AS 87 neo
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Technical Details of AS 87 neo

AS 87 neo effortlessly meets the challenge of extreme stability while maintaining a lightweight form. This ultra-thin glass is perfect for applications where flexibility and touch sensitivity are crucial. AS 87 neo enables reliable high-performance technology with a modern, sleek design.

Ultra-thin cover glass, designed for durability and resilience

Built for tough challenges

AS 87 neo meets the high demands of modern high-performance technology for robustness, offering exceptional impact and bending strength. With outstanding durability, this glass reliably protects even under the harshest conditions and facilitates the development of mobile devices that are thinner, lighter, and more resilient than ever before.

Impressive surface quality

The fire-polished surface of AS 87 neo ensures optimal visual and tactile quality. With excellent light transmission and scratch resistance, this ultra-thin glass is ideal for high-resolution display protection and sensitive touch surfaces.

Flexibility in many dimensions

With glass thicknesses ranging from 75 μm to 330 μm, AS 87 neo sets a new standard for ultra-thin, high-strength glass. This range provides companies with exceptional flexibility in the production of modern electronics, covering a wide array of applications. The specialty glass enables foldable, well-protected devices without compromising touch sensitivity or functionality.

Flawless in form and function

Due to its unique manufacturing process, AS 87 neo stands out with superior geometric properties. The result is uniformly shaped glass of the highest quality, featuring tight thickness tolerances, extreme dimensional accuracy, and low defect levels, making it the ideal glass for applications with precise specifications.
Mechanical properties
Thermal properties
Optical properties
Chemical properties
Electrical properties
Mechanical properties      
Density p
(annealed at 40 °C/h)
  2.46 g/cm3
Chemical strengthening thickness in mm
temperature J in °C
time t in min
compressive stress
(CS) in MPa
depth of layer
(DoL) in μm

0.075
380
40
> 900

> 10

0.33
390
50
> 1000

> 12             
Young‘s modulus E     71.9 kN/mm2
Poisson‘s ratio μ     0.216
Torsion modulus G     29.6 kN/mm2
Knoop hardness HK 0.1/20     490
Vickers hardness HV 0.2/25     560
Thermal properties  
Coefficient of thermal expansion
(CTE) α (20-300 °C)		   9.2 · 10-6 K-1
Mean specific heat capacity
c p(20 –100 °C)		   0.87 J/(g · K)
Transformation temperature Tg   598 °C
Viscosities Viscosity 
in η in dPas		 Temperature
in °C
Strain point 14.5 577
Annealing point 13.0 616
Softening point 7.6   855

Optical properties  
Refractive indices ng 1.5151
Pretreatment of samples nF' 1.5109
Condition as supplied nF 1.5104
[„as drawn“] ne 1.5065
  nd 1.5044
  nD 1.5043 ± 0.0015
  nC' 1.5022
  nC 1.5017
Abbe value ve 57.7
Photoelastic constant C 
[nm/(cm*MPa)]		   29.0
 

 

Transmittance values    
Thickness 0.33 mm wavelength
at 254 nm
at 380 nm
at 632.8 nm
at 1064 nm		 τ (λ) in %
31.1
91.6
92.2
92.4
Edge wavelength
λC ( τ = 0.46)		 thickness in mm
0.075
0.33		 wavelength in nm
230
266
Luminous transmittance
τvD65 in %		  0.33 92 
Chemical properties
Hydrolytic resistance acc. to DIN ISO 719
Class HGB 2
Equivalent of alkali per gram of glass grains [µg/g] 56
Acid resistance acc. to DIN 12 116
Class S 4
Half surface weight loss after 6 hours [mg/dm²] 61
Alkali resistance acc. to ISO 695
Class  A 1
Surface weight loss after 3 hours [mg/dm²]  66
Electrical properties  
Dielectric constant ɛr
(at ν = 25°C)		 at 1 MHz
at 1 GHz
at 5 GHz		 8.4
7.6
7.5
Dissipation factor tan δ
(at ν = 25°C)		 at 1 MHz
at 1 GHz
at 5 GHz		 252 · 10-4
176 · 10-4
217 · 10-4
Conductivity
(at ν = 25°C)		 in S/cm
direct current		 160 · 10-12

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