H - Electricity – 01 – J
Patent
H - Electricity
01
J
316/14, 313/35.1
H01J 29/58 (2006.01) H01J 9/14 (2006.01) H01J 29/81 (2006.01)
Patent
CA 1076190
ABSTRACT: In a colour display tube of the post focusing type the colour selection electrode com- prises a first and a second system of lens elec- trodes. A lens electrode belonging to the first system is connected by means of diffusion bond to one of the metallized sides of an electrically insulating member which is metallized on two sides. A lens electrode belonging to the second system is formed either by the other metallized side of the insulating member or is secured to the other metallized side of the insulating member also by means of a diffusion bond. The colour selection electrode is manufactured by starting from an insu- lating foil which is metallized on two sides and which is connected on the side by a diffusion connection to each lens electrode belonging to the first system and which is provided on the other side with each electrode belonging to the second system, the desired apertures in the colour selec- tion electrode being obtained by locally etching away at least the metallized foil by means of a selective etching process.
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