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MY Polymers Ltd. - The Low Refractive Index Company mypolymers info@mypolymers

See us at Booth 4206. Low Index Re-coatings : Mitigating Oxygen Inhibition; Optimizing for UV LED. Ron Zohar, MY Polymers Ltd. MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com. Content (1 of 2). See us at Booth 4206. About MY Polymers

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MY Polymers Ltd. - The Low Refractive Index Company mypolymers info@mypolymers

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  1. See us at Booth 4206 Low Index Re-coatings : Mitigating Oxygen Inhibition; Optimizing for UV LED Ron Zohar, MY Polymers Ltd. MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  2. Content (1 of 2) See us at Booth 4206 • About MY Polymers • Opening notes: -The need for dedicated Re-Coating materials (Vs. using primary coatings) -Low Modulus is Crucial for High reliability • The LM-XXX-NI Line: Mitigating Oxygen Inhibition; Optimizing for UV LED • Oxygen inhibition: Description ; When does it matter ? • Solving or mitigating the oxygen inhibition problem MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  3. Content (2 of 2) See us at Booth 4206 • Optimizing for UV LED spot curing • The major trade-offs: Tackiness, Yellow coloration, curing wavelengths • The LM-XXX-NI: Currently available products and near term future products • Summary MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  4. About MY Polymers See us at Booth 4206 • We specialize in Low Refractive Index Optical Coatings, Adhesives and Polymers • Major products & applications • Primary Coatings for Specialty Optical Fibers • Re-coating materials for fiber lasers: combiners, splices, strippers,... • Low Index lamination adhesives, for electronic displays • Low index Bio-Photonic polymers (index=1.33) • Moisture Cured AR coatings and cladding materials • Optical adhesives MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  5. Re-Coating: Dedicated Vs. Primary Coatings See us at Booth 4206 • There is a need for DEDICATED Re-Coating Materials • Using Primary Coatings for Re-Coating is not an optimal selection, because there are major Contradictions in the Requirements : - The adhesion of a primary coating is limited by the requirement to enable stripping - The modulus of an ideal Re-Coating should be limited to enable stress dissipation under thermal cycling and thermal shock - An ideal recoating should not be sensitive to Oxygen Inhibition - And it should be compatible with UV LED spot curing MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  6. Re-Coating: Dedicated Vs. Primary Coatings See us at Booth 4206 MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  7. Reminder: Re-Coating is everywhere… See us at Booth 4206 MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  8. Low Modulus is Crucial for High Reliability See us at Booth 4206 • Thermal cycling and thermal shock cause stress build-up in the Re-Coating material • Low Modulus (High Flexibility) reduces stress because LM re-coatings elongate more than High Modulus re-coatings. • Therefore Low Modulus is Crucial for High Reliability MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  9. Re-Coating – Focus on Light Strippers See us at Booth 4206 MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  10. Recoating of Cladding Power Strippers See us at Booth 4206 • Strippers require Low Modulus Coatings in the range of 1.40 to 1.50 • Cascaded Strippers are becoming common in high power fiber lasers • Low Modulus is Crucial in re-coating of Strippers since this is a Power Dissipating Device • Recoating in a V Groove – difficult to prevent exposure to oxygen • LED UV spot curing is becoming widely used MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  11. Recoating Cladding Power Strippers See us at Booth 4206 • Cascaded Cladding Power Stripper: Heat dissipation is evenly distributed, preventing one high temperature hot spot. • 1.42 1.46 1.47 1.48 1.49 MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  12. Re-Coating of Strippers See us at Booth 4206 • Legacy: MY-142MY-146, MY-1465, MY-147, MY-148, etc. • LM : LM-142, LM-144 to LM-149: Low Modulus is Crucial for Reliability • The newest improvement LM-14X-NI : LM-142-NI, LM-146-NI, etc. Low Modulus + Reduced Sensitivity to Oxygen inhibition (No need For inert atmosphere) + UV-LED optimization MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  13. The LM-XXX-NI Line See us at Booth 4206 • Mitigating Oxygen Inhibition – No/Minimized need for an inert atmosphere during curing • Optimizing for UV LED spot curing • Plus Low Modulus (Highly Flexible) • Plus strong Adhesion MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  14. Oxygen Inhibition – Problem Description See us at Booth 4206 • UV curing (free radical) principle: Forming a free radical which reacts with a monomer or oligomer to initiate the polymerization • Oxygen “competes” with monomers by bonding first with the free radical • And this inhibits the polymerization process MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  15. UV Polymerization (Free Radical) See us at Booth 4206 Polymerization propagates thanks to the free Radical MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  16. The Problem: Oxygen Inhibition See us at Booth 4206 • Oxygen inhibition occurs when oxygen reacts with the free radical chain forming a non-reactive radical, and the propagation stops • This results in a liquid/tacky non-polymerized layer MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  17. Factors that enhance Oxygen Inhibition See us at Booth 4206 • Highly fluorinated resin (dominant in low RI resins) dissolves oxygen at a factor ofnn10-100 times • Low power UV sources require more time, therefore oxygen penetrates deeper • UV LED sources that provide only 320-400 nm rad. • Limited density of reacting groups, which is typical of Low Modulus materials MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  18. The solution: Factors that improve Surface Cure See us at Booth 4206 • Special formulation • Allowing a yellow color with absorbance tail up to 500 nm (but no impact on the working range 850 nm and up • High intensity UV source • Sources that have radiation at both 220-280 nm (UVA) and 320-400 nm (UVC) MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  19. Oxygen Inhibition – The solution See us at Booth 4206 • The absence of UVC requires yellowish photo-initiators • Accepting a yellow color with absorbance tail up to 500 nm • An “aesthetic problem” but No impact on the working range 850 nm and up ! MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  20. Other applications for our Low Index materials See us at Booth 4206 • Low Index Primary Coatings for specialty optical fibers: OF-136, OF-133, OF-138,.. • GK-731, GK-751 : Low Index lamination adhesives for Electronic Displays • Bio-Photonic Materials (Index 1.33 matches water and cells ) • Customized low index coatings, adhesives and polymers MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  21. Our Primary Coatings: OF-136, OF-133,… See us at Booth 4206 • OF-136 is our Best Selling Primary Coating • Index=1.36 • Highest Adhesion-Limited by stripping • High Modulus • Proprietary Adhesion Promoter : promotes adhesion under wet conditions (water immersion), while keeping good shelf life • OF-133 : Index=1.33, a Disruptive Product MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  22. GK-731: A Unique Combination of Low Index AND High Bond Strength See us at Booth 4206 • Usually, low index adhesives have low adhesion • GK-731 (Index=1.33) adhesion is ~100 times higher compared to our other Adhesives with Index=1.33 • GK-731 is a Lamination Adhesive: Films in LCD BLU , Bonding an Optical Touchscreen to the LCD,… • Other members of the GK line: GK-751, GK-731-S1 MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  23. Bio-Photonic Materials See us at Booth 4206 • Multiple applications utilize our materials with index of 1.33, that matches water and cell tissues • The matching index enables high quality microscope imaging over 3-D structures, such as micro-plates or micro-pillars. • The matched index allows construction of micro-fluidic devices, where the light is guided within the liquid in the micro-channels. MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  24. We Provide Custom Products See us at Booth 4206 • A different Refractive Index • Higher / Lower Viscosity • Higher (harder) Modulus, Lower (softer) Modulus • Higher / Lower Bond Strength • Different Cure Method • Other customized properties MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

  25. See us at Booth 4206 MY Polymers Ltd. - The Low Refractive Index Company www.mypolymers.com info@mypolymers.com

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