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US 5,270,517 AGranted
Method for fabricating an electrically heatable coated transparency
AssigneePPG Industries, Inc.
InventorJames J. Finley
Life of this patent
Estimating the term…
Abstract
A method for fabricating an electrically heatable coated transparency, particularly useful as a vehicle windshield, is disclosed. The method involves sputtering on a substrate surface layers of metal oxide, metal-containing primer, infrared reflective metal, metal-containing primer and metal oxide to produce an electroconductive coating, and applying first and second bus bars to the substrate in contact with the coating.
Claims8
A method for fabricating an electrically heatable coated transparency comprising the steps of:
- a. sputtering a metal cathode target comprising zinc and tin in a reactive atmosphere comprising oxygen thereby depositing a first transparent antireflective zinc/tin oxide film on a surface of a transparent substrate;
- b. sputtering a metal-containing primer layer on said antireflective zinc/tin oxide film;
- c. sputtering an infrared reflective electroconductive metallic film over said metal-containing primary layer;
- d. sputtering a metal-containing primer layer over said infrared reflective electroconductive metallic film;
- e. sputtering a second metal oxide film over said metal-containing primer layer to produce an electroconductive multilayer coating;
- and
- f. applying first and second bus bars to said substrate in contact with said coating.
4 more elements
A method for fabricating an electrically heatable coated laminated transparency comprising the steps of:
- a. placing a transparent nonmetallic substrate in a sputtering chamber;
- b. sputtering zinc and tin in a reactive atmosphere comprising oxygen to deposit a first transparent metal alloy oxide film on a surface of said substrate;
- c. sputtering titanium in an oxidizing atmosphere to deposit titanium oxide and then sputtering titanium in an inert atmosphere to deposit titanium to form 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 titanium to deposit a second titanium-containing primer layer on said silver film;
- f. sputtering zinc and tin in a reactive atmosphere comprising oxygen to deposit a second metal alloy oxide film on said second titanium-containing primer layer to produce an electroconductive multilayer coating;
- g. applying first and second bus bars to said substrate in contact with said coating;
- and
- h. laminating the coated transparent substrate with a second transparent substrate.
6 more elements
Dependencies are inferred from the claim text.