Emerging memories

Which is one reason MRAM is attracting attention as embedded non-volatile memory for microcontrollers and similar chips?

  1. AIn advanced logic processes embedded flash has become hard to manufacture, and MRAM, which can be built in the interconnect process, is a candidate replacement
  2. BIt has larger capacity and lower cost than DRAM
  3. CIt loses data when the power is turned off
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Answer: A. In advanced logic processes embedded flash has become hard to manufacture, and MRAM, which can be built in the interconnect process, is a candidate replacement

Embedding flash memory in logic LSIs requires many dedicated process steps and has become difficult in advanced processes. MRAM can be built into the interconnect process by forming MTJs between wiring layers, making it easy to integrate with logic, so it is being adopted as a replacement for embedded flash.

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More Emerging memories questions

  1. In MRAM, what problem tends to arise if the storage element (MTJ) is made too small?
  2. Why have MTJs with magnetization perpendicular to the film plane (perpendicular MTJs) become mainstream in recent STT-MRAM?
  3. In a cross-point memory with resistive elements placed at the intersections of row and column lines, which element is placed in series with the storage element to prevent current from sneaking through unselected cells?
  4. Which is a characteristic of a FeFET, which uses a ferroelectric as the gate insulator?
  5. In phase-change memory (PCM), what is the phenomenon in which the resistance of the amorphous state gradually increases over time?