散至导电基底接触面上 back contact
光阴极由衬底(包括介质阴极的导电基底)和光电发射膜构成。
The photocathode consists of a substrate (involving a conductive base film for dielectric cathode) and a photoemission film.
利用解析方法导出了垂直电偶极子在涂覆有介质层的球形导电基底上产生的电磁场的解析表达式。
The analytical expressions of electromagnetic fields of a vertical electric dipole (VED) over a spherical conductor covered by a dielectric layer have been developed in this paper.
结果表明：钛酸铝陶瓷板镀二氧化铅基底耐蚀性好，且质量轻，比表面积大，是一种理想的正极板导电基底材料。
The results show that this ceramic plate has good corrosion resistance, small mass and big specific area. It is an ideal underground material of positive plate.
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