| 发明名称 |
ELECTRON PROBE FORMING SYSTEM |
| 摘要 |
An electron gun comprising an electron source and an anode which together can produce a beam of electrons and which are both disposed substantially within a lens which serves to help focus the electron beam.
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| 申请公布号 |
US3728570(A) |
申请公布日期 |
1973.04.17 |
| 申请号 |
USD3728570 |
申请日期 |
1971.11.18 |
| 申请人 |
DEPARTMENT OF ENG UNIVERSITY OF CAMBRIDGE,GB |
发明人 |
SMITH K,US;SWANN D,US |
| 分类号 |
H01J37/073;(IPC1-7):H01J1/30 |
主分类号 |
H01J37/073 |
| 代理机构 |
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代理人 |
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| 地址 |
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