Page 11 - Technology Pulse Magazine
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Corning Inc. Display Glass
Corning Inc. has long transitioned from being a manufacturer of dishes and household goods and even the largest manufacturer of optical fiber.!
Corning has now evolved to the display arena, introducing products that tackle the industry’s need for thinner glass for many consumer goods like TVs, Tablets, Cellphones, and even specialized windshields for today’s automobiles. ! New product releases are now available for the display industry including: Iris Glass which is a light-guide plate (LGP) for edge- lit LCD TVs. This
product has better performance characteristics than traditional plastic and allows TV manufacturers to design products with much slimmer profiles. !
Gorilla Glass is one flagship product that is more familiar within the consumer market and is now being used on over three billion devices.! Corning has worked with Samsung to produce the slim Galaxy ALPHA Smartphone, to identify one of a few collaborative ventures. !
Product Information
Benefits
• Enhanced retained strength after use
• High resistance to scratch and sharp contact damage • Improved drop performance
• Superior surface quality
Applications
• Ideal protective cover for electronic displays in: - Smartphones
- Laptop and tablet computer screens
- Mobile devices
• Touchscreen devices
• Optical components
• High strength glass articles
Dimensions
Thickness: 0.4 mm - 1.0 mm
Additional thicknesses available upon request.
Viscosity
Softening Point (10 poises) AnnealingPoint(10 poises)
Optical
Refractive Index (590 nm) Core glass**
Compression layer Photo-elastic constant
1.49 1.51 30.3 nm/cm/MPa
Corning® Gorilla® Glass 4 – Corning’s latest composition was formulated to address breakage – the #1 consumer complaint, according to Corning’s research. The new glass is just as thin and light as previous versions, but has been formulated to deliver dramatically improved damage resistance allowing improved in-field performance. Corning® Gorilla® Glass 4 has been tested for performance when subjected to sharp contact damage, such as asphalt and other real-world surfaces.
Wavelength [nm]
Transmiance [%]
380
> 91.5
560
> 92.3
840
> 92.1
1200
> 92.1
1750
> 92.6
2000
> 92.5
StrainPoint(10 Properties
Density
Young’s Modulus
Poisson’s Ratio
Shear Modulus
Vickers Hardness (200 g load)
Un-strengthened
Strengthened Fracture Toughness Coefficient of Expansion (0 C-300 C)
Chemical Strengthening
Capability of >850MPa CS, and >50 μmDOL
* Specifications subject to change
poises)
Temperature Weight Loss
2 (°C) (mg/cm )
Loss Tangent
0.026 0.024 0.024 0.024 0.023 0.024 0.024 0.025 0.025 0.026 0.027
912 646 C 596 C
2.42 g/cm 65.8 GPa 0.22 26.0 GPa
489 kgf/mm 596 kgf/mm
** Core index is used for FSM-based measurements since it is unaffected by ion-exchange conditions.
100 90 80 70 60 50 40 30 20 10 0
200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 Wavelength (nm)
Chemical Durability
Durability is measured via weight loss per surface area after immersion in the solvents shown below. Values are highly dependent upon actual testing conditions. Data reported is for Corning® Gorilla® Glass 4.
C
Time
Dielectric Constant
7.89 7.77 7.70 7.66 7.63 7.60 7.43 7.39 7.37 7.34 7.33
Reagent
HCl - 5%
NH4F:HF - 10%
HF - 10%
NaOH-5% 6hrs 95 5.9
24 hrs 20 min 20 min
95 34.7 20 3.3 20 39.4
0.67 MPa m 86.9 x 10
C
Electrical Frequency (MHz) 54
163
272
381
490
599
912
1499 1977 2466 2986
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Terminated coaxial line similar to that outlined in NIST Technical Notes 1520 and 1355-R.
