Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1986-11-10
1990-01-02
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
2041815, 2041817, 313470, 313472, 313473, C25D 1302
Patent
active
048911100
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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Sadowsky, Meier, "The Preparation of Luminescent Screens", R.C.A. Laboratories, Princeton, New Jersey, pp. 119-120.
Libman Philomena C.
Prazak, III Charles J.
Hsing Ben C.
Niebling John F.
Zenith Electronics Corporation
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