Cathode ray tube and method of manufacturing a cathode ray tube
AssigneeU.S. Philips Corporation
InventorGerardus A. H. M. Vrijssen
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Abstract
Electrically insulating surfaces of a cathode ray tube are covered with a film of an organic material (211). This improves the high-voltage behavior of the cathode ray tube. The film is applied by a method in which a solution comprising an organic material is applied, which is allowed to dry and is subsequently caused to decompose partly.
Claims33
A cathode ray tube comprising an electron gun, an electrically insulating surface in said cathode ray tube, and an electrically insulating film covering said electrically insulating surface, said electrically insulating film being a degradation product of a layer of an organic material.
A cathode ray tube comprising an electron gun, an electrically insulating surface in said cathode ray tube, and an electrically insulating film of an organic material covering said electrically insulating surface, said electrically insulating film being a thermal decomposition product of a layer of said organic material.
A cathode ray tube comprising an electron gun, an electrically insulating surface in said cathode ray tube, and an electrically insulating film covering said electrically insulating surface, said electrically insulating film being a partly carbonized layer of an organic material.
A method of manufacturing a cathode ray tube comprising the steps of moistening an internal surface of an element of the cathode ray tube with a solution of an organic substance, drying said solution to form an organic layer, and at least partly decomposing said organic layer.
Dependencies are inferred from the claim text.