SCANDATE IMPREGNATION TYPE CATHODE AND MANUFACTURE OF CATHODE-RAY TUBE USING IT,申请号JP19960060568-传众专利搜索

SCANDATE IMPREGNATION TYPE CATHODE AND MANUFACTURE OF CATHODE-RAY TUBE USING IT

申请公布号：JPH09259736(A)

申请号：JP19960060568

申请日期：1996.03.18

申请公布日期：1997.10.03

申请人：

HITACHI LTD

发明人：SASAKI SUSUMU;YAGUCHI TOMIO;AMANO ISATO;MATSUZAKI NAOKO;YAMADA EMIKO

分类号：H01J1/14;H01J1/28;H01J9/04;H01J9/44

主分类号：H01J1/14

摘要：PROBLEM TO BE SOLVED: To provide a scandate impregnation type cathode having a coating film in which the breakage and contamination of the coating film hardly occurs, and provide a manufacturing method for a cathode-ray tube using it. SOLUTION: A coating film 1 is formed of nickel and scandium oxide, the product of Sc/Ni element ratio and coating film thickness (unit:nm) of the coating film 1 is set to one or more and less than 20, and film thickness, 100nm or more. The nickel is evaporated by heating at 1050 deg.C to 1200 deg.C after the vacuum exhaust process of a cathode-ray tube. Thereby, since the film is sufficiently thick before the heating of a cathode, the breakage of the coating film hardly occurs, and also the contamination hardly occurs. After the evaporation of the nickel, thin scandium oxide is left on the surface of the cathode so as to obtain an excellent electron emission characteristic.