Fully programmable redundancy circuits for STT-MRAM

Dong Gi Lee, Sang Gyu Park

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

We propose fully programmable redundancy schemes for spin-transfer-torque magnetic random access memories (STT-MRAMs). To store redundancy information, these schemes use magnetic tunnel junctions (MTJs), which are core memory elements of STT-MRAMs. This can greatly simplify the fabrication process of STT-MRAMs. Furthermore, it also allows reprogramming of the redundancy information after packaging or even during normal use by end-users without requiring any special high-voltage setup. We propose two redundancy schemes. First, we propose an address comparator, which uses MTJs and is a direct replacement of a conventional address comparator. Second, we propose a scheme in which the redundancy circuits share the storage cells and read-write peripheral circuits with the normal data array structure.

Original languageEnglish
Article number7968323
JournalIEEE Transactions on Magnetics
Volume53
Issue number10
DOIs
StatePublished - 2017 Oct

Keywords

  • Magnetic tunnel junction (MTJ)
  • Redundancy circuit
  • Spin-transfer-torque magnetic random access memory (STT-MRAM)
  • Yield enhancement

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