Light emitting device and manufacturing method for light emitting device
A light emitting device includes: a base including: a first lead including: a first A surface, a first B surface opposite to the first A surface, and a first C surface located between the first A surface and the first B surface and defining at least one first protrusion, a second lead separated from the first lead, and a resin body covering the first C surface and holding the first lead and the second lead; a light emitting element disposed on the first A surface; and a protecting member disposed continuously on at least a portion of the first A surface and in at least a portion of a gap between the first protrusion and the resin body. In a cross-sectional view, the first protrusion extends from a first end portion of the first A surface at a second lead side toward the second lead.
1. A light emitting device comprising:
a base comprising:
a first lead including:
a first A surface,
a first B surface opposite to the first A surface, and
a first C surface located between the first A surface and the first B surface and defining at least one first protrusion,
a second lead separated from the first lead, and
a resin body covering the first C surface and holding the first lead and the second lead;
a light emitting element disposed on the first A surface; and
a protecting member disposed continuously on at least a portion of the first A surface and in at least a portion of a gap between the first protrusion and the resin body, wherein,
in a cross-sectional view, the first protrusion extends from a first end portion of the first A surface at a second lead side toward the second lead,
the protecting member covers at least a portion of each of a plurality of lateral surfaces of the light emitting element, and
a maximum thickness of a portion of the protecting member covering the lateral surfaces of the light emitting element is greater than an average thickness of a portion of the protecting member covering the first A surface at a position apart from the light emitting element.
2. The light emitting device according to claim 1 , wherein:
in the cross-sectional view, the first protrusion extends from a second end portion of the first B surface at the second lead side toward the second lead.
3. The light emitting device according to claim 2 , wherein:
in the cross-sectional view, a distance between the first end portion and the second lead is less than a distance between the second end portion and the second lead.
4. The light emitting device according to claim 1 , wherein:
a surface of the first protrusion extending from the first end portion to a tip portion of the first protrusion includes a curved surface that is concavely curved toward the first B surface.
5. The light emitting device according to claim 1 , wherein:
the maximum thickness of the portion of the protecting member covering the lateral surface of the light emitting element is in a range of five times to 50 times the average thickness of the portion of the protecting member covering the first A surface at the position apart from the light emitting element.
6. The light emitting device according to claim 1 , wherein:
the resin body includes a lateral wall portion surrounding the light emitting element in a top view,
the protecting member covers at least a portion of each of a plurality of lateral surfaces of the light emitting element and at least a portion of an inner lateral surface of the lateral wall portion, and
a portion of the protecting member covering the first A surface is continuously connected with a portion of the protecting member covering the at least a portion of each of the plurality of lateral surfaces of the light emitting element and a portion of the protecting member covering the at least a portion of the inner side surface of the lateral wall portion.
7. The light emitting device according to claim 6 , wherein:
a maximum height of the portion of the protecting member covering each of the plurality of lateral surfaces of the light emitting element from the first A surface is equal to a maximum height of the portion of the protecting member covering the inner lateral surface of the lateral wall portion from the first A surface.
8. The light emitting device according to claim 1 , wherein:
the resin body includes a lateral wall portion surrounding the light emitting element in a top view, and
in the top view, the first protrusion is located along an entirety of a portion of the first C surface that is surrounded by the lateral wall portion.
9. The light emitting device according to claim 1 , wherein:
the second lead includes:
a second A surface,
a second B surface opposite to the second A surface, and
a second C surface located between the second A surface and the second B surface and defining at least one second protrusion,
the protecting member is disposed in at least a portion of a gap between the second protrusion and the resin body, and
in the cross-sectional view, the second protrusion extends from an end portion of the second A surface at a first lead side toward the first lead.
10. The light emitting device according to claim 9 , wherein:
in a top plan view, the light emitting element overlaps with the first protrusion and the second protrusion.
11. The light emitting device according to claim 1 , wherein:
the protecting member contains resin and particles, and
in a cross-sectional view, an area of the particles is in a range of 0.5 times to 100 times an area of the resin.
12. The light emitting device according to claim 1 , wherein:
the first B surface is exposed from the resin body.
13. The light emitting device according to claim 1 , wherein:
the resin body includes a lateral wall portion surrounding the light emitting element in a top view,
the protecting member covers at least a portion of each of a plurality of lateral surfaces of the light emitting element and at least a portion of an inner lateral surface of the lateral wall portion,
a portion of the protecting member covering the first A surface is continuously connected with a portion of the protecting member covering the at least a portion of each of the plurality of lateral surfaces of the light emitting element and a portion of the protecting member covering the at least a portion of the inner side surface of the lateral wall portion,
the protecting member contains resin and particles, and
in a cross-sectional view, an area of the particles is in a range of 0.5 times to 100 times an area of the resin.
14. The light emitting device according to claim 1 , wherein:
the resin body includes a lateral wall portion surrounding the light emitting element in a top view,
the protecting member covers at least a portion of each of a plurality of lateral surfaces of the light emitting element and at least a portion of an inner lateral surface of the lateral wall portion,
a portion of the protecting member covering the first A surface is continuously connected with a portion of the protecting member covering the at least a portion of each of the plurality of lateral surfaces of the light emitting element and a portion of the protecting member covering the at least a portion of the inner side surface of the lateral wall portion,
a maximum height of the portion of the protecting member covering each of the plurality of lateral surfaces of the light emitting element from the first A surface is equal to a maximum height of the portion of the protecting member covering the inner lateral surface of the lateral wall portion from the first A surface,
the protecting member contains resin and particles, and
in a cross-sectional view, an area of the particles is in a range of 0.5 times to 100 times an area of the resin.
15. A light emitting device comprising:
a base comprising:
a first lead including:
a first A surface,
a first B surface opposite to the first A surface, and
a first C surface located between the first A surface and the first B surface and defining at least one first protrusion,
a second lead separated from the first lead, and
a resin body covering the first C surface and holding the first lead and the second lead;
a light emitting element disposed on the first A surface; and
a protecting member disposed continuously on at least a portion of the first A surface and in at least a portion of a gap between the first protrusion and the resin body, wherein:
in a cross-sectional view, the first protrusion extends from a first end portion of the first A surface at a second lead side toward the second lead,
the resin body includes a lateral wall portion surrounding the light emitting element in a top view,
the protecting member covers at least a portion of each of a plurality of lateral surfaces of the light emitting element and at least a portion of an inner lateral surface of the lateral wall portion, and
a portion of the protecting member covering the first A surface is continuously connected with a portion of the protecting member covering the at least a portion of each of the plurality of lateral surfaces of the light emitting element and a portion of the protecting member covering the at least a portion of the inner side surface of the lateral wall portion.
16. The light emitting device according to claim 15 , wherein:
in the cross-sectional view, the first protrusion extends from a second end portion of the first B surface at the second lead side toward the second lead.
17. The light emitting device according to claim 15 , wherein:
a maximum height of the portion of the protecting member covering each of the plurality of lateral surfaces of the light emitting element from the first A surface is equal to a maximum height of the portion of the protecting member covering the inner lateral surface of the lateral wall portion from the first A surface.
18. The light emitting device according to claim 15 , wherein:
the protecting member contains resin and particles, and
in a cross-sectional view, an area of the particles is in a range of 0.5 times to 100 times an area of the resin.
19. The light emitting device according to claim 15 , wherein:
a maximum height of the portion of the protecting member covering each of the plurality of lateral surfaces of the light emitting element from the first A surface is equal to a maximum height of the portion of the protecting member covering the inner lateral surface of the lateral wall portion from the first A surface,
the protecting member contains resin and particles, and
in a cross-sectional view, an area of the particles is in a range of 0.5 times to 100 times an area of the resin.
20. A light emitting device comprising:
a base comprising:
a first lead including:
a first A surface,
a first B surface opposite to the first A surface, and
a first C surface located between the first A surface and the first B surface and defining at least one first protrusion,
a second lead separated from the first lead, and
a resin body covering the first C surface and holding the first lead and the second lead;
a light emitting element disposed on the first A surface; and
a protecting member disposed continuously on at least a portion of the first A surface and in at least a portion of a gap between the first protrusion and the resin body, wherein:
in a cross-sectional view, the first protrusion extends from a first end portion of the first A surface at a second lead side toward the second lead,
the protecting member contains resin and particles, and
in a cross-sectional view, an area of the particles is in a range of 0.5 times to 100 times an area of the resin.