Indium seal type luminescent screen, and technique for preparing the display tube of using the luminescent screen

Abstract

The indium seal type fluorescent screen includes optical fiber faceplate and metal seal ring. Characters are that groove for filling indium is setup on the metal seal ring; clip body is setup on edge of the optical fiber faceplate; through indium solder filled inside the groove, the clip body is connected and sealed to the metal seal ring. Procedure for preparing image tube of using the fluorescent screen includes steps: fabricating metal seal ring; molding optical fiber faceplate, and process for metallizing the clip body; filling indium into the groove on the ring; sealing faceplate and the ring by using indium; fusion welding the indium-sealed ring of the faceplate and shell of tube so as to form the shell of tube, which is sealed to light cathode. Advantages are: cold and heat shock resistance, high intensity mechanical shock resistant, higher stability and service life, carrying out sealing light cathode and shell of tube at same time so as to simplify technical procedure.

Description

technical field [0001] The invention relates to a photoelectric vacuum device, in particular to an indium-sealed fluorescent screen of a picture tube and a preparation process of a picture tube using the fluorescent screen. Background technique [0002] The fluorescent screen of the existing image tube is sealed with metal materials with low glass powder, which has the following disadvantages: firstly, corresponding treatment needs to be carried out on the corresponding metal materials, such as burning hydrogen, roughening, etc., the procedure is complicated, and sealing The temperature is strictly controlled, the requirements for the process conditions are relatively high, and it is not easy to operate; secondly, the product quality is not high, and the high storage, low storage, high and low temperature cycles and stress tests show that the performance in adapting to environmental conditions is not high; thirdly, the original During the soldering process, the phosphor scre...

AI Technical Summary

Problems solved by technology

[0002] The fluorescent screen of the existing image tube is sealed with metal materials with low glass powder, which has the following disadvantages: firstly, corresponding treatment needs to be carried out on the corresponding metal materials, such as burning hydrogen, roughening, etc., the procedure is complicated, and sealing The temperature is strictly controlled, the requirements for the process conditions are relatively high, and it is not easy to operate; secondly, the product quality is not high, and the high storage, low storage, high and low temperature cycles and stress tests show that the performance in adapting to environmental conditions is not high; thirdly, the original During the welding process, the fluorescent screen with low glass sealing is easy to be affected by the welding temperature, so that the low glass sealing cannot withstand the heat conduction, which leads to stress changes and air leakage

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