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Prevention of the Degradation of Infrared Reflecting Visible Transmitting Films

IP.com Disclosure Number: IPCOM000103180D
Original Publication Date: 1990-Jul-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 27K

Publishing Venue

IBM

Related People

Hodgson, RT: AUTHOR [+4]

Abstract

Infrared reflecting films, such as SnO2, are sensitive to water vapor, and must be protected if they are used as insulating films on window glass or on plastic used as additional insulation in windows.

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Prevention of the Degradation of Infrared Reflecting Visible Transmitting Films

      Infrared reflecting films, such as SnO2, are sensitive to water
vapor, and must be protected if they are used as insulating films on
window glass or on plastic used as additional insulation in windows.

      It has recently been shown that thin films of Ta2O5 are
impervious to ion transport, and prevent water vapor from penetrating
such films.  Coating the infrared reflecting films with the
insulating and transparent Ta2O5 films deposited by magnetron
sputtering will prevent degradation of the underlying SnO2 films if
the films are deposited on a glass substrate.  For deposition on a
polymeric film substrate, layers of Ta2O5 should be deposited both
before and after the deposition of the SnO2 layer, since the polymer
is, in general, very transmissive of water vapor.

      Disclosed anonymously.