发明授权
US4053807A Thermionic cathode and heater structure on ceramic base plate 失效
陶瓷基板上的THERMIONIC CATHODE和加热器结构

Thermionic cathode and heater structure on ceramic base plate
摘要:
A thermionic cathode structure includes a ceramic base plate, a heater layer of tungsten coated on the ceramic base plate, a cathode lead layer of tungsten formed on a ceramic insulating layer covering the heater layer, a base metal layer coated on the cathode lead layer, and a cathode material coated on the base metal layer.
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