Electron source, method for manufacturing same, emitter, and device including same
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United States of America Patent
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Feb 27, 2024
Grant Date -
Jul 6, 2023
app pub date -
Apr 14, 2021
filing date -
Apr 21, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
An electron source according to the present disclosure includes a columnar portion made of a first material having an electron emission characteristic; and a tubular portion that is disposed to surround the columnar portion and made of a second material having a higher work function than the first material, wherein a hole that extends in a direction from one end face toward the other end face and has a substantially circular cross-sectional shape is formed in the tubular portion, and the columnar portion has a substantially triangular or substantially quadrangular cross-sectional shape and is fixed to the tubular portion in an abutting engagement with an inner surface of the hole.
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