CN104103742A - Method for manufacturing white light emitting element - Google Patents

Abstract

The present invention relates to a method of manufacturing a white light emitting element, and in particular to a method of manufacturing a white light emitting element using a ceramic phosphor or a glass phosphor. The present invention uses ceramic phosphors or glass phosphors to replace the sealant mixed with glue and phosphor powder, thereby providing a simple and time-saving method for manufacturing white light-emitting elements, thus improving the reliability and service life of the white-light light-emitting elements.

Description

Method for making white light emitting element

technical field

The invention relates to a method for manufacturing a white light emitting element, in particular to a method for manufacturing a white light emitting element with a ceramic phosphor or a glass phosphor.

Background technique

Most of the current white light-emitting elements are composed of phosphors of various colors and light-emitting diodes of different colors. For example, yellow phosphor is coated on the surface of the blue light emitting diode to make a white light emitting diode, or green phosphor and red phosphor are coated on the surface of the blue light emitting diode to make a white light emitting diode. In the traditional manufacturing process of white light-emitting elements, phosphor powder is coated by mixing phosphor powder with glue, and then coating the surface of light-emitting diodes (such as blue light-emitting diodes) by filling and extrusion. However, the mixing and coating process of phosphor and glue is not only complicated and time-consuming, but also prone to the problem of uneven distribution of phosphor.

FIG. 1 shows a conventional white light emitting diode 10 . The manufacturing method of the white light emitting diode 10 is as follows: After the light emitting diode 14 (such as a blue light emitting diode) is divided from the substrate, the light emitting diode 14 is placed on the lead frame 16 and electrically connected to the lead frame 16 by bonding, and then The light-emitting diode 14 is sealed with a sealant 12 formed by mixing fluorescent powder and glue. However, in the traditional manufacturing process of white light emitting diodes, because phosphor powder and glue need to be mixed first, and then coated on the light emitting diode 14 to seal it, not only the process is more complicated and time-consuming, but also prone to uneven distribution of phosphor powder. In addition, because the fluorescent powder (or the sealant 12 mixed with fluorescent powder) is in direct contact with the light emitting diode 14, the reliability of the white light emitting diode 10 is affected, and the service life of the white light emitting diode 10 is shortened.

In view of this, there is an urgent need for a simpler and time-saving method for manufacturing white light emitting elements, which can effectively improve the reliability and service life of white light emitting elements.

In view of the defects in the above-mentioned existing white light-emitting diode manufacturing methods, the inventor actively researches and innovates based on years of rich practical experience and professional knowledge in the design and manufacture of such products, and cooperates with the application of academic theories, in order to create a The new method for manufacturing white light emitting elements can improve the general existing method for manufacturing white light emitting diodes, making it more practical. Through continuous research, design, and after repeated trial samples and improvements, the present invention with practical value is finally created.

Contents of the invention

The main purpose of the present invention is to overcome the defects of the existing white light emitting diode manufacturing method, and provide a method of manufacturing white light emitting elements, using ceramic phosphors or glass phosphors instead of phosphors and glue to seal Glue is used to manufacture white light emitting elements with a simpler and time-saving manufacturing process, and to effectively improve the reliability and service life of white light emitting elements.

According to another object of the present invention, the present invention provides a method for manufacturing a white light emitting element, especially a method for manufacturing a white light emitting element with a ceramic phosphor or a glass phosphor. The method for manufacturing the white light emitting element includes the following steps: firstly, providing a substrate, on which the light emitting element is arranged, and then, setting the solid-state phosphor above the light emitting element on the substrate.

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. A method for manufacturing a white light-emitting element according to the present invention, which includes: providing a substrate on which a light-emitting element is arranged; and disposing a solid-state phosphor above the light-emitting element on the substrate, and doping There is phosphor powder, so that the solid-state phosphor absorbs part of the light emitted by the light-emitting element and excites the light to mix with the light emitted by the light-emitting element to produce white light.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

The aforementioned method for manufacturing a white light emitting element, wherein the light emitting element is a blue light emitting element, a purple light emitting element, or a laser.

In the aforementioned method for manufacturing a white light emitting element, the solid-state phosphor is a ceramic phosphor composed of a ceramic material and the phosphor powder, wherein the phosphor powder is evenly distributed or doped in the ceramic material.

In the aforementioned method for manufacturing a white light emitting element, the solid-state phosphor is a glass phosphor composed of a glass material and the phosphor powder, wherein the phosphor powder is evenly distributed or doped in the glass material.

In the aforementioned method for manufacturing a white light-emitting element, the phosphor powder includes one of the following phosphor powders: blue-green phosphor powder, yellow phosphor powder, green phosphor powder, red phosphor powder, or two or more of the above-mentioned phosphor powders.

The aforementioned method for manufacturing a white light emitting element, wherein the solid phosphor has a groove corresponding to the light emitting element on the side facing the light emitting element.

In the aforementioned method for manufacturing a white light emitting element, a plurality of light emitting elements are arranged on the substrate.

The aforementioned method for manufacturing a white light emitting element, wherein the solid-state fluorescent body has several grooves on the side facing the light emitting element, each of the grooves corresponds to a light emitting element, and is arranged above the light emitting element.

In the aforementioned method for manufacturing a white light emitting element, wherein the solid-state phosphor is disposed above the light emitting element without contacting the light emitting element.

Therefore, with the above technical solution, the present invention has at least the following advantages: the present invention provides a simpler and time-saving method for manufacturing white light emitting elements, and can effectively improve the reliability and service life of white light emitting elements .

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

FIG. 1A is a schematic diagram of a conventional white light emitting diode.

2A to 2B are three-dimensional flowcharts of a method for manufacturing a white light emitting element according to an embodiment of the present invention.

FIG. 3A is a schematic diagram of a white light emitting element according to an embodiment of the present invention, wherein the white light emitting element is manufactured by the method for manufacturing a white light emitting element of the present invention.

FIG. 3B is a schematic diagram of a white light emitting element according to another embodiment of the present invention, wherein the white light emitting element is manufactured by the method for manufacturing a white light emitting element of the present invention.

[Description of main component symbols]

10: white light emitting diode

12: Sealant

14: LED

16: lead frame

100, 100A, 100B: white light emitting element

102: Substrate

104, 104A, 104B, 104C: light emitting elements

106, 106A, 106B: solid state phosphor

108, 108A, 108B, 108C: Groove

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, manufacturing method, steps, features and details of the white light emitting element proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. Its effect is described in detail below.

Some embodiments of the invention are described in detail below. However, the invention can be broadly practiced in other embodiments than this detailed description. That is to say, the scope of the present invention is not limited by the proposed embodiments, but is subject to the protection scope of the patent claims of the present invention. Secondly, when each element or step in the illustrations of the embodiments of the present invention is described as a single element or step, it should not be regarded as a limited cognition, that is, when the following description does not particularly emphasize the limitation on the number of the present invention The spirit and scope of application of the invention can be extended to structures and methods in which multiple elements or structures coexist. Furthermore, in this specification, different parts of each element are not drawn in full scale, and some dimensions are exaggerated or simplified compared with other relevant dimensions, so as to provide a clearer description and enhance the understanding of the present invention. However, the prior art used in the present invention is only cited here as an emphatic reference to help explain the present invention.

2A to 2B are three-dimensional flowcharts of a method for manufacturing a white light emitting device according to an embodiment of the present invention, which show the entire manufacturing process and various manufacturing process steps in a three-dimensional structure. Referring to FIG. 2A , first, a substrate 102 is provided, wherein a light emitting element 104 is disposed on the substrate 102 . The substrate 102 can be a substrate or a wafer, and the light emitting element 104 can be a blue light emitting element (such as a blue light emitting diode), a purple light emitting element (such as a purple light emitting diode), or a laser (element).

Referring to FIG. 2B , then, the solid-state phosphor 106 is arranged above the light-emitting element 104 on the substrate 102, especially above the light-emitting surface of the light-emitting element 104, and the light-emitting element 104 is accommodated between the substrate 102 and the solid-state phosphor 106. In the formed space, the white light emitting element 100 is fabricated. The solid-state phosphor 106 includes at least one kind of phosphor, which is uniformly doped or distributed in the solid-state phosphor 106, so that the solid-state phosphor 106 can absorb part of the light emitted by the light-emitting element 104, such as blue light, purple light, or laser light. , to excite colored light, such as blue-green light, green light, yellow light, or red light, which is mixed with the light emitted by the light-emitting element 104 to generate white light.

The solid-state phosphor 106 is a ceramic phosphor composed of a ceramic material and at least one phosphor powder. When the ceramic material is fired or made into the solid-state phosphor 106, the phosphor powder can be added to the ceramic material to uniformly Distributed or doped in ceramic materials to make ceramic phosphors. Alternatively, the solid-state phosphor 106 is a glass phosphor composed of a glass material and at least one phosphor powder. When the glass material is fired or made into the solid-state phosphor 106, the phosphor powder can be added to the glass material to make it Evenly distributed or doped in the glass material, and made into a glass phosphor. The solid-state fluorescent body 106 can be a solid-state fluorescent sheet, a solid-state fluorescent block, or other shapes, which can take various shapes according to requirements, which is not limited in the present invention.

The phosphor doped or distributed in the solid phosphor 106 can be green phosphor, yellow phosphor, green phosphor, or red phosphor. Alternatively, in order to enhance the color rendering of the white light-emitting element, the phosphor powder in the solid phosphor 106 may also contain two or more of the above phosphor powders, that is, phosphor powders of two or more colors are evenly doped or distributed in the solid state. Phosphor 106. The solid-state fluorescent body 106 can be a solid-state fluorescent sheet, a solid-state fluorescent block, or other shapes, which can take various shapes according to requirements, which is not limited in the present invention.

Furthermore, the white light emitting element 100 can be fabricated by using different light emitting elements 104 and solid phosphors 106 doped with phosphors of various colors according to the required white light characteristics, such as color rendering. For example, a blue light-emitting element (such as a blue light-emitting diode) can be combined with a solid-state phosphor 106 doped with yellow phosphor to make a white light-emitting element, or a blue light-emitting element (such as a blue light-emitting diode) can be combined with a red phosphor doped at the same time. The solid phosphor 106 of green phosphor is used to make a white light emitting element. Alternatively, in order to enhance the color rendering of the white light-emitting element, a blue light-emitting element (such as a blue light-emitting diode) can be combined with a solid-state phosphor 106 doped with yellow phosphor and blue-green phosphor to make a white light-emitting element, and a blue light-emitting element ( For example, a blue light emitting diode) is combined with a solid phosphor 106 doped with red phosphor, green phosphor, and blue-green phosphor at the same time to make a white light emitting element, or even a blue light emitting element (such as a blue light emitting diode) can be combined and simultaneously doped The solid-state phosphor 106 mixed with yellow phosphor, red phosphor, green phosphor, and blue-green phosphor makes a white light emitting element.

In addition, although the solid-state phosphor 106 is disposed above the light-emitting element 104 and accommodates the light-emitting element 104 in the space formed by the substrate 102 and the solid-state phosphor 106 , the solid-state phosphor 106 does not directly contact the light-emitting element 104 . Therefore, the white light emitting element manufactured by the method for manufacturing the white light emitting element of the present invention will not be the same as the white light emitting diode produced in the traditional way, because the light emitting diode in the white light emitting diode is mixed with the sealant made of fluorescent powder and glue Direct contact will affect the reliability and service life of white light emitting diodes, but can effectively improve the reliability and service life of white light emitting elements.

Furthermore, due to the traditional manufacturing process of white light emitting diodes, it is necessary to mix liquid and viscous glue with powdery phosphor to form a sealant, and then apply it on the light-emitting element, but the liquid and viscous glue will Uniform mixing with powdered phosphors is difficult and time consuming. However, in the method for making a white light emitting element of the present invention, the solid-state phosphor 106 (such as a ceramic phosphor or a glass phosphor) that is uniformly doped or distributed with phosphor powder directly replaces the sealant by mixing glue and phosphor powder, Not only will there be no problem of uniformly mixing the liquid and viscous glue with the powdery phosphor, but the solid phosphor 106 can be directly placed on the substrate 102 in simple steps instead of the coating manufacturing process, for example, directly applying the solid phosphor Body 106 is glued to substrate 102 . Therefore, compared with the traditional manufacturing process of white light emitting diodes, the method for manufacturing white light emitting elements of the present invention is simpler and time-saving.

Referring to FIG. 3A , it is a schematic structural diagram of an embodiment of a white light emitting element 100A manufactured by the method for manufacturing a white light emitting element of the present invention. The white light emitting element 100A has a similar structure to the white light emitting element 100 shown in FIG. 2B . The difference between the white light emitting element 100A and the white light emitting element 100 is that the solid phosphor 106A used in the white light emitting element 100A has a groove 108 corresponding to the light emitting element 104 on its side facing the light emitting element 104 .

However, referring to FIG. 3B , several light-emitting elements 104A, 104B, and 104C may be provided on the substrate 102 used in the method for manufacturing a white light-emitting element of the present invention, and the solid-state phosphor 106A is arranged on the top of the light-emitting elements 104A, 104B, and 104C. Above, the light-emitting elements 104A, 104B, and 104C are accommodated in the space formed by the solid-state phosphor 106B and the substrate 102 at the same time. In addition, on the side of the solid-state phosphor 106B facing the light-emitting elements 104A, 104B, and 104C, the areas facing the light-emitting elements 104A, 104B, and 104C respectively have grooves 108A, 108B, and 108C, that is, each concave groove of the solid-state phosphor 106B The grooves 108A, 108B, 108C all correspond to one light emitting element 104A, 104B, 104C.

In view of the above-mentioned embodiments, the present invention provides a method for manufacturing a white light-emitting element, using solid-state phosphors (such as ceramic phosphors or glass phosphors) instead of mixing phosphors and glue in the traditional white light-emitting diode manufacturing process The sealant is used to make the white light emitting element with a simpler and time-saving manufacturing process, and to effectively improve the reliability and service life of the white light emitting element.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, may use the technical content disclosed above to make some changes or modify them into equivalent embodiments with equivalent changes. Technical Essence of the Invention Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solutions of the present invention.

Claims (9)

1. make a method for white light emitting element, it is characterized in that comprising:

Substrate is provided, on this substrate, is provided with light-emitting component; And

Solid state fluorescence body is arranged to this light-emitting component top on this substrate, this solid state fluorescence body is interior doped with fluorescent material, make this solid state fluorescence body absorb the part light that this light-emitting component sends and inspire light and mix with the light that this light-emitting component sends, and produce white light.

2. the method for making white light emitting element according to claim 1, is characterized in that wherein this light-emitting component is blue light emitting element, purple light light-emitting component or laser.

3. the method for making white light emitting element according to claim 1, is characterized in that wherein this solid state fluorescence body is the ceramic fluorophor that ceramic material and this fluorescent material form, and wherein, this fluorescent material distributes equably or is doped in this ceramic material.

4. the method for making white light emitting element according to claim 1, is characterized in that wherein this solid state fluorescence body is the glass fluorophor that glass material and this fluorescent material form, and wherein, this fluorescent material distributes equably or is doped in this glass material.

5. the method for making white light emitting element according to claim 1, it is characterized in that wherein this fluorescent material comprises following a kind of fluorescent material: blue-green fluorescent powder, yellow fluorescent powder, green emitting phosphor, red fluorescence powder, or comprise two or more above-mentioned fluorescent material.

6. the method for making white light emitting element according to claim 1, is characterized in that this solid state fluorescence dignity is wherein to having in the one side of this light-emitting component groove that should light-emitting component.

7. the method for making white light emitting element according to claim 1, is characterized in that wherein on this substrate, being provided with a plurality of light-emitting components.

8. the method for making white light emitting element according to claim 7, is characterized in that wherein this solid state fluorescence dignity is to having several grooves in the one side of this light-emitting component, and each this groove is a light-emitting component of correspondence all, and is arranged at this light-emitting component top.

9. the method for making white light emitting element according to claim 1, is characterized in that wherein this solid state fluorescence body is arranged at this light-emitting component top and does not contact with this light-emitting component.