An analysis of the surface of the Ni–W layer of a tungsten film coating cathode

Superior characteristics of a cathode operated with higher current density are required for achieving higher brightness and higher resolution of CRTs. An improved Sc2O3-dispersed-oxide cathode conventional cathode.with tungsten film coating new cathode.has been developed. The capability of the new cathode for high-current density operation is 1.8 times that of the conventional Sc2O3-dispersed-oxide cathode w1x. Investigation of W behavior as well as typical characteristics of the new cathode in CRTs have been reported. This new type of oxide-coated cathode will contribute to higher brightness and higher resolution of CRTs. q1999 Elsevier Science B.V. All rights reserved.