Specific Process Knowledge

2nd Level - Process Topic

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Choose the process topic you are interested in

• Back-end processing

• Characterization

• Direct Structure Definition

• Doping

• Etch

• Imprinting

• Lithography

• Thermal Process

• Thin film deposition

• Wafer and sample drying

• Wafer Bonding

• Wafer Cleaning

• Wafer Information

• Materials

• III-V Process

Overview of sample processing

Clean your sample Dry your sample Create a thin film on your sample Dope your sample Thermal treatment of your sample Make a mask on your sample Transfer pattern to your sample Define your structure directly Bond your samples together Characterize your sample Pack your sample	Clean your sample Entry page in LabAdviser Techniques Materials Wafer cleaning Soap Sonic Removes dust and particles 7-up & Piranha Removes traces of organics and alkali ions RCA Two step process to remove traces of organics and metals 5% HF Removes native oxide IMEC Removing dust, traces of organics and alkali ions and slightly polish the surface. Make the surface hydrophillic Dry your sample Entry page in LabAdviser Techniques Materials Wafer and sample drying Spin dryers Whole wafers Critial point dryer Sensitive wafers Ethanol fume drying ? N2 blow drying N2 pistols Create a layer/film on your sample Entry page in LabAdviser Techniques Materials Thermal Process/Oxidation Thermal oxidation Thermal SiO2 Thin film deposition Sputter deposition Si,SiO2,Si3N3,TiO2, metals Thermal evaporation Al, ? E-beam evaporation Metals LPCVD Si3N4, SRN, SiO2, Si (poly and amorph) PECVD Si3N4, SiO2, PBSG Electroplating Ni Epitaxial growth /MOCVD ? Lithography/Coaters Spin coating resists, polymers Spray coating resists, polymers Dope your sample Entry page in LabAdviser Techniques Materials Thin film deposition/PECVD PECVD Deposition of SiO2 or Si3N4 doped with P,B and Ge Thin film deposition/Furnace LPCVD PolySilicon LPCVD Deposition of PolySi doped with B or P Thermal Process/Dope with Boron Predeposition and drive-in Doping Silicon wafers with boron Thermal Process/Dope with Phosphorus Predeposition and drive-in Doping Silicon wafers with phosphorus Doping Ion implant ? Thermal treatment of your sample Entry page in LabAdviser Techniques Materials Thermal Process Annealing (>500C) Si, PECVD layers Oxidation Si wafers Doping with B/P Si wafers Pyrolysis Resists? Rapid Thermal Anneal (RTP) ? ? BCB curing Baking (<300dg) baking resist and polymers, wafer removal Make a mask on your sample Entry page in LabAdviser Techniques Materials Lithography Photolithography UV resists Deep UV lithography DUV resists E-beam lithography E-beam resists Imprinting Polymers Lift-off mostly used for making metal masks Transfer mask pattern to your sample Entry page in LabAdviser Techniques Materials Etch Wet etch Si, Glass, SiO2, Si3N4, Al, Cr, Ti, Au, Pt, InP, InGaAsP, GaAs/AlGaAs Dry etch Any material Lithography/Lift-off ? Define your structure directly Entry page in LabAdviser Techniques Materials Imprinting Imprinting Polymers Direct Structure Definition LASER machining Lithography Lithographic definition Resists Direct Structure Definition Polymer Injection molding Polymers Bond your samples together Entry page in LabAdviser Techniques Materials Bonding Eutectic bonding Fusion bonding Anodic bonding Characterize your sample Entry page in LabAdviser What do you need to measure? Technique/Method Characterization Sample Imaging, XY dimensions Microscopy: optical,SEM,AFM Sample Topography AFM,Profiling with stylus or optical Film thickness and optical constants Ellipsometry,Reflectometry,Prism Coupling Film Stress Profiling with stylus or optical Wafer thickness Element analysis XPS,EDX,SIMS Contact Angle Resistivity Four point probe Doping level/Carrier density Photoluminescence Pack your sample (back-end) Entry page in LabAdviser Techniques Materials Back-end processing Chip/die mounting Wire bonding Dicing

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