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Zirconium-Doped Hafnium Oxide Based Ferroelectric Materials for Memory Applications
Zirconium-Doped Hafnium Oxide Based Ferroelectric Materials for Memory Applications
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260209102845
- ISBN
- 9798288816857
- DDC
- 540
- 저자명
- Huang, Fei.
- 서명/저자
- Zirconium-Doped Hafnium Oxide Based Ferroelectric Materials for Memory Applications
- 발행사항
- [Sl] : Stanford University, 2023
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2023
- 형태사항
- 133 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
- 주기사항
- Advisor: Wong, S. Simon.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2023.
- 초록/해제
- 요약As data processing and storage needs continue to grow at a rapid pace, the development of innovative memory technologies is crucial. The discovery of ferroelectricity in hafnia (HfO2)-based materials has garnered significant attention in both academia and industry, owing to their potential to revolutionize non-volatile memory (NVM) technology and enable novel computing architectures. HfO2-based ferroelectric materials offer advantages over conventional perovskite oxides, such as low-temperature synthesis and conformal growth in three-dimensional structures on silicon, making them compatible with complementary metal-oxide-semiconductor (CMOS) technology and ideal for device scaling. However, several challenges still exist for implementing ferroelectric HfO2 in commercial products, such as polarization variation during cycling (wake-up effect), high operation voltage, compatibility with back-end-of-line (BEOL) processing temperatures, and low memory density. In this dissertation, I tackled the challenges outlined above. I began by focusing on the Hf0.5Zr0.5O2 (HZO) material itself and addressing the wake-up effect through the introduction of an HfO2 buffer layer at the HZO/electrode interface. Subsequently, I developed a new measurement setup capable of directly measuring individual nm-sized devices, which enabled investigating the scaling effect in HZO-based ferroelectric capacitors. Through my research, I was able to demonstrate excellent ferroelectricity and reliability in ultra-thin HZO (4 nm) capacitors with molybdenum (Mo) electrodes. These capacitors exhibited low operation voltage, wake-up-free behavior, high endurance, and low RTA temperatures, making them highly desirable for practical applications. I also studied the size scaling effect down to 65 nm x 45 nm devices, where I observed ultra-high remanent polarization (2Pr) for the first time at this scale. In addition to exploring two-dimensional scaling to improve density, I also proposed a hybrid structure for 4 bits/cell storage, increasing the multi-bit capability in a single cell.
- 일반주제명
- Crystal structure
- 일반주제명
- Behavior
- 일반주제명
- Random access memory
- 일반주제명
- Electrodes
- 일반주제명
- Electric fields
- 일반주제명
- Metal fatigue
- 일반주제명
- CMOS
- 일반주제명
- Engineering
- 일반주제명
- Transistors
- 일반주제명
- Thin films
- 일반주제명
- Ferroelectrics
- 일반주제명
- Radiation
- 일반주제명
- Electromagnetics
- 일반주제명
- Electrical engineering
- 키워드
- Ferroelectricity
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 87-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260209102845
■006m o d
■007cr#unu||||||||
■020 ▼a9798288816857
■035 ▼a(MiAaPQ)AAI32201023
■035 ▼a(MiAaPQ)Stanfordxf591sb3621
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a540
■1001 ▼aHuang, Fei.
■24510▼aZirconium-Doped Hafnium Oxide Based Ferroelectric Materials for Memory Applications
■260 ▼a[Sl]▼bStanford University▼c2023
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2023
■300 ▼a133 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-02, Section: B.
■500 ▼aAdvisor: Wong, S. Simon.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2023.
■520 ▼aAs data processing and storage needs continue to grow at a rapid pace, the development of innovative memory technologies is crucial. The discovery of ferroelectricity in hafnia (HfO2)-based materials has garnered significant attention in both academia and industry, owing to their potential to revolutionize non-volatile memory (NVM) technology and enable novel computing architectures. HfO2-based ferroelectric materials offer advantages over conventional perovskite oxides, such as low-temperature synthesis and conformal growth in three-dimensional structures on silicon, making them compatible with complementary metal-oxide-semiconductor (CMOS) technology and ideal for device scaling. However, several challenges still exist for implementing ferroelectric HfO2 in commercial products, such as polarization variation during cycling (wake-up effect), high operation voltage, compatibility with back-end-of-line (BEOL) processing temperatures, and low memory density. In this dissertation, I tackled the challenges outlined above. I began by focusing on the Hf0.5Zr0.5O2 (HZO) material itself and addressing the wake-up effect through the introduction of an HfO2 buffer layer at the HZO/electrode interface. Subsequently, I developed a new measurement setup capable of directly measuring individual nm-sized devices, which enabled investigating the scaling effect in HZO-based ferroelectric capacitors. Through my research, I was able to demonstrate excellent ferroelectricity and reliability in ultra-thin HZO (4 nm) capacitors with molybdenum (Mo) electrodes. These capacitors exhibited low operation voltage, wake-up-free behavior, high endurance, and low RTA temperatures, making them highly desirable for practical applications. I also studied the size scaling effect down to 65 nm x 45 nm devices, where I observed ultra-high remanent polarization (2Pr) for the first time at this scale. In addition to exploring two-dimensional scaling to improve density, I also proposed a hybrid structure for 4 bits/cell storage, increasing the multi-bit capability in a single cell.
■590 ▼aSchool code: 0212.
■650 4▼aCrystal structure
■650 4▼aTransmission electron microscopy
■650 4▼aBehavior
■650 4▼aRandom access memory
■650 4▼aElectrodes
■650 4▼aElectric fields
■650 4▼aMetal fatigue
■650 4▼aCMOS
■650 4▼aEngineering
■650 4▼aResearch & development--R&D
■650 4▼aTransistors
■650 4▼aThin films
■650 4▼aFerroelectrics
■650 4▼aRadiation
■650 4▼aElectromagnetics
■650 4▼aElectrical engineering
■653 ▼aFerroelectricity
■653 ▼aNon-volatile memory technology
■653 ▼aFerroelectric capacitors
■690 ▼a0537
■690 ▼a0544
■690 ▼a0607
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g87-02B.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2023
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17365876▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


