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US 9,484,504 B2Granted
Micro LED with wavelength conversion layer
AssigneeApple Inc.
InventorsAndreas Bibl, Kelly McGroddy
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Abstract
A light emitting device and method of manufacture are described. In an embodiment, the light emitting device includes a micro LED device bonded to a bottom electrode, a top electrode in electrical contact with the micro LED device, and a wavelength conversion layer around the micro LED device. The wavelength conversion layer includes phosphor particles. Exemplary phosphor particles include quantum dots that exhibit luminescence due to their size, or particles that exhibit luminescence due to their composition.
Claims30
A light emitting device comprising:
- an array of bottom electrodes;
- a corresponding array of micro LED devices bonded to the array of bottom electrodes, wherein each micro LED device has a maximum width of 1 μm-100μ, exactly one micro LED device is bonded to a corresponding bottom electrode, and each micro LED device is individually addressable through the corresponding bottom electrode;
- a sidewall passivation layer comprising a cured polymer formed around sidewalls of the array of micro LED devices, and an uppermost level top surface that does not extend above a top surface for each of the micro LED devices;
- one or more top electrode layers that spans over the array of micro LED devices and the level top surface of the sidewall passivation layer and is in electrical contact with the array of the micro LED devices;
- and
- an array of wavelength conversion layers, wherein each wavelength conversion layer is around a corresponding micro LED device and comprises phosphor particles.
3 more elements
Dependencies are inferred from the claim text.