The decline of impregnated cathodes in CRTs
In the 1990s various CRT-companies introduced impregnated cathodes (I-cathodes) in color picture tubes (CPTs) in order to meet the requirements of good life performance at high beam currents. The initially successful introduction of I-cathodes in mass production did not result in a complete change o...
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Veröffentlicht in: | Applied surface science 2005-09, Vol.251 (1), p.139-145 |
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Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | In the 1990s various CRT-companies introduced impregnated cathodes (I-cathodes) in color picture tubes (CPTs) in order to meet the requirements of good life performance at high beam currents.
The initially successful introduction of I-cathodes in mass production did not result in a complete change over; on the contrary, I-cathodes are gradually phased out from CRTs. The reasons are the recent improvements of oxide cathodes, rather high cost of I-cathodes, sensitivity of I-cathodes for ion bombardment and electron optic considerations. |
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ISSN: | 0169-4332 1873-5584 |
DOI: | 10.1016/j.apsusc.2005.03.180 |