Method for manufacturing front panel of plasma display screen

Abstract

The invention discloses a method for manufacturing a front panel of a plasma display screen. The method comprises the following steps: directly evaporating a Cr / Cu / Cr layer after an ITO (indium tin oxide) film is evaporated; carrying out exposure once, developing once and etching once to obtain a pattern provided with an ITO electrode and a Cr / Cu / Cr electrode; and etching once with different solution, thus the electrode is manufactured, wherein the technical effect in the prior art can be achieved by controlling the etching speed of each coating. The invention has the beneficial effects that: four working procedures are reduced, equipment and materials for the four working procedures can be saved; meanwhile one-step etching of the ITO electrode and the Cr / Cu / Cr electrode is realized, and the yield of the working procedure is improved; one master mask is adopted to solve the problem that the accuracy of aligning the manufactured ITO electrode and the accuracy in a BUS electrode exposure process are poor as two master masks are adopted in the prior art, thus the side effect caused by aligning error and the display quality of the display screen is improved.

Description

technical field [0001] The invention relates to a method for manufacturing a plasma display screen, in particular to a method for manufacturing a front panel of a plasma display screen. Background technique [0002] At present, the mainstream plasma display screens all adopt a three-electrode surface discharge structure, which is mainly made of various graphics on the front panel and the rear panel, and finally the display screen is formed by sealing and arranging. ITO electrodes and BUS electrodes are made on the front panel, and then a transparent dielectric layer is made on the electrodes, and then a MgO layer is vapor-deposited on the dielectric layer. On the rear panel, there are ADD electrodes perpendicular to the discharge electrodes on the front panel. After the ADD electrodes are sintered, the rear dielectric is made on it, and then the RIB slurry is coated on the rear dielectric. After drying, filming, exposure, development, spraying Sand to form RIB graphics, and...

AI Technical Summary

Problems solved by technology

[0011] In the production of products, such a process technology not only takes a long time, but also requires repeated exposure and development and then etching to obtain ITO electrode patterns and BUS electrode patterns; it also causes great waste in the application of equipment and materials. Two exposure equipment, two development and drying equipment are required, and repeated washing processes cause waste of equipment. In terms of materials, Pr glue must be repeatedly coated twice, and the same concentration of developer is used for development, resulting in the use of materials. It is a great waste; at the same time, when the BUS electrode is exposed, it must be accurately aligned with the already produced ITO electrode. With the improvement of the resolution of the display screen, the requirements for alignment are becoming more and more accurate, and the requirements for equipment are also becoming more and more accurate. , the production is also more difficult. If there is a large alignment deviation between the ITO and BUS electrodes, it will cause a decrease in the yield rate; the alignment deviation will also easily cause the position deviation of the produced electrodes and black bar graphics to affect the brightness and contrast of the display screen. The voltage characteristics also affect the characteristics of the display screen, which makes the display quality worse, the picture quality is poor, and the light emission efficiency of the screen will be reduced accordingly.

To sum up, the existing technological process is cumbersome, and the equipment input cost and material consumption cost are high, resulting in high production cost of the front panel, which leads to high production cost of the display screen and low production efficiency

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