display technologies corning: the technology...

DisplayTechnologies

Corning: The Technology Behindthe Glass

Dr. David ChenDirector, Application Engineering and AsiaCommercial Technology TaiwanCorning Display Technologies Taiwan

June 13, 2008

2Display Technologies © Corning Incorporated 2008

Forward Looking And Cautionary Statements

Certain statements in this presentation constitute “forward looking

statements”within the meaning of the U.S. Private Securities

Litigation Reform Act of 1995. Such forward looking statements arebased on current expectations and involve certain risks and

uncertainties. Actual results might differ from those projected in the

forward looking statements. Additional information concerningfactors that could cause actual results to materially differ from those

in the forward looking statements is contained in the Securities and

Exchange Commission filings of the Company.


Outline

• The history and future of electronic display:four waves of opportunity

• Corning’s contributions to a-Si AMLCD

• TV application and large-size trends

• Corning’s innovation portfolio for high-performanceportable applications

• A look ahead: enabling component solutionsfor reflective display


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ueCorning’s technology strategy is based upon our central role inthe history of display and on our vision of the future

a-Si TFT-LCDVersatility

P-Si/OLED

CRT

Access

ePaper

Simplicity

Elegance

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Corning’s role in electronic display spans many decadesThe formula for success: scalable products and processes + enabling technologies

CRT

Access

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1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 2030

Corning’s cathode ray tube display(1939 New York World’s Fair)

Centrifugal casting oflarge-size color TV funnels

High-frequency electric sealing


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a-Si TFT-LCD

Our innovation formula helped enable theAMLCD revolution

Versatility

Advanced application support

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1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 2030

Precision fusion forming andoptical melting processes

Innovative glasscompositions


AM-LCDRevolution

… within which Corning has made a number ofcontributions

InnovativeCompositions

ImprovedAttributes

Ever-largerSizes

Reliable Supply


01996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 20071995

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ss D

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Two concurrent technology trends have evolvedduring this remarkable period of innovation

Larger Higher Performance Lower Cost

Large-size, high performance displays

Integration Higher performance New Form Factors

Small mobile devices


We have continued to increase Gen sizes tosupport the emergence of large-size LCD TV…

Year

InDevelopment

20062005

2004

2003

2002

20001995

1993

Gen 8

Gen 7

Gen 6

Gen 7.5

Gen 10

Gen 5

Gen 4Gen 3

Gen 2

LCD TV

InformationTechnology


History of substrate size increases

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1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 20071995

WorldwideGlass Demand

Gen 3 Gen 4 Gen 5 Gen 6 Gen 7 Gen 8


Gen 8 panelization

90%2426”

95%846”

97%1832”

94%3223”

90%652”

EfficiencyPanel #

Illustration showing Gen 8 substrate with six 52-inch panels

Gen 8 the current industry standard


Gen 10 will support a wide range of panel sizesGen 10 panelization

84%1837”

86%857”

89%1542”

84%2432”

84%665”

EfficiencyPanel #

Illustration showing Gen 10 substrate with eight 57-inch panels


Corning is locating Gen 10 glass manufacturing atSharp’s new manufacturing complex in Sakai City

Sharp site size:•~314 acres•Size of ~240 football fields

•Start-up timed with Sharp’scommercial plan

•Mutual economic benefits in logistics,inventory, and quality

Source: Sharp Corporation (aerial photo)


Three technology initiatives are critical to the successof Gen 10 manufacturing

Gen 10Gen 8

Extend Size

Increase Flow

Improve Glass Quality

+ +Lowest costLarge size Superior AttributesLowest costLarge size + +Lowest costLarge size Superior Attributes


Trends in visual performance are pushing glassattributes to higher performance levels

Faster response times Wider viewing anglesHigher contrast ratio

Contrast Ratio

Response Time

Viewing Angle

Brightness

Resolution

800:1

8 –12 ms

H: 170 / V: 160

300 –400 nits

Full HD –1920 x 1080

>5000:1

2 –5 ms

H: 178 / V: 178

450 –550 nits

Full HD


An active area of R&D in fundamental attributes—connecting sheet properties and mura

• The human eye has acertain sensitivity indetecting a contrast

• For a contrast to be visibleto the human eye, it mustexceed the minimaldetectable contrast i.e.,contrast threshold

• If the contrast > human eyecontrast threshold, it isobserved as mura on theLCD screen

can cause will causeGlass surfacenon-flatness

Cell gapthicknessvariation

Variation in the intensityof the transmitted light

or a contrast

Polarizer

ElectrodeCell Gap

Backlight

OutputLight

Substrate

32”VA mode module withcell gap of 3.7 um


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1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 2030

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P-Si/OLED

Corning is also very active in delivering innovationsfor the portable device/LTPS/OLED markets

Elegance


Ultimate Light and Thin

Multiple Functionality

Long Battery Life

Vivid High Resolution Screen

Mechanically Robust

User Interface Versatility

High-functionality portable devices have a numberof application challenges…


Green Laser

Silicon-on-Glass

PolysiliconSubstrate

OLED Frit Sealing

Cover Glass

… and offer multiple opportunities for Corninginnovations


What is Jade™ ?• Jade glass for advanced display:

Designed specifically for high-performance portable devices

– Intended for low temperature polysilicon (LTPS)and active matrix OLED applications (AMOLED)

• Jade is a new composition that has thermal durability built into its glasschemistry for unparalleled high temperature performance

– Eliminates the need for heat treatment or polishing, which candegrade the surface quality, shape, and attributes of the glass

– Pristine surface quality with cleanliness near semiconductor levels


Post-formingheat treatment step

Some glass suppliers or customers employ a secondary heattreatment method to “stabilize”the glass

•“Pre-compacts”the glass for increased thermal stability, thereby reducingglass contributions to dimensional errors in LTPS process

However -•Introduces additional process complexity•Increases risk of the substrate introducing variability in sheet shape,

surface quality, or thermal properties

Results of heat treatment step:

a-Si glass Finishing process


Post-formingheat treatment stepa-Si glass Polishing process

•Prepares the surface for the extraordinary surface requirements arising fromthe demanding device design of the polysilicon backplane

However -•Introduces variability into customer process through substrate surface issues

–Polished substrate’s surface roughness is propagated into critical device features–Polished surface may increase likelihood of particle contamination–Polishing introduces non-uniformities across the substrate surface

Results of polishing step:

Other glass suppliers employ a secondary polishingstep in substrate finishing


Finishing process

Jade™ eliminates need for heat treatment or polishing

•New high viscosity glass eliminates need for additional heat treatment step•Product maintains dimensional stability and uniformity - critical to theLTPS process

•Elimination of pre-compaction step preserves benefits of fusion glass:–Pristine surface quality–Outstanding thickness and shape control–Flexible capacity and reliable supply

•Jade™ is stronger under mechanical stress than conventional a-Si glass

Fusion-formedp-Si glass: Jade™


Jade™ provides improved compaction variabilitythrough its glass chemistry

( )( )1 exp /C T Ktα η∆ = ∆ − −

• All thermal processes in panel manufacture have thermal gradients

• These gradients will result in a variation in dimensional changeaccording to the following formula:

T1

T2For high viscosity glasses, exp term goes to1 and ∆C = 0 no matter how big delta T is!


Jade™ has a more stable shape in high temperaturecustomer processes• Calculation and our experimental results show that high viscosity glass

(such as Jade) distort much less under a high temperature / timecondition

• wc - sag at center of glass• - viscosity (Pa sec)• - density (kg/m3)• - time duration w/ creep flow (sec)• - half length of the glass sheet (m)• t - thickness of glass sheet (m)

l

2

4

125.6tlTwC ⋅∆⋅=

ηρ

Time (Hours)

Jade™

a-Si Glass

Nor

mal

ized

def

lect

ion

[cm

]

Comparison of Visco-Elastic Behavior of Corning Inc. Glasses at 600 C (“Thermal Sag”)

ELASTIC DEFORMATION

VISCOUS DEFORMATION

117.24 [g] total load

32.53 [g] train load

(Conditions: Applied total load 117.24 [g] in the center , span 5.2 [cm], thickness: 0.07 [cm], width: 0.30 [cm], initial train load 32.53 [g])


Jade has higher strength than a-Si glassPositive ROR (Ring-on-Ring) Test Result

• Jade™ has a higher surface strength that should result in astronger end product.

ROR - Abraded, Water Saturated Air, Lab TemperatureWEIBULL DISTRIBUTION

Failu

re P

roba

bilit

y

Strength (MPa)

Jade™EAGLE2000®

1737G

EAGLE XG™

Jade™

Stre

ngth

(MP

a)

Stress Rate (MPa/s)

a-Si Glass


Now in development:Vita™ hermetic sealing solution for OLEDs

• Vita™ is a complete technologysolution for OLED manufacture

• Glass-based approach offers animpermeable seal, increasing thelifespan of OLEDs by locking outair and moisture

• Expected to launch later in 2008


TFT Backplane (LTPS)

Cavity Etched Cover Glass

RG B RG BRG B RG B RG B RG B RG B RG B

EpoxyDesiccant

Existing Solution

•Not hermetic –Limited lifetime•Cavity etch and desiccant –Cost ↑

•Top emission challenging•Impractical for devices over 10”

TFT Backplane (LTPS)

Cover Glass

RG B RG BRG B RG B RG B RG B RG B RG B

Glass SealCover Glass

•Hermetic•Proprietary sealing process•No cavity or desiccant•Facilitates top emission•Scalable to large size applications

Vita™

Glass-based approach offers an impermeable seal,increasing the lifespan of OLEDs


Combination of Jade™ and Vita™ representsa breakthrough for OLED displays• Two major technical barriers have slowed the growth of

the OLED industry and limited the OLED application tosmall displays

Sensitivity of OLEDs to moisture and oxygen

Polysilicon backplane performance: OLEDsrequire a backplane with much higherperformance than a conventional LCD

SolutionProblem

Introduction of these products will help OLED technologyscale up to larger applications


Silicon-on-glass to enable next-generation,high-performance electronic devices

Jade™glass substrate

Single crystalsiliconLCD/OLED TFT &driver circuits

Display

• Jade™ is an optimal glass substrate for SiOG• SiOG provides increased electron mobility and uniformity• Offers value to high-end small to medium size (3”to 11”) screens• Major consumer electronics firms actively participating in development

Polysilicon Technology

Single Crystal Silicon-on-glass


• Laser projectors offer severaladvantages vs. LED– Image quality– Size– Power consumption

• Projectors with Corning’s greenlaser technology were showcasedat CES and SID 2008

• Ongoing engagement withhandset and projectormanufacturers

• Planning capacity to meetmarket demand

Green lasers enable portable micro-projection devices


20401980 1990 2000 2010 2020 2030

CRT PDP

Transmissive displays

OLEDp-Si TFT-LCDEmissive displays

Reflective displays

•Create new applications

•Non competing with LCD

•Potentially very largemarket

•Long term opportunities

a-Si TFT-LCD

* Graph is intended to show trends only. Curves are not quantitative.

Following emissive and transmissive technologies,reflective displays represent the next era in display


• Advantages of glass– O2 and H2O barrier– Chemically durable– Thermal capability– High surface quality– Bonding ability– Dimensional stability and elastic to

failure• No memory from repeated

stressing

• Challenges– Mechanical resistance and handling

100µm TFT-quality researchglass by Corning

• Drivers– Thin and light– Flexible and conformable– Roll-to-roll processing

Thin glass is an enabler of new form factors


Thin glass is an enabler of new form factors


Summary

• Corning has a sustained history of contributions toelectronic display

• In the area of active matrix LCD, we continue to drivescalable product and processes, innovative compositionsand R&D for advanced applications

• Innovations for portable applications include Jade™

substrates for LTPS & OLED applications and Vita™

hermetic sealing solutions for OLEDs

• Our forward-looking research portfolio includes componentsolutions for bi-stable reflective display

display technologies corning: the technology...

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