Back to results
US 5,346,651 AGranted
Silver containing conductive coatings
AssigneeCerdec Corporation
InventorsJoanna Oprosky, David Stotka
Life of this patent
Estimating the term…
Abstract
Silver-containing conductive coatings are provided. The coatings are prepared from compositions comprising silver particulate material, a low firing lead-free glass frit and a liquid organic vehicle. The composition is coated on a substrate and fired to fuse the silver-containing conductive coating to the substrate. The coatings find particular use in the field of automotive backlights. The coatings are of special value in eliminating solder wet through migration.
Claims12
A silver-containing conductive coating composition which comprises
- (a) from about 40% to about 90% by weight of a silver particulate material selected from the group consisting of silver powder, silver flake and mixture thereof,
- (b) from about 4% to about 12% by weight of a low firing lead-free glass frit having the following composition:
- ______________________________________ ZnO 13-18% by weight SiO.sub.2 18.0-25.0% by weight ZrO.sub.2 2.4-3.5% by weight B.sub.2 O.sub.3 7.5-12.5% by weight Na.sub.2 O 3.0-6.0% by weight Bi.sub.2 O.sub.3 35.0-46.0% by weight TiO.sub.2 1.0-2.5% by weight Al.sub.2 O.sub.3 0-1.0% by weight ______________________________________
- and,
- (c) from about 7% to about 40% by weight of a liquid organic vehicle which functions to form a dispersion of the silver particulate and glass frit materials and permit the easy application of the composition to a substrate.
2 more elements
Dependencies are inferred from the claim text.