| 发明名称 |
Oxide cathode. |
| 摘要 |
<p>The emission properties of oxide cathodes, in which yttrium oxide, scandium oxide or a rare earth oxide is added to the electron-emissive material, are improved by using fine-grained yttrium, scandium or rare earth instead of coarse-grained oxide.</p> |
| 申请公布号 |
EP0395157(A1) |
申请公布日期 |
1990.10.31 |
| 申请号 |
EP19900201001 |
申请日期 |
1990.04.23 |
| 申请人 |
N.V. PHILIPS' GLOEILAMPENFABRIEKEN |
发明人 |
DERKS, PETRUS JACOBUS ANTONIUS MARIA;SMETS, CAROLUS ANTONIUS |
| 分类号 |
H01J1/14;H01J1/144;H01J1/20 |
主分类号 |
H01J1/14 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
