ITO stands for Indium Tin Oxide, more precisely, it is a mixture of indium oxide and tin oxide. Two important characteristic about this materials are:
Optically transparent with refractive index of between 1.4 and 1.8 which is close to that of soda lime glass (commonly use as based supporting substrate of LCD) .
It is conductive inorganic material. The conductivity of this layer depends on the thickness.
What ITO resistance is available? For ITO, the term of resistance is based on ohms per square. Commonly, ITO resistance which we used are 200, 120, 100, 80 and 25 depending on the requirements. The choice could be based on artwork design (such as trace width and area), current requirements, etc.