GB2258942A

GB2258942A - Plasma display panel and manufacture thereof.

Info

Publication number: GB2258942A
Application number: GB9214988A
Authority: GB
Inventors: Tae-Hyu Oh
Original assignee: Samsung Electron Devices Co Ltd
Current assignee: Samsung SDI Co Ltd
Priority date: 1991-08-22
Filing date: 1992-07-15
Publication date: 1993-02-24
Anticipated expiration: 2012-07-15
Also published as: KR940004186B1; GB9214988D0; GB2258942B; KR930005073A; JP2612995B2; JPH07192636A; DE4222818A1

Description

--, 2 -, ' -); -:, 1 PLASMA DISPLAY PANEL AND MANUFACTURING METHOD

THEREFOR The present invention relates to a plasma display panel and manufacturing method theref or, and more particularly to a trigger discharge type plasma display panel and a method f or manufacturing the same.

A trigger discharge type plasma display panel (hereinafter referred to as PDP) is described in U.S. Patent No. 4,562,434, having the s--ructure shown in FIG. 1 of the accompanying drawings. Here, strip-shaped anodes 5 and cathodes 6 are arranged in an X-Y matrix on the respective inner surfaces of a face plate 1 and a rear plate 2. Also, barrier ribs 3 having a predetermined height to prevent crosstalk, are arranged between and parallel to anodes 5. A trigger electrode 7 with a dielectric layer 4 thereon are provided on plate 2 below cathode 6.

In the conventional PDP constructed described above, when a trigger discharge is created between cathodes 6 and trigger electrode 7, positive wall charge is built up on dielectric layer 4. When a predetermined voltage is applied to both anodes 5 and cathodes 6, following the trigger discharge, main discharge easily occurs with the assistance of the wall charge by the trigger discharge. In order to produce an effective trigger discharge in such a conventional PDP, the distances between cathodes 6 should be as wide as possible, thereby widening the areas where the wall charge is built up. That is, if the distance between cathodes becomes narrow, the area of dielectric layer 4 exposed between 2 cathodes 6 also becomes narrow, so that the wall potential is not sufficient and impedes a sufficient trigger discharge effect.

Due to these f acts, the conventional PDP is burdened with the restriction of maintaining the inter-cathode distance at a predetermined interval or greater in order to obtain the trigger discharge effect, and thus has difficulties in incorporating a cathode arrangement which can realize a highly defined picture. In other words, to obtain a highly def ined picture, the distance between cathodes should be narrowed as much as possible. However, in the conventional PDP, when the distance between cathodes becomes narrow, effective trigger discharge cannot be obtained, so that the decrease of the space between cathodes is limited.

An object of the present invention is to solve the abovedescribed problems of the conventional PDPs. Accordingly, it is an object of the present invention to provide a plasma display panel which can realize a highly defined picture by forming compactlyarranged cathodes.

It is another object of the present invention to provide a manufacturing method suitable for manufacturing a plasma display panel which attains the above object.

According to one aspect of the present invention, there is provided a plasma display panel comprising:

f ace plate and a rear plate spaced apart from each other at a predetermined interval; plurality of anodes arranged in parallel on the inner surface of the face plate; 3 a trigger electrode having a first layer formed on the whole surf ace of the rear plate and striped second layers arranged in parallel to the anodes on the upper surface of the first layer, and grooves defined by the adjoining second layers; a dielectric layer having grooves corresponding to the grooves in the. trigger electrode, and f ormed on the trigger electrode; and a plurality of parallel cathodes arranged perpendicular to the anodes, and formed on the dielectric layer to have a predetermined interval from the bottom surface of the grooves of the dielectric layer.

According to another aspect of the present invention there is provided a manufacturing method for a plasma display device comprising the steps of:

arranging a plurality of striped anodes in parallel on the inner surface of a face plate; forming a first layer of a trigger electrode on the inner surface of a rear plate facing the inner surface of the face plate; arranging a plurality of striped second layer of the trigger electrode in parallel to the anodes on the surface of the first layer, thereby completing the trigger electrode which has a plurality of parallel grooves arranged in the upper surface thereof; coating a dielectric material of a predetermined thickness on the whole surface of the upper portion of the trigger electrode, and forming a dielectric layer having grooves 4 corresponding to the parallel grooves of the trigger electrode; filling the grooves of the dielectric layer with a mediating layer; forming a plurality of striped cathodes on the dielectric layer and mediating layer, in the direction perpendicular to the anodes; providing spaces between the bottom surface of the grooves and the cathodes over the grooves, by removing the mediating layer; and forming one unit by coupling the face plate to the rear plate.

Embodiments of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic perspective view of a conventional PDP; FIG. 2 is a schematic perspective view of a PDP according to an embodiment of the present invention; and FIGs. 3A to 3E illustrate steps in the method for manufacturing a PDP according to an embodiment of the present invention.

A plasma display panel according to an embodiment of the present invention has the structure shown in FIG. 2. Here, anodes 50 extending in a first direction and cathodes 60 in a second direction perpendicular to the f irst, are arranged at predetermined intervals between a face plate 10 and a rear plate 20, intersecting each other. Also, barrier ribs 30 having a predetermined height for preventing crosstalk are formed between respective anodes 50 in the first direction.

A trigger electrode 70 which has grooves on the upper portion thereof and is formed by strip shaped second layers 72 and a first layer 71 (Fig. 3E) provided on the surface of rear plate 20. A dielectric layer 40 of a predetermined thickness is formed on the whole surface of the trigger electrode 70. Accordingly, dielectric layer 40 also has grooves corresponding to the grooves of trigger electrode 70.

Cathodes 60 are provided which extend over dielectric layer 40, across and spaced from the bottom surfaces of the grooves of dielectric layer 40 by a predetermined interval. In this embodiment of the PDP, when a trigger voltage is applied to trigger electrode 70 trigger discharge is created building up wall charge along the grooves of dielectric layer 40.

The bottom surface of the grooves of dielectric layer 40 is spaced from cathodes 60. Therefore, even if the distance between respective cathodes becomes narrow, wall potential can be charged on the bottom surfaces of the grooves, so that the distance between respective cathodes is sufficiently reduced. In addition, as compared with the conventional PDP, if this distance is not reduced, cathodes 60 can instead be widened, so that the main discharge efficiency between anodes 50 and cathodes 60 is enhanced. As a result, the main discharge contributing to the picture display is strong, thereby emitting brighter visible rays.

6 The f oregoing embodiment of a PDP can be manufactured by the method described below.

As illustrated in FIG. 3A, f irst layer 71 of trigger electrode 70 is formed on the whole surface of rear plate 20. As shown in FIG. 3B, stripshaped second layers 72 are formed on the surface of this f irst layer 71 at predetermined intervals, thereby completing the formation of trigger electrode 70 with grooves. As shown in FIG. 3C, dielectric layer 40 is formed on the whole surface of the trigger electrode 70 so as to have grooves corresponding to those of trigger electrode 70. An incomplete mediating layer (80) is then formed on the whole surface of dielectric layer 40. As shown in FIG. 3D, the upper portion of this incomplete mediating layer (80) is ground by a predetermined amount! so that mediating layers 80 are provided within each groove. Then, a plurality of strip-shaped cathodes 60 which are arranged parallel to each other and at right angles to the grooves, are formed on the upper surface of dielectric layer 40 and mediating layers 80.

As shown in FIG. 3E, the mediating layers 80 interposed between dielectric layer 40 and cathodes 60 are then removed so as to space cathodes 60 apart from the bottom surface of dielectric layer 40 at a predetermined distance. At this time, the mediating layer is preferably removed using a corrosive agent such as, for example, an etching solution. Thus, cathodes 60 are maintain a predetermined distance from the bottom surfaces of the grooves of dielectric layer 40.

7 The above-described manuf acturing steps are a part of the whole PDP manufacturing process with other steps following the general manufacturing process.

The embodiment of the present invention described above is a PDP having a simple structure. However, the present invention is also applicable to a variety of PDPs. The present invention is preferably adopted in PDPs having a more complicated structure, especially PDPs for displaying highly defined pictures. Thus, it will be readily apparent to a man skilled in the art that changes may be made in the above-described PDP without departing from the true scope of the present invention.

8

Claims

CLAIMS:

A plasma display panel comprising: a f ace plate and a rear plate spaced apart from each other by a predetermined interval; a plurality of anodes arranged parallel to each other on the inner surface of said face plate; a trigger electrode comprising a first layer which extends over the entire inner surf ace of said rear plate and stripshaped second layers thereon which def ine grooves therebetween and extend parallel to said anodes; a dielectric layer on said trigger electrode which has grooves corresponding to the grooves in said trigger electrode, and a plurality of parallel cathodes on said dielectric layer which extend perpendicular to said anodes, and are a predetermined interval from the bottom surface of the grooves of said dielectric layer.
2. A manufacturing method for a plasma display device comprising the steps of: arranging a plurality of strip-shaped anodes in parallel to each other on one surface of a face plate; forming a f irst layer of a trigger electrode on one surface of a rear plate; arranging a plurality of strip-shaped second layers of said trigger electrode on said first layer so as to define parallel c 9 grooves in the upper surface of said trigger electrode; coating a dielectric material of a predetermined thickness on the entire surface of said trigger electrode, to form a dielectric layer having grooves corresponding to said parallel grooves of said trigger electrode; f illing said grooves of said dielectric layer with a mediating layer; forming a plurality of strip-shaped cathodes on said dielectric layer and mediating layer, extending in a direction perpendicular to said grooves; removing said mediating layer to provide spaces between the bottom surface of said grooves of said dielectric layer and said cathodes, and coupling together said face plate and rear plate to form one unit with said one surface of each plate f acing that of the other and said anodes and cathodes extending perpendicular to each other.
3. A plasma display panel substantially as hereinbefore described with reference to FIG. 2 of the accompanying drawings.
4. A manufacturing method of a plasma display device substantially as hereinbef ore described with reference to FIGs. 3A to 3E of the accompanying drawings.