发明名称 |
Small electron gun |
摘要 |
<p>To provide a small electron gun capable of keeping a high vacuum pressure used for an electron microscope and an electron-beam drawing apparatus. An electron gun constituted by a non-evaporative getter pump, a heater, a filament, and an electron-source positioning mechanism is provided with an opening for rough exhausting and its automatically opening/closing valve, and means for ionizing and decomposing an inert gas or a compound gas for the non-evaporative getter pump. It is possible to keep a high vacuum pressure of 10-8 Pa without requiring an ion pump by using a small electron gun having a height and a width of approximately 15 cm while emitting electrons from the electron gun.
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申请公布号 |
EP1515358(A3) |
申请公布日期 |
2010.11.17 |
申请号 |
EP20040015558 |
申请日期 |
2004.07.01 |
申请人 |
HITACHI HIGH-TECHNOLOGIES CORPORATION |
发明人 |
KATAGIRI, SOICHI;OHSHIMA, TAKASHI |
分类号 |
H01J37/18;H01J7/16;H01J7/18;H01J37/07;H01J37/073;H01J41/20 |
主分类号 |
H01J37/18 |
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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