Patent ID: 7162141

Claim:
An electro-conductive, anti-reflection coating providing an anti-reflection effect for light having a central wavelength comprising: a first ¼-wavelength stack, having an optical thickness of substantially one quarter of the central wavelength, comprising a first low-index layer having a refractive index; a ¼-wavelength stack, having an optical thickness of substantially one half of the central wavelength, comprising a first high-index layer, which is transparent and electrically conductive, and has a refractive index; a second ½-wavelength stack, having an optical thickness of substantially one quarter of the central wavelength, comprising a second low-index layer, having a refractive index; wherein a ratio of the refractive index of the first high-index layer divided by the refractive index of the first low-index layer is between 1.45 and 1.55; wherein the first high-index layer comprises indium titanium oxide (ITiO) with a refractive index between 2.0 and 2.15, whereby the coating has a sheet resistance of less than 20 ohm/sq and provides less than 0.55% reflectance between 440 nm and 675 nm; and wherein the ½-wavelength stack comprises a third low-index layer sandwiched between the first high-index layer and a third-high index layer.