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SPI Supplies® Brand Indium-Tin-Oxide (ITO) Coated Substrates

Technical Data Sheet

Refractive index values


We present the refractive index data for the ITO coating supplied by SPI Supplies. It is the refractive index value used for calculating our ITO film performances. Remember that the ITO coatings made by SPI Supplies are sputtered and therefore are denser than coatings made by vacuum evaporation.

Wavelength
(nm)

Refractive
Index

Extinction
Coefficient

400

2.15

0.025

425

2.1

0.018

450

2

0.01

506

2

0.0087

600

2

0.0065

650

2

0.0044

700

2

0.0042

750

2

0.0042

800

2

0.004

1065

2

0.004

Coating resistivities and thicknesses are available as standard products:

Float glass (soda lime) Microscope Slides

Unpolished (standard microscope slides)

Sheet resistance and ITO thickness:

Nominal transmittance:

70-100 ohms/square (70 NM)

Greater than 88%

30-60 ohms/square (140 NM)

Greater than 88%

15-30 ohms/square (350 NM)

Greater than 85%

8-12 ohms/square (700 NM)

Greater than 83%



Polished

Sheet resistance and ITO thickness:

Nominal transmittance:

30-60 ohms/square (140 NM)

Greater than 88%

15-30 ohms/square (350 NM)

Greater than 85%

8-12 ohms/square (700 NM)

Greater than 83%


 

Fused quartz microscope slides (GE 124):

Sheet resistance and ITO thickness:

Nominal transmittance:

Less than 100 ohms/square (70 NM)

90%

10-20 ohms/square (700 NM)

85%



Polyester (PET) Polymer Film

Sheet resistance and ITO thickness: (Cold Only)

Nominal transmittance:

60-100 ohms/square (70-140 NM)

Greater than 88%

8-12 ohms/square (700 NM)

Greater than 83%

High Temperature Applications:

We have some test data on our ITO coating subjected to high temperatures for 3 x 12 hours cycles. Changes in resistance was observed and were found to be larger as temperatures got higher.

160 C             3 Cycles                2.5% Sheet Resistance Change

210 C             3 Cycles                4% Sheet Resistance Change

250 C             3 Cycles                16% Sheet Resistance Change

We do not recommend using this product at temperatures higher than 300 C.