A comprehensive variability study of doped HfO2 FeFET for memory applications
2022 IEEE International Memory Workshop (IMW)(2022)
Abstract
We present the results of an extensive analysis of 3 different elements (Si, Gd and Y) used as dopants for HfO
2
in ferroelectric FET (FeFET). Firstly, the ferroelectric response of doped HfO
2
has been characterized on simple Metal / Ferroelectric / Insulator / Semiconductor (MFIS) capacitors, and the mean domain size of crystallized HfO
2
for the 3 dopants has been measured by Piezo Force Microscopy (PFM). Secondly endurance and retention have been tested on FeFETs; the effect of variations in the gate stack to enhance the memory window (MW) has been also evaluated. Thirdly, a thorough study of variability in the pristine state and as function of bipolar cycling have been carried out on the 3 types of FeFETs. A link is drawn between domain size and variability; a certain degree of non-uniformity is shown to be intrinsic to ferroelectric HfO
2
.
MoreTranslated text
Key words
Ferroelectric Memory,HfO2,Si,Gd,Y,FeFET,PFM,Memory Window,Endurance,Variability,Pelgrom plot
AI Read Science
Must-Reading Tree
Example
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined