TWI689093B - Light emitting element and display device - Google Patents

Abstract

An object of the present invention is to realize a light-emitting element that is easy to manufacture even if the light-emitting portion is miniaturized, can increase the light-emitting intensity of the light-emitting portion, and can improve the heat dissipation of the light-emitting portion. The means for solving the above-mentioned problem is that at least a part of the first separation groove (12) is formed in a circular arc shape that holds the center (12c) on the side of the second light emitting portion (2) when viewed from above.

Description

Light emitting element and display device

The present invention relates to a light-emitting element and a display device.

Previously, a light-emitting element and a display device including a plurality of light-emitting parts have been known. As a conventional light-emitting element, Fig. 1C of Patent Document 1 discloses a light-emitting element array (light-emitting element) in which a plurality of light-emitting parts are arranged in an array. Furthermore, the symbol 120 in Fig. 1C of Patent Document 1 is a metallization layer for contacts (electrical connection).

Furthermore, Fig. 16 of Patent Document 1 discloses a display device in which a plurality of micro LEDs (Light Emitting Diode) 135 are mounted on the receiving side substrate 400. The plurality of micro LEDs 135 are individually mounted on the light-emitting element array, and are mounted on the receiving-side substrate 400. Furthermore, in Fig. 16 of Patent Document 1, the member 410 is a driver contact, and the member 420 is a common contact line.

Patent Document 1: US Patent Publication No. 2013/0126827 (published on May 23, 2013)

In Patent Document 1, the light-emitting element array is temporarily individualized and mounted on the receiving-side substrate 400. Therefore, the display device of Patent Document 1 is not suitable for a high-pixel display device, a display device with a small pixel pitch, or the like. Therefore, research is being carried out to realize a display device that does not individualize the light-emitting element array but includes a plurality of light-emitting parts.

Here, in order to realize a small, high-definition, and high-pixel display device, further miniaturization of each light-emitting portion is necessary. However, when the light-emitting parts are miniaturized, various problems arise.

As a first problem, since the margin of positional displacement with respect to the metallization layer 120 is extremely small, manufacturing is difficult. As a second problem, it is difficult to enlarge the metallization layer 120. If the metallization layer 120 cannot be enlarged, it is difficult to increase the luminous intensity of the light emitting portion, or it is difficult to improve the heat dissipation of the light emitting portion.

An object of one aspect of the present invention is to realize a light-emitting element that is easy to manufacture even if the light-emitting portion is miniaturized, can increase the light-emitting intensity of the light-emitting portion, and can improve the heat dissipation of the light-emitting portion. Moreover, an object of one aspect of the present invention is to realize a display device provided with the light-emitting element.

In order to solve the above-mentioned problems, a light-emitting element of one aspect of the present invention is characterized by comprising: a first light-emitting portion having a first electrode that is substantially circular in plan view; and a second light-emitting portion that is substantially circular in plan view A second electrode having a shape; and a third light emitting portion having a third electrode that is substantially circular in plan view; the first light emitting portion, the second light emitting portion, and the third light emitting portion constitute the first light emitting portion Arranged as a corner of the apex, there is formed a first separation groove that separates the first light-emitting portion from the second light-emitting portion, and at least a portion of the first separation groove is formed to hold the center at the second light emission in a plan view The arc on the side.

In order to solve the above-mentioned problems, a display device according to an aspect of the present invention is characterized by including the above-mentioned light-emitting element.

According to one aspect of the present invention, even if the light emitting portion is miniaturized, it is easy to manufacture, the light emitting intensity of the light emitting portion can be increased, and the heat dissipation of the light emitting portion can be improved.

1: the first light emitting part

2: Second light-emitting part

3: The third light-emitting part

4: Common electrode part

5: The first light-emitting area

6: Second light-emitting area

7: third light emitting area

8: first electrode

9: Second electrode

10: third electrode

11: Common electrode

12: The first separation tank

13: Second separation tank

51, 52: light emitting element

201: Semiconductor module

12a, 13a: arc

12c, 13c: center

12w: the width of the first separation groove

13w: the width of the second separation tank

1t: Length of the boundary between the first light-emitting part and the common electrode part

2t: Length of the boundary between the second light-emitting part and the common electrode part

3t: the length of the boundary between the third light-emitting part and the common electrode part

FIG. 1 is a plan view showing a schematic configuration of light-emitting elements according to Embodiments 1 to 6 of the present invention.

FIG. 2 is a schematic configuration diagram showing light-emitting elements according to Embodiments 1 to 6 of the present invention, and is a view of the light-emitting element viewed in the first direction.

3 is a diagram showing a schematic configuration of a modified example of the light-emitting element according to Embodiments 1 to 6 of the present invention, and is a view of the light-emitting element viewed in the first direction.

4 (a) is a view of the light-emitting element shown in FIG. 2 viewed in the second direction, and (b) is a view of the light-emitting element shown in FIG. 3 viewed in the second direction.

5 is a flowchart showing a method of manufacturing a light-emitting element according to Embodiment 8 of the present invention.

6 (a) to (c) are diagrams illustrating a part of the steps shown in FIG. 5.

7(a) to (d) are diagrams illustrating an example of a method of manufacturing a semiconductor module configured using the light-emitting element of Embodiment 8 of the present invention.

The form for implementing the present invention will be described with reference to the drawings. In addition, in order to facilitate the explanation, the components that have been previously explained and the components having the same function may be marked with the same symbols, and the description thereof may be omitted.

[Embodiment 1]

FIG. 1 is a plan view showing a schematic configuration of a light-emitting element 51 according to Embodiments 1 to 6 of the present invention. The light-emitting element 51 includes a first light-emitting portion 1, a second light-emitting portion 2, a third light-emitting portion 3, and a common electrode portion 4.

The first light emitting section 1 has a first light emitting region 5 composed of LEDs. The second light-emitting portion 2 has a second light-emitting area 6 composed of LEDs. The third light-emitting portion 3 has a third light-emitting area 7 composed of LEDs.

The first light-emitting portion 1, the second light-emitting portion 2, and the third light-emitting portion 3 are arranged so as to form an angle with the first light-emitting portion 1 as a vertex. That is, when the first light-emitting part 1 is understood as the point 1p, the second light-emitting part 2 is understood as the point 2p, and the third light-emitting part 3 is understood as the point 3p, the situation becomes as follows: the point 1p is not located at the connection point 2p On the line segment 1s with the point 3p, an angle θ with the point 1p as the vertex is formed between the point 1p, the point 2p and the point 3p. As an example of this arrangement, an L-shaped arrangement and a V-shaped arrangement can be cited (both portions where the word is bent correspond to point 1p).

The first light emitting section 1 has a first electrode 8. The second light emitting section 2 has a second electrode 9. The third light emitting section 3 has a third electrode 10. The common electrode portion 4 has a common electrode 11. The first electrode 8, the second electrode 9, the third electrode 10, and the common electrode 11 each have a substantially circular shape in plan view. The so-called substantially round shape here means a round shape or a positive n-angle shape (6≦n) that is easy to approximate a round shape. In the light-emitting element 51, the first electrode 8, the second electrode 9, the third electrode 10, and the common electrode 11 each have a circular shape in plan view. The first electrode 8, the second electrode 9, and the third electrode 10 each function as one of the positive electrode and the negative electrode, and the common electrode 11 functions as the other of the positive electrode and the negative electrode. Furthermore, the first electrode 8, the second electrode 9 and the third electrode 10 are electrically connected to the common electrode 11.

In addition, the first separation groove 12 and the second separation groove 13 are formed in the light emitting element 51. The first separation groove 12 is interposed between the first light-emitting portion 1 and the second light-emitting portion 2. The first separation groove 12 is electrically insulated from the first light-emitting portion 1 and the second light-emitting portion 2, and is a groove for preventing the color mixture of the light emitted by the first light-emitting portion 1 and the light emitted by the second light-emitting portion 2 . The second separation groove 13 is interposed between the first light-emitting portion 1 and the third light-emitting portion 3. The second separation groove 13 is electrically insulated from the first light-emitting portion 1 and the third light-emitting portion 3, and is a groove for preventing the color mixture of the light emitted by the first light-emitting portion 1 and the light emitted by the third light-emitting portion 3 .

At least a part of the first separation groove 12 is formed in an arc shape that holds the center 12c on the side of the second light-emitting portion 2 in a plan view. That is, the first separation groove 12 includes a portion along the arc 12a centered on the center 12c.

According to the light emitting element 51, the region 14 between the first electrode 8 and the first separation groove 12 and the region 15 between the second electrode 9 and the first separation groove 12 can be prevented from locally narrowing. With this, the margin of the positional displacement with respect to the first electrode 8 and the margin of the positional displacement with respect to the second electrode 9 can be sufficiently secured, so the manufacture of the light-emitting element 51 becomes easy. Furthermore, by this, the first electrode 8 and the second electrode 9 can be enlarged. By increasing the first electrode 8, the light emission of the first light emitting portion 1 can be increased Strength and improve the heat dissipation of the first light-emitting portion 1. By increasing the second electrode 9, the luminous intensity of the second light-emitting portion 2 can be increased and the heat dissipation of the second light-emitting portion 2 can be improved.

Similarly, at least a part of the second separation groove 13 is formed in an arc shape that holds the center 13c on the side of the third light-emitting portion 3 in a plan view. That is, the second separation groove 13 includes a portion along the arc 13a centered on the center 13c.

According to the light emitting element 51, the region 16 between the first electrode 8 and the second separation groove 13 and the region 17 between the third electrode 10 and the second separation groove 13 can be prevented from locally narrowing. Thereby, the margin of the positional displacement with respect to the first electrode 8 and the margin of the positional displacement with respect to the third electrode 10 can be sufficiently secured, so that the manufacture of the light-emitting element 51 becomes easy. Furthermore, by this, the first electrode 8 and the third electrode 10 can be enlarged. By increasing the third electrode 10, the luminous intensity of the third light emitting portion 3 can be increased and the heat dissipation of the third light emitting portion 3 can be improved.

[Embodiment 2]

In the light-emitting element 51, the first electrode 8, the second electrode 9, the third electrode 10, and the common electrode 11 are arranged in a lattice shape.

By this, when the combination of the color of light emitted from the first light-emitting part 1, the color of light emitted from the second light-emitting part 2 and the color of light emitted from the third light-emitting part 3 is red, green and blue At this time, the light emitting element 51 can be mounted on the display device with a good balance of light emission colors. In addition, the light emitted from the first light-emitting part 1 may be the light emitted by the first light-emitting part 1 or the light emitted by the first light-emitting part 1 through a color filter or a phosphor Wait for the light from the light conversion layer. The light emission obtained from the second light emitting section 2 and the light emission obtained from the third light emitting section 3 are also the same.

In addition, since the light-emitting element 51 can be formed into a simple shape, the arrangement when the light-emitting element 51 is arranged in plural can be simplified, and it is easy to realize a high-pixel and visually high-quality display device.

[Embodiment 3]

In the light-emitting element 51, the width 12w of the first separation groove 12 does not reach 10 μm. In order to make the width 12w less than 10 μm, it is considered to form the first separation groove 12 between the first light-emitting portion 1 and the second light-emitting portion 2 by etching.

Thereby, since the pitch between the first light-emitting portion 1 and the second light-emitting portion 2 can be sufficiently reduced, a more high-definition light-emitting element 51 can be realized.

Similarly, in the light-emitting element 51, the width 13w of the second separation groove 13 does not reach 10 μm. In order to make the width 13w less than 10 μm, it is considered to form the second separation groove 13 between the first light-emitting portion 1 and the third light-emitting portion 3 by etching.

Thereby, since the pitch between the first light-emitting portion 1 and the third light-emitting portion 3 can be sufficiently small, a more high-definition light-emitting element 51 can be realized.

[Embodiment 4]

In the light emitting element 51, the first electrode 8 and the first separation groove 12 are separated, and the second electrode 9 and the first separation groove 12 are separated. Thereby, the first electrode 8 and the second electrode 9 are surely electrically insulated from the first separation groove 12. Therefore, the insulation performance generated by the first separation groove 12 can be more improved.

Similarly, in the light emitting element 51, the first electrode 8 and the second separation groove 13 are separated, and the third electrode 10 and the second separation groove 13 are separated. Thereby, the first electrode 8 and the third electrode 10 are surely electrically insulated from the second separation groove 13. Therefore, the insulation performance generated by the second separation groove 13 can be more improved.

[Embodiment 5]

When the light emitting element 51 is viewed from above, the first separation groove 12 and the second separation groove 13 are formed to have a length 1t of the boundary between the first light emitting portion 1 and the common electrode portion 4 and a length of the boundary between the second light emitting portion 2 and the common electrode portion 4 2t and the length 3t of the boundary between the third light emitting section 3 and the common electrode section 4 are equal to each other.

Thereby, the width of the path of the current flowing between the first electrode 8 and the common electrode 11 and the width of the path of the current flowing between the second electrode 9 and the common electrode 11 and the third The width of the current path between the electrode 10 and the common electrode 11 is equal to each other. Thereby, it becomes easy to make the amount of current supplied to the first light-emitting section 1, the amount of current supplied to the second light-emitting section 2 and the amount of current supplied to the third light-emitting section 3 mutually the same.

In addition, in a plan view of the light-emitting element 51, the area of the first light-emitting portion 1 is larger than the area of the second light-emitting portion 2 and larger than the area of the third light-emitting portion 3. Furthermore, in the light emitting element 51, the first separation groove 12 and the second separation groove 13 are formed so as to satisfy such a size relationship. At this time, if the color of the light emitted from the first light emitting unit 1 is red, and the combination of the color of the light emitted from the second light emitting unit 2 and the color of the light emitted from the third light emitting unit 3 is green and blue, It can be matched with human visual acuity and is effective.

In addition, in a plan view of the light-emitting element 15, the first separation groove 12 and the second separation may be formed such that the area of the first light-emitting portion 1, the area of the second light-emitting portion 2, and the area of the third light-emitting portion 3 are equal to each other.槽13. 13. Slot 13. This makes it easy to make the light emission amount of the first light-emitting portion 1, the light emission amount of the second light-emitting portion 2 and the light emission amount of the third light-emitting portion 3 mutually the same.

[Embodiment 6]

FIG. 2 is a diagram showing a schematic configuration of the light-emitting element 51, and is a view of the light-emitting element 51 viewed in the first direction x'(see FIG. 1). Fig. 3 is a diagram showing a schematic configuration of a modification of the light-emitting element 51, and is a view of the light-emitting element 51 viewed in the first direction x'. 4(a) is a view of the light-emitting element 51 shown in FIG. 2 viewed in the second direction y (see FIG. 1), and FIG. 4(b) is a view of the light-emitting element 51 shown in FIG. 3 viewed in the second direction y Figure.

The first direction x'refers to a direction in which the light-emitting element 51 is viewed from the side of the common electrode portion 4 so that the common electrode 11 overlaps the first electrode 8 and can be observed. The second direction y is a direction in which the common electrode 11 and the third electrode 10 are juxtaposed, and the light-emitting element 51 is viewed from the side of the common electrode portion 4 and the third light-emitting portion 3.

In the light-emitting element 51, the height of the upper surface of the second electrode 9, the height of the upper surface of the third electrode 10, and the height of the upper surface of the common electrode 11 are the same as each other. Although not shown in FIGS. 2 to 4, the height of the upper surface of the first electrode 8 also corresponds to the height of the upper surface of the second electrode 9, the height of the upper surface of the third electrode 10, and the height of the upper surface of the common electrode 11 the same.

Thereby, when the first electrode 8, the second electrode 9, the third electrode 10, and the common electrode 11 are mounted on the same plane, the light emitting element 51 can be prevented from tilting. Therefore, when the light-emitting element 51 is mounted on a substrate or the like, it is possible to suppress the positional displacement of the light-emitting element 51 with respect to the substrate.

The light-emitting element 51 includes, for example, a growth substrate 18 made of a nitride semiconductor. The first light-emitting portion 1, the second light-emitting portion 2, the third light-emitting portion 3, and the common electrode portion 4 are provided on the growth substrate 18. In addition, the thickness of the growth substrate 18 directly under the common electrode 4 is smaller than the thickness of the growth substrate 18 directly under the first light-emitting portion 1, and is smaller than the thickness of the growth substrate 18 directly under the second light-emitting portion 2, and is smaller than the thickness of the first The thickness of the growth substrate 18 directly below the three light emitting sections 3. The first separation groove 12 and the second separation groove 13 are respectively formed so as to reach the growth substrate 18.

In the light-emitting element 51 shown in FIG. 2, almost no growth substrate 18 remains under the first separation groove 12 and under the second separation groove 13. As a result, the bottom portion 12b of the first separation groove 12 and the bottom portion 13b of the second separation groove 13 are provided at positions lower than the lower end of the common electrode 11, respectively.

On the other hand, in the light-emitting element 51 shown in FIG. 3, a growth substrate 18 to some extent remains below the first separation groove 12 and below the second separation groove 13. As a result, the bottom portion 12b of the first separation groove 12 and the bottom portion 13b of the second separation groove 13 are provided at positions higher than the lower end of the common electrode 11, respectively.

By adjusting the thickness of the growth substrate 18 remaining under the first separation groove 12 and the thickness of the growth substrate 18 remaining under the second separation groove 13, a suitable and desired light-emitting element 51 can be realized.

[Embodiment 7]

A light-emitting element of another aspect of the present invention includes a substrate, a light-emitting layer stacked on the substrate, and positive and negative power-supply electrodes. The light-emitting layer is electrically insulated, and the light-emitting layer may be composed of at least two light-emitting regions.

Moreover, in still another aspect of the present invention, the light-emitting portion regions are adjacent to each other, and when viewed from above, at least one of the light-emitting portion regions (for example, the light-emitting portion region that emits red light) may have a larger area than other areas. (For example, the area of the light-emitting portion area that emits blue or green light).

[Embodiment 8]

FIG. 5 is a flowchart showing a method of manufacturing the light-emitting element 52 of Embodiment 8 of the present invention. 6(a) to (c) are diagrams illustrating a part of the steps shown in FIG. 5. The manufacturing method of the light-emitting element 52 can be applied to the manufacture of the light-emitting element 51 (refer to FIG. 1 ).

First, a substrate 218 (for example, a sapphire substrate) for peeling described below is prepared (step S1). Next, the LED portion 215 is formed on the substrate 218 (step S2: see (a) of FIG. 6). The substrate 218 is a substrate for forming (growing) the light-emitting element 51 and is peeled off after the LED portion 215 is held by the resin 216 described later. The LED portion 215 forms the basis of the first light-emitting region 5, the second light-emitting region 6, the third light-emitting region 7, and the growth substrate 18 of the light-emitting element 51.

The substrate 218 is a substrate on which the semiconductor layer of the LED portion 215 is epitaxially grown. As the substrate in the nitride semiconductor, there are substrates such as an insulating substrate of sapphire or spinel (MgAl ₂ O ₄ ) having any one of the C surface, R surface, and A surface as the main surface, or carbonized Oxide substrates such as silicon (6H, 4H, 3C), Si, ZnS, ZnO, GaAs, diamond and nitride semiconductor lattice bonded lithium niobate, neodymium gallate, GaN and AlN And other nitride semiconductor substrates.

A nitride semiconductor, a general formula of _{In x Al y Ga 1-xy} N (0 ≦ x, 0 ≦ y, x + y ≦ 1), but also B and P, As can be mixed crystal. The n-type semiconductor and p-type semiconductor of the LED portion 215 are not particularly limited to single-layer or multi-layer. The nitride semiconductor layer has a light-emitting layer as an active layer, and the active layer is configured as a single (SQW) or multiple quantum well structure (MQW).

On the substrate 218, the following structure is used: an underlayer of a nitride semiconductor such as a buffer layer, such as a low-temperature growth thin film GaN and a GaN layer, as an n-type nitride semiconductor layer, such as an n-type contact layer and a Si-doped GaN layer An n-type multilayer film layer of GaN/InGaN, followed by an active layer of MQW of InGaN/GaN, and then as a p-type nitride semiconductor layer, for example, a p-type multilayer film layer of Mg-doped InGaN/AlGaN and Mg-doped GaN P-type contact layer. In addition, the light emitting layer (active layer) of the nitride semiconductor has, for example, a quantum well structure including a barrier layer and a well layer. Although the nitride semiconductor used for the active layer may be doped with p-type impurities, it is preferable to increase the output of the light-emitting element 52 by undoped or n-type impurity dopants.

By including Al in the well layer, a wavelength shorter than the wavelength of 365 nm can be obtained as the band gap energy of GaN. The wavelength of the light emitted from the active layer is set in the vicinity of 360 nm to 650 nm according to the purpose and application of the light emitting element 52, and is preferably set to a wavelength of 380 nm to 560 nm. The composition of the well layer is preferably InGaN, which is suitable for use in the visible light and near ultraviolet light regions. In this case, the composition of the barrier layer is preferably GaN or InGaN. As specific examples of the film thickness of the barrier layer and the well layer, they are respectively 1 nm or more and 30 nm or less, and 1 nm or more and 20 nm or less, and there can be a single quantum well with a single well layer, and a plurality of well layers with barrier layers interposed therebetween Quantum well structure.

Next, a plurality of LED side electrodes 342 are formed on the LED portion 215 (step S3: refer to (b) of FIG. 6). As an example of a technique for forming a plurality of LED side electrodes 342, a well-known general electrode forming technique is used. A representative material of each LED side electrode 342 is Au, for example. The three LED-side electrodes 342 shown in (b) of FIG. 6 correspond to the first electrode 8, the second electrode 9, and the third electrode 10, respectively.

Next, by forming two separation grooves 219, the LED portion 215 is divided into three (step S4: refer to (c) of FIG. 6). As a technique for forming each separation groove 219, a standard semiconductor selection is used Etching procedures. The two separation grooves 219 respectively correspond to the first separation groove 12 and the second separation groove 13 of the light emitting element 51. The three members into which the LED portion 215 is divided correspond to the first light-emitting portion 1, the second light-emitting portion 2, and the third light-emitting portion 3 of the light-emitting element 51, respectively.

Finally, the sapphire polished to the one formed in step S4 is completed to complete the light-emitting element 52 (step S5).

In addition, the member corresponding to the common electrode 4 of the light-emitting element 51 is formed at the time point of step S4 in which the separation groove 219 is formed. The insulation of this member from the LED portion 215 can be achieved by setting at least a member corresponding to the common electrode 11 of the light-emitting element 51 to a mesa-structure.

In addition, steps S1 to S5 may be performed so that a plurality of light-emitting elements 52 are arranged in an array. In this case, in step S5, a step of cutting out one light-emitting element 52 is added from the plurality of light-emitting elements 52 arranged in an array.

7( a) to (d) are diagrams illustrating an example of a method of manufacturing the semiconductor module 201 configured using the light-emitting element 52.

After manufacturing the light-emitting element 52, as shown in FIG. 7(a), a wiring board 211 in which the metal wiring 212, the insulating layer 213, and the substrate-side electrode 341 are formed in advance is prepared. For the formation of the substrate-side electrode 341 with respect to the wiring substrate 211, a well-known general electrode formation technique is used. A typical material of the substrate-side electrode 341 is Au, for example. In conjunction with the preparation of the wiring substrate 211, the substrate 218 is inverted as shown in FIG. 7(a). After the inversion, the wiring board 211 and the board 218 are aligned so that the board-side electrodes 341 and the LED-side electrodes 342 face each other.

After the alignment is completed, as shown in FIG. 7( b ), the wiring substrate 211 and the substrate 218 are bonded together. At this time, using the existing bonding technique, the wiring board 211 and the board 218 are pressed from above and below with the corresponding board-side electrode 341 and LED-side electrode 342 bonded. As a result, the corresponding substrate-side electrode 341 and LED-side electrode 342 are integrated to form the electrode 214.

After the bonding step is completed, the gap formed between the wiring board 211 and the substrate 218 is filled with liquid resin. FIG. 7(c) shows the state after filling. In this case, for example, it may be immersed in a container filled with liquid resin in a state after being attached. The main material of the liquid resin is not particularly limited, but for example, epoxy resin is preferred. In addition, the injection method of the liquid resin may be an injection needle, in particular a microneedle that fits the size of the gap formed between the wiring board 211 and the LED portion 215. Methods. As the material of the injection needle in this case, metal or plastic is used.

In the filling step, the liquid resin is preferably filled at a temperature within a temperature range of 50°C to 200°C. This makes it easy to fill the voids normally with liquid resin. Furthermore, the temperature range is preferably 80°C to 170°C. This can reduce the risk of impairing the characteristics of the resin 216 (adhesion, heat dissipation, etc. after a curing process described below). Furthermore, the temperature range is more preferably 100°C to 150°C. Thereby, bubbles and the like generated in the above-mentioned voids can be reduced, and convection or the like can be filled almost completely, making it easy to manufacture the semiconductor module 201.

In particular, when the size of each LED portion 215 is set to, for example, a vertical width and a horizontal width of 20 μm or less, more preferably several μm to several dozen μm, and the thickness of the LED portion 215 is set to a minute size of about several μm (2 μm to 10 μm). In this case, the liquid resin effectively functions as a reinforcing member for improving the fixing force in the step of peeling the substrate and after the peeling. As a result, the unevenness of the characteristics of the resin 216 between the above products can be reduced, so that the semiconductor module 201 can be easily manufactured.

The liquid resin filled in the void is completely buried in the void as shown in FIG. 7(c). As a result, the liquid resin is embedded in the side surface of the LED portion 215, the side surface of the electrode 214 and the level difference surface, and the upper portion of the wiring board 211. After the filling of the liquid resin is completed, the liquid resin is cured. The method for curing the liquid resin is not particularly limited. For example, the liquid resin can be cured by heating the liquid resin or irradiating the liquid resin with ultraviolet rays.

After the filling step is completed, as shown in (d) of FIG. 7, the substrate 218 is peeled off. For this step, the existing stripping technique is used. As an example of an existing peeling technique, a peeling technique using laser light irradiation can be used. For example, when a transparent substrate such as sapphire is used as an LED growth substrate, and a nitride semiconductor is used as a light-emitting element layer for crystal growth, by irradiating laser light from the transparent substrate side under certain conditions, growth of the growth substrate and crystal can be reduced Damage imparted by the interface of layers. In addition, as another means, peeling of the substrate 218 using a wet etching method, wheel grinding, or polishing method may be used.

Since the resin 216 tightly fixes the electrode 214 and the LED portion 215 to the wiring substrate 211, it is possible to prevent the LED portion 215 and the electrode 214 from being peeled together when the substrate 218 is peeled. After the substrate 218 is peeled off, the light exit surface of the LED portion 215 and the surface of the resin 216 are exposed. With this, the manufacturing of the semiconductor module 201 is ended.

The manufacturing method described above is merely an example of a method by which the semiconductor module 201 can be manufactured. The steps described here are for easy manufacturing of the semiconductor module 201, and the steps constituting the manufacturing method of the semiconductor module 201 are not limited to these.

Furthermore, the display device according to one aspect of the present invention includes the light emitting element 51 in the form of a semiconductor module 201, for example. Thereby, in the display device, the same effect as the light-emitting element 51 can be obtained.

〔to sum up〕

The light-emitting element of Aspect 1 of the present invention includes: a first light-emitting portion having a first electrode having a substantially circular shape in a plan view; a second light-emitting portion having a second electrode having a substantially circular shape in a plan view; and a third The light-emitting portion has a third electrode that is substantially circular in plan view; the first light-emitting portion, the second light-emitting portion, and the third light-emitting portion are arranged so as to form an angle with the first light-emitting portion as a vertex, and are formed There is a first separation groove that separates the first light-emitting portion from the second light-emitting portion, and at least a part of the first separation groove is formed in an arc shape that holds the center on the second light-emitting portion side in a plan view.

According to the above configuration, the area between the first electrode and the first separation groove and the area between the second electrode and the first separation groove can be prevented from locally narrowing. Thereby, since the margin of the positional displacement relative to the first electrode and the margin of the positional displacement relative to the second electrode can be sufficiently secured, the manufacture of the light-emitting element becomes easy. Furthermore, by this, the first electrode and the second electrode can be enlarged. By increasing the first electrode, the luminous intensity of the first light-emitting portion can be increased and the heat dissipation of the first light-emitting portion can be improved. By increasing the second electrode, the luminous intensity of the second light emitting portion can be increased and the heat dissipation of the second light emitting portion can be improved.

The light-emitting element of aspect 2 of the present invention in the above aspect 1 includes a common electrode portion having a common electrode electrically connected to the first electrode, the second electrode, and the third electrode. An electrode, the second electrode, the third electrode, and the common electrode are arranged in a lattice.

According to the above configuration, when the combination of the color of light emitted from the first light emitting portion, the color of light emitted from the second light emitting portion, and the color of light emitted from the third light emitting portion is red, green, and blue, The light-emitting element can be mounted on a display device with a good balance of light-emitting colors. In addition, since the light-emitting element can be formed into a simple shape, the layout when the light-emitting elements are arranged in plural can be simplified, and it is easy to realize a high-pixel and visually high-quality display device.

In the light-emitting element of aspect 3 of the present invention, in the above aspect 1 or 2, the width of the first separation groove is less than 10 μm.

According to the above configuration, since the pitch between the first light-emitting portion and the second light-emitting portion can be sufficiently reduced, a more high-definition light-emitting element can be realized.

In the light-emitting element of aspect 4 of the present invention, in any of the above aspects 1 to 3, the first electrode and the first separation groove are separated, and the second electrode and the first separation groove are separated.

According to the above configuration, the first electrode and the second electrode are surely electrically insulated from the first separation groove. Therefore, the insulation performance generated by the first separation groove can be more improved.

In the light-emitting element of aspect 5 of the present invention, in the above-mentioned aspect 2, a second separation groove separating the first light-emitting portion and the third light-emitting portion is formed. When the light-emitting element is viewed from above, the first separation groove and The second separation groove is formed as a length of a boundary of the first light emitting portion and the common electrode portion, a length of a boundary of the second light emitting portion and the common electrode portion, and a boundary of the third light emitting portion and the common electrode portion The lengths are equal to each other.

According to the above configuration, the width of the path of the current flowing between the first electrode and the common electrode, the width of the path of the current flowing between the second electrode and the common electrode, and the flow between the third electrode and the common electrode can be made The widths of the current paths are equal to each other. Thereby, it becomes easy to make the amount of current supplied to the first light-emitting portion, the amount of current supplied to the second light-emitting portion, and the amount of current supplied to the third light-emitting portion mutually the same.

In the light-emitting element of aspect 6 of the present invention, in the above-mentioned aspects 1 to 5, a second separation groove separating the first light-emitting portion and the third light-emitting portion is formed, and when the light-emitting element is viewed from above, the first separation The groove and the second separation groove are formed such that the area of the first light-emitting portion, the area of the second light-emitting portion, and the area of the third light-emitting portion are equal to each other.

According to the above configuration, it becomes easy to make the light emission amount of the first light emitting section, the light emission amount of the second light emitting section, and the light emission amount of the third light emitting section mutually the same.

In the light-emitting element of aspect 7 of the present invention, in aspect 2 or 5 above, the height of the upper surface of the first electrode, the height of the upper surface of the second electrode, and the height of the upper surface of the third electrode are the same as those of the common electrode The heights above are the same as each other.

According to the above configuration, when the first electrode, the second electrode, the third electrode, and the common electrode are mounted on the same plane, the light emitting element can be prevented from tilting. Therefore, when the light emitting element is mounted on a substrate or the like, it is possible to suppress the occurrence of positional displacement of the light emitting element relative to the substrate.

The display device of Aspect 8 of the present invention includes the light-emitting element according to any one of Items 1 to 7 above.

According to the above configuration, the same effect as the light-emitting element can be obtained in the display device.

The present invention is not limited to the above-mentioned embodiments, and various changes can be made within the scope shown in the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in Within the technical scope of the present invention. Further, by combining the technical means disclosed in each embodiment, new technical features can be formed.

1: the first light emitting part

2: Second light-emitting part

3: The third light-emitting part

4: Common electrode part

5: The first light-emitting area

6: Second light-emitting area

7: third light emitting area

8: first electrode

9: Second electrode

10: third electrode

11: Common electrode

12: The first separation tank

13: Second separation tank

12a, 13a: arc

12c, 13c: center

12w: the width of the first separation groove

13w: the width of the second separation tank

14: The area between the first electrode and the first separation groove

15: The area between the second electrode and the first separation tank

16: The area between the first electrode and the second separation tank

17: The area between the third electrode and the second separation tank

51: Light emitting element

1t: Length of the boundary between the first light-emitting part and the common electrode part

2t: Length of the boundary between the second light-emitting part and the common electrode part

3t: the length of the boundary between the third light-emitting part and the common electrode part

x’: the first direction

y: second direction

1p, 2p, 3p: points

1s: line segment

θ: angle

Claims (10)

A light-emitting element characterized by comprising: a first light-emitting portion having a first electrode having a substantially circular shape when viewed from above; a second light-emitting portion having a second electrode having a substantially circular shape when viewed from above; and third light emission The portion includes a third electrode that is substantially circular in plan view. The first light-emitting portion, the second light-emitting portion, and the third light-emitting portion are arranged so as to form an angle with the first light-emitting portion as a vertex, and are formed A first separation groove separating the first light-emitting portion and the second light-emitting portion, at least a portion of the first separation groove is formed in an arc shape that holds the center on the second light-emitting portion side in a plan view. A light-emitting element as claimed in item 1 of the patent scope includes a common electrode part having a common electrode electrically connected to the first electrode, the second electrode and the third electrode, the first electrode and the third electrode The two electrodes, the third electrode, and the common electrode are arranged in a lattice shape. A light-emitting element as claimed in item 1 of the patent application, wherein the width of the first separation groove is less than 10 μm. A light-emitting element as claimed in item 2 of the patent application, wherein the width of the first separation groove is less than 10 μm. The light-emitting element according to any one of claims 1 to 4, wherein the first electrode and the first separation groove are separated, and the second electrode and the first separation groove are separated. A light-emitting element as claimed in item 2 of the patent application, wherein a second separation groove separating the first light-emitting portion and the third light-emitting portion is formed, and when the light-emitting element is viewed from above, the first separation groove and the second separation The groove is formed such that the length of the boundary between the first light emitting portion and the common electrode portion, the length of the boundary between the second light emitting portion and the common electrode portion, and the length of the boundary between the third light emitting portion and the common electrode portion are equal to each other . The light-emitting element according to any one of claims 1 to 4 and item 6, wherein a second separation groove separating the first light-emitting portion and the third light-emitting portion is formed, and when the light-emitting element is viewed from above, The first separation groove and the second separation groove are formed such that the area of the first light emitting portion, the area of the second light emitting portion, and the area of the third light emitting portion are equal to each other. A light-emitting element according to claim 5 of the patent application, wherein a second separation groove separating the first light-emitting portion and the third light-emitting portion is formed, and when the light-emitting element is viewed from above, the first separation groove and the second separation The groove is formed such that the area of the first light emitting portion, the area of the second light emitting portion, and the area of the third light emitting portion are equal to each other. A light-emitting element as claimed in claim 2 or 6, wherein the height of the upper surface of the first electrode, the height of the upper surface of the second electrode, the height of the upper surface of the third electrode and the height of the upper surface of the common electrode are mutually For the same. A display device provided with the light-emitting element according to any one of patent application items 1 to 9.

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