Abstract
We have developed methods for creating microscale inorganic light-emitting
diodes (LEDs) and for assembling and interconnecting them into unusual
display and lighting systems. The LEDs use specialized epitaxial
semiconductor layers that allow delineation and release of large
collections of ultrathin devices. Diverse shapes are possible, with
dimensions from micrometers to millimeters, in either flat or "wavy"
configurations. Printing-based assembly methods can deposit these
devices on substrates of glass, plastic, or rubber, in arbitrary
spatial layouts and over areas that can be much larger than those
of the growth wafer. The thin geometries of these LEDs enable them
to be interconnected by conventional planar processing techniques.
Displays, lighting elements, and related systems formed in this manner
can offer interesting mechanical and optical properties.
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