Adaptive algorithm for MRAM manufacturing
US7224628B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 13, 2006 |
| Grant date | May 29, 2007 |
| Priority date | — |
| Expiry date | Jul 13, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C29/50
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.