Direct heating cathode and process for producing such
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United States of America Patent
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Jun 30, 1998
Grant Date -
N/A
app pub date -
Nov 30, 1995
filing date -
Dec 28, 1994
priority date (Note) -
Expired
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Abstract
A direct heating cathode for electron guns and a process for producing such a cathode are disclosed. The above direct heating cathode achieves a high current density, extends the expected life span and simplifies the cathode producing process. In the process for producing the above cathode, powdered iridium (Ir) as a basic ingredient is mixed with powdered cerium (Ce) as a subsidiary ingredient at a given mixing ratio into a powdered metal mixture. The powdered metal mixture in turn is applied with a mechanical impact through high energy ball milling, thereby being mechanically alloyed into alloy powder. The alloy powder is compressed with a given pressure, thereby being formed into an alloy pellet. The alloy pellet in turn is heated to remove residual gases from the pellet. Thereafter, the electron emitting performance of the pellet is tested.
First Claim
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- SAMSUNG DISPLAY DEVICES CO., LTD.
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Choi, Jong-Seo | Suwon, KR | 85 | 413 |
Choi, Kwi-Seuk | Suwon, KR | 10 | 53 |
Joo, Kyu-Nam | Suwon, KR | 70 | 379 |
Kim, Geun-Bae | Suwon, KR | 53 | 823 |
Lee, Kwang-Min | Suwon, KR | 27 | 159 |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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