Process for forming a phosphor

Details Process for forming a phosphor Process for forming a phosphor

G - Physics

21

K

G21K 4/00 (2006.01) G01T 1/20 (2006.01) H01L 31/115 (2006.01)

Patent

CA 2128746

A process for forming a phosphor comprising the steps of: (a) providing a substrate for deposition and growth of an alkali halide phosphor, (b) forming a patterned surface on the substrate comprising a plurality of mesas, each of the mesas having an incline, a decline, and a horizontal surface, the mesas being separated from one another by horizontal segments of the substrate and wherein: (i) the ratio of the height of each of the mesas to the width of the horizontal segments is in the range of about 1:20 to 1:4; (ii) the ratio of the width of each of the mesas to the width of the horizontal segments is in the ratio of about 1:30 to 1:4; and (iii) the angles of incline and decline of each of the mesas are between about 5° to 85°; and (c) depositing an alkali halide phosphor on the patterned surface of the substrate of step (b), thereby forming cracks, in the deposited phosphor, originating from the inclines and/or declines of each of the mesas.

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