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Alscn-Based Acoustic Resonators Utilizing Piezoelectric and Ferroelectric Effects
Alscn-Based Acoustic Resonators Utilizing Piezoelectric and Ferroelectric Effects
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105546
- ISBN
- 9798265405029
- DDC
- 620
- 저자명
- Wang, Jialin.
- 서명/저자
- Alscn-Based Acoustic Resonators Utilizing Piezoelectric and Ferroelectric Effects
- 발행사항
- [Sl] : Georgia Institute of Technology, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 142 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-05, Section: A.
- 주기사항
- Advisor: Ansari, Azadeh.
- 학위논문주기
- Thesis (Ph.D.)--Georgia Institute of Technology, 2024.
- 초록/해제
- 요약The increasing consumer demand for high downloading speed and reliable communication channels has driven the development of the next-generation communication technologies, resulting in more complicated RF front-end modules with many integrated acoustic filters operating at much higher frequency ranges to avoid the overcrowded channels that are currently in use.This thesis focuses on the AlScN-based FBAR device due to its ability to scale up the resonant frequencies with high acoustic performance. Chapter 1 will state the motivation behind this research. Then, chapter 2 will introduce the acoustic performance of the sputtered AlScN-based FBAR and C-FBAR structure, demonstrating the first intrinsically switchable FBARs with one of the highest kt 2 (18.1%) reported to date at ~3 GHz. Next, the TCF and the voltage modulation of the resonant frequency of the FBARs are measured. Thanks to their wide bandgap, the FBARs demonstrate excellent high-temperature stability compared to other piezoelectric and ferroelectric materials.Chapter 3 will discuss the electrical and acoustic performance of the AlScN thin films and FBARs utilizing the ferroelectric behavior. Due to the intrinsic polarization switching ability and the permittivity modulation, ferroelectric materials show promising prospects as the material of choice for tunable/switchable resonators and tunable capacitors (varactors). Amongst popular ferroelectric materials, Aluminum Scandium Nitride (AlScN) acoustic devices have shown promising results for reconfigurable filter applications due to the simultaneous existence of excellent piezoelectric and ferroelectric properties. The fabricated FBARs show two operating states depending on the polarization of the AlScN thin film for the first time. The electrical properties of the AlScN-based metalferroelectric-meal (MFM) capacitors have also been demonstrated with polarizationdependent CV modulation and duo resistance states. In the future, the MFM capacitor will be used as a varactor to in tunable hybrid acoustic filters. Furthermore, the hightemperature electric and acoustic characterization of the AlScN devices is studied in Chapter 3. Here, the temperature dependence of the coercive field (-6.7kV/cmK) has been reported for the first time, showing a linearly decreasing trend. The DC frequency tunning of ~3% (-110V to +80V) is achieved at a high temperature 3 times higher than the room temperature. This chapter aims to understand the physics behind the FBAR switching mechanism and to fabricate sub-6GHz tunable hybrid filters.On the other hand, the evolution of the 5G market has pushed the research focus to FBARs operating in mmWave frequencies. Chapter 4 of this dissertation will focus on designing, fabricating, and characterizing the ultra-thin film FBARs operating between 18- 23GHz. The ultra-thin film used in this work has a fully epitaxial-grown resonating stack, resulting in not only a perfect single crystalline structure of the piezoelectric layer but also a perfect metal/piezoelectric contact, which improves the resonant device performance by removing the effect of thin oxide formed on top of the piezoelectric layer. This work also utilized a cascaded FBAR (cas-FBAR) structure that maximized the active area and improved the power handling capability of the fabricated devices, demonstrating one of the highest figure of merit (kt 2 x Q, FoM) FBAR devices at similar operating frequencies. Finally, chapter 5 concludes this thesis by proposing future directions toward optimizing the device.
- 일반주제명
- Random access memory
- 일반주제명
- Communication channels
- 일반주제명
- Radio frequency
- 일반주제명
- Residual stress
- 일반주제명
- High temperature
- 일반주제명
- Metal fatigue
- 일반주제명
- Etching
- 일반주제명
- Aluminum
- 일반주제명
- Design
- 일반주제명
- Lead
- 일반주제명
- Communications systems
- 일반주제명
- Acoustics
- 일반주제명
- Transistors
- 일반주제명
- Thin films
- 일반주제명
- Analytical chemistry
- 일반주제명
- Condensed matter physics
- 일반주제명
- Electrical engineering
- 일반주제명
- Materials science
- 일반주제명
- Thermodynamics
- 기본자료저록
- Dissertations Abstracts International. 87-05A.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2024 us c eng d■001000017360551
■00520260202105546
■006m o d
■007cr#unu||||||||
■020 ▼a9798265405029
■035 ▼a(MiAaPQ)AAI32315569
■035 ▼a(MiAaPQ)GeorgiaTech75617
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a620
■1001 ▼aWang, Jialin.
■24510▼aAlscn-Based Acoustic Resonators Utilizing Piezoelectric and Ferroelectric Effects
■260 ▼a[Sl]▼bGeorgia Institute of Technology▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a142 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: A.
■500 ▼aAdvisor: Ansari, Azadeh.
■5021 ▼aThesis (Ph.D.)--Georgia Institute of Technology, 2024.
■520 ▼aThe increasing consumer demand for high downloading speed and reliable communication channels has driven the development of the next-generation communication technologies, resulting in more complicated RF front-end modules with many integrated acoustic filters operating at much higher frequency ranges to avoid the overcrowded channels that are currently in use.This thesis focuses on the AlScN-based FBAR device due to its ability to scale up the resonant frequencies with high acoustic performance. Chapter 1 will state the motivation behind this research. Then, chapter 2 will introduce the acoustic performance of the sputtered AlScN-based FBAR and C-FBAR structure, demonstrating the first intrinsically switchable FBARs with one of the highest kt 2 (18.1%) reported to date at ~3 GHz. Next, the TCF and the voltage modulation of the resonant frequency of the FBARs are measured. Thanks to their wide bandgap, the FBARs demonstrate excellent high-temperature stability compared to other piezoelectric and ferroelectric materials.Chapter 3 will discuss the electrical and acoustic performance of the AlScN thin films and FBARs utilizing the ferroelectric behavior. Due to the intrinsic polarization switching ability and the permittivity modulation, ferroelectric materials show promising prospects as the material of choice for tunable/switchable resonators and tunable capacitors (varactors). Amongst popular ferroelectric materials, Aluminum Scandium Nitride (AlScN) acoustic devices have shown promising results for reconfigurable filter applications due to the simultaneous existence of excellent piezoelectric and ferroelectric properties. The fabricated FBARs show two operating states depending on the polarization of the AlScN thin film for the first time. The electrical properties of the AlScN-based metalferroelectric-meal (MFM) capacitors have also been demonstrated with polarizationdependent CV modulation and duo resistance states. In the future, the MFM capacitor will be used as a varactor to in tunable hybrid acoustic filters. Furthermore, the hightemperature electric and acoustic characterization of the AlScN devices is studied in Chapter 3. Here, the temperature dependence of the coercive field (-6.7kV/cmK) has been reported for the first time, showing a linearly decreasing trend. The DC frequency tunning of ~3% (-110V to +80V) is achieved at a high temperature 3 times higher than the room temperature. This chapter aims to understand the physics behind the FBAR switching mechanism and to fabricate sub-6GHz tunable hybrid filters.On the other hand, the evolution of the 5G market has pushed the research focus to FBARs operating in mmWave frequencies. Chapter 4 of this dissertation will focus on designing, fabricating, and characterizing the ultra-thin film FBARs operating between 18- 23GHz. The ultra-thin film used in this work has a fully epitaxial-grown resonating stack, resulting in not only a perfect single crystalline structure of the piezoelectric layer but also a perfect metal/piezoelectric contact, which improves the resonant device performance by removing the effect of thin oxide formed on top of the piezoelectric layer. This work also utilized a cascaded FBAR (cas-FBAR) structure that maximized the active area and improved the power handling capability of the fabricated devices, demonstrating one of the highest figure of merit (kt 2 x Q, FoM) FBAR devices at similar operating frequencies. Finally, chapter 5 concludes this thesis by proposing future directions toward optimizing the device.
■590 ▼aSchool code: 0078.
■650 4▼aRandom access memory
■650 4▼aCommunication channels
■650 4▼aRadio frequency
■650 4▼aResidual stress
■650 4▼aHigh temperature
■650 4▼aMetal fatigue
■650 4▼aEtching
■650 4▼aAluminum
■650 4▼aDesign
■650 4▼aLead
■650 4▼aCommunications systems
■650 4▼aAcoustics
■650 4▼aTransistors
■650 4▼aThin films
■650 4▼aScanning electron microscopy
■650 4▼aAnalytical chemistry
■650 4▼aCondensed matter physics
■650 4▼aElectrical engineering
■650 4▼aMaterials science
■650 4▼aThermodynamics
■690 ▼a0389
■690 ▼a0986
■690 ▼a0486
■690 ▼a0611
■690 ▼a0544
■690 ▼a0794
■690 ▼a0348
■71020▼aGeorgia Institute of Technology.
■7730 ▼tDissertations Abstracts International▼g87-05A.
■790 ▼a0078
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360551▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


