Light emitting device having micro epitaxial structures and manufacturing method thereof
First Claim
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1. A light emitting device, comprising:
- a first substrate;
a second substrate, disposed opposite to the first substrate; and
a plurality of micro epitaxial structures, periodically disposed on the first substrate and bonded with the second substrate via a thermocompression bonding method, wherein a coefficient of thermal expansion of the first substrate is CTE1, a coefficient of thermal expansion of the second substrate is CTE2, a side length of each of the micro epitaxial structures is W, W ranges from 1 to 100 micrometers, and a pitch of any two adjacent micro epitaxial structures is P, wherein W/P=0.1 to 0.95, and CTE2/CTE1=0.8 to 1.2;
a first bonding layer, disposed between the micro epitaxial structures and the second substrate, and the second substrate is fixed on the first substrate through the first bonding layer;
a second bonding layer, disposed between the micro epitaxial structures and the first substrate, and the micro epitaxial structures are fixed on the first substrate through the second bonding layer; and
wherein a side of each of the micro epitaxial structures directly contacts the first bonding layer, and the second bonding layer encapsulates each of the micro epitaxial structures.
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Abstract
A light emitting device includes a first substrate, a second substrate and a plurality of micro epitaxial structures. The second substrate is disposed opposite to the first substrate. The micro epitaxial structures are periodically disposed on the substrate and located between the first substrate and the second substrate. A coefficient of thermal expansion of the first substrate is CTE1, a coefficient of thermal expansion of the second substrate is CTE2, a side length of each of the micro epitaxial structures is W, W is in the range between 1 micrometer and 100 micrometers, and a pitch of any two adjacent micro epitaxial structures is P, wherein W/P=0.1 to 0.95, and CTE2/CTE1=0.8 to 1.2.
15 Citations
13 Claims
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1. A light emitting device, comprising:
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a first substrate; a second substrate, disposed opposite to the first substrate; and
a plurality of micro epitaxial structures, periodically disposed on the first substrate and bonded with the second substrate via a thermocompression bonding method, wherein a coefficient of thermal expansion of the first substrate is CTE1, a coefficient of thermal expansion of the second substrate is CTE2, a side length of each of the micro epitaxial structures is W, W ranges from 1 to 100 micrometers, and a pitch of any two adjacent micro epitaxial structures is P, wherein W/P=0.1 to 0.95, and CTE2/CTE1=0.8 to 1.2;a first bonding layer, disposed between the micro epitaxial structures and the second substrate, and the second substrate is fixed on the first substrate through the first bonding layer; a second bonding layer, disposed between the micro epitaxial structures and the first substrate, and the micro epitaxial structures are fixed on the first substrate through the second bonding layer; and wherein a side of each of the micro epitaxial structures directly contacts the first bonding layer, and the second bonding layer encapsulates each of the micro epitaxial structures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A manufacturing method of a light emitting device, comprising:
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providing a first substrate, a coefficient of thermal expansion of the first substrate being CTE1, and the first substrate having a plurality of micro epitaxial structures periodically fixed on the first substrate through an adhesive layer, wherein the adhesive layer fills up gaps between micro epitaxial structures, wherein a side length of each of the micro epitaxial structures is W, W ranges from 1 to 100 micrometers, a pitch of any two adjacent micro epitaxial structures is P, and W/P=0.1 to 0.95; providing a bonding material covered on the micro epitaxial structures via a film coating method on the first substrate; disposing a second substrate opposite to the first substrate, the micro epitaxial structures being located between the first substrate and the second substrate, and the second substrate being bonded with the micro epitaxial structures through the bonding material via a thermocompression bonding method, wherein a coefficient of thermal expansion of the second substrate is CTE2, and CTE2/CTE1=0.8 to 1.2; and separating the first substrate from the micro epitaxial structures. - View Dependent Claims (10, 11, 12, 13)
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Specification