# US 5,705,097 A · Fluorescent display device with conductive paste having Ag, Sb, and Zn

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- Number: US 5,705,097 A
- Document ID: US5705097A
- Status: Granted
- Kind: A
- Application number: 08/505,783
- Filed: 1995-07-21
- Granted: 1998-01-06
- Earliest claimed: 1993-07-08
- Assignees: Futaba Denshi Kogyo K.K.
- Inventors: Toshinori Suzuki; Kuniaki Kawatsu
- Web page: https://patentgrep.com/patent/US5705097A

## CPC

- H01B 1/02: mainly consisting of metals or alloys
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})

## Abstract

A conductive paste capable of effectively preventing current interruption in through-holes of a fluorescent display device. An anode substrate having Al film wirings formed thereon is laminatedly provided thereon with an insulating layer, which is then formed thereon with an anode conductor and phosphor layers in turn, leading to an anode. The insulating layer is formed with through-holes, in which the conductive paste is filled to make electrical connection between the wirings and the anode conductors. The conductive paste is formed of a mixture of Ag, glass and a vehicle, and Zn and/or Sb added to the mixture, wherein Zn and/or Sb are added to the mixture in an amount of 1 to 40 wt. % based on Ag. Zn and/or Sb serve as a catalyst for promoting alloying between Ag contained therein and Al, resulting in providing electrical connection therebetween with highly increased stability.

## Claims

### Claim 1

A fluorescent display device, comprising:
a substrate;
a wiring pattern made of aluminum, said wiring pattern being deposited on a surface of said substrate;
an insulating layer arranged on a surface of said wiring pattern and said substrate, said insulating layer having through-holes at predetermined portions thereof to expose said wiring pattern;
anode conductors formed on said insulating layer having phosphor layers deposited thereon and covering said through-holes and
a conductive paste filled in said through-holes for electrically connecting said wiring pattern to said anode conductors;
wherein said conductive paste contains Ag, glass, a vehicle, Zn and Sb, wherein the total amount of Zn and Sb is within the range of 1 to 40% by weight of Ag.

### Claim 2 (depends on 1)

The fluorescent display device of claim 1, wherein said Zn and Sb are mixed at a ratio of 1:1.