OPTICAL SUBSTRATE, SEMICONDUCTOR LIGHT EMITTING DEVICE AND MANUFACTURING METHOD OF THE SAME
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United States of America Patent
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Issued Date -
Feb 25, 2016
app pub date -
Sep 25, 2013
filing date -
Oct 12, 2012
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Abandoned
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Abstract
An optical substrate PP (10) is provided with a substrate body, and a concavo-convex structure (20) comprised of a plurality of convex portions (20a) provided on the main surface of the substrate body, where at least one pattern (X) observable with an optical microscope is drawn on the main surface, an interval of the pattern (X) is larger than a pitch of the concavo-convex structure (20), and in an optical microscope image of the pattern (X), a first region (Xa) is capable of being distinguished from a second region (Xb) by a difference in light and dark, a plurality of first regions (Xa) is arranged apart from one another at intervals, and the second region (Xb) connects between the first regions (Xa), so as to concurrently actualize increases in internal quantum efficiency IQE and improvements in light extraction efficiency LEE of a semiconductor light emitting device which have been mutually tradeoffs.
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