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David W Parent

Bio: David W Parent is an academic researcher from San Jose State University. The author has contributed to research in topics: Transistor & Metalorganic vapour phase epitaxy. The author has an hindex of 8, co-authored 53 publications receiving 299 citations. Previous affiliations of David W Parent include University of California, Santa Cruz & University of Connecticut.


Papers
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Proceedings ArticleDOI
11 Nov 2010
TL;DR: Preliminary results showed that the ionic species did not alter the electrical characteristics and the relative effective dielectric constant of the hafnium oxide layer and SiO2 interfacial layer was 10.5.
Abstract: A process for fabricating hafnium oxide (HfO) films to minimize ionic penetration was developed and tested. A 333A HfO film was successfully deposited by thermal evaporation. The film was characterized through capacitance versus time (C-T) and capacitance versus voltage (C-V) measurements. The films were exposed to a solution of 0.1M NaCl physiological saline and preliminary results showed that the ionic species did not alter the electrical characteristics. The relative effective dielectric constant of the hafnium oxide layer and SiO 2 interfacial layer was 10.5, while the relative dielectric constant of the hafnium oxide layer was 18.

1 citations

01 Jan 2007
TL;DR: In this paper, the authors present the implementation and outcomes of a hands-on laboratory course in microelectromechanical systems (MEMS), co-developed by a multidisciplinary team of faculty from mechanical engineering, electrical engineering and materials engineering.
Abstract: This paper presents the implementation and outcomes of a hands-on laboratory course in microelectromechanical systems (MEMS), co-developed by a multidisciplinary team of faculty from mechanical engineering, electrical engineering, and materials engineering. Central to the design of the course is an emphasis on implementing modules that are able to overcome critical barriers related to (1) diverse academic background from different majors and (2) practical limitations in microfabrication facilities. These points are vital for promoting MEMS education, because they expand the student pool and reach audiences that need a cost-effective way to support instructional laboratory experiences in MEMS without the broader infrastructure that is often limited only to large research institutions. Laboratory projects emphasize skills in design, fabrication, and testing, while a classroom lecture portion of the course provides corresponding background theory. The paper provides technical description of three modular projects that have been implemented in the course. These encompass a variety of MEMS fabrication approaches, including surface micromachining, bulk micromachining, and soft lithography. These distinct methods are exercised in three corresponding devices: a silicon pressure sensor, an aluminum suspended beam, and a polymer microfluidic chip. These projects illustrate principles and reinforce student learning of important phenomena commonly involved in MEMS, such as piezoresistivity, electrostatics, stiction, residual stress, and electrokinetics. The modules are arranged with different levels of emphasis among design, fabrication, and testing, to reach higher levels of Bloom’s Taxonomy while simultaneously balancing time and resource constraints in a practical manner. Feedback from student opinions and plans for improvement are also presented.
Proceedings ArticleDOI
08 Oct 2022
TL;DR: In this paper , a remote testing protocol based on Cognitive Load Theory and the Theory of Situated Cognition is described, which reduces students' cognitive overload during online exams by addressing student privacy, unreliable internet connections, accessible accommodations, all-or-nothing automatic grading, and false accusations of plagiarism.
Abstract: In this work, which is intended to be a Work in Progress Paper in the Research to Practice Category, a novel remote testing protocol based on Cognitive Load Theory and the Theory of Situated Cognition is described. The proposed protocol reduced students’ cognitive overload during online exams by addressing student privacy, unreliable internet connections, accessible accommodations, all-or-nothing automatic grading, and false accusations of plagiarism. The described protocol relies on finite exam times and a sophisticated question randomization system. The protocol has been used successfully for five semesters, for two courses (20 sections).
Proceedings ArticleDOI
25 Jun 2006
TL;DR: In this article, a simplified 2-mask n-type metal oxide semiconductor (NMOS) transistor process design and verification module was developed for electrical engineering students enrolled in the Microelectronic Manufacturing Methods class/laboratory at San Jose State University.
Abstract: We have developed a simplified 2-mask n-type metal oxide semiconductor (NMOS) transistor process design and verification module for electrical engineering students enrolled in the Microelectronic Manufacturing Methods class/laboratory at San Jose State University. We have run this module for three years and have found that the simplified process allows the students to learn more because they have the time to design the process fabricate and test in one semester. Student learning is also enhanced because it allows students to make and correct mistakes in the processing the devices. We have also found that the simplified process saves time in process development of more complex processes, by reducing the number of photolithography steps required to fabricate a transistor.

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Journal Article
TL;DR: This book by a teacher of statistics (as well as a consultant for "experimenters") is a comprehensive study of the philosophical background for the statistical design of experiment.
Abstract: THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

13,333 citations

Posted Content
TL;DR: An exhaustive review of the research conducted in neuromorphic computing since the inception of the term is provided to motivate further work by illuminating gaps in the field where new research is needed.
Abstract: Neuromorphic computing has come to refer to a variety of brain-inspired computers, devices, and models that contrast the pervasive von Neumann computer architecture This biologically inspired approach has created highly connected synthetic neurons and synapses that can be used to model neuroscience theories as well as solve challenging machine learning problems The promise of the technology is to create a brain-like ability to learn and adapt, but the technical challenges are significant, starting with an accurate neuroscience model of how the brain works, to finding materials and engineering breakthroughs to build devices to support these models, to creating a programming framework so the systems can learn, to creating applications with brain-like capabilities In this work, we provide a comprehensive survey of the research and motivations for neuromorphic computing over its history We begin with a 35-year review of the motivations and drivers of neuromorphic computing, then look at the major research areas of the field, which we define as neuro-inspired models, algorithms and learning approaches, hardware and devices, supporting systems, and finally applications We conclude with a broad discussion on the major research topics that need to be addressed in the coming years to see the promise of neuromorphic computing fulfilled The goals of this work are to provide an exhaustive review of the research conducted in neuromorphic computing since the inception of the term, and to motivate further work by illuminating gaps in the field where new research is needed

570 citations

Patent
17 May 2006
TL;DR: In this paper, the fabrication of monolithic lattice-mismatched semiconductor heterostructures with limited area regions having upper portions substantially exhausted of threading dislocations is discussed.
Abstract: Fabrication of monolithic lattice-mismatched semiconductor heterostructures with limited area regions having upper portions substantially exhausted of threading dislocations, as well as fabrication of semiconductor devices based on such lattice-mismatched heterostructures.

326 citations

Journal Article

277 citations

Journal ArticleDOI
TL;DR: In this article, a defect-free germanium was demonstrated in SiO2 trenches on silicon via aspect ratio trapping, whereby defects arising from lattice mismatch are trapped by laterally confining sidewalls.
Abstract: Defect-free germanium has been demonstrated in SiO2 trenches on silicon via Aspect Ratio Trapping, whereby defects arising from lattice mismatch are trapped by laterally confining sidewalls. Results were achieved through a combination of conventional photolithography, reactive ion etching of SiO2, and selective growth of Ge as thin as 450nm. Full trapping of dislocations originating at the Ge∕Si interface has been demonstrated for trenches up to 400nm wide without the additional formation of defects at the sidewalls. This approach shows great promise for the integration of Ge and/or III-V materials, sufficiently large for key device applications, onto silicon substrates.

228 citations