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
7.6
poises) 912 ˚C
Annealing Point (10
13.2
poises) 646 ˚C
Strain Point (10
14.7
poises) 596 ˚C
Properties
Density 2.42 g/cm
3
Young’s Modulus 65.8 GPa
Poisson’s Ratio 0.22
Shear Modulus 26.0 GPa
Vickers Hardness (200 g load)
Un-strengthened 489 kgf/mm
2
Strengthened 596 kgf/mm
2
Fracture Toughness 0.67 MPa m
0.5
Coefficient of Expansion 86.9 x 10
-7
/˚C
(0 ˚C - 300 ˚C)
Chemical Strengthening
Capability of >850MPa CS, and >50 µmDOL
Optical
Refractive Index (590 nm)
Core glass** 1.49
Compression layer 1.51
Photo-elastic constant 30.3 nm/cm/MPa
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
.
Reagent
HCl - 5%
NH
4F:HF - 10%
HF - 10%
NaOH - 5%
Time
24 hrs
20 min
20 min
6 hrs
Temperature
(°C)
95
20
20
95
Weight Loss
(mg/cm
2
)
34.7
3.3
39. 4
5.9
Electrical
Frequency (MHz)
54
163
272
381
490
599
912
1499
1977
2466
2986
Dielectric Constant
7.89
7.77
7.70
7.66
7.63
7.60
7. 43
7.39
7.37
7.34
7.33
Loss Tangent
0.026
0.024
0.024
0.024
0.023
0.024
0.024
0.025
0.025
0.026
0.027
Terminated coaxial line similar to that outlined in NIST Technical Notes 1520 and 1355-R.
** Core index is used for FSM-based measurements since it is unaffected by
ion-exchange conditions.
0
10
20
30
40
50
60
70
80
90
100
200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400
% Transmission
Wavelength (nm)
Wavelength [nm] Transmiance [%]
380 > 91.5
560 > 92.3
840 > 92.1
1200 > 92.1
1750 > 92.6
2000 > 92.5
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.
* Specifications subject to change
Putting Corning® Gorilla® Glass 4 to the test.
Greater damage resistance with deep
abrasion.
Enables thickness reduction
Improved Damage Resistance
0
10
20
30
40
50
60
70
0 0.2 0.4 0.6 0.8 1 1.2
Mean Failure Load [kgf]
Glass Thickness [mm]
Corning® Gorilla® Glass 3
Corning®Gorilla® Glass 4
(15 psi abrasion pressure)
(15 psi abrasion pressure)
0
2
4
6
8
10
12
14
16
Load [kgf]
Corning®
Gorilla® Glass 3
0.55 mm
Corning®
Gorilla® Glass 3
0.7 mm
Corning®
Gorilla® Glass 4
0.4 mm
(15 psi abrasion pressure)
Shallower check depth with higher abrasions levels
Check depth ~35 µm
Corning® Gorilla® Glass 4
Check depth ~75 µm
Corning® Gorilla® Glass 3
Corning and Gorilla are registered trademarks of Corning Incorporated, Corning, N.Y., USA
© 2015 Corning Incorporated. All rights reserved.
September 2015
For more information about Corning® Gorilla® Glass 4:
email: gorillaglass@corning.com
Web: CorningGorillaGlass.com