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US 5,294,368 AGranted
Method of making a composite electroluminescent phosphor
AssigneeOsram Sylvania Inc.
InventorsRonald E. Karam, Richard G. Gingerich
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Abstract
Composite electroluminescent phosphor particles may be made by forming, on a substrate, a composite layer comprising at least one layer of a dielectric or conductive material and at least one layer of an electroluminescent phosphor, physically removing the composite layer from the substrate, and pulverizing the composite layer to obtain composite electroluminescent phosphor particles.
Claims7
A method of making composite electroluminescent phosphor particles, comprising the steps of:
- a) forming a composite layer on a substrate, said composite layer comprising at least one layer of a dielectric or conductive material having a thickness of between about 5 and 20 micrometers and at least one layer of an electroluminescent phosphor having a thickness of less than about 0.5 micrometers;
- b) physically separating said composite layer from said substrate;
- and
- c) pulverizing said composite layer to obtain composite electroluminescent phosphor particles.
1 more element
Dependencies are inferred from the claim text.