Demonstration of Fatigue and Recovery Phenomena in Hf0.5 Zr0.5 O2 -based 1T1C FeRAM Memory Arrays
2022 6th IEEE Electron Devices Technology & Manufacturing Conference (EDTM)(2022)
摘要
Recently, a novel, one-transistor one-capacitor (1T1C) type, ferroelectric random-access memory (FeRAM) array was developed, and its operation was experimentally demonstrated. This array was based on ferroelectric Hf
0.5
Zr
0.5
O
2
(HZO), with a capacitor under bitline structure, and was compatible with system-on-chip. In this work, bitline voltage difference distributions were examined via cycling tests and observed to not deteriorate during fatigue and recovery stress, indicating uniform charge trapping and domain de-pinning within the ferroelectric domains in the test chip.
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关键词
Fatigue,recovery and FeRAM array
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