1. Engineer Training UV System Highlights TJ8300 / TJ8500 UV System Highlights

2. Engineer Training UV System Highlights TJ8300 / TJ8500 Confidential 2 Electromagnetic Radiation VISIBLE UVIR MICRO WAVES RADIO WAVESX-RAYSGAMMA RAYS UVC UVB UVA UVV 100 200 300 400 550 700 Nanometers (1nm = a billionth meter)

3. Engineer Training UV System Highlights TJ8300 / TJ8500 Confidential 3 Curing not Drying! ConventionalUV Dry Solvent loss WetUV Exposure Heat Wet = Dry Film Thickness

4. Engineer Training UV System Highlights TJ8300 / TJ8500 Confidential 4 How UV is Produced  Medium pressure Mercury Arc lamp (up to 240W/cm) emits UV light.  Lamp power = 36kW (180cm × 200W/cm).

5. Engineer Training UV System Highlights TJ8300 / TJ8500 Confidential 5 Lamp Construction  Quartz envelope transparent to UV.  Withstands high operatiing temperature.  Low coefficient of expansion. Quartz Tungsten ElectrodeMolybdenum Foil

6. Engineer Training UV System Highlights TJ8300 / TJ8500 Confidential 6 UV Lamp “Striking”  Ionization of Gas fill  Arc formed  Mercury vaporized to form plasma  UV photon emission Gas Electrons Mercury

7. Engineer Training UV System Highlights TJ8300 / TJ8500 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

8. Engineer Training UV System Highlights TJ8300 / TJ8500 Confidential 8 UV Lamp cooling (Cont.) Electrode Quartz Body Molybdenum Foil

9. Engineer Training UV System Highlights TJ8300 / TJ8500 Confidential 9 Characteristics of UV Lamps  ~ 25% UV light  ~ 20% Visible light  ~ 55% Infra-red (heat)