Neutral, low emissivity coated glass articles and method for making

  • US 5,395,698 A
  • Filed: 06/04/1993
  • Issued: 03/07/1995
  • Est. Priority Date: 06/04/1993
  • Status: Expired due to Term
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First Claim
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1. A neutral, low emissivity coated article comprising:

  • a. transparent substrate having a refractive index in the range of about 1.5 to 1.6;

    b. a first transparent coating layer having a refractive index in the range of about 1.66 to 1.73 and a thickness in the range of about 400 to 600 Angstroms;

    c. a second transparent coating layer having a refractive index in the range of about 1.76 to 1.83 and a thickness in the range of about 350 to 550 Angstroms; and

    d. a metal oxide coating layer having a refractive index of at least 1.86 and a thickness sufficient to lower the emissivity of the coated substrate below the emissivity of the uncoated substrate.

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