Cataphoretic process for screening color cathode ray tubes
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United States of America Patent
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Jan 2, 1990
Grant Date -
N/A
app pub date -
Nov 10, 1986
filing date -
Nov 10, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved cataphoretic process is disclosed for use in the manufacture of a color cathode ray tube. The process provides for depositing in sequence on the tube screening surface at least two separate patterns of phosphor elements, with each pattern of elements capable of emitting light of a different color when excited. The process according to the invention comprises first depositing an electrically conductive coating over the screening surface for use as an electrode during each deposition operation. Second, an electrically insulative barrier is deposited over the conductive coating. Portions of the barrier are removed selectively and sequentially for controlling patterned, sequenced cataphoretic access to the electrically conductive coating.
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