Related Experiment Video
Updated: May 31, 2025

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
HfO2-based ferroelectric synaptic devices: challenges and engineering solutions
Taegyu Kwon1, Hyeong Seok Choi1, Dong Hyun Lee1
1Department of Materials Science and Engineering & Inter-University Semiconductor Research Center, College of Engineering, Seoul National University, Seoul 08826, Republic of Korea. minhyuk.park@snu.ac.kr.
Abstract:
HfO2-based ferroelectric memories have garnered significant attention for their potential to serve as artificial synaptic devices owing to their scalability and CMOS compatibility. This review examines the key material properties and challenges associated with HfO2-based ferroelectric artificial synaptic devices as well as the recent advancements in engineering strategies to improve their synaptic performance. The fundamental physics and material properties of HfO2-based ferroelectrics are reviewed to understand the theoretical origin of the aforementioned technical issues in ferroelectric HfO2-based synaptic devices. Based on the understanding, strategies to resolve the various technical issues from the device to array level are discussed, along with reviewing important progresses in recent studies. Based on these recent technical advancements, new perspectives to achieve high performance and highly reliable HfO2-based ferroelectric synaptic devices and their array are provided.
Related Concept Videos
Biasing of FET
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
Biasing of Metal-Semiconductor Junctions
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
MOSFET: Enhancement Mode
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
Metal-Semiconductor Junctions
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
Field Effect Transistor
Characteristics of MOSFET
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable...

