METHOD OF MANUFACTURING A LUMINESCENT SCREEN FOR A CRT

摘要

In an improved method of electrophotographically manufacturing a luminescent screen assembly for a color CRT on an interior surface of a faceplate panel, a volatilizable organic conductive (OC) layer is provided on the interior surface of the panel and a volatilizable organic photoconductive (OPC) layer overlies the OC layer. The method includes the steps of: establishing a substantially uniform electrostatic charge on the OPC layer; exposing selected areas of the OPC layer to visible light to affect the charge thereon; developing the selected areas of the OPC layer with a triboelectrically charged, dry-powdered, first color-emitting phosphor; sequentially repeating the charging, exposing and developing sequence for triboelectrically charged, dry-powdered, second and third color-emitting phosphors to form a luminescent screen comprising picture elements of triads of color-emitting phosphors; fixing the phosphors to the underlying OPC layer with a suitable fixative; filming the phosphors; and aluminizing the filmed phosphors. The improvement comprises the fixing step utilizing an electrostatic spray to uniformly contact the phosphors and the underlying OPC layer with the fixative, without moving the phosphors.