Electron source
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United States of America Patent
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May 7, 2013
Grant Date -
Apr 15, 2010
app pub date -
May 13, 2008
filing date -
May 16, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is an electron source which provides a stable electron beam even when vibration is applied from external to a device which uses the electron source. The electron source is provided with a needlelike chip (1) having an electron emitting section at one end; a cup-like component (6) bonded to the other end of the needlelike chip (1); and a filament (3) for heating the cup-like component (6). The filament (3) is arranged in a gap inside the cup-like component (6), in a noncontact state to the cup-like component (6).
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