Electron gun with integral shadow grid

Details Electron gun with integral shadow grid Electron gun with integral shadow grid

H - Electricity

01

J

313/187, 316/47

H01J 1/14 (2006.01) H01J 3/02 (2006.01) H01J 9/04 (2006.01) H01J 23/065 (2006.01)

Patent

CA 2012708

Abstract of the Disclosure A very fine-mesh, non-emissive shadow grid is formed on the smooth emissive surface 16 of a thermionic cathode 12 by deposition from a vapor a continuous layer 22 of non-emissive conductive material. Between the elements 24 of the grid the non-emissive material is removed by bombardment through an apertured mask to restore emissivity between the elevated grid elements 24. 89-05

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