrasekharan
Format Patent
LanguageEnglish
Published 14.02.2017
Subjects
BASIC ELECTRIC ELEMENTS
CALCULATING
COMPUTING
COUNTING
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
HANDLING RECORD CARRIERS
INFORMATION STORAGE
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
SEMICONDUCTOR DEVICES
STATIC STORES
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Summary:The present invention provides integrated circuit chips having chip identification aspects. The chips include magnetic tunnel junction (MTJ) structures, and more specifically, include permanent bit strings used for chip identification and/or authentication. Systems and processes for chip identification are also disclosed herein. The MTJ element structures provided herein can have a defined resistance profile such that the intrinsic variability of the MTJ element structure is used to encode and generate a bit string that becomes a fingerprint for the chip. In some embodiments, an oxygen treatment covering all or a selected portion of an array of MTJ elements can be used to create a mask or secret key that can be used and implemented to enhance chip identification.
Bibliography:Application Number: US201615166981