Sealing strip for sealing base plate of flat panel display screen and method for preparing same

Abstract

The invention relates to a sealing strip for sealing front and back base plates of a flat panel display screen. The sealing strip is prepared from the following raw materials: a first composition which consists of 70 to 90 percnet of PbO, 9 to 20 percent of B2O3 and 1 to 10 percent of BioO3 according to weight percentage, a second composition which consists of 80 to 90 percent of PbT1O3 and 10 to20 percent of Fe2O3.Cr2O3.1 / 2C0O according to weight percentage, and a solvent. The invention also relates to a method for preparing the sealing strip. When the sealing strip is used for sealing the front and back base plates of the displayer screen, the method and the sealing strip have the advantages of easy and convenient operation and easy size control.

Description

technical field [0001] The invention relates to the field of flat panel display manufacturing. Specifically, the present invention relates to an application strip for sealing the front and rear substrates of a flat panel display and products for realizing the method. Background technique [0002] At present, the general-purpose AC gas discharge plasma display panel (Plasma Display Panel, PDP) adopts a surface discharge structure, including a front substrate and a rear substrate sealed with it. The front substrate is equipped with transparent electrodes ITO and bus electrodes, transparent The electrodes and the bus electrodes constitute discharge electrodes. The discharge electrodes include sustain discharge electrodes X and scan / sustain discharge electrodes Y. The surface of the discharge electrodes is covered with a dielectric layer, and the dielectric layer is covered with a dielectric protection layer. Addressing electrodes perpendicular to the discharge electrodes are a...

AI Technical Summary

Problems solved by technology

The former requires bulky and expensive special equipment, and the process includes: when sealing, it is necessary to carry out the proportioning of low-melting glass paste (for example: 300g of dry low-melting glass powder and 25 ± 2g of isoamyl acetate). Pour the slurry into the low-melting glass slurry storage tank, place the front and rear substrates on the coating table for position adjustment, apply the low-melting glass slurry on the four sides of the front and rear substrates, and use low-melting glass around the vent holes. Coating of melting point glass paste, standing still until the sealing line of low melting point glass powder is dry, repairing the four corners, drying with a special drying oven, and inspecting with an appearance inspection machine. The process is very cumbersome and requires temperature 22~23℃, humidity 55±5%RH, cleanliness level 1000, measure the height of the sealing frame of the low glass powder (the coating height requirement is 400+10% / -5%um), and the obtained sealing edge width Larger, and the sealing edge is uneven, not very beautiful; the latter has a complicated operation process, requires multiple printings, multiple baking, the processing cycle is too long, and the airtightness is poor, and the prepared display panel is prone to air leakage

The whole process uses a lot of equipment and requires high precision, and the slurry prepared from commercially available common low-melting point glass powder not only has poor sealing performance, but also has a large fluidity, so it is easy to produce defective products

[0004] In addition, in order to effectively improve the airtight performance when sealing the front substrate and the rear substrate, manufacturers generally increase the thickness of the sealing layer to solve the problem. At the same time, the greater fluidity also makes the sealing position, width, height, Shape is difficult to fully control, necessitating inspection procedures

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