1. Back to Basics: Lesson 3 Conformal coating Application methods

2. Brushing Hand dispensing Hand spraying Dip coating Selective Coating Cost, Throughput Back to Basics: Lesson 3

3. Advantages: Minimal capital investment Low / med skill No masking Disadvantages:  Slow process  Inconsistency  Contamination  Operator exposure  Operator dependent Recommended for: Low volume, complicated board design Brushing Back to Basics: Lesson 3

4. Advantages: Low capital investment Quantitative method Semi automatic technique For gels and high viscosity Negatives:  Slow process  High film build Recommended for: Low volume, requirement for gels/high viscosity with connectors etc Hand Dispensing Back to Basics: Lesson 3

5. Advantages: Low capital investment Simplicity Tooling easily available Disadvantages:  Exposure / Emissions  Consistency  Cleanliness / Overspray  Masking Recommended for: Medium volume, Military customers as 2 coats can be quickly applied Hand spraying Back to Basics: Lesson 3

6. Advantages: High throughput Good penetration underneath components Good control of film thickness Recommended for: Medium/High volume, suitable board design, Disadvantages:  Contamination  Masking  Safety/exposure Dip coating Back to Basics: Lesson 3

7. Advantages: High throughput Can be used with UV40 Recommended for: High volume, UV curable Disadvantages:  Expensive  Requires tooling for each PCB  Safety/exposure Selective Dip coating Back to Basics: Lesson 3

8. Selective coating Advantages Repeatable results Reduces labour costs Increases productivity Improve quality No / little masking Disadvantages:  Capital investment  Training required Recommended for: High volume / throughput demands Selective Coating Back to Basics: Lesson 3

9. Asymtek SC300 Tri Mode

10. SELECTIVE COATING EQUIPMENT ASYMTEK FILM COATER ASYMTEK SWIRL PVADIMA HC-200 ApplicatorSC-200 SC-100 SC-300FS-ES-100 FS100-CF DD-5140 PrincipleNon atomised curtain coat Atomised spray coat Atomised spray coat and film coater Atomised spray coat Coating Viscosity Application Range < 100cPs> 100cPs23- 1000cPs Optimum Humiseal Viscosity23 cPs 65 cPs 250cPs 500cPs 23cPs / 65cPs 250 / 500cPs 23cPs / 65cPs 250 / 500cPs Coating TechnologySolvent Based100% SolidSolvent based And 100% Solid Solvent based And 100% Solid Back to Basics: Lesson 3

11. www.humiseal.com HumiSeal 295 University Avenue Westwood MA 02090 USA Tel: +1 781 8332 HumiSeal Europe 505 Eskdale Road Winnersh Wokingham Berkshire RG41 5TU United Kingdom Tel: +44 (0)1189 442 333 Back to Basics: Lesson 3