Fabrication And Characterization Of Modulation Doped Field Effect Transistors For Quantum Waveguide Structures

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Fabrication And Characterization Of Modulation Doped Field Effect Transistors For Quantum Waveguide Structures

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Author : Wipawan Yindeepol
language : en
Publisher:
Release Date : 1990

Fabrication And Characterization Of Modulation Doped Field Effect Transistors For Quantum Waveguide Structures written by Wipawan Yindeepol and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Modulation-doped field-effect transistors categories.

Split and normal gate A1GaAs /GaAs MODFETs were fabricated along with the ohmic test structures and the Hall bar geometries. The DC characteristics of normal gate transistors were evaluated at room temperature and at 77K and the threshold voltages were extracted from the measurements and compared to the theoretical results. The performance of normal gate transistors was reasonable. The sheet carrier density and the mobility extracted from Hall measurements using the Hall bar geometry showed increase of carrier density with increasing gate voltage and an increase of mobility with increasing carrier density. The contact resistance obtained from the ohmic test structure was high and not uniform within the sample.

Masters Theses In The Pure And Applied Sciences

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Author : Wade H. Shafer
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Masters Theses In The Pure And Applied Sciences written by Wade H. Shafer and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.

Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1 957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 36 (thesis year 1991) a total of 11,024 thesis titles from 23 Canadian and 161 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 36 reports theses submitted in 1991, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.

Circular

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Author :
language : en
Publisher:
Release Date : 1989

Circular written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Engineering categories.

Masters Theses In The Pure And Applied Sciences

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Author : W. H. Shafer
language : en
Publisher: Springer Science & Business Media
Release Date : 1993

Masters Theses In The Pure And Applied Sciences written by W. H. Shafer and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Education categories.

Volume 36 reports (for thesis year 1991) a total of 11,024 thesis titles from 23 Canadian and 161 US universities. The organization of the volume, as in past years, consists of thesis titles arranged by discipline, and by university within each discipline. The titles are contributed by any and all a

Jjap

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Author :
language : en
Publisher:
Release Date : 1999

Jjap written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Engineering categories.

Journal Of The Physical Society Of Japan

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Author :
language : en
Publisher:
Release Date : 2002

Journal Of The Physical Society Of Japan written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Physics categories.

Nanostructure Engineering Using Electron Beam Lithography

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Author : Paul Bernard Fischer
language : en
Publisher:
Release Date : 1993

Nanostructure Engineering Using Electron Beam Lithography written by Paul Bernard Fischer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.

This Ph. D. thesis addresses nanostructure fabrication techniques based on electron beam lithography and their application to: the creation of ultra-fast metal-semiconductor-metal photodetectors and quantum effect transistors, the investigation of light emission from silicon, and the enhancement of resolution in magnetic force microscopy. Specifically, this thesis covers the following topics. (1) The implementation and characterization of an ultra-high resolution electron beam lithography (EBL) system created by modifying a scanning electron microscope. (2) The exploration of minimum achievable feature sizes using ultra-high resolution EBL and a lift-off process with polymethyl-methacrylate resists. 10 nm features, which are among the smallest ever achieved using EBL, have been obtained using a double shadow evaporation technique, a ultra-high resolution EBL technique, and a technique utilizing EBL, reactive ion etching, and subsequent wet etching. (3) The application of ultra-high resolution EBL technology to the fabrication of ultra-fast metal-semiconductor-metal (MSM) photodetectors. The fastest response time reported to date has been achieved in this project. (4) The fabrication and characterization of modulation doped field effect transistors. Quantum effects have been observed in a point contact device. (5) The fabrication of sub-50 nm Si structures using EBL, reactive ion etching (RIE) and subsequent wet etching for the study of photoluminescence (PL) from Si. PL has been observed from an array of 20 nm diameter pillars. And finally, (6) the application of high resolution EBL to the study of magnetic materials. Single domain magnetic particles and novel MFM tips have been fabricated.

Japanese Journal Of Applied Physics

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Author :
language : en
Publisher:
Release Date : 2002

Japanese Journal Of Applied Physics written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Engineering categories.

Fabrication Of Algaas Ingaas Pseudomorphic Modulation Doped Field Effect Transistors With P Doped Surface Layers

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Author : Thomas E. McLaughlin
language : en
Publisher:
Release Date : 1986

Fabrication Of Algaas Ingaas Pseudomorphic Modulation Doped Field Effect Transistors With P Doped Surface Layers written by Thomas E. McLaughlin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.

In this thesis modulation doped field-effect transistors (MODFETs) were fabricated. Two recently developed improvements to the MODFET structure were incorporated to produce an electronic device that had never before been fabricated. Highly p-doped surface layers were incorporated under the gate contact of the device. These layers have been shown to increase the Schottky barrier height at the MODFETs. Pseudomorphic AlGaAs/InGaAs technology was also incorporated for its proven unsurpassed electron saturation velocity and resulting high speed of operation. To evaluate the response of these ES pseudomorphic devices, their characteristics were measured and compared directly with those of reference samples fabricated at the reference transistors were etched off chemically just before deposition of gate contact metal. The peak transconductance, threshold voltage, contact resistance and barrier height of all devices were measured at direct current (DC). Also, microwave S-parameters were measured over the range of 2 to 12 gigahertz (GHz).

Scientific And Technical Aerospace Reports

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Author :
language : en
Publisher:
Release Date : 1994

Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aeronautics categories.

Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.