Method of manufacturing cathode structure and color cathode ray tube
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United States of America Patent
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Issued Date -
Feb 27, 2003
app pub date -
Aug 20, 2002
filing date -
Aug 21, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A mixed body made of at least nickel powder and electron emission agent powder is sintered through a hot isostatic pressing process to form a sintered body, and a cathode pellet is formed from the sintered body. Then, the cathode pellet Is inserted into a cup. Then, the cathode pellet and the cup are clamped between upper and lower welding electrodes each having approximately the same diameter as the cathode pellet, and the cathode pellet and the cup are subjected to resistance welding in this clamped state. Then, an assembly of the cathode pellet and the cup is inserted and fixed in an end portion of a sleeve, and a heater is inserted into the sleeve.
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