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

D 263 T

Thin and ultra-thin glass

Special Properties

  • Low microroughness (typically < 1 nm RMS)
  • Excellent flatness
  • Clear and practically colorless appearance
  • Good chemical resistance
  • Can be laser-marked
  • Very thin standard thicknesses down to 0,03 mm
  • Colorless borosilicate glass
  • Can be cut with a laser
  • Flexible at low thicknesses

Typical Applications

Related glass types

Request for Quotation

48h-Express Service Also available in 48 h Express-Service

D 263 T is a nearly colorless flat borosilicate thin glass made by SCHOTT. The specific properties and an extensive range of available standard thicknesses make D 263 T specialty glass an ideal choice for many technical glass applications. Due to the very smooth fire-polished surfaces D 263 T glass usually can be used without the requirement of additional mechanical polishing treatment because D 263 T exceeds already the surface quality grade and smoothness and even the flatness of most mechanical polishing processes. The microroughness of the glass surfaces typically is less than 1 nm (RMS). Measured against optical standards the flatness in particular of the ultra-low thicknesses is of course limited. The inherent weight alone is a limiting factor for the evenness of an ultra-thin glass. If this effect is taken into account, even the low glass thicknesses already offer an excellent flatness and optical surface quality.

SCHOTT produces d 263 T borosilicate thin glass by melting very pure raw materials. The specialty glass is very resistant to chemical attack. It offers a high and uniform optical transmittance in the visible range. But D 263 T also has a high infrared transmission that cannot be achieved by most other thin glass materials (You can obtain IR-transmittance curves on request).

D 263 glass is often used for display applications, but it can also be used as a substrate for optics and micro-optics or as a base glass for glass wafer applications. In research and science, it is often the best glass material for microscope slides and thin and ultra-thin coverslips that offer a high optical quality. The glass is nearly always available from us from stock at various extremely thin thicknesses with very low thickness tolerances. Our 48 h express-service capabilities are also available for this material.


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


Request for Quotation


Other materials in our extensive delivery program from SCHOTT are AF 32 eco, AS 87 eco, B 270 Superwhite, BK7, and BOROFLOAT 33.


*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 D 263 at 0,15 mm glass thickness


Transmission at 0,7 mm thickness

D263 optical transmission at 0,7mm thickness

Transmission of D 263 at 0,70 mm glass thickness


UV-Transmission at 0,7 mm thickness

D263 UV-transmission at 0,7mm

UV-Transmission of D 263 at 0,70 mm glass thickness


Optical Properties

  • Abbe number: ve = 55

Refractive index table


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 Capabilities

  • 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 6 h:
      1,4 mg/dm2
  • Alkali Resistance according to DIN ISO 695:
    • Alkali Class A2
    • Surface weight loss after 3 h:
      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 Glass 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 glass thicknesses are currently not produced. Please send us your inquiry in case of need.

For further technical information, please feel free to contact us.


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

© 1994-2019 Präzisions Glas & Optik GmbH