Static information storage and retrieval – Read/write circuit – Testing
Reexamination Certificate
2007-05-29
2007-05-29
Ho, Hoai V. (Department: 2827)
Static information storage and retrieval
Read/write circuit
Testing
C365S158000, C365S185080, C365S189020, C365S189050, C365S096000, C365S154000, C365S230030, C365S230080
Reexamination Certificate
active
11486192
ABSTRACT:
Magnetic Random Access Memory (MRAM) can be programmed and read as fast as Static Random Access Memory (SRAM) and has the non-volatile characteristics of electrically eraseable programmable read only memory (EEPROM), FLASH EEPROM or one-time-programmable (OTP) EPROM. Due to the randomness of manufacturing process, the magnetic tunnel junctions (MTJ) in MRAM cells will require different row and column current combinations to program and not to disturb the other cells. Based on adaptive current sources for programming, this disclosure teaches methods, designs, test algorithms and manufacturing flows for generating EEPROM, FLASH EEPROM or OTP EPROM like memories from MRAM.
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Shi Xi Zeng
Wang Po-Kang
Yang Bruce
Yang Hsu Kai
Ackerman Stephen B.
Applied Spintronics Inc.
Headway Technologies Inc.
Ho Hoai V.
Saile Ackerman LLC
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