Semiconductor light emitting device and semiconductor light emitting device array
A semiconductor light emitting device includes a package body including a concave portion surrounded by sidewalls, a light emitting diode (LED) chip on a mounting surface of the concave portion, a lead frame in the package body and electrically connected to the LED chip, a wavelength conversion layer in the concave portion and surrounding the LED chip, the wavelength conversion layer being surrounded by the sidewalls of the package body and including a wavelength conversion material, and a transparent resin layer on the wavelength conversion layer, the transparent resin layer having first opposite side surfaces exposed through sides of the package body and spaced apart from each other along a first direction parallel to the mounting surface, and second opposite side surfaces contacting an inner surface of the package body and spaced apart from each other in a second direction parallel to the mounting surface.
1. A semiconductor light emitting device, comprising:
a package body including a concave portion, the concave portion being surrounded by sidewalls of the package body;
at least one light emitting diode (LED) chip on a mounting surface of the concave portion;
a lead frame in the package body, the lead frame being electrically connected to the at least one LED chip;
a wavelength conversion layer in the concave portion and surrounding the at least one LED chip, the wavelength conversion layer being surrounded by the sidewalls of the package body and including a wavelength conversion material; and
a transparent resin layer on the wavelength conversion layer to seal the wavelength conversion layer, the transparent resin layer having:
first opposite side surfaces exposed through sides of the package body, the first opposite side surfaces being spaced apart from each other along a first direction parallel to the mounting surface, and
second opposite side surfaces in contact with an inner surface of the package body, the second opposite side surfaces being spaced apart from each other in a second direction parallel to the mounting surface.
2. The semiconductor light emitting device as claimed in claim 1 , wherein the wavelength conversion layer includes a precipitant of a resin on an upper surface of the at least one LED chip, and the transparent resin layer includes a remaining portion of the resin.
3. The semiconductor light emitting device as claimed in claim 1 , wherein the wavelength conversion material includes K x SiF y :Mn 4+ (2≤x≤3, 4≤y≤7).
4. The semiconductor light emitting device as claimed in claim 1 , wherein the transparent resin layer includes at least one of a phosphor and a dispersant.
5. The semiconductor light emitting device as claimed in claim 1 , wherein a first length of the transparent resin layer between the first opposite side surfaces in the first direction is greater than a second length of the transparent resin layer between the second opposite side surfaces in the second direction.
6. The semiconductor light emitting device as claimed in claim 1 , wherein the first opposite side surfaces of the transparent resin layer are coplanar with respective side surfaces of the package body and respective side surfaces of the lead frame, the respective side surfaces of the lead frame being directly exposed.
7. The semiconductor light emitting device as claimed in claim 1 , wherein a sidewall of the concave portion in the first direction is inclined at an angle between 120° and 170° with respect to an upper surface of the at least one LED chip.
8. The semiconductor light emitting device as claimed in claim 1 , wherein a height of the transparent resin layer in an outer boundary portion of the concave portion is between 30% and 70% of a sum of heights of the wavelength conversion layer and the transparent resin layer.
9. The semiconductor light emitting device as claimed in claim 1 , wherein a height of the transparent resin layer is between 170 μm and 330 μm in an outer boundary portion of the concave portion.
10. The semiconductor light emitting device as claimed in claim 1 , wherein the at least one LED chip includes a plurality of LED chips spaced apart from each other by a predetermined distance in the first direction.
11. The semiconductor light emitting device as claimed in claim 10 , wherein the predetermined distance is between 2.7 mm and 3.4 mm.
12. A semiconductor light emitting device, comprising:
a package body including a concave portion, the concave portion being surrounded by sidewalls of the package body, and the concave portion including a first concave portion and a second concave portion, divided by a partition wall and disposed side by side in a long axial direction;
a first light emitting diode (LED) chip on a mounting surface of the first concave portion;
a second LED chip on a mounting surface of the second concave portion;
a lead frame in the package body, the lead frame being electrically connected to the first LED chip and the second LED chip;
a wavelength conversion layer in the first concave portion and surrounding the first LED chip, the wavelength conversion layer including a wavelength conversion material;
a transparent resin layer in the second concave portion and surrounding the second LED chip;
a first upper layer on the wavelength conversion layer, the first upper layer having first opposite side surfaces spaced apart from each other in the long axial direction of the package body, and one surface of the first opposite side surfaces being exposed through the package body; and
a second upper layer on the transparent resin layer, the second upper layer having second opposite side surfaces spaced apart from each other in the long axial direction of the package body, and one surface of the second opposite side surfaces being exposed through the package body,
wherein the first upper layer and the second upper layer being in contact with a side surface of the package body in a short axial direction of the package body.
13. The semiconductor light emitting device as claimed in claim 12 , wherein the first upper layer and the second upper layer are physically separated by the partition wall, the first upper layer including a wavelength conversion material constituting the wavelength conversion layer, and the second upper layer including silicone constituting the transparent resin layer.
14. The semiconductor light emitting device as claimed in claim 13 , wherein a height of each of the wavelength conversion layer and the transparent resin layer is smaller than a height of the partition wall.
15. The semiconductor light emitting device as claimed in claim 12 , wherein the first upper layer and the second upper layer include one resin layer connected to each other on the partition wall, the one resin layer including silicone constituting the transparent resin layer.
16. A semiconductor light emitting device array, comprising:
an array body including a package body with concave portions arranged side by side in a first direction, each of the concave portions being surrounded by a sidewall;
a light emitting diode (LED) chip on a mounting surface in each of the concave portions, a lead frame being electrically connected to the LED chip;
a wavelength conversion layer in each of the concave portions and surrounding the LED chip, the wavelength conversion layer including a wavelength conversion material that is a precipitant of a resin applied to an upper surface of the LED chip; and
a transparent resin layer on the wavelength conversion layer to seal the wavelength conversion layer, the transparent resin layer extending in the first direction, and including a remaining portion of the resin.
17. The semiconductor light emitting device array as claimed in claim 16 , wherein the wavelength conversion layer is surrounded by a side surface of the package body in each of the concave portions, and the transparent resin layer is surrounded by the side surface of the package body on the wavelength conversion layer.
18. The semiconductor light emitting device array as claimed in claim 16 , wherein a distance between LED chips respectively disposed in the concave portions is between 11 mm and 13 mm.
19. The semiconductor light emitting device array as claimed in claim 16 , wherein the package body further includes additional concave portions, the additional concave portions being separated from the concave portions by the package body in a second direction perpendicular to the first direction.
20. The semiconductor light emitting device array as claimed in claim 19 , wherein layers in the concave portions and the additional concave portions are disposed in different configurations from each other.