Micro-transfer printed LED and color filter structures
Abstract:
A micro-transfer printed intermediate structure comprises an intermediate substrate and one or more pixel structures disposed on the intermediate substrate. Each pixel structure includes an LED, a color filter, and a fractured pixel tether physically attached to the pixel structure. A fractured intermediate tether is physically attached to the intermediate substrate. A method of making an intermediate structure source wafer comprises providing a source wafer having a patterned sacrificial layer including sacrificial portions separated by anchors, disposing an intermediate substrate over the patterned sacrificial layer, and disposing one or more pixel structures on the intermediate substrate entirely on or over each sacrificial portion. Each pixel structure includes an LED, a color filter, and a fractured pixel tether physically attached to the pixel structure to form an intermediate structure.
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