Corning® Willow® GlassFlexible Glass Enabling Advanced Product Applications and Next-Generation Manufacturing

Casey KangSenior Manager, Commercial TechnologyCorning Incorporated

November 21, 2013

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Rigid material can be made flexible by reducing the thickness

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Introduced in 2012, Corning® Willow® Glass builds on a rich history of glass innovation

Willow® Glass © 2013 Corning Incorporated 4

Our vision is to help manufacturers process glass more efficiently through a roll-to-roll system

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Corning’s proprietary fusion glass process, which has enabled the flat panel display industry, makes flexible glass possible

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Fusion draw has superior glass surface quality compared to polymer films

** Ruchi Yongsunthon

Fusion Glass(AFM Measurements)

PEN Teonex Q65FA(AFM Measurements)

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The optical transmission of Corning® Willow® Glass exceeds existing polymer films in the market

Bare Substrate(Optical Transmission Measurements)

ITO Coating(Optical Transmission Measurements)

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Corning® Willow® Glass offers dimensional stability and process compatibility, which enables finer resolution patterning

GLA

SS

PE

NP

OLYIM

IDE

25 oC 150 oC

25 oC

150 oC

150 oC

25 oC

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Corning® Willow® Glass provides superior barrier performanceand is a benchmark for encapsulation technologies

MOCON Aquatron (Next-Generation Prototype)

Georgia Tech(Ca Patch Electrical Sensor)

Corning Incorporated(Ca Patch)

• 50°C, 100% RH• 5x10-5 g/m2-day• Below detection

limit

• 50°C, 85% RH• 6x10-5 g/m2-day• Limited by edge

seal performance

• Corning® Willow® Glass vs. polymer

• Room temperature• After 1 week

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Going thinner reduces bend stress and enables flexibility for roll-to-roll processing

700 m

200 m

50 m

Thickness

100 m

Glass bending stress is a function of thickness

Laser Cut Edge

Mechanical Score Edge

2-point Bend Testing Equipment

The strength of glass is determined by the edge

cutting quality

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Corning provides technical application support to enable roll-to-roll processing and handling of flexible glass

Sheets of flexible glass are handled differently than sheets of

rigid or thicker glass

Roll-to-roll processing of 100 micron thick glass has

been demonstrated

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Corning® Willow® Glass targets two product applications

Printable semiconductor& other active layers

1. Flexible Patterning Substrate 2. Transparent Barrier Superstrate

Encapsulation layer

High Temp Processing

Dimensional Stability

Light Weight

Moisture & O2 Barrier

High Transmission

Light Weight

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Numerous applications would benefit from Corning® Willow® Glass

Touch sensor and OLED

encap

Color filter for LCD & OLED

TFTs andFull displays

General signage Printed antenna Passive matrix display Smart window

Flexible display

OLED lightingEnergy storage and harvestingGeneral lighting

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Glass web roll-to-roll touch sensor fabrication demonstrated by ITRI in collaboration with CAMM and Corning

Vacuum Deposition Laser Patterning Film LaminationScreen Printing

Laser ablation process

Demonstrated 30µm ± 3µm lines and

spaces

S. Garner, G. Merz, J. Tosch, C. Chang, J. Lin, C. Kuo, J. Tseng, M. Chang, S. Lewis, R. Kohler, L. Tian, L. Simpson, M. Owens, X. Li, S. Huang, J. Shih, A. Wei, M.C. Lin, C.S. Huang, H.T. Lin, C.L. Lin, S.Y. Chang, C.T. Wang, J. Shen, C.H. Hsiao, S.T. Lu, J. Hu, C.T. Liu, H.Y. Lin, W.S. Yang, C.C. Su, J. Switzer, J. Steiner, “Ultra-Slim Flexible Glass for Electronic Application,” 2012 MRS Fall Meeting, Boston, Nov. 28, 2012.

PMMA-OCA film laminated to 100µm flexible glass web

Ag-ink conductor lines and bridges;

110µm width, <20µm height<150°C cure

Sputtered ITO50 /sq ITO layer,

70nm thick3% sheet resistance variability on the web

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Corning, in collaboration with ITRI, demonstrated roll-to-roll processing to develop touch sensor on Corning® Willow® Glass

ITRI Taiwan demonstrated ITO patterning on 500mm width

Corning® Willow® Glass

3.5” Multi-Touch Sensor was singulated from the glass web

and assembled

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Corning is developing the eco-system needed for adoption of flexible glass

External Eco-system

• Glass handling knowledge (rolls & sheets)• High strength cutting guidance• End application design

• Fusion process• Glass expertise• Technical service

Corning

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Summary

• Introduced in 2012, Corning® Willow® Glass builds on a rich history of innovation

• Our vision is to help manufacturers process glass more efficiently through a roll-to-roll system

• Glass has clear advantages compared to polymer in smoothness, light transmission, hermeticity, and dimensional stability

• Corning is developing the eco-system needed for adoption of flexible glass