PLASMA DISPLAY PANEL HAVING DIELECTRIC LAYER WITH MATERIAL OF BUS ELECTRODE

• US 20020000774A1
• Filed: 01/26/1999
• Published: 01/03/2002
• Est. Priority Date: 06/25/1998
• Status: Active Grant

• Current Assignee: Maxell, Ltd.
• Original Assignee: Fujitsu Limited
• Inventors: BETSUI, KEIICHI, TADAKI, SHINJI, AWAJI, NORIYUKI
• Granted Patent: US 6,337,538 B1
• Time in Patent Office: Days
• US Class Current: 313/582
• CPC Class Codes: H01J 11/12 with main electrodes provided on both sides of the discharge space
• CPC Class Codes: H01J 11/24 Sustain electrodes or scan electrodes
• CPC Class Codes: H01J 11/38 Dielectric or insulating layers
• CPC Class Codes: H01J 2211/225 Material of electrodes
• CPC Class Codes: H01J 9/02 Manufacture of electrodes or electrode systems

Abstract

Local losses of material of transparent electrodes, in a plasma display panel including transparent electrodes, bus electrodes and, a dielectric layer covering these electrodes, are prevented by using a plasma display panel according to the present invention. The plasma display panel is formed on at least one substrate of a pair of substrates provided opposite each other via a discharge space. An element, which is a main element of the bus electrode composition, is included in the composition of the dielectric layer. Since the main element of the bus electrode is included in the dielectric layer, local losses of the transparent electrode can be prevented even through the high temperature baking process of the dielectric layer. A preferred choice as the main element of the bus electrode composition is copper, but other elements are also suitable and will perform acceptably.

Claims

1. A plasma display panel comprising:

a transparent electrode having a composition including a first element as a main element;

a bus electrode having a composition including a second element as a main element; and

a dielectric layer covering said transparent and bus electrodes on at least one substrate of a pair of substrates positioned in opposed relationship and defining a discharge space therebetween, said dielectric layer having a composition including said second element.

2. A plasma display panel according to claim 1, wherein said dielectric layer composition further comprises said first element.

3. A plasma display panel according to claim 1, wherein said bus electrode consists essentially of chromium-copper-chromium, and said dielectric layer composition includes copper oxide.

4. A plasma display panel according to claim 3, wherein a weight ratio of copper oxide in said dielectric layer is in the range of 0.1 to 3.0 wt %.

5. A plasma display panel according to claim 4, wherein a weight ratio of copper oxide in said dielectric layer is in the range of 0.3 to 1.0 wt %.

6. A plasma display panel according to claim 1, wherein said dielectric layer includes a low melting point glass.

7. A plasma display panel according to claim 6, wherein said low melting point glass is selected from the group consisting of lead oxide, bismuth oxide, and a phosphoric-acid based material.

8. A method of manufacturing a plasma display panel comprising a first substrate having formed thereon a plurality of transparent electrodes, a plurality of bus electrodes, and a dielectric layer covering said plurality of transparent electrodes and said plurality of bus electrodes and a second substrate positioned in opposed relationship to said first substrate and defining a discharge space therebetween, said method comprising:

forming a dielectric paste layer on said first substrate covering said plurality of transparent electrodes and said plurality of bus electrodes and having a composition including a main element of a composition of said bus electrodes;

baking said first substrate with said dielectric paste layer thereon in a baking atmosphere to form said dielectric layer.

9. A method of manufacturing a plasma display panel according to claim 8, wherein said composition of said dielectric paste layer includes a main element of a composition of said bus electrodes and a main element of a composition of said transparent electrodes.

10. A method of manufacturing a plasma display panel according to claim 8, wherein said main element of said composition of said bus electrodes comprises copper.

11. A method of manufacturing a plasma display panel according to claim 8, wherein the step of forming said dielectric paste layer includes forming a powder paste by dissolving at a high temperature copper oxide powder, with copper being said main element of said bus electrode composition, and a low melting point glass powder as a dielectric material, and then milling said copper oxide powder and said low melting point glass powder.

12. A method of manufacturing a plasma display panel according to claim 9, wherein the step of forming said dielectric paste layer includes forming a powder paste by dissolving at a high temperature copper oxide powder, with copper being said main element of said bus electrode composition, indium oxide powder, with indium being said main element of said transparent electrode composition, and low melting point glass powder as a dielectric material and then milling said copper oxide powder, said indium oxide powder, and said low melting point glass powder.

13. A method of manufacturing a plasma display panel according to claim 8, wherein said step of forming said dielectric paste layer includes mixing particles of said main element of said composition of said bus electrode in a powder mixture.

14. A method of manufacturing a plasma display panel according to claim 9, wherein said step of forming said dielectric paste layer includes mixing particles of said main element of said bus electrode composition and particles of said main element of said transparent electrode composition.

15. A substrate structure of an AC type plasma display panel comprising, on a substrate surface, a transparent electrode formed of a transparent conductor and a bus electrode formed of a metal conductor partly overlapping said transparent conductor, a dielectric layer covering said substrate surface in such a manner so as to be in contact with both said transparent electrodes and said bus electrodes, and said dielectric layer having a composition including a main element of a composition of said bus electrode in an amount sufficient to prevent diffusion of said bus electrode main element into said dielectric layer.

16. A substrate structure of an AC type plasma display panel comprising, on a substrate surface, a transparent electrode formed of a transparent conductor, a bus electrode formed of a metal conductor partly overlapping said transparent electrode, and a dielectric layer covering said substrate surface in such a manner as to cover and be in contact with both said transparent electrode and said bus electrode, said dielectric layer having a composition including both a main element of a composition of said bus electrode and a main element of a composition of said transparent electrode in an amount sufficient to prevent diffusion of said bus electrode and said transparent electrode into said dielectric layer.

18. A plasma display panel according to claim 16, wherein said dielectric layer composition also includes said second element.

19. A plasma display panel according to claim 16, wherein said first element is selected from the group consisting of aluminum alloys, cobalt, silver, molybdenum, chromium, tantalum, tungsten, iron, and copper.

20. A plasma display panel according to claim 18, wherein said first element is copper and said dielectric layer composition includes copper oxide.

22. A plasma display panel according to claim 18, wherein said second element is indium and said dielectric composition layer includes indium oxide.

23. A plasma display panel according to claim 19, wherein said second element is indium and said dielectric layer composition includes indium oxide.

17. A plasma display panel comprising:

a pair of substrates opposed to one another and separated by a discharge space;

at least one bus electrode formed on one of said pair of substrates having a composition including a first element as a main element;

at least one transparent electrode covering said bus electrode and having a composition including a second element as a main element; and

a dielectric layer formed on one of said substrates and covering said transparent and bus electrodes, said dielectric layer having a composition including at least said first element.

21. A plasma display panel according to claim 17, wherein said second element is indium and said dielectric layer composition includes indium oxide.