Electrical characteristics of La0.5Sr0.5CoO3 as a cathode

Abstract

AbstractLa0.5Sr0.5CoO3 was employed as a cathode for the first time when a plasma display panel was used on a handheld personal computer. It has favorable sputtering resistance characteristics and stable discharge characteristics in gases. In this report, the electrical characteristics of La0.5Sr0.5CoO3 are investigated through an analysis of a DC plasma panel fabricated as a prototype. The dimensions of the test plasma panel were measured exactly by an end‐measuring machine, and its electrical properties were estimated. In the analysis of the DC plasma panel, LaB6 and metallic Ni cathodes were investigated in the same way, and a comparative analysis was carried out. In the analysis of a sputtering experiment conducted in an AC sputtering apparatus, the sputter rate of La0.5Sr0.5CoO3 was greater than that of LaB6, and the sputter rate of La0.5Sr0.5CoO3 used as a cathode was smaller than that of other materials. La0.5Sr0.5CoO3 has a greater secondary‐emission coefficient γ than LaB6 or metallic Ni. It is inferred that the greater secondary‐emission coefficient γ of La0.5Sr0.5CoO3 reduces the sputter rate when it is used as a cathode. © 2011 Wiley Periodicals, Inc. Electron Comm Jpn, 94(5): 55–62, 2011; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.10175