High-Index Glass Waveguides for AR Roadmap to Consumer Market
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High-Index Glass Waveguides for AR Roadmap to Consumer Market Dr. Xavier Lafosse Commercial Technology Director, Advanced Optics SPIE AR / VR / MR Conference February 2-4, 2020 Outline • Enabling the Display Industry Through Glass Innovations • Our Solutions for Augmented Reality Applications • The Challenges for Scalable and Cost-Effective Solutions Precision Glass Solutions © 2020 Corning Incorporated 2 Corning’s glass innovations have enabled displays for more than 80 years… 1939 1982 2019 Cathode ray tubes for Liquid crystal display (LCD) EAGLE XG® Glass is the black and white televisions glass for monitors, laptops LCD industry standard Precision Glass Solutions © 2020 Corning Incorporated 3 Corning is a world-renowned innovator and supplier across the display industry Cover Glass Glass For AR/MR Display for Display Waveguides Display Technologies Introduced glass panels for 1st active 12 years of innovation in cover Corning Precision Glass Solutions matrix LCD devices in 1980s glass for smartphones, laptops, (PGS) was the first to market with tablets & wearables ultra-flat, high-index wafers for top- Have sold 25 billion square feet of tier consumer electronic companies ® ® ® ® flagship Corning EAGLE XG Corning Gorilla Glass is now on pursuing augmented reality and more than 7 billion devices worldwide mixed reality waveguide displays Precision Glass Solutions © 2020 Corning Incorporated 4 PGS offers best-in-class glass substrates for semiconductor and consumer electronics applications Advanced Low-loss, low Wafer-level Waveguide displays packaging nonlinearity RF optics for augmented reality components Applications Glass Carriers Glass Substrates Optical Glasses High-Index AR Glass ® • CTEs: 3.4-12.6 ppm/°C • HPFS has exceptionally low • HPFS® fused silica: FEOL- • Refractive Indices ≥ 1.7 dielectric loss tangent: 10-4 @ • Select glasses available compatible & near-zero CTE • TTV ≤1µm 10GHz & is FEOL-compatible with high transmission & • Other optical glass • Wedge < 0.02 arcmin • Other compositions may be applications in CTEs from • Wafer diameters: 150-300 mm high stiffness properties FEOL-compatible with coatings 3.4-10.0 ppm/°C Corning Offers Precision Glass Solutions © 2020 Corning Incorporated 5 Corning enables the emerging AR/MR supply chain with high-quality materials and ancillary high-throughput equipment 1. Wider field of view 2. Higher equipment 3. Demanding 4. Higher throughput & lighter device & material utilization flatness requirements Customer Challenges: Corning Solutions: High refractive-index Larger-diameter Ultra-flat wafers Automated laser glass- glass & thinner form wafers measured with world- cutting machines factors class metrology Precision Glass Solutions © 2020 Corning Incorporated 6 Corning’s Augmented Reality Solutions deliver industry- leading substrates for superior image quality Glass Attributes Corning Offerings Refractive Index ≥ 1.7 Diameter (mm) 150 – 300 Thickness (mm) 0.3 – 1.0 TTV (µm) ≤ 1 Wedge (arcmin) < 0.02 Bow (µm) ≤ 20 Corning has the longest experience providing ultra- flat, high-index glass to OEMs for waveguide-based AR/MR. Demonstrated capacity >50K wafers/month Precision Glass Solutions © 2020 Corning Incorporated 7 Corning is committed to developing solutions for the next wave of AR/MR devices Development Sampling Production RI 2018 2019 2020 2021 2022 1.7 High RI 1.8 Compositions 1.9 2.0 Wafers: 150mm / 200mm / 300mm (0.3 – 1.0mm thick) 1.7 Wafers: 150mm / 200mm (0.3 – 1.0mm thick) D300mm (0.3 – 1.0mm thick) 1.8 Form Factor Wafers: 150mm / 200mm (0.3 – 1.0mm thick) D300mm (0.3 – 1.0mm thick) 1.9 150mm - D300mm (0.3 – 1.0mm thick) 2.0 All high-index substrates delivered with leading geometric tolerances Precision Glass Solutions © 2020 Corning Incorporated 8 Several trade-offs come with glass higher refractive index Processability Density (cost) Refractive Index Optical Chemical durability, transmission mechanical (Blue) reliability Precision Glass Solutions © 2020 Corning Incorporated 9 Process and composition levers are identified to improve density and transmittance of very high index glass (>1.9) Trade-offs between density and optical transmission (Index >1.9) 1.9 glasses in R&D improved (vs production ) Target Production 1.9/31 (80230) Composition move Process move Internal Transmission(10mm) 460 nm @ Density (g/cc) Precision Glass Solutions © 2020 Corning Incorporated 10 So…AG PHOTO Are we there yet? Refractive Index Flatness Wafer / Substrate Size Optical Transparency Density Cost Precision Glass Solutions © 2020 Corning Incorporated 11 Compared to flat panel display, AR/MR glass waveguide manufacturing is in its infancy 2015 Gen 10.5 – 2940 x 3370 2009 AR/MR: You are here Gen 10 – 2880 x 3130 2009 Gen 8.5 – 2200 x 2500 2006 2005 Gen 8 – 2160 x 2460 2005 Gen 7.5 – 1950 x 2250 2003 Gen 7 – 1870 x 2200 Gen 6 – 1500 x 1800 2002 Gen 5 – 1100 x 1250 2000 Gen 4 – 680 x 880 1995 1993 Gen 3 – 550 x 650 Gen 2 – 370 x 470 Sizes in mm Precision Glass Solutions © 2020 Corning Incorporated 12 A new glass forming technology is required to reduce finishing and enable a large consumer market Process of Record Vs. Continuous Sheet Process Technical Challenges Glass block • Devitrification Core drilling • Low viscosity Wire Saw • Warp • Thickness control Lapping $$ (TTV, wedge) Polishing Precision Glass Solutions © 2020 Corning Incorporated 13 Corning is writing a new chapter in its display glass history Glass For AR/MR Waveguide We are addressing key challenges… Product Performances • Very High Index • Optical Transmission (Blue) • Outstanding flatness Cost-effective glass forming process Precision Glass Solutions © 2020 Corning Incorporated 14 Thank you! To learn more, scan the QR code below to visit our website:.