阅读说明：本技术 紫外光led芯片结构 (Ultraviolet light LED chip structure ) 是由 周启航 于 2020-06-18 设计创作，主要内容包括：本申请实施例提供了一种紫外光LED芯片结构,包括：一衬底；一发光功能层,其设置于所述衬底下表面,所述发光功能层呈横截面尺寸逐渐增大的棱台状,所述发光功能层的与所述衬底连接的一面横截面尺寸小于所述发光功能层的远离所述衬底的一面的横截面尺寸；一透明导电层,其设置于所述衬底的上表面；一金属发射层,其设置于所述发光功能层的远离所述衬底的一面上。本申请通过将发光功能层的侧壁面设置于倾斜面,从而可以有效的减少紫外光LED芯片结构的上表面的透明电极的面积,增大下表面的金属发射层的面积,从而可以提高紫外光LED芯片结构的出光面积,另外,该倾斜的侧壁面有利于提高紫外光LED芯片结构的光提取效率。(The embodiment of the application provides an ultraviolet ray LED chip structure, includes: a substrate; the light-emitting functional layer is arranged on the lower surface of the substrate, the light-emitting functional layer is in a frustum shape with the gradually increased cross section size, and the cross section size of one surface, connected with the substrate, of the light-emitting functional layer is smaller than that of one surface, far away from the substrate, of the light-emitting functional layer; a transparent conductive layer disposed on the upper surface of the substrate; and the metal emission layer is arranged on one surface of the light-emitting functional layer, which is far away from the substrate. This application sets up in the inclined plane through the side wall face with luminous functional layer to can the transparent electrode's of the upper surface of effectual reduction ultraviolet ray LED chip structure area, the area of the metal emission layer of increase lower surface, thereby can improve the area of giving out light of ultraviolet ray LED chip structure, in addition, the side wall face of this slope is favorable to improving the light extraction efficiency of ultraviolet ray LED chip structure.)

1. An ultraviolet light LED chip structure, comprising:

a substrate;

the light-emitting functional layer is arranged on the lower surface of the substrate, the light-emitting functional layer is in a frustum shape with the gradually increased cross section size, and the cross section size of one surface, connected with the substrate, of the light-emitting functional layer is smaller than that of one surface, far away from the substrate, of the light-emitting functional layer;

a transparent conductive layer disposed on the upper surface of the substrate;

and the metal emission layer is arranged on one surface of the light-emitting functional layer, which is far away from the substrate.

2. The uv LED chip structure according to claim 1, wherein the light emitting functional layer is in the shape of a truncated pyramid having four side edges.

3. The uv LED chip structure according to claim 2, wherein four side wall surfaces of the light emitting function layer are roughened surfaces.

4. The UV LED chip structure according to claim 3, wherein four side wall surfaces of the light emitting function layer are provided with a plurality of stripe structures.

5. The UV LED chip structure according to claim 3, wherein a plurality of uniformly distributed hemispherical bump structures are disposed on four side wall surfaces of the light emitting function layer.

6. The uv LED chip structure according to claim 1, wherein the angle between the side wall surface of the light emitting function layer and the end surface thereof is 91 ° to 179 °.

7. The uv LED chip structure according to claim 1, wherein the transparent conductive layer is an ITO conductive layer or an FTO conductive layer.

8. The uv LED chip structure according to claim 1, wherein the metal emitting layer is an aluminum metal emitting layer.

9. The uv LED chip structure according to claim 1, wherein the light emitting functional layer comprises an LED light emitting chip and a transparent encapsulation layer;

the LED light-emitting chip is arranged on the substrate, and the transparent packaging layer is arranged on the substrate so as to wrap the LED light-emitting chip;

the transparent packaging layer is in a frustum shape with the gradually-increased cross section size, and the cross section size of one side, connected with the substrate, of the transparent packaging layer is smaller than that of one side, far away from the substrate, of the transparent packaging layer.

10. The uv LED chip structure of claim 1, wherein the substrate is a sapphire substrate.

Technical Field

The application relates to the technical field of LED luminescence, in particular to an ultraviolet LED chip structure.

Background

For LED chips having a transparent substrate, such as GaN-based blue (B), green (G), and Ultraviolet (UV) LED chips having a sapphire (α -phase Al2O3) growth substrate, and red (R), yellow (Y), or Infrared (IR) LED chips having a gallium phosphide (GaP) or sapphire substrate; because the transparent substrate is used as a window layer of the LED chip, the transparent substrate has the size of adhesive thickness relative to an LED light-emitting layer, light in a certain proportion can be emitted from the side face of the flip chip, meanwhile, because the refractive index of the transparent substrate material is generally between that of the LED light-emitting material and that of air, the smaller refractive index difference between the transparent substrate and the air allows light rays to have an escape cone with a larger emission angle, the traditional flip LED chip has a larger emission angle relative to a normally-installed LED chip, and the light extraction rate of the LED chip structure in the prior art is lower.

In view of the above problems, no effective technical solution exists at present.

Disclosure of Invention

An object of the embodiment of the application is to provide an ultraviolet LED chip structure, can improve light extraction efficiency.

In a first aspect, an embodiment of the present application provides an ultraviolet LED chip structure, including:

a substrate;

the light-emitting functional layer is arranged on the lower surface of the substrate, the light-emitting functional layer is in a frustum shape with the gradually increased cross section size, and the cross section size of one surface, connected with the substrate, of the light-emitting functional layer is smaller than that of one surface, far away from the substrate, of the light-emitting functional layer;

a transparent conductive layer disposed on the upper surface of the substrate;

and the metal emission layer is arranged on one surface of the light-emitting functional layer, which is far away from the substrate.

Optionally, in the ultraviolet LED chip structure according to this embodiment of the application, the light-emitting functional layer is in a shape of a frustum of a prism having four lateral edges.

Optionally, in the ultraviolet LED chip structure according to this embodiment of the application, four side wall surfaces of the light-emitting functional layer are roughened surfaces.

Optionally, in the ultraviolet LED chip structure according to this embodiment of the application, a plurality of stripe structures are disposed on four side wall surfaces of the light-emitting functional layer.

Optionally, in the ultraviolet LED chip structure according to the embodiment of the present application, a plurality of convex point structures that are uniformly distributed and are hemispherical are disposed on four side wall surfaces of the light-emitting functional layer.

Optionally, in the ultraviolet LED chip structure according to this embodiment of the present application, an included angle between a side wall surface of the light-emitting functional layer and an end surface thereof is 91 ° to 179 °.

Optionally, in the ultraviolet LED chip structure according to this embodiment of the application, the transparent conductive layer is an ITO conductive layer or an FTO conductive layer.

Optionally, in the ultraviolet LED chip structure according to this embodiment of the application, the metal emitting layer is an aluminum metal emitting layer.

Optionally, in the ultraviolet LED chip structure according to this embodiment of the present application, the light emitting function layer includes an LED light emitting chip and a transparent encapsulation layer;

the LED light-emitting chip is arranged on the substrate, and the transparent packaging layer is arranged on the substrate so as to wrap the LED light-emitting chip;

the transparent packaging layer is in a frustum shape with the gradually-increased cross section size, and the cross section size of one side, connected with the substrate, of the transparent packaging layer is smaller than that of one side, far away from the substrate, of the transparent packaging layer.

Optionally, in the ultraviolet LED chip structure according to this embodiment of the present application, the substrate is a sapphire substrate.

By last knowing, the ultraviolet ray LED chip structure that this application embodiment provided sets up in the inclined plane through the side wall face with luminous functional layer to can the effectual area that reduces the transparent electrode of the upper surface of ultraviolet ray LED chip structure, the area of the metal emission layer of increase lower surface, thereby can improve the light-emitting area of ultraviolet ray LED chip structure, in addition, the side wall face of this slope is favorable to improving the light extraction efficiency of ultraviolet ray LED chip structure through its reflection to the ultraviolet ray that LED luminous chip sent.

Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of an ultraviolet LED chip structure provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an ultraviolet LED chip structure in some embodiments of the present application. This ultraviolet ray LED chip structure includes: a substrate 10, a light emitting function layer 20, a transparent conductive layer 30 and a metal emission layer 40.

The layer of the light-emitting function 20 is arranged on the lower surface of the substrate 10, the light-emitting function layer 20 is in a frustum shape with the cross section size gradually increasing, and the cross section size of one surface of the light-emitting function layer 20 connected with the substrate 10 is smaller than that of one surface of the light-emitting function layer 20 far away from the substrate; the transparent conductive layer 30 is arranged on the upper surface of the substrate 10; the metal emission layer 40 is disposed on a side of the light-emitting functional layer 20 away from the substrate 10.

Specifically, the substrate 10 may be a sapphire substrate, but is not limited thereto, and a substrate of another material may be used.

Wherein, the luminous functional layer is in a frustum pyramid shape with four side edges 20. The four side wall surfaces of the light-emitting functional layer 20 are roughened surfaces. For example, the four side wall surfaces of the light-emitting functional layer 20 are provided with a plurality of stripe structures. Of course, it is understood that in other embodiments, the four sidewall surfaces of the light-emitting functional layer 20 are provided with a plurality of bump structures which are uniformly distributed and have hemispherical shapes.

Specifically, the light emitting function layer 20 includes an LED light emitting chip and a transparent encapsulation layer; the LED light-emitting chip is arranged on the substrate 10, and the transparent packaging layer is arranged on the substrate to wrap the LED light-emitting chip; the transparent packaging layer is in a frustum shape with the gradually-increased cross section size, and the cross section size of one side, connected with the substrate, of the transparent packaging layer is smaller than that of one side, far away from the substrate, of the transparent packaging layer.

The transparent packaging layer can be made of organic transparent materials or inorganic transparent materials. Correspondingly, the transparent packaging layer is in a frustum pyramid shape with the gradually increased cross section size, and the cross section size of one surface, connected with the substrate, of the transparent packaging layer is smaller than that of one surface, far away from the substrate, of the transparent packaging layer. In addition, four side wall surfaces of the light-emitting functional layer 20, that is, four side wall surfaces of the transparent encapsulating layer, are roughened surfaces, for example, the side walls thereof may be provided with a plurality of stripes or a plurality of bumps.

In some embodiments, the side wall surface of the luminescent functional layer 20 is at an angle of 91 ° to 179 ° with respect to the end surface thereof. For example, the included angle may be 120 ° or 135 °.

Specifically, in some embodiments, the transparent conductive layer 30 is an ITO conductive layer or an FTO conductive layer. The transparent conductive layer 30 may form an electrode structure through an image drawing process.

Specifically, in some embodiments, the metal emitting layer 40 is an aluminum metal emitting layer, but may be an emitting layer of other materials.

By last knowing, the ultraviolet ray LED chip structure that this application embodiment provided sets up in the inclined plane through the side wall face with luminous functional layer to can the effectual area that reduces the transparent electrode of the upper surface of ultraviolet ray LED chip structure, the area of the metal emission layer of increase lower surface, thereby can improve the light-emitting area of ultraviolet ray LED chip structure, in addition, the side wall face of this slope is favorable to improving the light extraction efficiency of ultraviolet ray LED chip structure through its reflection to the ultraviolet ray that LED luminous chip sent.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.