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US 4,806,220 AGranted
Method of making low emissivity film for high temperature processing
AssigneePPG Industries, Inc.
InventorJames J. Finley
Life of this patent
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Abstract
A multiple-layer, high transmittance, low emissivity coated article which can be subjected to high temperature processing such as bending, annealing, tempering, laminating or glass welding as a result of titanium-containing primer layers is disclosed.
Claims9
A method for making a high transmittance, high-temperature resistant film comprising the steps of:
- a. sputtering a metal cathode target in a reactive atmosphere comprising oxygen thereby depositing a first metal oxide film on a surface of a substrate;
- b. sputtering a metal-containing primer layer over said metal oxide layer;
- c. sputtering a reflective metallic film over said metal-containing primer layer;
- d. sputtering a second metal-containing primer layer over said reflective metallic film;
- e. sputtering a second metal oxide film over said second primer layer thereby producing a coated article with a visible transmittance lower than the desired visible transmittance of the final product;
- and
- f. heating said coated article to a sufficient temperature for a sufficient time to increase the visible transmittance of said high-temperature resistant film.
4 more elements
A method for making a multiple layer low emissivity coated product comprising the steps of:
- a. placing a transparent, nonmetallic substrate in a sputtering chamber;
- b. sputtering a cathode target comprising zinc and tin in a reactive atmosphere comprising oxygen to deposit a first transparent zinc/tin oxide film on a surface of said substrate;
- c. sputtering a titanium target to deposit a primer layer on said oxide film;
- d. sputtering a silver cathode target in an inert atmosphere to deposit a transparent silver film on said primer layer;
- e. sputtering a titanium target to deposit a second primer layer on said silver film;
- f. sputtering a cathode target comprising zinc and tin in a reactive atmosphere comprising oxygen to deposit a second zinc/tin oxide film on said second primer layer;
- thereby producing a coated article with a visible transmittance lower than the desired visible transmittance of the coated article;
- and
- g. heating said coated article at a sufficient temperature for a sufficient time to increase the visible transmittance of said low emissivity coated product.
6 more elements
Dependencies are inferred from the claim text.