Starched agent and glass powder for forming dielectric for plasma display board

Abstract

PROBLEM TO BE SOLVED: To provide a dielectric formation paste for a plasma display panel excellent in transparency, and capable of forming a dielectric layer having a high breakdown voltage. ŽSOLUTION: This paste has a particle size distribution wherein the maximum particle diameter D<SB>MAX< / SB>is 15μm or less, D<SB>90< / SB>is 7μm or less, D<SB>75< / SB>is 4μm or less, D<SB>50< / SB>is 3μm or less, and D<SB>25< / SB>is 2μm or less, and contains glass powder having a specific surface area of 1.0-4.0 m<SP>2< / SP> / g. Ž

Description

technical field [0001] The present invention relates to a dielectric forming material used to form a dielectric layer of a plasma display panel. Background technique [0002] The plasma display panel has a front glass plate and scan electrodes for plasma discharge formed on the front glass plate. A dielectric layer having a film thickness of 30 to 40 μm is formed on the scan electrodes. The dielectric layer is required to have excellent transparency and high withstand voltage characteristics. These properties are largely governed by the grade of the dielectric layer, ie, surface smoothness and the state of bubbles within the layer. [0003] As a method for forming such a dielectric layer, a well-known method in the past is a paste dielectric made by mixing powder components such as glass powder and a medium (formed by dissolving thermoplastic resin etc. in a solvent) The forming material (hereinafter referred to as "dielectric-forming paste") is screen-printed and then fi...

AI Technical Summary

Problems solved by technology

[0004] However, the existing pastes for forming dielectrics have disadvantages such as difficulty in forming a smooth coating layer with uniform film thickness, many residual bubbles, and large diameter of residual bubbles, so it is difficult to form a paste with high transparency and withstand voltage performance. Problems with high dielectric layers

Therefore, although it is attempted to improve the quality of the dielectric layer by adjusting the viscosity of the vehicle and its mixing ratio, this method has poor reproducibility and cannot fundamentally solve the above problems.