Effect of Disorder and Defects in Ion-Implanted Semiconductors: Optical and Photothermal Characterization SEMICONDUCTORS AND SEMIMETALS Volume 46 Semiconductors and Semimetals A Treatise Edited by R. K. Willardson Eicke R. Weber CONSULTING PHYSICIST DEPARTMEOFN MTA TERIALSSC IENCE SPOKANEW, ASHINGTON AND MINERAELNG INEERING UNIVERSIOTFY C ALIFORNAITA BERKELEY In memory of Dr. Albert C. Beer, Founding Co-Editor in 1966 and Editor Emeritus of Semiconductors and Semimetals. Died January 19, 1997, Columbus, OH. Effect of Disorder and Defects in Ion-Implanted Semiconductors: Optical and Photothermal Characterization SEMICONDUCTORS AND SEMIMETALS Volume 46 Volume Editors CONSTANTINOS CHRISTOFIDES DEPARTMENT OF NATURAL SCIENCES UNIVERSITY OF CYPRUS NICOSIA, CYPRUS GERARD GHIBAUDO LABORATOIRE DE PHYSIQUE DES COMPOSANTS A SEMICONDUCTEURS ENSERG GRENOBLE, FRANCE ACADEMIC PRESS San Diego London Boston New York Sydney Tokyo Toronto This book is printed on acid-free paper. @ COPYRIGHT 0 1997 BY ACADEMICP RESS ALL RIGHTS RESERVED. NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS, ELECTRONIC OR MECHANICAL, INCLUDING PHOTOCOPY, RECORDING, OR ANY INFORMATION STORAGE AND RETRIEVAL SYSTEM, WITHOUT PERMISSION IN WRITING FROM THE PUBLISHER. 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Chestnut Hill. Massachusetts 02167. USA http://w&w.apnet.com ACADEMIC PRESS LIMITED 24-28 Oval Road, London NWI 7DX. UK htlp://www.hbuk.co.uk/ap/ International Standard Book Number: 0-12-752146-1 Printed in the United States of America 97 98 99 00 01 BB 9 8 7 6 5 4 3 2 1 Dedicated to our parents, Anthoula, Christos, Jeanne, and Jean TThhiiss PPaaggee IInntteennttiioonnaallllyy LLeefftt BBllaannkk Contents LISTO F CONTRIBUTOR.S . . . . . . . . . . . . . . . . . . . . . . xi ... FOREWOR.D. . . . . . . . . . . . . . . . . . . . . . . . . . . Xlll Chapter 1 Ellipsometric Analysis M . Fried. T. Lohner and J . Gyulai I . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 I1. Principle of Ellipsometry . . . . . . . . . . . . . . . . . . . . . . . . 3 111. General Remarks . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 IV. Optical Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V . The Complex Dielectric Function . . . . . . . . . . . . . . . . . . . . 9 VJ. Light Penetration . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 VII . Effective Medium Theory . . . . . . . . . . . . . . . . . . . . . . . . 13 VIII . Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 I . Gallium Arsenide . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2 .Germanium . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3. Indium Phosphide . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.Silicon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 5 . Silicon-on-Insulator (SOI) Structures . . . . . . . . . . . . . . . . . 24 6 . Separation by IMplantation of Oxygen (SIMOX) . . . . . . . . . . . . 26 7 . Separation by IMpiantation of Nitrogen (SIMNI) . . . . . . . . . . . 27 IX . Sophisticated Multilayer Optical Models . . . . . . . . . . . . . . . . . 27 1. Profiles with Unknown Depth Variation . . . . . . . . . . . . . . . . 29 2. Profiles with Known Depth Variation . . . . . . . . . . . . . . . . . 31 X . Closing Remarks . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 vii viii CONTENTS Chapter 2 Transmission and Reflection Spectroscopy on Ion Implanted Semiconductors Antonios Seas and Constantinos Christofides I . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 I1 . General Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 111. Recent Optical Experimental Studies on Implanted Silicon . . . . . . . . . 47 1. Phosphorous-Implanted Silicon . . . . . . . . . . . . . . . . . . . . 47 2. Fourier Transform Infrared Optical Measurements . . . . . . . . . . . 49 IV. Theoretic Background . . . . . . . . . . . . . . . . . . . . . . . . . 60 V . Discussion and Analysis . . . . . . . . . . . . . . . . . . . . . . . . 62 1. Influence of Annealing Temperature on the Plasma Wavelength . . . . . . 62 2. Effective Mass vs . Annealing Temperature . . . . . . . . . . . . . . . 61 VI . Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 Chapter 3 Photoluminescence and Raman Scattering of Ion . Implanted Semiconductors Influence of Annealing Andreas Othonos and Constantinos Christofides I . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 I1. Photoluminescence and Raman Scattering Theory . . . . . . . . . . . . . 74 1. Photoluminescence Theory . . . . . . . . . . . . . . . . . . . . . . 74 2. Raman Scattering Theory . . . . . . . . . . . . . . . . . . . . . . 77 I11 . Photoluminescence and Raman Scattering Techniques . . . . . . . . . . . 79 1. Common Photoluminescence Techniques . . . . . . . . . . . . . . . . 79 2. Raman Scattering Techniques . . . . . . . . . . . . . . . . . . . . . 80 3 . Time-Resolved Measurements . . . . . . . . . . . . . . . . . . . . 82 1V . Characterization of Ion-Implanted Semiconductors . . . . . . . . . . . . . 84 1. Photoluminescence Experimental Studies . . . . . . . . . . . . . . . . 84 2. Raman Studies on Ion-Implanted Semiconductors . . . . . . . . . . . . 97 V . Summary and Future Perspectives . . . . . . . . . . . . . . . . . . . . 111 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 Chapter 4 Photomodulated Thermoreflectance Investigation of . Implanted Wafers Annealing Kinetics of Defects Constant inos Christofides I . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 I1 . Photomodulated Thermoreflectance Theory . . . . . . . . . . . . . . . . 116 1. Basic Photothermal Equations . . . . . . . . . . . . . . . . . . . . 116 2. Three-Dimensional Diffusion . . . . . . . . . . . . . . . . . . . . . 118 III. Experimental Methodology . . . . . . . . . . . . . . . . . . . . . . . 119 1. Room Temperature Measurements . . . . . . . . . . . . . . . . . . 119 2. Measurements versus Temperature . . . . . . . . . . . . . . . . . . 121 IV. Experimental Results and Discussion . . . . . . . . . . . . . . . . . . . 122 1. Characterization of Implanted Wafers . . . . . . . . . . . . . . . . . 122 2 . Influence of Annealing . . . . . . . . . . . . . . . . . . . . . . . . 126 CONTENTS ix 3. Temperature Influence on the Photothermal Signal . . . . . . . . . . . 136 V . Recent Developments . . . . . . . . . . . . . . . . . . . . . . . . . 144 1. Single-Beam Thermowave Technique . . . . . . . . . . . . . . . . . 144 2 . Extension to Two-Layer Model . . . . . . . . . . . . . . . . . . . . 145 VI . Summary and Future Perspectives . . . . . . . . . . . . . . . . . . . . 146 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147 Chapter 5 Photothermal Deflection Spectroscopy Characterization of Ion-Implanted and Annealed Silicon Films U. Zammit 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151 II. Theory and Experiment . . . . . . . . . . . . . . . . . . . . . . . . 154 I11. Results and Discussion . . . . . . . . . . . . . . . . . . . . . . . . . 158 1. The Effect of Implantation Dose . . . . . . . . . . . . . . . . . . . 158 2. Effects of Annealing of Damaged Crystalline Material . . . . . . . . . . 166 3. Effects of Annealing of Amorphous Material . . . . . . . . . . . . . . 167 1V . Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174 Chapter 6 Photothermal Deep-Level Transient Spectroscopy of Impurities and Defects in Semiconductors Andreas Mandeiis. Arief Budiman and Miguei Vargas I . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179 I1. Physical Foundations of Photothermal Radiometric Deep-Level TransientSpectroscopy . . . . . . . . . . . . . . . . . . . . . . . . . 181 111. Theory of Photothermal Radiometric Deep-Level Transient Spectroscopy . . . 184 IV . Instrumental Foundations of Photothermal Radiometric Deep-Level Transient Spectroscopy: The Lock-In Rate-Window Method . . . 188 V . Experiment and Discussion . . . . . . . . . . . . . . . . . . . . . . . 190 1. Constant-Temperature Photothermal Radiometric Deep-Level Transient Spectroscopy of Silicon . . . . . . . . . . . . . . . . . . . 191 2. Constant Duty-Cycle Photothermal Radiometric Deep-Level Transient Spectroscopy of Semi-Insulating-Gallium Arsenide . . . . . . . . . . . 198 VI. Potential for Ion-Implantation Diagnostics and Conclusions . . . . . . . . 207 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209 Chapter 7 Ion Implantation into Quantum-Well Structures R . Kalish and S. Charbonneau I . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213 II . General Background . . . . . . . . . . . . . . . . . . . . . . . . . 216 1. Ion-Implantation-Related Damage . . . . . . . . . . . . . . . . . 217 2 . Annealing Ion-Implantation-Related Damage . . . . . . . . . . . . . 220 3. Evaluation of Structural Modifications . . . . . . . . . . . . . . . . 221 4 . Evaluation by Optical Techniques . . . . . . . . . . . . . . . . . . 224 I11 . Ion-Beam-Induced Modifications of QW Structures . . . . . . . . . . . 230
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