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UV System Highlights

UV System Highlights. MICRO WAVES. UV. IR. GAMMA RAYS. X-RAYS. RADIO WAVES. VISIBLE. UVC UVB UVA UVV. 100 200 300 400 550 700. Nanometers (1nm = a billionth meter). Electromagnetic Radiation. Conventional. UV. Dry.

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UV System Highlights

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  1. UV System Highlights

  2. MICRO WAVES UV IR GAMMA RAYS X-RAYS RADIO WAVES VISIBLE UVC UVBUVA UVV 100 200 300 400 550 700 Nanometers (1nm = a billionth meter) Electromagnetic Radiation Confidential

  3. Conventional UV Dry Wet = Dry Film Thickness Heat Wet UV Exposure Solvent loss Curing not Drying! Confidential

  4. How UV is Produced • Medium pressure Mercury Arc lamp (up to 240W/cm) emits UV light. • Lamp power = 36kW (180cm × 200W/cm). Confidential

  5. Molybdenum Foil Tungsten Electrode Quartz Lamp Construction • Quartz envelope transparent to UV. • Withstands high operatiing temperature. • Low coefficient of expansion. Confidential

  6. Gas Electrons Mercury UV Lamp “Striking” • Ionization of Gas fill • Arc formed • Mercury vaporized to form plasma • UV photon emission Confidential

  7. UV Lamp cooling • Quartz temperature between 600°C & 800°C • Foil seal temperature below 250°C • Below 600°C:C = mercury condensation. • Above 800°C:C = quartz distortion & diversification • Cooling flow to match lamp power Confidential

  8. Quartz Body Electrode Molybdenum Foil UV Lamp cooling (Cont.) Confidential

  9. Characteristics of UV Lamps • ~ 25% UV light • ~ 20% Visible light • ~ 55% Infra-red (heat) Confidential

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