Thin-film coatings, electro-optic elements and assemblies incorporating these elements

  • US 8,547,622 B2
  • Filed: 03/29/2012
  • Issued: 10/01/2013
  • Est. Priority Date: 03/03/2006
  • Status: Active Grant
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First Claim
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1. A transflective electro-optic (EO) mirror element for use in a vehicular rearview assembly, said transflective EO mirror element comprisinga first glass substrate having first and second surfaces, the first surface corresponding to a front of said rearview assembly, the second surface carrying a transparent electrically-conductive layer thereon;

  • a second glass substrate having third and fourth surfaces and disposed in a spaced-apart and parallel relationship with respect to the first substrate such as to form a gap between the second and third surfaces opposing one another, the third surface having a thin-film stack thereon that includes a layer of transparent conductive oxide (TCO) carrying a layer of high-reflectance material, wherein a value of sheet resistance of said thin-film stack is less than 6.8 ohms/square, a value of absorbance of said first substrate with the thin-film stack thereon is greater than 12%, a value of reflectance of said first substrate with the thin-film stack thereon is greater than 63%, and a value of transmittance of said first substrate with the thin-film stack thereon is greater than 2.5%;

    andan EO medium in said gap;

    wherein values of reflectance, absorbance, transmittance, and color characteristics are measured in light from a D65 standard illuminant, andwherein the high-reflectance material includes a material that defines higher reflectance relative to a material, of the thin-film stack, a contribution of which to a sheet resistance of the thin-film stack is the largest.

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