JP2013080833A - Light emitting device and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light emitting device which has high position accuracy, causes only small loss of light, and achieves high optical coupling efficiency and light extraction efficiency, and to provide a manufacturing method of the light emitting device.SOLUTION: A light emitting device has: a light emitting element mounted on a substrate; a light transmission layer disposed on the light emitting element; a translucent plate disposed on the light transmission layer; and a lens formed on the translucent plate. The light transmission layer covers a side surface of the light emitting element so as to connect a lower surface end part of the translucent plate with a lower surface end part of the light emitting element. An outer edge of the lens is defined by an outer edge of an upper surface of the translucent plate with which the lens contacts.

Description

  The present invention relates to a light emitting device and a manufacturing method thereof, and more particularly, to a light emitting device including an optical element optically coupled to a light emitting diode (LED) and a manufacturing method thereof.

  Conventionally, a light emitting device in which a resin layer (that is, a wavelength conversion layer) containing a phosphor material is formed on a light emitting element such as a light emitting diode (LED), and the light from the light emitting element and the light from the phosphor are mixed and emitted. It has been known. In addition, a light emitting device including a lens for collecting the mixed emission light is known.

  For example, Patent Documents 1 and 2 disclose glass-coated light-emitting elements in which the light-emitting elements are covered with glass. More specifically, glass is placed on the upper surface of the semiconductor light emitting element where no electrode is formed, and the glass is softened to form a glass lens with surface tension. It is disclosed that the surface of the glass lens forms a part of a spherical surface wider than the hemispherical surface. In Patent Document 3, a lens is disposed on the main surface of the other light-emitting element facing the main surface on which the electrode of the light-emitting element is formed, and the outer peripheral end of the opposing surface coincides with the outer peripheral end of the lens. In addition, a light emitting device is disclosed in which a spherical surface of a lens is formed to bulge outward from the outer peripheral end portion. Patent Document 4 discloses a structure including a transparent optical element (lens) coupled to a light emitting element.

Republished WO2008-041771 JP 2006-310375 A JP 2002-305328 A JP 2002-141556 A

  However, the conventional light emitting device as described above has various problems. For example, in the glass-coated light-emitting elements disclosed in Patent Documents 1 and 2, when a glass lens is formed, the temperature is raised to the softening temperature of glass (for example, 600 ° C.), so that the light-emitting element is loaded. Moreover, it may become unlighted by the stress. Further, in the light emitting device of Patent Document 3, since the upper surface of the light emitting element and the outer peripheral end portion of the lens are formed to coincide with each other, the size of the lens is the light emitting element even if the lens forms a slight bulge. And not so much. Further, in the light emitting device of Patent Document 4, since the lens is disposed on the upper surface of the light emitting element, the light emission from the side surface of the light emitting element cannot be used efficiently.

  The present invention has been made in view of the above-described points, and its object is to solve the problems of the conventional light emitting device as described above, high positional accuracy, low light absorption and loss, and optical coupling efficiency. Another object is to provide a light emitting device with high light extraction efficiency. It is another object of the present invention to provide a light emitting device in which a lens is formed with high accuracy and is free from uneven color and variation among individuals.

The light-emitting device of the present invention is formed on a light-emitting element mounted on a substrate, a light-transmitting layer disposed on the light-emitting element, a light-transmitting plate disposed on the light-transmitting layer, and the light-transmitting plate A lens, and
The light transmitting layer covers the side surface of the light emitting element so as to connect the lower surface end of the light transmitting plate and the lower surface end of the light emitting element, and the outer edge of the lens is the outer edge of the upper surface of the light transmitting plate in contact with the lens It is characterized by being defined by.

The method for manufacturing a light emitting device of the present invention includes a step of mounting a light emitting element on a substrate, a step of applying a wavelength converter-containing material on the light emitting element so as to cover a side surface of the light emitting element, and a wavelength conversion applied Placing the translucent plate on the body-containing material, and forming a lens on the translucent plate,
The light transmissive layer covers the side surface of the light emitting element so as to connect the lower surface end of the light transmissive plate and the lower surface edge of the light emitting element, and the outer edge of the lens is formed by the outer edge of the upper surface of the light transmissive plate in contact with the lens. It is characterized by being defined.

(A) is a top view of the light emitting device of Example 1, and (b) and (c) schematically show cross sections taken along lines VV and WW in FIG. 1 (a), respectively. It is sectional drawing shown. 6 is a cross-sectional view schematically showing a method for manufacturing the light-emitting device of Example 1. FIG. These are cross-sectional views schematically showing an example of another manufacturing method of the light emitting device. (A)-(c) is sectional drawing which shows typically the structure of the light-emitting device of the comparative examples 1, 2, and 3 with respect to the light-emitting device of a present Example. It is the elements on larger scale of the light emitting laminated body which show typically the case where the side surface shape of a wavelength conversion layer is a curved surface convex outward. It is sectional drawing which shows typically the cross section along the VV line of the light-emitting device at the time of using a several light emitting element.

  In the following, preferred embodiments of the present invention will be described, but these may be appropriately modified and combined. In the drawings described below, substantially the same or equivalent parts will be described with the same reference numerals.

  1A is a top view of the light-emitting device 5 according to the first embodiment of the present invention, and FIGS. 1B and 1C are respectively the VV line and the WW line of FIG. 1A. It is sectional drawing which shows typically the cross section along.

  As shown in FIGS. 1B and 1C, the light emitting element 11 is mounted via a plurality of bumps 12 on a submount substrate 10 on which wiring (not shown) is formed on the upper surface (element mounting surface). ing. The bump 12 is made of, for example, gold (Au), and connects the electrode of the light emitting element 11 and the wiring of the submount substrate 10.

  In the following, a case where the light emitting element 11 is mounted on the substrate via the bump 12 will be described as an example, but the present invention is not limited thereto. For example, the light emitting element 11 may be mounted on a substrate on which wiring electrodes are formed.

  A light transmission layer 13 is formed on the top and side surfaces of the light emitting element 11. In the following, a case where a wavelength conversion layer is formed as the light transmission layer 13 (hereinafter referred to as the wavelength conversion layer 13) will be described as an example, but a layer that does not contain a wavelength converter may be used. A transparent plate 14 is formed on the wavelength conversion layer 13. Light emitted from the light emitting element 11 and the wavelength conversion layer 13 is extracted with the upper surface of a transparent plate (hereinafter, also simply referred to as a plate) 14 as a light extraction surface. Hereinafter, a laminated structure including the light emitting element 11, the wavelength conversion layer 13, and the plate 14 is referred to as a light emitting laminated body 15.

  The wavelength conversion layer 13 is formed so as to cover the side surface of the light emitting element 11. More specifically, the side surface of the wavelength conversion layer 13 has an inclined surface shape that connects the lower surface end (edge) of the plate 14 and the lower surface end (edge) of the light emitting element 11, and the wavelength conversion layer 13. Forms a fillet portion 13 </ b> F covering the side surface of the light emitting element 11. The outside of the side surface of the wavelength conversion layer 13 is air.

  A lens 21 having a hemispherical shape is provided on the plate 14. Note that the lens 21 is not hatched for easy viewing and understanding of the drawing. The detailed configurations of the light emitting laminate 15 and the lens 21 will be described in detail later.

[Configuration of light-emitting laminate]
On the base material of the wavelength conversion layer 13, phosphor particles 13a are dispersed at a high concentration, and a spacer 13b is further disposed. As the base material, a material that is transparent or translucent to the light emitted from the light emitting element 11 and the fluorescence emitted from the phosphor particles 13 a excited by the light emitted from the light emitting element 11 is used. The substrate may be an organic material such as a transparent resin or an inorganic material such as glass. For example, a transparent resin such as a silicon resin or an epoxy resin can be used. Moreover, if it is smaller than the particle size of the spacer 13b, a filler and a pigment | dye can also be disperse | distributed and mixed in a base material.

  The spacer 13 b contained in the wavelength conversion layer 13 is sandwiched between the light emitting element 11 and the transparent plate 14, thereby defining a distance between the upper surface of the light emitting element 11 and the transparent plate 14. The layer thickness is specified (determined). The spacer 13b may be in the form of particles having a desired particle size according to the layer thickness of the wavelength conversion layer 13 to be formed, and the shape may be a polyhedron or a sphere. For example, a spacer 13b having a particle size of 10 μm or more and 100 μm or less can be suitably used. Since the spacer 13b having such a particle size is larger by one digit or more than the visible light wavelength emitted from the light emitting element 11, an effect of scattering light hardly occurs.

  The upper and lower portions of the spacer 13b may be in direct contact with the transparent plate 14 and the light emitting element 11, respectively, between the spacer 13b and the transparent plate 14, and between the spacer 13b and the upper surface of the light emitting element 11. The base material constituting the conversion layer 13 may be sandwiched. Due to the viscosity of the base material before curing and the wettability of the surface of the spacer 13b to the base material, affinity with the base material is generated around the spacer 13b, and the base material enters between the spacer 13b and the plate 14. is there. However, since affinity with the base material is generated under the same conditions for all the spacers 13b, the spacers 13b still exhibit the function of defining the layer thickness of the wavelength conversion layer 13.

  The material of the spacer 13b may be an inorganic material such as glass or an organic material such as resin as long as it can realize a predetermined particle size with high accuracy. The spacer 13b is desirably translucent or transparent with respect to the light emitted from the light emitting element 11 and the fluorescence of the phosphor, and more preferably transparent. It is also possible to disperse the phosphor inside the spacer 13b. As the phosphor to be dispersed, the same phosphor as the phosphor particles 13a can be used.

  In order to support the transparent plate 14 parallel to the upper surface of the light emitting element 11, it is preferable that at least three spacers 13 b are arranged on the upper surface of the light emitting element 11. In particular, the light emitting elements 11 are preferably arranged one by one at the four corners of the upper surface.

  Since the spacer 13b has a large particle size, there is no effect of changing the mutual position by the attractive force / repulsive force between the particles, and the spacer 13b maintains the dispersed state at the time of being kneaded with the base material and the phosphor particles 13a. Expanded to

  As the phosphor particles 13a, particles having a particle diameter smaller than that of the spacer 13b are used. Specifically, it may be slightly smaller than the particle diameter of the spacer 13b, but is preferably 10% or smaller. As the phosphor particles 13a, a phosphor that is excited by light emitted from the light emitting element 11 and emits fluorescence of a desired wavelength is used. For example, in the case of configuring a light emitting device that emits white light, a light emitting element 11 that emits blue light can be used, and a phosphor that emits yellow fluorescence using blue light as excitation light (for example, a YAG phosphor) can be used.

  The transparent plate 14 may be any member as long as it has a flat lower surface and the lower surface is supported by the spacer 13b so that a space (wavelength conversion layer 13) having a constant distance from the upper surface of the light emitting element 11 can be formed. The flat lower surface of the transparent plate 14 may be macroscopically flat, and microscopic unevenness for diffusing and orienting light may be formed microscopically. In the case of forming irregularities, the size of the irregularities is preferably 5 μm or less in order not to affect the action of the spacers 13b and the phosphor particles. It is also possible to provide unevenness for light diffusion / orientation on the upper surface side of the transparent plate 14.

  In addition, since the upper surface of the transparent plate 14 serves as a light extraction surface, surface treatment may be performed to improve the light extraction efficiency. Further, the upper surface of the transparent plate 14 is not necessarily a flat surface, and may have a shape for the purpose of scattering, condensing, orientation, a spherical shape, an aspherical shape, or a Fresnel lens shape. Alternatively, an uneven surface may be formed, or the surface may be roughened.

  Here, the plate 14 is transparent to the light emitted from the light emitting element 11 and the fluorescence emitted from the phosphor particles 13a. However, the plate 14 is a translucent plate or has a desired optical characteristic. It doesn't matter. For example, a plate filter that cuts a predetermined wavelength may be used as the plate 14. Further, a fluorescent glass plate containing a phosphor component that converts light from the light emitting element 11 into light having a desired wavelength, or a fluorescent ceramic plate (for example, a YAG plate) produced by sintering a phosphor material may be used. Is possible.

  In order to suppress reflection at the interface between the wavelength conversion layer 13 and the plate 14, it is preferable that the refractive indexes of the wavelength conversion layer 13 and the plate 14 are the same. Further, the surface of the plate 14 may be a polished surface, but a rough surface is preferable in order to suppress reflection at the interface with the resin or the like and improve the extraction efficiency. Further, the surface of the plate 14 is preferably a rough surface also in terms of wettability and adhesion of resin or the like.

  As the submount substrate 10, for example, a substrate made of aluminum nitride ceramics or alumina ceramics with wiring such as gold (Au) is used. As the bump 12, for example, a gold (Au) bump is used.

[Configuration of plate and lens]
First, the light emitting element 11 is a flip chip type LED, and is mounted with the light emitting surface (main surface) as an upper surface. For example, the light emitting element 11 has a thickness of 100 μm, and the light emitting surface has a size of 1 mm × 1 mm. Further, as described above, the wavelength conversion layer 13 is formed on the light emitting element 11, and the transparent plate 14 is formed on the main surface of the wavelength conversion layer 13.

  The plate 14 has a size larger than that of the light emitting element 11. As described above, the wavelength conversion layer 13 covers the side surface of the light emitting element 11, and the side surface of the wavelength conversion layer 13 includes the lower surface end (end side) of the plate 14 and the lower surface end (end side) of the light emitting element 11. And has an inclined surface shape. In this embodiment, the plate 14 has a square shape with a main surface (upper surface) of 2.3 mm on a side and a thickness of 100 μm. Here, it is preferable that the sides of the plate 14 and the light emitting element 11 are arranged in parallel to each other. Moreover, it is preferable that the symmetry center (namely, the intersection of diagonal lines) of the wavelength conversion layer 13 and the light emitting element 11 is aligned (coincided) in the stacking direction.

  In addition, although the shape and size of the plate 14 and the light emitting element 11 are not limited to these, below, the case where the plate 14 and the light emitting element 11 have a square shape and the said size is demonstrated to an example.

  As described above, the lens 21 is formed on the plate 14. As shown in FIGS. 1A to 1C, the lens 21 is a lens having a substantially hemispherical shape, but the shape is deviated from the hemispherical shape in the vicinity of the plate 14.

  More specifically, FIG. 1B shows a cross section along a direction (FIG. 1A, line VV) parallel to one side of the light extraction surface (upper surface) of the plate 14, and FIG. The cross section along the diagonal direction (FIG. 1 (a), WW line) of the plate 14 is shown. The lens 21 has a hemispherical shape in the cross-section in the parallel direction (FIG. 1B), but has a shape in which the hem is expanded from the hemispherical shape in the diagonal direction (FIG. 1C )). That is, the lens 21 is formed so as not to exceed the upper surface end portion of the plate 14 and to cover the entire upper surface of the plate 14. In other words, the lens 21 is a hemispherical lens having a hemispherical lens portion 21 </ b> S and a lens / fillet portion 21 </ b> F having hems spread on the four sides of the upper surface of the plate 14 due to surface tension of the lens resin (described later). In other words, the outer edge of the bottom surface of the lens 21 (that is, the surface in contact with the plate 14) is defined by four sides (outer edges) of the upper surface of the plate 14.

[Method for Manufacturing Light Emitting Device]
Next, the manufacturing method of the light-emitting device 5 of a present Example is demonstrated with reference to Fig.2 (a)-(d). In addition, the cross section similar to the cross-sectional view along the VV line in FIG. First, as shown in FIG. 2A, the wiring on the submount substrate 10 and the element electrode of the light emitting element 11 are electrically connected using the bumps 12, and the light emitting element 11 is mounted. An uncured base material for the wavelength conversion layer 13 is prepared, the phosphor particles 13a and the spacers 13b are added at a predetermined concentration, and are kneaded to uniformly disperse in the base material. Get. As shown in FIG. 2B, a predetermined amount of this paste 13 ′ is applied (or dropped) on the upper surface of the light emitting element 11, and a transparent plate 14 slightly larger than the upper surface of the light emitting element 11 is mounted. A load is applied to the weight of the transparent plate 14 or, if necessary, to the upper surface of the transparent plate 14, and the transparent plate 14 is supported on the upper surface of the light emitting element 11 by the spacer 13 b in the paste 13 ′. The distance from the plate 14 is determined by the spacer 13b.

  As a result, as shown in FIG. 2C, the uncured paste 13 'corresponds to the particle size of the spacer 13b or the thickness of the base material layer covering the periphery of the spacer 13b added to the particle size. A layer of paste 13 'having a layer thickness is formed. At this time, the paste 13 ′ maintains the surface tension while covering the side surface of the light emitting element 11, thereby forming a fillet portion 13 </ b> F having an inclined surface connecting the side surface of the light emitting element 11 and the lower surface of the transparent plate 14.

  Next, as shown in FIG. 2D, a dispenser 25 is used to discharge (drop) a predetermined amount of transparent or translucent silicon resin (lens resin), which is a material of the lens 21, onto the transparent plate 14. . The dropped resin can have a hemispherical shape due to the surface tension of the resin. Further, the lens 21 may be formed on the upper surface of the transparent plate 14 with high accuracy by the surface tension of the resin, that is, the center of the upper surface of the transparent plate 14 and the center of the hemispherical lens 21 are aligned. it can. Therefore, the optical coupling efficiency between the light emitting laminate 15 and the lens 21 is high. As described above, the outer edge of the bottom surface of the lens 21 is defined by the four sides (outer edges) of the upper surface of the transparent plate 14, and the hem spreads on the four sides of the upper surface of the transparent plate 14 due to the hemispherical lens portion 21S and the surface tension of the lens resin. A hemispherical lens 21 having a fillet portion 21F can be formed. The lens diameter of the lens 21 can be adjusted by changing the dropping amount of the silicon resin. After dripping the silicon resin, the resin of the wavelength conversion layer 13 and the lens 21 is cured for 4 hours in an environment of 150 ° C., for example, and the light emitting device 5 shown in FIGS. 1A to 1C is completed. .

  As described above, the case where the lens 21 is formed on the plate 14 after the light emitting laminate 15 including the light emitting element 11, the wavelength conversion layer 13, and the plate 14 is formed has been described, but the present invention is not limited thereto. For example, as shown in FIG. 3, after the light emitting element 11 is mounted on the substrate 10, an uncured resin of the wavelength conversion layer 13 including the phosphor particles 13a and the spacers 13b is applied on the light emitting element 11. On this, a plate 14 on which a lens 21 is formed in advance may be mounted to form the light emitting device 5 shown in FIGS.

[Light extraction efficiency of light emitting device]
The light extraction efficiency of the light emitting device 5 of the present example having the above configuration will be described below in comparison with Comparative Example 1-3. In the light emitting device 5 of this embodiment, the light emitted from the light emitting element 11 is incident on the wavelength conversion layer 13, and part of the light is converted into light having a predetermined wavelength by the phosphor, and the light emitted from the light emitting element 11 It is mixed and emitted from the transparent plate 14. In particular, the light emitted from the side portion of the light emitting element 11 and the light converted by the wavelength conversion layer 13 are reflected by the side surface of the wavelength conversion layer 13, that is, the inclined surface (side surface) of the fillet portion 13F. The reflected light is directed to the transparent plate 14. The light incident on the transparent plate 14 and emitted from the upper surface of the transparent plate 14 is collected by the action of the lens 21 and is emitted to the outside of the light emitting device 5.

  4A to 4C are cross-sectional views schematically showing the structure of a light emitting device of a comparative example with respect to the light emitting device 5 of the present embodiment. More specifically, FIG. 4A shows a light emitting device of Comparative Example 1, in which a light emitting element 81 is mounted on a substrate 81 via electrodes 82 such as bumps, and resin is potted to form a convex shape. A light emitting device having a structure in which a lens 83 is formed is shown. FIG. 4B shows the light emitting device of Comparative Example 2, similarly, a light emitting device having a structure in which a hemispherical lens 84 filled with a resin 85 is formed inside a hollow hemisphere having a flange 84A. ing. FIG. 4C shows a light emitting device of Comparative Example 3, which has a structure in which a dam 86 is formed of resin and a hemispherical lens 87 is formed by potting the resin inside thereof.

  The size of the light emitting device and the light extraction efficiency (that is, the ratio of the light output from the light emitting device after resin sealing to the light output from the light emitting element before resin sealing) in these comparative examples will be described below. The diameter of the lens 83 of Comparative Example 1 was about 1 mmφ, and the light extraction efficiency was about 10%. The diameter of the lens 84 of Comparative Example 2 was about 2 mmφ, and the light extraction efficiency was about 18%. The diameter of the lens 87 of Comparative Example 3 was about 3 mmφ, and the light extraction efficiency was about 27%. As the radius of the lens increases, the light extraction efficiency increases. In the light emitting devices of these comparative examples, in order to further increase the light extraction efficiency, for example, 30% or more, it is necessary to further increase the lens diameter. However, since the size of the light emitting device in the planar direction increases, it becomes an obstacle to miniaturization.

  In the light emitting device 5 of this example, the diameter of the lens 21 was about 2 mmφ, and the light extraction efficiency was 37%. Such high light extraction efficiency is obtained because the light emitted from the side portion of the light emitting element 11 and the light converted by the wavelength conversion layer 13 are the side surfaces of the wavelength conversion layer 13, that is, the inclined surfaces of the fillet portions 13F. This is because the light is reflected by the light and directed toward the transparent plate 14. As shown in the partially enlarged view of FIG. 5, in order to efficiently reflect the light from the wavelength conversion layer 13 and improve the extraction efficiency, the side surface shape of the fillet portion 13F of the wavelength conversion layer 13 is the wavelength conversion layer. It is preferable that the curved surface is convex outwardly. In particular, it preferably has a spherical shape. The side surface shape of the wavelength conversion layer 13 can be adjusted by the size of the plate 14 and the light emitting element 11 and the amount and viscosity of the material (resin etc.) of the lens 21.

  In this embodiment, the resin of the wavelength conversion layer 13, the transparent plate 14, and the lens 21 have the same refractive index (n = 1.4), but are refracted from the wavelength conversion layer 13 toward the lens 21. By setting the refractive index (refractive index of the wavelength conversion layer 13> refractive index of the transparent plate 14> refractive index of the lens 21) so as to reduce the refractive index, the light extraction efficiency can be further improved.

  In the present embodiment, the light emitting device 5 using one light emitting element 11 has been described. However, a plurality of light emitting elements are used, a wavelength conversion layer and a plate are provided on the plurality of light emitting elements, and a lens is provided on the plate. It may be a structure in which is formed. FIG. 6 shows a cross-sectional view taken along line VV of the light-emitting device 5 when a plurality of light-emitting elements are used instead of the single light-emitting element 11 in FIG. That is, the wavelength conversion layer 13 is formed so as to cover the plurality of light emitting elements 11 and the side surfaces of the plurality of light emitting elements 11, and the wavelength conversion layer 13 plate 14 is disposed thereon. Even in such a case, as shown in FIG. 6, the wavelength conversion layer 13 covers the entire outer edge of the plurality of light emitting elements 11, and the side surface of the wavelength conversion layer 13 is the lower surface of the plate 14, as in the above embodiment. It has an inclined surface that connects the end portion and the lower surface end portions of the plurality of light emitting elements 11, and is formed so as to form a fillet 13F. Further, in terms of efficiently reflecting the light from the wavelength conversion layer 13, the shape of the side surface (the inclined surface) of the fillet portion 13 </ b> F of the wavelength conversion layer 13 has a curved surface shape that is convex outward of the wavelength conversion layer 13. It is preferable. Furthermore, the bottom surface 13G of the wavelength conversion layer 13 in the region between the plurality of light emitting elements 11 has a curved shape that is convex inward (concave outward) of the wavelength conversion layer 13 in order to improve extraction efficiency. Is preferred.

  In the above-described embodiment, the case where the square plate 14 is used has been described as an example. However, the plate 14 may have a rectangular shape or a circular shape. Moreover, although the case where the lens 21 on the plate 14 is hemispherical has been described as an example, it may be a lens having a spherical surface at least partially. For example, a lens having a semi-elliptical spherical shape, a cylindrical shape, or a dome shape may be used. For example, when a plurality of light emitting elements are arranged in a line and a rectangular plate is used, a lens material may be potted on the plate to form a cylindrical (semi-cylindrical) lens.

  As described above, according to the light emitting device of the present invention, the emitted light from the light emitting element 11 and the wavelength conversion layer 13 is efficiently reflected by the side surface of the wavelength conversion layer 13 and efficiently guided into the lens 21 to collect the light. Since it is emitted and emitted to the outside, the extraction efficiency can be improved. Further, since the lens 21 and the plate 14, that is, the light emitting laminate 15 can be aligned with high accuracy, the coupling efficiency between the light emitting laminate 15 and the lens 21 is high.

  Therefore, a light emitting device with high light extraction efficiency can be provided. In addition to this, as described above, a lens with high-precision optical axis alignment with the light emitting laminate can be easily formed, so that the coupling efficiency is high, and the color unevenness of the light emitting device or between the individual A light-emitting device without variation can be provided. Furthermore, a light emitting device with high accuracy and high coupling efficiency can be easily manufactured.

  The above-described embodiments can be applied by appropriately combining or modifying them. Moreover, the above-described materials, numerical values, and the like are merely examples.

DESCRIPTION OF SYMBOLS 10 Board | substrate 11 Light emitting element 13 Wavelength conversion layer 13F Fillet part of wavelength conversion layer 14 Plate 15 Light emitting laminated body 21 Lens 21F Lens fillet part

Claims (9)

A light emitting device mounted on a substrate;
A light transmissive layer disposed on the light emitting element;
A translucent plate disposed on the light transmissive layer;
A lens formed on the translucent plate,
The light transmission layer covers a side surface of the light emitting element so as to connect a lower surface end of the light transmitting plate and a lower surface end of the light emitting element,
An outer edge of the lens is defined by an outer edge of an upper surface of the translucent plate that is in contact with the lens.   The light-emitting device according to claim 1, wherein the light transmission layer contains a wavelength converter.   The light-emitting device according to claim 1, wherein a side surface of the light transmission layer has a curved surface that protrudes outward from the light transmission layer.   The said translucent plate has square shape, The said lens has the fillet part which the base spreads on the four sides of the upper surface of the said translucent plate, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. Light-emitting device. Mounting a light emitting element on a substrate;
Applying a light transmissive material on the light emitting element so as to cover a side surface of the light emitting element;
Placing a light transmissive plate on the coated light transmissive material;
Forming a lens on the translucent plate,
A light transmissive layer made of the light transmissive material covers a side surface of the light emitting element so as to connect a lower surface end of the light transmissive plate and a lower surface end of the light emitting element;
The outer edge of the lens is defined by the outer edge of the upper surface of the translucent plate that is in contact with the lens.   The manufacturing method according to claim 5, wherein the step of placing the light transmissive plate on the light transmissive material is performed after execution of the step of forming a lens on the light transmissive plate. Method.   The manufacturing method according to claim 5, wherein the light transmissive material contains a wavelength converter. Forming the lens comprises:
Providing an uncured resin material on the translucent plate;
The method according to claim 5, further comprising: curing a resin material on the translucent plate.   The manufacturing method according to claim 5, wherein a side surface of the light transmission layer has a curved surface protruding outward from the light transmission layer.

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