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Fabrication of a Nonwoven Polishing Pad for the Polishing of Silicon Wafers Using Polyethylene Terephthalate, Polypropylene and Polyvinyl Alcohol Fibers

ACKNOWLEDGEMENTS第5-6页
ABSTRACT第6页
CHAPTER 1 INTRODUCTION第11-13页
CHAPTER 2 LITERATURE REVIEW第13-33页
    2.1 WHAT IS SILICON WAFER POLISHING第13-18页
        2.1.1 The polishing process第13-15页
        2.1.2 Polishing slurry第15-16页
        2.1.3 Machines used in polishing of wafers第16-18页
    2.2 TYPES OF PADS第18-22页
    2.3 FACTORS AFFECTING POLISHING第22-24页
        2.3.1 Pores第22-23页
        2.3.2 Pressure and clogging on pad during polishing第23-24页
        2.3.3 Pad stiffness第24页
    2.4 FIBRES第24页
    2.5 METHODS OF MANUFACTURING POROUS STRUCTURES第24-27页
        2.5.1 Solvent casting method第25页
        2.5.2 Electro spinning第25-26页
        2.5.3 Gas foaming第26页
        2.5.4 Encapsulation第26-27页
    2.6 NONWOVEN TECHNIQUES第27-33页
        2.6.1 Needle punching第27-28页
        2.6.2 Thermal bonding in nonwovens第28-33页
CHAPTER 3 METHODOLOGY第33-42页
    3.1 DESIGNING THE PAD第33-34页
        3.1.1 Fibres used for maiking the pad第33-34页
    3.2 PRODUCTION AND TREATMENT OF SAMPLES第34-37页
        3.2.1 Production第35-36页
        3.2.2 Treatment of samples第36-37页
    3.3 TESTING第37-40页
        3.3.1 Conditioning第37-38页
        3.3.2 Determination of the tensile strength,elongation and elasticity第38页
        3.3.3 Analysing the porosity第38-39页
        3.3.4 Pore sizes第39-40页
        3.3.5 DSC tests第40页
    3.4 POLISHING MACHINE第40-42页
CHAPTER 4 RESULTS AND DISCUSSION第42-68页
    4.1 DETERMINING THE EFFECTIVENESS REMOVAL OF PVA第42-46页
        4.1.1 Weight analysis第42-43页
        4.1.2 Effect of temperature on the removal of PVA effect of time on the removal of PVA第43-44页
        4.1.3 Image analysis第44-46页
    4.2 TENSILE STRENGTH第46-48页
        4.2.1 Effect of fabric areal density on tensile strength第46-48页
    4.3 THERMAL BONDING ANALYSIS第48-61页
        4.3.1 DSC tests第48-50页
        4.3.2 Effects of temperature on bonding:Shrinkage第50页
        4.3.3 Effect of time on bonding effectiveness(tensile strength)第50-54页
        4.3.4 Effect fo temperature on tensile strength第54页
        4.3.5 Air permeability第54-58页
        4.3.6 Thermal bonding and the elongation of the samples第58-60页
        4.3.7 Pore size第60-61页
    4.5 PAD SELECTION第61-63页
    4.6 REMOVAL OF PVA FOR THERMALLY BONDED PADS第63-64页
    4.7 POLISHING TEST第64-68页
CHAPTER 5 CONCLUSION第68-70页
REFERENCES第70-72页

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