학술논문
Dispenser cathode for a grid-controlled electron tube and method of manufacturing same
Document Type
Patent
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Abstract
A dispenser cathode for a grid-controlled electron tube in which the emission of surface regions immediately opposite the control grid is reduced by providing projections above the emissive surface of fused, pore-closing portons which have a focussing effect. These projections may be formed by electron beam or laser beam welding.