US 7,070,471 B2 · Production method for plasma display panel

Abstract

A manufacturing apparatus for a PDP includes a unit for forming a protective layer protecting a dielectric layer on a first plate, a unit for baking a phosphor layer applied on a second plate, a unit for sealing the first and second plates arranged so that the protective layer faces the phosphor layer, and a unit for baking the first and second plates while exhausting a space between them. The four units are placed in one or more closed chamber. When the apparatus is driven, spaces in and between the closed chambers each contain a gas atmosphere with vapor partial pressure of 10 mPa or lower, or with a pressure of 1 Pa or lower, where the protective layer and the phosphor layer exhibit less water-absorbing property, preventing degradation of the PDP performances. The protective layer does not contact with atmospheric carbonic acid gas, preventing alteration thereof.

Claims29

Dependent claims

A manufacturing method for a plasma display panel, comprising:

a protective layer forming step of forming a protective layer on one main surface of a first plate, the protective layer protecting a dielectric layer;
a phosphor layer baking step of baking a phosphor layer that has been applied on one main surface of a second plate;
a sealing step of sealing the first plate and the second plate that have been placed in such a manner that the main surface on which the protective layer has been formed faces the main surface on which the phosphor layer has been baked;
and
a baking and exhausting step of baking the first plate and the second plate while exhausting a space formed between the first plate and the second plate,
wherein in each of the four steps and between every successive two of the four steps, the first plate and the second plate are continuously in a first gas atmosphere with a dew-point temperature of −30° C. or lower, or in a second gas atmosphere with a pressure of 1 Pa or lower.

3 more elements

A manufacturing method for a plasma display panel, comprising:

a protective layer forming step of forming a protective layer on one main surface of a first plate, the protective layer protecting a dielectric layer;
a phosphor layer baking step of baking a phosphor layer that has been applied on one main surface of a second plate;
a sealing step of sealing the first plate and the second plate that have been placed in such a manner that the main surface on which the protective layer has been formed faces the main surface on which the phosphor layer has been baked;
and
a baking and exhausting step of baking the first plate and the second plate while exhausting a space formed between the first plate and the second plate,
wherein in each of the four steps and between every successive two of the four steps, the first plate and the second plate are continuously in a first gas atmosphere with a dew-point temperature of −30° C. or lower, or in a second gas atmosphere with a pressure of 1 Pa or lower, and
a phosphor layer cleaning step of cleaning the phosphor layer, the phosphor layer cleaning step being provided between the phosphor layer baking step and the sealing step.

4 more elements

A manufacturing apparatus for a plasma display panel, comprising:

protective layer forming means for forming a protective layer on one main surface of a first plate, the protective layer protecting a dielectric layer;
phosphor layer baking means for baking a phosphor layer that has been applied on one main surface of a second plate;
sealing means for sealing the first plate and the second plate that have been placed in such a manner that the main surface on which the protective layer has been formed faces the main surface on which the phosphor layer has been baked;
and
baking and exhausting means for baking the first plate and the second plate while exhausting a space formed between the first plate and the second plate,
wherein the protective layer forming means, the phosphor layer baking means, the sealing means, and the exhausting and baking means are positioned in one or more closed chambers, when the manufacturing apparatus is driven, spaces in and between the one or more closed chambers each contain a first gas atmosphere with a dew-point temperature of −30° C. or lower, or a second gas atmosphere with a pressure of 1 Pa or lower.