Lithography Edited by Michael Wang Intech IV Published by Intech Intech Olajnica 19/2, 32000 Vukovar, Croatia Abstracting and non-profit use of the material is permitted with credit to the source. Statements and opinions expressed in the chapters are these of the individual contributors and not necessarily those of the editors or publisher. No responsibility is accepted for the accuracy of information contained in the published articles. Publisher assumes no responsibility liability for any damage or injury to persons or property arising out of the use of any materials, instructions, methods or ideas contained inside. After this work has been published by the Intech, authors have the right to republish it, in whole or part, in any publication of which they are an author or editor, and the make other personal use of the work. © 2010 Intech Free online edition of this book you can find under www.sciyo.com Additional copies can be obtained from: [email protected] First published February 2010 Printed in India Technical Editor: Teodora Smiljanic Cover designed by Dino Smrekar Lithography, Edited by Michael Wang p. cm. ISBN 978-953-307-064-3 Preface Lithography, the fundamental fabrication process of semiconductor devices, is playing a critical role in micro- and nano-fabrications and the revolution in high density integrated circuits. Traditional optical lithography (photolithography) including contact and project photolithography has contributed significantly to the semiconductor device advancements. As the resolution requirement increases for fabrication of finer and smaller components and devices, the technological dependence on photolithography becomes a serious problem since the photolithography resolution is restricted by the diffraction limitation of optics. Reducing the light wavelength from blue to near ultraviolet (UV) and to deep UV is expected to improve the photolithography resolution, but it is far not enough to catch up with the pace in resolution demand in integrated circuit fabrication. To overcome the limitation of photolithography, several advanced lithography techniques have emerged including maskless laser direct write lithography to eliminate the needs of photo masks, gray-scale lithography to increase the aspect ratio of the lithographic features, immersion lithography to increase the numerical aperture of the focusing optics and thus the resolution, and lithographic techniques based on further reducing wavelengths for better resolution such as extreme ultraviolet (EUV) lithography and X-ray lithography. The uses of particle waves like electrons and ion beams have resulted in high resolution electron beam (E-beam) lithography and ion beam lithography. Besides these wave and beam based lithographic techniques, there are also direct contact lithography such as soft lithography using soft molding and nanoimprint lithography with extremely high resolution. The plasmonic lithography is now in the horizon. This book is the result of inspirations and contributions from many researchers worldwide. Although the inclusion of the book chapters may not be a complete representation of all lithographic arts, it does represent a good collection of contributions in this field. We hope readers will enjoy reading the book as much as we have enjoyed bringing the book together. We would like to thank all contributors and authors of book chapters who entrusted us with their best work. We also acknowledge the great effort of people who had invested their time in reviewing manuscripts and revision updates. Each lithographic technique has its advantages and limitations. The conventional photolithography is not discussed here due to its technological maturity. This book begins with maskless, gray-scale, and immersion lithography since they are most close to the conventional photolithography in terms of resolution. Laser nonlinear lithography with capability of non-flat surface fabrication and character projection lithography are also included in this chapter. Further chapters present discussion on objective lens, resist materials and processing, and optical proximity correction. VI Part II collects a number of development efforts related to EUV and X-ray lithography. Because of the use of extreme UV light beam of short wavelength, the lithographic resolution is greatly enhanced. The selected chapters discuss EUV light sources, mirrors, and plasma modeling, followed by a chapter discussing X-ray lithography. Part III of the book is devoted to E-beam lithography which is widely used for high resolution patterning. Because of very short electron particle wavelength, the E-beam lithography is one of the most attractive lithographic techniques at this time. Its resolution limitation comes from unwanted E-beam resist exposure by electron scattering. Great discussions have been presented in this part of the book including design, exposure control, and nano-scale fabrication. Simulations on E-beam lithography and ion beam lithography are also presented. Apart from above wave and beam lithography, contact lithography is promising for large area fast patterning of fine features. One of the representing lithographic techniques is the soft lithography. It uses a soft mold to reproduce needed features through the techniques of replica molding, micromolding in capillaries, microcontact printing, microtransfer molding, and microfluidic fabrication. This part IV collects chapters related to micro optical device fabrication, SiC microstructure fabrication, and soft lithography for single-object level study of cells and molecules. Because of appearing nano scale resolution, nanoimprint lithography as a kind of contact lithography has attracted a great deal of attention in recent years. This part V is devoted to the nanoimprint lithography. The selected chapters discuss nanoimprint lithography techniques including hot embossing, UV-nanoimprint lithography, and micro contact printing. The effect of ultrasonic vibration and molecular dynamics are also discussed. There are further discussions on three-dimensional patterning and various applications. Other emerging lithographic technologies are collected in Chapter VI including plasmonic lithography, nanosphere lithography, self assembly of nanoparticles, and high resolution polymer patterning. Editor Michael Wang University of Miami U.S.A. Contents Preface V I Advanced Photolithography 1. Direct Laser Lithography and Its Applications 001 Hyug-Gyo Rhee 2. High Aspect Ratio Sloping and Curved Structures Fabricated 017 by Proximity and UV-LED Backside Exposure Yoshinonori Matsumoto 3. Influence of Immersion Lithography on Wafer Edge Defectivity 033 K. Jami, I. Pollentier, S. Vedula and G. Blumenstock 4. Femtosecond Laser Nonlinear Lithography 041 Hiroaki Nishiyama and Yoshinori Hirata 5. Improving the Efficiency of Pattern Extraction 057 for Character Projection Lithography using OPC Optimization Hirokazu Nosato, Hidenori Sakanashi, Masahiro Murakawa and Tetsuya Higuchi 6. Manufacturing and Investigating Objective Lens 071 for Ultrahigh Resolution Lithography Facilities N.I. Chkhalo, A.E. Pestov, N.N. Salashchenko and M.N. Toropov 7. Advances in Resist Materials and Processing Technology: 115 Photonic Devices Fabricated by Direct Lithography of Resist/Colloidal Nanocrystals Blend Antonio Qualtieri, Tiziana Stomeo, Luigi Martiradonna, Roberto Cingolani and Massimo De Vittorio 8. A Method for Optical Proximity Correction of Thermal Processes: 131 Orthogonal Functional Method Sang-Kon Kim VIII II EUV and X-Ray Lithography 9. CO Laser Produced Tin Plasma Light Source 161 2 as the Solution for EUV Lithography Akira Endo 10. Grazing Incidence Mirrors for EUV Lithography 177 Mariana Braic, Mihai Balaceanu and Viorel Braic 11. Steady-state and Time-dependent LPP Modeling 201 White, Dunne, and O’Sullivan 12. Nano-crystalline Diamond Films for X-ray Lithography Mask 227 Linjun Wang, Jian Huang, Ke Tang and Yiben Xia III E-Beam and Ion Beam Lithography 13. High-energy Electron Beam Lithography 241 for Nanoscale Fabrication Cen Shawn Wu, Yoshiyuki Makiuchi and ChiiDong Chen 14. Optimal Design and Fabrication of Fine Diffractive 267 Optical Elements Using Proximity Correction with Electron-beam Lithography Masato Okano 15. Independent-exposure Method in Electron-beam Lithography 279 Do-Kyun Woo and Sun-Kyu Lee 16. The Interdependence of Exposure and Development Conditions 293 when Optimizing Low-Energy EBL for Nano-Scale Resolution Mohammad A. Mohammad, Taras Fito, Jiang Chen, Steven Buswell, Mirwais Aktary, Steven K. Dew and Maria Stepanova 17. Computer Simulation of Processes at Electron and Ion Beam 319 Lithography, Part 1: Exposure Modeling at Electron and Ion Beam Lithography Katia Vutova and Georgi Mladenov 18. Computer Simulation of Processes at Electron and Ion Beam 351 Lithography, Part 2: Simulation of Resist Developed Images at Electron and Ion Beam Lithography Katia Vutova, Elena Koleva and Georgy Mladenov IX IV Soft Lithography 19. Soft Lithographic Fabrication of Micro Optic and Guided Wave Devices 379 Angel Flores and Michael R. Wang 20. Application of Soft Lithography for Nano Functional Devices 403 Shin-Won Kang 21. Fabrication of SiC-based Ceramic Microstructures from Preceramic 427 Polymers with Sacrificial Templates and Softlithography Techniques Tae-Ho Yoon, Lan-Young Hong and Dong-Pyo Kim 22. Soft Lithography, a Tool to Address Single-Objects Investigations 447 Aline Cerf and Christophe Vieu V Nanoimprint Lithography 23. Nanoimprint Lithography 457 Hongbo Lan and Yucheng Ding 24. Nanoimprint Lithography 495 Thomas Glinsner and Gerald Kreindl 25. Effect of Applying Ultrasonic Vibration 517 in Hot Embossing and Nanoimprint Harutaka Mekaru 26. Molecular Dynamics Study on Mold and Pattern Breakages 543 in Nanoimprint Lithography Masaaki Yasuda, Kazuhiro Tada and Yoshihiko Hirai 27. Three Dimensional Nanoimprint Lithography 557 using Inorganic Electron Beam Resist Jun Taniguchi and Noriyuki Unno 28. Three-Dimensional Patterning 571 using Ultraviolet Nanoimprint Lithography Maan M. Alkaisi and Khairudin Mohamed VI Plasmonic Lithography and Nano Patterning 29. Metal Particle-Surface System for Plasmonic Lithography 597 V. M. Murukeshan, K. V. Sreekanth and Jeun Kee Chua X 30. Nanosphere Lithography for Nitride Semiconductors 615 Wai Yuen Fu and Hoi Wai Choi 31. Micro- and Nanopatterning of Surfaces Employing Self Assembly 629 of Nanoparticles and Its Application in Biotechnology and Biomedical Engineering Claus Burkhardt, Kai Fuchsberger, Wilfried Nisch and Martin Stelzle 32. Strategies for High Resolution Patterning of Conducting Polymers 645 Lin Jiang and Lifeng Chi Advanced Photolithography