发明名称 |
Cold-cathode electron source, microwave tube using it, and production method thereof |
摘要 |
A cold-cathode electron source is formed that successfully achieves a high frequency and a high output. Embodiments include a cold-cathode electron source comprising emitters having a tip portion tapered at an aspect ratio R of not less than 4, thereby decreasing capacitance between the emitters and a gate electrode by a degree of declination from the gate electrode, such that the cold-cathode electron source is able to operate at a high frequency. Embodiments also include a cold-cathode electron source formed of a diamond with a high melting point and a high thermal conductivity, such that the emitters operate at a high current density and at a high output.
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申请公布号 |
US7391145(B2) |
申请公布日期 |
2008.06.24 |
申请号 |
US20050211665 |
申请日期 |
2005.08.26 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
TATSUMI NATSUO;IMAI TAKAHIRO |
分类号 |
H01J1/304;H01J3/02;H01J9/02;H01J23/04;H01J23/06 |
主分类号 |
H01J1/304 |
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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