发明名称 |
Field emission electron gun |
摘要 |
A field emission gun in which a field emission tip for generating charged particles is axially aligned with apertures in an intermediate electrode and a main electrode. A field electrode is placed in juxtaposition to the field emission tip for developing a particle generation field. This electrode is located relative to the field emission tip and the intermediate electrode to effect a predetermined focal distance and level of electron beam intensity. Use of a field electrode permits utilization of lower focusing and acceleration voltages and renders the device less sensitive to variations in field emission tip design and performance.
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申请公布号 |
US3931517(A) |
申请公布日期 |
1976.01.06 |
申请号 |
US19750537880 |
申请日期 |
1975.01.02 |
申请人 |
AMERICAN OPTICAL CORPORATION |
发明人 |
COATES, VINCENT J.;WELTER, LEONARD M. |
分类号 |
H01J37/073;(IPC1-7):H01J37/28 |
主分类号 |
H01J37/073 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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