MANUFACTURE OF PICKUP TUBE

PURPOSE:To make a face plate having small leak resistance usable as a resistor with the desired resistance value by interposing a plasma treatment process when a chrome layer is metallized on a transparent conductive film of the face plate for improving a residual image characteristic of a pickup tu...

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Bibliographic Details
Main Authors SHIIBA ITARU, KUNIYASU HIROYUKI, SASANO AKIRA
Format Patent
LanguageEnglish
Published 12.06.1984
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
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Summary:PURPOSE:To make a face plate having small leak resistance usable as a resistor with the desired resistance value by interposing a plasma treatment process when a chrome layer is metallized on a transparent conductive film of the face plate for improving a residual image characteristic of a pickup tube. CONSTITUTION:For improving a residual image characteristic of a pickup tube, a chrome layer 1 is metallized on a transparent conductive film 2 of a face plate 3 with the desired thickness to be made into chrome oxide while being left in the atmospheric environment containing oxygen, in order to obtain the desired leak resistance. At this time, the leak resistance slowly rises due to the process of leaving the chrome layer as it is, yet the face plate, whose resistance can not reach the desire value, after being left as it is for the prescribed time, shall be forced to undergo plasma washing in order to raise the leak resistance about one place while forcedly oxidizing the chrome layer so as to obtain the desired resistance value. Accordingly, the face plate, whose leak resistance has dropped to the unusably low level, can be reclaimed in a short time by a simple operation to make it usable again.
Bibliography:Application Number: JP19820211282