Electric lamp or space discharge component or device manufacturi – Process – Electrode making
Patent
1993-03-25
1994-03-08
Ramsey, Kenneth J.
Electric lamp or space discharge component or device manufacturi
Process
Electrode making
148287, 445 58, C23C 810
Patent
active
052922740
ABSTRACT:
The magnetic performance of a color CRT is optimized by firing ferromagnetic components thereof in an exothermic atmosphere to anneal the components and form a stable black iron oxide layer on a surface thereof. The components are introduced into a furnace having such an atmosphere and the components are heated to a temperature sufficient to initiate pre-oxidation of the surface thereof. The temperature is then increased to optimize the magnetic characteristics of the components and at least partially relieve stress therein. The components are next cooled to a temperature at which the thickness of the stable black oxide layer on the surface of the components is optimized. A CRT is manufactured according to the process described above.
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D'Amato Ralph J.
Mutso Rein R.
Coughlin Jr. Vincent J.
Irlbeck Dennis H.
Ramsey Kenneth J.
Thomson Consumer Electronics Inc.
Tripoli Joseph S.
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