Precision Fair 2013 Stand 171 Plasma Electronic is Partner of Tailor-Made Surfaces by Plasma Technology Dr. J. Geng, Plasma Electronic GmbH
Modern Surface Technology in 1900
Overview A short introduction to plasma technology - What is Plasma? -A little physics - Overview over industrial applications Activation / Cleaning of surfaces PECVD: principles, applications and machines PEALD: principles and applications PVD: principles, classification, applications
Introduction What is plasma? Gas discharge containing charged particles Stars / nuclear fusion - flames / lightnings / fluorescent lamps
Introduction Plasma technology utilizes this phenomenon for surface modifications
Introduction: Hot and cold!? Plasma = Gas + electronic excitation= molecules + excited molecules + molecule fragments + UV + Ions + Electrons Low- Pressure regime Flame Pressure
Introduction Technical applications in surface technology? Stand 171 Atmospheric plasmas: - Arc discharges (welding) - Flame coatings - Flaming of polymer surfaces - Atmospheric Plasma Sources for Surface Activation / Cleaning Low pressure plasmas: - Ion-Plating for metal coatings - Low pressure plasma activation / cleaning - PVD-Sputtering for metal contaning coatings - Arc-PVD for metallic coatings - Plasma-CVD or PECVD
LPP-machine principle Vacuum chamber Process gases Decomposition products ENERGY Modified surface Work piece
Activation / Cleaning Increases the wettability of surfaces ENERGY Exhaust O 2 H 2 O CO 2 Surface Modified Surface
Activation of automotive parts Painting of car outer parts Material mix Semi-Inline
Activation of toys Materials: Plastics (Polystyrole ) Batch process (tumbler)
Activation of ophtalmic lenses Batch process Inline
PECVD coating PECVD: coating from reactive gases ENERGY C 2 H 4 Surface Coated Surface
Example: Diamond Like Carbon DLC bridges coating characteristics PTFE/Teflon PVD: TiN, TiAlN etc. + anti sticking / hydrophobic corrosion protection low friction - thick soft DLC + thin hard temperature resistant - Sticking / hydrophilic corrosion high friction
Applications
Example: Multilayer
Machines Myplas: 10 l; 200W CVD-Domino: Porta900: Porta200: CVD-Piccolo: 730 200 8045 l; l; 3000W l; 5000W l; 2000W 1000W
Changing wettability
Example: Aquacer (hydrophilic) Aquacer properties Thickness: >10 nm Surface tension: 60-70 dynes Static contact angle: 20-30 Temperature stability: 400 C Good wetting
Example: Aquacer (Dish washer baskets) Material: PP Effect: - less drops - faster drying - less stains
Example: Aquacer (Biotech disposals) Good flow of blood in channnels of disposables Good flow of blood or other liquids in wells
Example: Lipocer (hydrophobic) Lipocer properties Thickness: >10 nm Surface tension: 20 dynes Static contact angle: 107 Temperature stability: 300 C Bad wetting
Example: Lipocer Application: Biotech disposals
Example: Lipocer (Coating of rubber) Applications: Why coating rubber? Polymer O-rings: properties: - High no flexibility sticking for together sealing tasks - Disadvantage: High tacking / sticking affinity noise reduction Consequence: - Problems High speed with automatic valves assembling - System faster risks opening (e.g. security (micro seconds ) valves) - Wear Security valves Thin PECVD-coating open at the mean on pressure rubber as even an alternative to lubricants after years (nuclear power plants)
Example: Polymer-Beschichtung Lipocer (Coating of rubber) Reactive O2-Plasma Inert Gas Gas Plasma-Coating(s) Contaminations: H 2 O, grease, oil... Crosslinked Layer Polymer: EPDM, FPM, NBR, TPE...
PEALD PEALD: Plasma Enhanced Atomic Layer Deposition Plasma
PEALD Plasma Enhanced Atomic Layer Deposition The most precise, conformal atom by atom deposition
PVD PVD: Physical Vapour Deposition Thermal Evaporation Electron Beam Evaporation Diode Sputtering Magnetron Sputtering Arc Evaporation Ionisation
PVD Ion-Sputtering: Coating from a solid target Source: ILP, Universität Essen
PVD Magnetron-Sputtering Ti DUAL design Al
PVD machine PVD-metallization machine (Cr on paint) Chamber size: 8500 l Base pressure: <0.02Pa Working pressure:0.5 Pa Cycle time: 30 min
Plasma A Powerful Tool!