Light emitting device and method of manufacturing the same
First Claim
1. A light emitting device comprising:
- a supporting base having a projection on its top face;
a first light emitting element disposed in a region in which the projection is not formed in the top face;
a second light emitting element disposed on the first light emitting element and the projection;
one or plural pad electrodes each having a first connection face electrically connected to the second light emitting element and a second connection face electrically connected to an external conductive member and formed on the top face of the projection; and
an extraction electrode formed in a region in which the projection is not formed in the top face and electrically connected to the first light emitting element.
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Accused Products
Abstract
The present invention provides a light emitting device solving weakness caused by bonding between first and second light emitting elements and a method of manufacturing the same. A chip-shaped first light emitting element and a second light emitting element overlapped each other are disposed on a supporting base. Four island-shaped projections are provided on the top face of the supporting base, and support the second light emitting element. The projections are formed by wet-etching or dry-etching the supporting base, and a pad electrode is provided on the top face of the projection. The pad electrode is electrically connected to the second light emitting element and is also electrically connected to a wire.
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Citations
19 Claims
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1. A light emitting device comprising:
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a supporting base having a projection on its top face; a first light emitting element disposed in a region in which the projection is not formed in the top face; a second light emitting element disposed on the first light emitting element and the projection; one or plural pad electrodes each having a first connection face electrically connected to the second light emitting element and a second connection face electrically connected to an external conductive member and formed on the top face of the projection; and an extraction electrode formed in a region in which the projection is not formed in the top face and electrically connected to the first light emitting element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A light emitting device comprising:
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a conductive supporting base having a projection on its top face; a first light emitting element disposed in a region in which the projection is not formed in the top face; a second light emitting element disposed on the first light emitting element and the projection; one or plural pad electrodes each having a first connection face electrically connected to the second light emitting element and a second connection face electrically connected to an external conductive member and formed on the top face of the projection; and an extraction electrode formed on a rear face of the supporting base and electrically connected to the supporting base.
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16. A method of manufacturing a light emitting device comprising the steps of:
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preparing a supporting base having a projection on its top face, a first light emitting element, and a second light emitting element whose horizontal width is larger than that of the first light emitting element; forming one or plural pad electrodes each having, on the top face of the projection, a first connection face electrically connected to the second light emitting element and a second connection face electrically connected to an external conductive member; forming a mount electrode for mounting the first light emitting element and an extraction electrode electrically connected to the mount electrode in a region in which the projection is not formed in the top face; and disposing the first light emitting element on the mount electrode and disposing the second light emitting element on the first light emitting element and the first connection face. - View Dependent Claims (17, 18)
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19. A method of manufacturing a light emitting device comprising the steps of:
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preparing a conductive supporting base having a projection on its top face, a first light emitting element, and a second light emitting element whose horizontal width is larger than that of the first light emitting element; forming one or plural pad electrodes each having, on the top face of the projection, a first connection face electrically connected to the second light emitting element and a second connection face electrically connected to an external conductive member; forming a mount electrode for mounting the first light emitting element in a region in which the projection is not formed in the top face; forming, on a rear face of the supporting base, an extraction electrode electrically connected to the supporting base; and disposing the first light emitting element on the mount electrode and disposing the second light emitting element on the first light emitting element and the first connection face.
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Specification