Download or read book Capacitive Silicon Resonators written by Nguyen Van Toan and published by CRC Press. This book was released on 2019-07-10 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microfabricated resonators play an essential role in a variety of applications, including mass sensing, timing reference applications, and filtering applications. Many transduction mechanisms including piezoelectric, piezoresistive, and capacitive mechanisms, have been studied to induce and detect the motion of resonators. This book is meant to introduce and suggest several technological approaches together with design considerations for performance enhancement of capacitive silicon resonators, and will be useful for those working in field of micro and nanotechnology. Features Introduces and suggests several technological approaches together with design considerations for performance enhancement of capacitive silicon resonators Provides information on the various fabrication technologies and design considerations that can be employed to improve the performance capacitive silicon resonator which is one of the promising options to replace the quartz crystal resonator. Discusses several technological approaches including hermetic packaging based on the LTCC substrate, deep reactive ion etching, neutral beam etching technology, and metal-assisted chemical etching, as well as design considerations for mechanically coupled, selective vibration of high-order mode, movable electrode structures, and piezoresistive heat engines were investigated to achieve small motional resistance, low insertion loss, and high quality factor. Focusses on a capacitive sensing method based on the measurement of the change in capacitance between a sensing electrode and the resonant body. Reviews recent progress in performance enhancement methods for capacitive silicon resonator, which are mainly based on the works of the authors.

Download or read book Capacitive Silicon Resonators written by Nguyen Van Toan and published by CRC Press. This book was released on 2019-07-10 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microfabricated resonators play an essential role in a variety of applications, including mass sensing, timing reference applications, and filtering applications. Many transduction mechanisms including piezoelectric, piezoresistive, and capacitive mechanisms, have been studied to induce and detect the motion of resonators. This book is meant to introduce and suggest several technological approaches together with design considerations for performance enhancement of capacitive silicon resonators, and will be useful for those working in field of micro and nanotechnology. Features Introduces and suggests several technological approaches together with design considerations for performance enhancement of capacitive silicon resonators Provides information on the various fabrication technologies and design considerations that can be employed to improve the performance capacitive silicon resonator which is one of the promising options to replace the quartz crystal resonator. Discusses several technological approaches including hermetic packaging based on the LTCC substrate, deep reactive ion etching, neutral beam etching technology, and metal-assisted chemical etching, as well as design considerations for mechanically coupled, selective vibration of high-order mode, movable electrode structures, and piezoresistive heat engines were investigated to achieve small motional resistance, low insertion loss, and high quality factor. Focusses on a capacitive sensing method based on the measurement of the change in capacitance between a sensing electrode and the resonant body. Reviews recent progress in performance enhancement methods for capacitive silicon resonator, which are mainly based on the works of the authors.

Download or read book High Frequency Capacitive Single Crystal Silicon Resonators and Coupled Resonator Systems written by Siavash Pourkamali and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the work presented in this thesis is to implement high-Q silicon capacitive micromechanical resonators operating in the HF, VHF and UHF frequency bands. Several variations of a fully silicon-based bulk micromachining fabrication process referred to as HARPSS have been developed, characterized and optimized to overcome most of the challenges facing application of such devices as manufacturable electronic components. Several micromechanical structures for implementation of high performance capacitive silicon resonators covering various frequency ranges have been developed under this work. Design criteria and electromechanical modeling of such devices is presented. Under this work, HF and VHF resonators with quality factors in the tens of thousands and RF-compatible equivalent electrical impedances have been implemented successfully. Resonance frequencies in the GHz range with quality factors of a few thousands and lowest motional impedances reported for capacitive resonators to date have been achieved. Several resonator coupling techniques for implementation of higher order resonant systems with possibility of extension to highly selective bandpass filters have been investigated and practically demonstrated. Finally, a wafer-level vacuum sealing technique applicable to such resonators has been developed and its reliability and hermeticity is characterized.

Download or read book Single crystal Silicon HARPSS Capacitive Beam Resonators written by Akinori Hashimura and published by . This book was released on 2002 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Glass Science and Technology written by Vincenzo Maria Sglavo and published by BoD – Books on Demand. This book was released on 2018-06-06 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, some recent advances in glass science and technology are collected. In the first part, the structure and crystallization of innovative glass compositions are analysed. In the second part, innovative applications are described from the use of glass in optical devices and lasers to fibres in composites, micropatterned components in sensors and microdevices, beads in building walls and sealing in solid oxide fuel cells.

Download or read book Resonant MEMS written by Oliver Brand and published by John Wiley & Sons. This book was released on 2015-04-28 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part of the AMN book series, this book covers the principles, modeling and implementation as well as applications of resonant MEMS from a unified viewpoint. It starts out with the fundamental equations and phenomena that govern the behavior of resonant MEMS and then gives a detailed overview of their implementation in capacitive, piezoelectric, thermal and organic devices, complemented by chapters addressing the packaging of the devices and their stability. The last part of the book is devoted to the cutting-edge applications of resonant MEMS such as inertial, chemical and biosensors, fluid properties sensors, timing devices and energy harvesting systems.

Download or read book Compensation and Trimming for Silicon Micromechanical Resonators and Resonator Arrays for Timing and Spectral Processing written by Ashwin Kumar Samarao and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation reports very novel solutions for the trimming and compensation of various parameters of silicon micromechanical resonators and resonator-arrays. Post-fabrication trimming of resonance frequency to a target value is facilitated by diffusing in a deposited thin metal layer into a Joule-heated silicon resonator. Up to ~400 kHz of trimming-up and trimming-down in a 100 MHz Silicon Bulk Acoustic Resonators (SiBARs) are demonstrated via gold and aluminum diffusion respectively. The dependence of the trimming range on the duration of Joule heating and value of current passed are presented and the possibility of extending the trimming range up to ~4 MHz is demonstrated. Passive temperature compensation techniques are developed to drastically reduce the temperature coefficient of frequency (TCF) of silicon resonators. The dependence of TCF on the charge carriers in silicon are extensively studied and exploited for the very first time to achieve temperature compensation. A charge surplus via degenerate doping using boron and aluminum is shown to reduce a starting TCF of -30 ppm/©3¡2â2́Ơš©30́(©2°C to -1.5 ppm/©3¡2â2́Ơš©30́(©2°C while a charge depletion effected by creating multiple pn-junctions reduces the TCF to -3 ppm/©3¡2â2́Ơš©30́(©2°C. Further, shear acoustic waves in silicon microresonators have also been identified to effect a TCF reduction and have been excited in a concave SiBAR (or CBAR) to exhibit a TCF that is 15 ppm/©3¡2â2́Ơš©30́(©2°C lesser than that of a conventional rectangular SiBAR. The study on quality factor (Q) sensitivity to the various crystallographic axis of transduction in silicon resonators show that the non-repeatability of Q across various fabrication batches are due to the minor angular misalignment of ©3¡2©2℗Ø©3℗Øâ0́(℗Ơ©2°©30́(©2℗Þ 0.5©3¡2â2́Ơš©30́(©2° during the photolithography processes. Preferred axes of transduction for minimal misalignment sensitivity are identified and novel low-loss resonator-array type performances are also reported from a single resonator while transduced along certain specific crystallographic axes. Details are presented on an unprecedented new technique to create and fill charge traps on the silicon resonator which allows the operation of the capacitive SiBARs without the application of any polarization voltages (Vp) for the first time, making them very attractive candidates for ultra-low-power oscillator and sensor applications. Finally, a fabrication process that integrates both the capacitive and piezoelectric actuation/sensing schemes in microresonators is developed and is shown to compensate for the parasitics in capacitive silicon resonators while maintaining their high-Q.

Download or read book Micro Resonators The Quest for Superior Performance written by Reza Abdolvand and published by MDPI. This book was released on 2019-02-15 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Micro-Resonators: The Quest for Superior Performance" that was published in Micromachines

Download or read book Piezoelectric MEMS Resonators written by Harmeet Bhugra and published by Springer. This book was released on 2017-01-09 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces piezoelectric microelectromechanical (pMEMS) resonators to a broad audience by reviewing design techniques including use of finite element modeling, testing and qualification of resonators, and fabrication and large scale manufacturing techniques to help inspire future research and entrepreneurial activities in pMEMS. The authors discuss the most exciting developments in the area of materials and devices for the making of piezoelectric MEMS resonators, and offer direct examples of the technical challenges that need to be overcome in order to commercialize these types of devices. Some of the topics covered include: Widely-used piezoelectric materials, as well as materials in which there is emerging interest Principle of operation and design approaches for the making of flexural, contour-mode, thickness-mode, and shear-mode piezoelectric resonators, and examples of practical implementation of these devices Large scale manufacturing approaches, with a focus on the practical aspects associated with testing and qualification Examples of commercialization paths for piezoelectric MEMS resonators in the timing and the filter markets ...and more! The authors present industry and academic perspectives, making this book ideal for engineers, graduate students, and researchers.

Download or read book Microelectronics to Nanoelectronics written by Anupama B. Kaul and published by CRC Press. This book was released on 2017-12-19 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composed of contributions from top experts, Microelectronics to Nanoelectronics: Materials, Devices and Manufacturability offers a detailed overview of important recent scientific and technological developments in the rapidly evolving nanoelectronics arena. Under the editorial guidance and technical expertise of noted materials scientist Anupama B. Kaul of California Institute of Technology’s Jet Propulsion Lab, this book captures the ascent of microelectronics into the nanoscale realm. It addresses a wide variety of important scientific and technological issues in nanoelectronics research and development. The book also showcases some key application areas of micro-electro-mechanical-systems (MEMS) that have reached the commercial realm. Capitalizing on Dr. Kaul’s considerable technical experience with micro- and nanotechnologies and her extensive research in prestigious academic and industrial labs, the book offers a fresh perspective on application-driven research in micro- and nanoelectronics, including MEMS. Chapters explore how rapid developments in this area are transitioning from the lab to the market, where new and exciting materials, devices, and manufacturing technologies are revolutionizing the electronics industry. Although many micro- and nanotechnologies still face major scientific and technological challenges and remain within the realm of academic research labs, rapid advances in this area have led to the recent emergence of new applications and markets. This handbook encapsulates that exciting recent progress by providing high-quality content contributed by international experts from academia, leading industrial institutions—such as Hewlett-Packard—and government laboratories including the U.S. Department of Energy’s Sandia National Laboratory. Offering something for everyone, from students to scientists to entrepreneurs, this book showcases the broad spectrum of cutting-edge technologies that show significant promise for electronics and related applications in which nanotechnology plays a key role.

Download or read book 17th IEEE International Conference on Micro Electro Mechanical Systems written by and published by Institute of Electrical & Electronics Engineers(IEEE). This book was released on 2004 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Micromachined Circuits and Devices written by Shiban Kishen Koul and published by Springer Nature. This book was released on 2022-02-07 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the design of different switching and resonant devices using the present state-of-the-art radio frequency (RF) micromachining (MEMS) technology. Different topologies of MEMS switches have been discussed considering optimum performances over microwave to millimeter wave frequency range. Wide varieties of micromachined switching networks starting from single-pole-double-throw (SPDT) to single-pole-fourteen-throw (SP14T) are discussed utilizing vertical and lateral actuation movements of the switch. Different transduction mechanisms of micromachined resonators are highlighted that includes capacitive, piezoelectric, and piezoresistive types. The book provides major design guidelines for the development of MEMS-based digital phase shifters, tunable filters, and antennas with extensive measurement data. Apart from the radio frequency (RF) requirements, an extensive guideline is given for the improvement of the reliability of micromachined switches and digital phase shifters where multiple switches are operating simultaneously. It takes multiple iterations and extensive characterizations to conclude with a reliable MEMS digital phase shifter, and these aspects are given one of the prime attentions in this book. Detailed performance analysis of metamaterial inspired MEMS switches is then discussed for application in millimeter wave frequency bands up to about 170 GHz. The book concludes with future research activities of RF MEMS technology and its potential in space, defense, sensors, and biomedical applications.

Download or read book Technical Digest written by and published by . This book was released on 2003 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solid State Microelectromechanical Systems Resonators in Silicon written by and published by . This book was released on 2015 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two of the greatest challenges in MEMS are those of packaging and integration with CMOS technology. Development of solid state RF MEMS resonators in silicon, resonators that do not require any release etch step, eliminates the necessity for complex encapsulation methods and costly packaging. Such solid state solution could also enable direct integration into front-end-of-line (FEOL) processing in CMOS, making these devices an attractive choice for on-chip signal generation and signal processing. This thesis discusses the physics, design considerations, and process developments to build such solid state MEMS resonators in silicon, showing a series of incremental stages of the prototyping of such devices. The major challenge of building solid state MEMS resonators lies in maintaining comparable device performance relative to released ones, especially quality factor Q. Energy localization structures, such as acoustic Bragg reflectors (ABRs) are implemented for such solid state resonators to maintain high Q and suppress spurious modes. Towards the goal of high aspectratio structures that have the capability of direct CMOS integration, deep trench (DT) capacitor based MEMS resonators are studied and demonstrated. This concept enables high Q, low loss multi-GHz resonators in a simple, robust manufacturing process.

Download or read book Micro and Nano Fabrication by Metal Assisted Chemical Etching written by Lucia Romano and published by MDPI. This book was released on 2021-01-13 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal-assisted chemical etching (MacEtch) has recently emerged as a new etching technique capable of fabricating high aspect ratio nano- and microstructures in a few semiconductors substrates—Si, Ge, poly-Si, GaAs, and SiC—and using different catalysts—Ag, Au, Pt, Pd, Cu, Ni, and Rh. Several shapes have been demonstrated with a high anisotropy and feature size in the nanoscale—nanoporous films, nanowires, 3D objects, and trenches, which are useful components of photonic devices, microfluidic devices, bio-medical devices, batteries, Vias, MEMS, X-ray optics, etc. With no limitations of large-areas and low-cost processing, MacEtch can open up new opportunities for several applications where high precision nano- and microfabrication is required. This can make semiconductor manufacturing more accessible to researchers in various fields, and accelerate innovation in electronics, bio-medical engineering, energy, and photonics. Accordingly, this Special Issue seeks to showcase research papers, short communications, and review articles that focus on novel methodological developments in MacEtch, and its use for various applications.

Download or read book Transducers 01 Eurosensors XV written by Ernst Obermeier and published by Springer. This book was released on 2016-05-12 with total page 1763 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Conference is the premier international meeting for the presentation of original work addressing all aspects of the theory, design, fabrication, assembly, packaging, testing and application of solid-state sensors, actuators, MEMS, and microsystems.

Download or read book Enabling Technology for MEMS and Nanodevices written by Henry Baltes and published by John Wiley & Sons. This book was released on 2013-03-27 with total page 441 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mikro- und Nanotechnik haben Wissenschaft und Forschung revolutioniert. In Zukunft werden sie auch den Alltag verändern. Nun liegt der erste Band einer neuen Buchreihe vor: Advanced Micro and Nano Systems 1. Henry Baltes und seine Co-Autoren knüpfen mit AMN an die Sensors Update-Reihe an. Das Autorenteam wurde um weitere Experten erweitert. AMN wird zwei Mal pro Jahr mit einem neuen Band die aktuellen Entwicklungen in der Mikro- und Nano-Welt begleiten. Die Erforschung und der Einsatz von Mikro- und Nanosystemen sind eines der brandaktuellen Themen im Wissenschaftsbereich. Die Forschungsergebnisse werden mehr und mehr auch konkret umgesetzt. Damit werden Mikro- und Nanotechnologie zu Wirtschaftsfaktoren. Aktuelle Entwicklungen, neue Technologien, Nano-Bauelemente und Systeme im Mikromaßstab - Advanced Micro and Nano Systems, die neue Buchreihe, wird Spiegel der spannenden und faszinierenden Mikro- und Nano-Welt sein. Zweimal pro Jahr wird es einen neuen AMN-Band geben. Die Autoren sind ausgewiesene Spezialisten. Zu den Herausgebern zählt Henry Baltes, Professor an der ETH Zürich. Er zeichnete bereits für die Bände der Sensors Update-Reihe verantwortlich. Die Artikel ermöglichen Neueinsteigern einen ersten Zugriff auf die Materie. Fachleute erhalten einen umfassenden Überblick. Anspruch der Herausgeber ist es, nicht nur die theoretischen Grundlagen von Mikro- und Nanosystemen zu reflektieren, sondern immer auch praktische Möglichkeiten und die Grenzen der Anwendung im Blick zu haben. Die AMN-Bände sind Handbücher und Nachschlagewerke in einem. Die Reihe richtet sich an Vertreter unterschiedlicher Fachrichtungen: Biologie, Chemie, Mathematik, Sensorindustrie und Materialwissenschaften.