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Heat reflecting glass plate with multilayer coating

  • US 4,985,312 A
  • Filed: 12/01/1989
  • Issued: 01/15/1991
  • Est. Priority Date: 12/13/1988
  • Status: Expired due to Fees
First Claim
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1. A heat reflecting glass plate, comprising a transparent glass plate and a multilayer coating formed on one side of the glass plate, the multilayer coating comprising:

  • a base layer which is a film of a protective material selected from the group consisting of indium-tin oxide and AlN deposited on the glass plate surface;

    a first heat reflective layer which is a film of a metal selected from the group consisting of Ag and Cu deposited on said base layer and has a thickness in the range from 40 to 200 Å

    ;

    a first barrier layer which is a metal Zn film deposited on said first heat reflective layer and has a thickness in the range from 20 to 200 Å

    ;

    a first protective layer which is a film of said protective material deposited on said first barrier layer;

    a second heat reflective layer which is a film of said metal selected from the group consisting of Ag and Cu deposited on said first protective layer and has a thickness in the range from 40 to 200 Å

    ;

    a second barrier layer which is a metal Zn film deposited on said second heat reflective layer and has a thickness in the range from 20 to 200 Å

    ; and

    a second protective layer which is a film of said protective material deposited on said second barrier layer.

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