METHOD OF MAKING A LIGHT EMITTING DIODE ARRAY ON A BACKPLANE
First Claim
1. A method of forming an integrated light emitting device assembly, comprising:
- forming first conductive bonding structures on a top side of a backplane;
disposing an assembly comprising a first transfer substrate and first light emitting devices that emit light of a first wavelength on the backplane, wherein a first subset of the first light emitting devices contacts the first conductive bonding structures and a second subset of the first light emitting devices does not contact any conductive bonding structure;
bonding the first subset of the first light emitting devices to the first conductive bonding structures; and
separating an assembly comprising the first transfer substrate and the second subset of the first light emitting devices from the backplane while the first subset of the first light emitting devices remains bonded to the first conductive bonding structures.
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Accused Products
Abstract
A backplane optionally having stepped horizontal surfaces and optionally embedding metal interconnect structures is provided. First conductive bonding structures are formed on first stepped horizontal surfaces. First light emitting devices on a first transfer substrate are disposed on the first conductive bonding structures, and a first subset of the first light emitting devices is bonded to the first conductive bonding structures. Laser irradiation can be employed to selectively disconnect the first subset of the first light emitting devices from the first transfer substrate while a second subset of the first light emitting devices remains attached to the first transfer substrate. Additional devices on each additional transfer substrate can be bonded to additional conductive bonding structures on the backplane employing the same method provided that the additional devices are not present in positions that would overlap with pre-existing first light emitting devices or devices on the backplane at a bonding position.
37 Citations
57 Claims
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1. A method of forming an integrated light emitting device assembly, comprising:
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forming first conductive bonding structures on a top side of a backplane; disposing an assembly comprising a first transfer substrate and first light emitting devices that emit light of a first wavelength on the backplane, wherein a first subset of the first light emitting devices contacts the first conductive bonding structures and a second subset of the first light emitting devices does not contact any conductive bonding structure; bonding the first subset of the first light emitting devices to the first conductive bonding structures; and separating an assembly comprising the first transfer substrate and the second subset of the first light emitting devices from the backplane while the first subset of the first light emitting devices remains bonded to the first conductive bonding structures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of forming at least one integrated light emitting device assembly, comprising:
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disposing a first assembly comprising a first source substrate and first light emitting devices that emit light of a first wavelength over a backplane, wherein first conductive bonding structures are disposed between the backplane and the first assembly; bonding a first subset of the first light emitting devices to the backplane through the first conductive bonding structures; detaching the first subset of the first light emitting devices from the first source substrate by laser ablation of material portions overlying the first subset of the first light emitting devices; and separating an assembly comprising the first source substrate and a second subset of the first light emitting devices from the backplane while the first subset of the first light emitting devices remains bonded to the backplane. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57)
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Specification