Glass-to-glass sealing method with conductive layer
First Claim
Patent Images
1. In a fluorescent display device of the type having a vitreous substrate, a concave glass cover plate having a sealing perimeter surface for sealing to said substrate, electrical elements on said substrate, and a meltable glass seal sealing said sealing perimeter surface to said substrate sealably enclosing said electrical elements within a sealed enclosure;
- the improvement comprising;
(a) said meltable glass seal containing from about 20 to about 60 percent lead and a trace of metallic nucleating agent;
(b) a substantially transparent conductive coating of metallic oxide on at least part of the inside surface of said glass cover plate; and
(c) said transparent conductive coating continuing through said seal between the inside and the outside of said sealed enclosure.
3 Assignments
0 Petitions
Accused Products
Abstract
A glass-to-glass seal with an intervening layer of metal oxide is made using a frit containing a high lead content and a metallic nucleating agent. The metal oxide may optionally be used to provide conductive paths through the seal without embedded metallic conductors.
-
Citations
12 Claims
-
1. In a fluorescent display device of the type having a vitreous substrate, a concave glass cover plate having a sealing perimeter surface for sealing to said substrate, electrical elements on said substrate, and a meltable glass seal sealing said sealing perimeter surface to said substrate sealably enclosing said electrical elements within a sealed enclosure;
- the improvement comprising;
(a) said meltable glass seal containing from about 20 to about 60 percent lead and a trace of metallic nucleating agent; (b) a substantially transparent conductive coating of metallic oxide on at least part of the inside surface of said glass cover plate; and (c) said transparent conductive coating continuing through said seal between the inside and the outside of said sealed enclosure. - View Dependent Claims (2, 3, 4, 5, 11)
- the improvement comprising;
-
6. A fluorescent display device comprising:
-
(a) a substrate (b) a plurality of elements on said substrate; (c) a concave cover plate sealed by a seal at its perimeter to said substrate and forming with said substrate a sealed enclosure containing said plurality of elements; (d) a layer of transparent conductive metal oxide on the inside surface of said cover plate, said metallic oxide being chosen from the group consisting of the oxides of tin indium and antimony; (e) a seal-piercing portion of said layer continuing through said seal to outside said sealed enclosure, said seal-piercing portion being of thickness greater than or equal to that of said layer on the inside surface of said cover plate; and (f) contact means external to said sealed enclosure for electrically contacting part of said layer outside said sealed enclosure and wherein electrical connection is made through said seal to the layer inside said cover plate solely through said seal piercing portion of said layer of transparent conductive metal oxide. - View Dependent Claims (7, 8, 9, 10, 12)
-
Specification