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Home / Products / Technical Glass / SCHOTT D 263 T Thin Glass

D263 T

Thin and ultra thin glass

Special Properties

  • Low micro roughness (typically < 1 nm RMS)
  • Excellent flatness
  • Clear and practically colorless appearance
  • Good chemical resistance
  • Very thin standard thicknesses (down to 0,03 mm)
  • Colorless borosilicate glass composition
  • Flexible at low thicknesses

Typical Applications

The specific properties and a large range of standard thicknesses make D263 T specialty glass a good choice for many technical glass applications. D263 T is a nearly colorless, flat borosilicate thin glass. Even the thin and ultra thin glass thicknesses feature an excellent flatness and a very good optical surface quality. Due to the very smooth fire-polished surfaces, D 263 T glass usually can be used without the requirement of additional mechanical polishing. It even exceeds the surface quality grade and smoothness of many mechanical standard polishing processes. The micro roughness of the glass surfaces typically is better than 1 nm (RMS). D263 borosilicate thin glass made by SCHOTT is produced by melting very pure raw materials. The thin specialty glass is very resistant to chemical attack. It has a high and uniform transmission in the visible range. But also in the range of up to 3000 nm, it offers a high infrared transmittance that cannot be achieved by most other glass materials (IR-transmittance curve can be obtained on request). D263 glass is often used for display applications but it can also be taken as a substrate for optics and micro-optics. In research and science, it is often the best glass material for thin cover slips with a high optical quality. The glass is available from stock at various thin and ultra thin thicknesses with very low thickness tolerance.

To receive a quotation for windows or substrates of original SCHOTT D 263 T or D 263 T eco* borosilicate glass with individual dimensions, please click the button below:

Request for Quotation

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*The "eco" materials have been made by SCHOTT using eco-friendly refining agents.


Transmission at 0,15 mm thickness

D263 optical transmission 0,15mm

Transmission of D263 at 0,15 mm glass thickness


Transmission at 0,7mm thickness

D263 optical transmission at 0,7mm thickness

Transmission of D263 at 0,70 mm glass thickness


UV-Transmission at 0,7mm thickness

D263 UV-transmission at 0,7mm

UV-Transmission of D263 at 0,70 mm glass thickness


Optical Properties

  • Abbe number: ve = 55

Refractive index chart


Wavelength (nm)

Refractive Index


Mechanical Properties

  • Density: 2,51 g/cm3
  • Young's modulus E: 72,9 kN/mm2
  • Poisson's ratio μ: 0,208
  • Torsion modulus G: 30,1 kN/mm2
  • Knoop hardness HK100: 590

Thermal Properties

  • Coefficient of mean linear thermal expansion
    (static measurement): 7,2 x 10-6/K (20-300 °C)
  • Viscosities:
    • Working Point (104 dPa): 1051 °C
    • Softening Point (107,6 dPa): 736 °C
    • Annealing Point (1013 dPa): 557 °C
    • Strain Point (1014,5 dPa): 529 °C
  • Transformation temperature Tg: 557 °C
  • Mean specific heat capacity (20-100 °C):
    0,82 J/(g x K)

Chemical Properties

  • Hydrolytic Resistance according to DIN ISO 719:
    • Hydrolytic Class HGB 1
    • Equivalent of Alkali (Na2O) per g of glass grains: 20 μg/g
  • Acid Resistance according to DIN 12 116:
    • Acid Class S2
    • Half surface weight loss after 6h:
      1,4 mg/dm2
  • Alkali Resistance according to DIN ISO 695:
    • Alkali Class A2
    • Surface weight loss after 3h:
      88 mg/dm2

Electrical Properties

  • Dielectric constant εr: 6,7 (1 Mhz)
  • Dielectric Loss tangent (tan δ): 61 x 10-4 (1 MHz)
  • Specific AC-Volume Resistivity ρD (Ω x cm):
    • 1,6 108 (250 °C / 50 Hz)
    • 3,5 x 106 (350 °C / 50 Hz)

Available Thicknesses 



48h-Eilservice Symbol
0,030 ±0,008 -
0,050 ±0,010
0,070* ±0,010 -
0,100 ±0,015
0,145 ±0,015
0,175 ±0,015
0,210 ±0,020
0,300 ±0,020
0,400 ±0,020
0,500* ±0,050 -
0,550 ±0,050
0,700 ±0,050
0,900* ±0,050 -
1,100 ±0,050
The thicknesses marked with are available within 48–h Express Service.
*These thicknesses are currently not available. Please send us your inquiry in case of need.

For further technical information, please contact us.

All given details and specifications are mean reference values and are not guaranteed. In addition, please consider our "Notes on technical specifications"