Micro / Nano Replication: Processes and Applications / Edition 1

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Overview

An introduction to micro and nano replication processes and applications

Micro/Nano Replication: Processes and Applications provides an overview of the fundamentals, processes, and applications involved in micro and nano replication in the manufacturing of product parts. A major field of nanotechnology, the study of micro/nano replication is sure to become one of increasing importance as the construction of completely new devices based on innovative concepts and crafted at the molecular level increases.

Designed to help the reader understand and learn to work with the growing number of tools for molding plastic components, the book covers the key topics related to replication, including patterning technology, the modification of mold surface properties, and much more. In addition, it addresses the strengths and weaknesses of different molding processes.

With a strong focus not only on how micro/nano replication works, but also the broader implications for the industry, the book is packed with examples of real world applications. These are drawn from a variety of fields, including information storage devices, optoelectronic elements, optical communication, and biosensors, in order to provide a complete view of the importance of micro and nano processes.

A valuable introduction to a new but fast-growing field, Micro/Nano Replication is an essential resource for anyone looking to get a head start on understanding this emerging discipline.

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Product Details

  • ISBN-13: 9780470392133
  • Publisher: Wiley
  • Publication date: 4/3/2012
  • Edition number: 1
  • Pages: 388
  • Product dimensions: 6.30 (w) x 9.30 (h) x 1.10 (d)

Meet the Author

Shinill Kang is a Professor of Mechanical Engineering and the Director of the Nanoreplication and Microoptics National Research Laboratory at Yonsei University. He received his PhD in mechanical engineering from Cornell University, is an author of over one hundred peer-reviewed journal articles, and has given numerous presentations at international conferences.

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Table of Contents

Author's preface7

1. Introduction 10

1.1 Introduction 10

1.2 Micro/nano replication 12

1.3 Application fields of micro/nano replicated parts 15

1.4 Required technologies for micro/nano replication 19

2. Patterning technology for micro/nano mold fabrication 27

2.1 Material removal 27

2.1.1 Mechanical machining 27

2.1.2 Laser ablation 28

2.1.3 Silicon etching process 29

2.1.4 Focused ion beam pattering 30

2.2 Lithography process 31

2.2.1 Electron beam lithography 31

2.2.2 Photo lithography 32

2.2.3 Reflow method 32

2.2.4 Laser interference lithography 38

2.3 Electroforming processes 42

2.3.1 Theory of electroforming process 43

2.3.2 Electroforming results 43

3. Modification of mold surface properties 51

3.1 Introduction 51

3.2 Study of thiol-based self-assembled monolayer 52

3.2.1 Thiol-based self assembled monolayer and deposition process 52

3.2.2 Experiment results and analysis 53

3.2.3 The changing properties of SAM at actual replication environment 54

3.2.4 Analysis of replicated polymeric patterns 56

3.3 Silane-based self-assembled monolayer (SAM) for nano master 57

3.3.1 Silane-based self-assembled monolayer 57

3.3.2 Deposition process of silane-based self assembled monolayer 58

3.3.3 Self-assembled monolayer on polymer mold 59

3.3.4 Analysis of replicated polymeric patterns 60

3.4 Dimethyldichlorosilane self-assembled monolayer for metal mold 60

4. Micro/nano injection molding with an intelligent mold system 63

4.1 Introduction 63

4.2 Effects of the mold surface temperature on micro/nano injection molding 64

4.3 Theoretical analysis of passive/active heating methods for controlling the mold surface temperature 65

4.3.1 Mathematical modeling and simulation 66

4.3.2 Passive heating 71

4.3.3 Active heating 73

4.4. Fabrication and control of an active heating system using a MEMS heater and an RTD Sensor 75

4.4.1 Construction of an intelligent mold system 75

4.4.2 Control system for the intelligent mold system 77

4.4.2.1 Kalman filter observer of the thermal plant 79

4.4.2.2 LQGI controller 81

4.4.2.3 Performance of the constructed control system 84

5 Hot embossing of microstructured surfaces and thermal nano imprinting 89

5.1 Introduction 89

5.2 Development of micro-compression molding process 90

5.3 Temperature dependence of anti-adhesion between a mold and the polymer in thermal imprintingprocesses 92

5.3.1 Defects in imprintedmicro optical elements 93

5.3.2 Analysis of polymer in process condition of thermal imprinting 93

5.3.3 Analysis of replication quality fabricated in different peak temperature 95

5.4 Fabrication of a micro optics using micro-compression molding with a silicon mold insert 96

5.4.1 Fabrication of microlens components using Si mold insert 96

5.4.2 Analysis of refractive micro lens 97

5.5 Fabrication of a microlens array using micro-compression molding with an electroforming mold insert 98

5.5.1 Fabrication of microlens components using Ni mold insert 98

5.5.2 Analysis of Replication quality 99

5.6 Application of micro compression molding process 100

5.6.1 Fabrication of a microlens array using micro-compression molding 100

5.6.2 Fabrication of metallic nano mold and replication of nano patterned substrate for patterned media 101

6 UV imprinting process and imprinted micro/nano structures 106

6.1 Introduction 106

6.2 Photopolymerization 106

6.3 Design and construction of UV-imprinting system 108

6.4 UV-transparent mold 108

6.5 Effects of processing conditions on replication qualities 110

6.6 Controlling of residual layer thickness using drop and pressing method 112

6.7 Elimination of micro air bubbles 113

6.8 Applications 114

6.8.1 Wafer scale UV-imprinting 114

6.8.2 Diffractive optical element 118

6.8.3 Roll to roll imprint lithography process 121

6.9 Conclusion 124

7 High temperature micro/nano replication process 128

7.1 Fabrication of metal conductive tracks using direct imprinting of metal nano powder 128

7.1.1 Introduction 128

7.1.2 Direct patterning method using imprinting and sintering 129

7.1.3 Mold and processing system 130

7.1.4 Defect analysis and process design 131

7.1.5 Analysis of imprinted conductive tracks 131

7.1.6 Conclusions 133

7-2 Glass molding of microlens array 134

7.2.1 Introduction 134

7.2.2 Fabrication of master patterns 135

7.2.3 Fabrication of tungsten carbide core for micro glass molding 136

7.2.4 Surface finishing and coating process of tungsten carbide core 138

7.2.5 Comparison of surface roughness before and after finishing process 139

7.2.6 Fabrication of glass microlens array by micro thermal forming process 140

7.2.7 Measurement and analysis of optical properties of formed glass microlens array 141

8. Micro/nano-optics for light emitting diodes 145

8.1 Designing an initial lens shape 146

8.1.1 LED illumination design 146

8.1.2 Source Modeling 147

8.1.3 Modeling a spherical refractive lens 147

8.1.4 Modeling a micro Fresnel lens 148

8.1.5 Verifying the micro Fresnel lens performance 149

8.2 Fabrication results and discussion 151

8.2.1 Fabrication of the micro Fresnel lens 151

8.2.2 Elimination of air bubbles 152

8.2.3 Optimization of the UV-imprinting process 152

8.2.4 Evaluation of the micro Fresnel lens for LED illumination 153

8.3 Conclusions 154

9. Micro/nano-optics for optical communications 158

9.1 Fiber Coupling Theory 159

9.2 Separated microlens array 161

9.2.1 Design 161

9.2.2 Fabrication 162

9.2.3 Measurement results 163

9.3 Integrated microlens array 166

9.3.1 Design 166

9.3.2 Fabrication 167

9.3.3 Measurement results 168

9.4 Conclusions 170

10. Hard Disk Drive (HDD) 173

10.1 Introduction 173

10.2 Fabrication of a metallic nano mold using a UV-imprinted polymeric master 175

10.3 Fabrication of patterned media using the nano replication process 181

10.4 Fabrication of patterned media using injection molding 184

10.5 Measurement and analysis of magnetic domains of patterned media by magnetic force microscopy 187

10.6 Conclusions 190

11. Optical Disk Drive(ODD) 194

11.1 Introduction 194

11.2 Improvements in the optical and geometrical properties of HD-DVD substrates 196

11.3 Effects of the insulation layer on the optical and geometrical properties of the DVD mold 199

11.4 Optimized design of the replication process for optical disk substrates 202

11.5 Conclusions 206

12. Biomedical applications 209

12.1 Introduction 209

12.2 GMR based protein sensors 210

12.2.1 Principle of GMR protein sensors 210

12.2.2 Principle of guided mode resonance effect 210

12.2.3 Nano replication process of a GMR protein chip for mass production 213

12.2.4 Feasibility test of GMR protein chip 217

12.3 Conclusions 218

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