专利名称：CATHODE-RAY TUBE
发明人：DEYAMA SADAO,HIRASAWA SHIGEMI,KUBO TADAO,TOMITA YOSHIFUMI,YAMAMOTO
TOSHIYA,SAKAI KOICHI
申请号：JP1764285
申请日：19850131
公开号：JPS61179044A
公开日：
19860811
专利内容由知识产权出版社提供
摘要：PURPOSE:To reduce the value of a spark current by forming a conductive inner film which is formed in the inner surface of a tube for connecting the portion between a high tension conductor and the contact of an electron gun in which the resistivity and the surface roughness of the film are limited over the characteristic value. CONSTITUTION:A high tension voltage is applied to an electron gun 7 mounted within the neck portion 1 of a cathode-ray tube from a high tension conductor 4 through a conductive film 5 which is provided in the inner surface of a cone portion 2. At this time, the resistivity of the film 5 is formed to be over , and the surface roughness of the film 5 is formed to be over 6mu, and the resistance value between the high tension conductor 4 and the electron gun 7 is formed to be 2-100KOMEGA. And by limiting the surface roughness, the evaporating film of metal barium such as barium getter and the like is made to have discontinuity property and thus to prevent the resistance of the film 5 from lowering, and further by limiting the resistivity, a spark current is restrained under about 200A. Accordingly, it is possible to prevent obstacles accompanied by the spark without making the film 5 high resistance.
申请人：HITACHI POWDERED METALS CO LTD,HITACHI LTD 更多信息请下载全文后查看
