TW200418204A - LED structure and manufacturing method - Google Patents

Abstract

A LED structure and its manufacturing method are provided. The light emitting material (for example, fluorescence powder or phosphorescence powder) and nana-scale (for example, 1 to 500nm) composite inorganic powder are mixed into an encapsulation (for example, epoxy resin) to form a mixer. The mixer is coated or deposited on a LED chip surface and periphery, and then the light emitting material in the mixer can be stimulated by the LED-generated UV photons to generate visible light. The composite inorganic material floating in the encapsulation can reflect the remaining UV photons that don't stimulate the light emitting material to let them have chances to re-stimulate the light-emitting material during the reflection process and generate the visible light. Therefore, the invented mixer can let the UV photons emitted from the LED chip adequately react with the light emitting material, so that more bright visible light is emitted on the LED chip surface and periphery, and the UV light is greatly reduced.

Description

200418204

V. Description of the invention (1) The technical field to which the invention belongs: The present invention relates to a method for manufacturing a light emitting diode, which can not only make the light emitting diode crystals emit brighter white light, reduce or avoid ^ ^ The ultraviolet photons generated by it are directly radiated outward, = 7 in the case of the human body. μ-Eradiated Technology: Light Emitting Diode (Light Emitting Diode (hereinafter referred to as LED)) is a kind of element made of semiconductor materials. Because it can convert electric energy into light, it belongs to a fine solid-state light source. = Small, long life, low driving voltage, fast response rate and excellent shock resistance. ^ And it can meet the design requirements of light, thin, short and small, and is widely used in all kinds of products in daily life.

There are many types of light-emitting diodes. According to their light-emitting wavelengths, they can be roughly divided into two types: visible light and invisible light. Among them, visible light-emitting diodes are mainly used for display purposes, and the brightness is 1 candle (cd). The demarcation point between general LED and high-brightness LED. General LED is widely used in various indoor display products, and high-brightness LED is suitable for outdoor display products, such as: automobile third brake light, outdoor information board and traffic number . As for invisible light LEDs, such as infrared LEDs, they are used in devices such as remote control of household appliances, automatic detection of industrial waste, photo paper size detection, automatic door and automatic flushing device control. At present, the production and application of UV light emitting diodes (UV LEDs) with a wavelength of 350 ~ 400nm are in progress.

Page 5 200418204 V. Description of the invention (2) In the rapid development, this kind of light-emitting diode mainly uses the generated ultraviolet photons to excite the fluorescent or emissive powder coated thereon to convert ultraviolet light Convert it into visible light of different colors, and adjust the formula of red, green, blue fluorescent or phosphor powder to make it produce white light under the proper ratio. As far as current technology is concerned, the brightness of white light-emitting diodes derived from ultraviolet light-emitting diodes has reached 60 lm / W. It is estimated that by 2010, it will reach 100 lm / W ~ 120 lm / W, therefore, with the advantage of 120lm / W brightness, white light-emitting diodes will have a good opportunity to replace fluorescent lamps (with a brightness of about 120 lm / W) and incandescent lamps (with a brightness of about lm / W). W), as the star of tomorrow for indoor and outdoor lighting. White light emitting " Monopole has small volume, low heat generation (no thermal radiation), low power consumption (low voltage and low current start), long life (more than 10,000 hours), and fast response time (Can be used as the standard of South Frequency), strong shock resistance, good environmental compatibility (recyclable waste, no pollution), and flat packaging (light and thin wing), etc., in addition to being used in the lighting field, such as: Type flashlights, such as indicator lights and display backlight sources, will be released in the next ten years. It is widely used in cars, indoor and outdoor lighting, etc. Because the white LED of deer lighting has more than 5 times longer life than the current light source, it can be replaced by the current fluorescent tube, and it can fully solve the environmental protection problem of mercury in waste lamps. '、 Flash check' Generally, the so-called ultraviolet rays can be divided into A-ray (Ultraviolet-A rays (hereinafter referred to as uvA) ^ rays (Ultraviolet-B rays (hereinafter referred to as uvB)) and 0-rays (Ultraviolet-C rays, hereinafter referred to as UVC ) And so on three, of which UVa

200418204 V. Description of the invention (3) It can be further subdivided into long-wave UVA and short-wave UVA. UVC rarely falls to the ground. Only UVA and UVB will affect us. According to medical research, immediate exposure to UVA and UVB can not only make the skin red, black, peeling, or itchy. If exposed to UVA and UVB for a long time, it will gradually dry the skin and make the skin dry. Pigmentation and freckles appear. In addition, the skin's metabolism will also slow down, and the gradually accumulated dead skin will make the skin rough, and cause the loss of gum, which will cause the skin to lose elasticity, relaxation, aging or wrinkles. Chance of skin cancer. Press' Ultraviolet-excited fluorescent or phosphorescent powder is one of the white light emitting diodes. However, the particle size of the fluorescent or luminous powder coated on the light emitting diode is only about 1 ~ 2 Q microns, therefore, the ultraviolet photons produced by the diode often leak out before the fluorescent or phosphorescent powder is excited, and the wavelength of the leaked ultraviolet light is 3 50 to 40 0 nm. In the UVA band (320 ~ 400nm), [JVA band ultraviolet has been proven to be the culprit of human skin aging and skin cancer. In particular, the cumulative damage has the most terrible effect. Therefore, if you fail to add anti-feature, then white light-emitting diodes will be widely used in daily life, and human skin will be seriously injured due to the severe exposure to UVA-band ultraviolet light. … Yi Xiong, therefore, how to develop a light-emitting diode grain that can emit more = redundant white light, and can reduce or prevent it from radiating ultraviolet photons, so as to prevent ultraviolet light from directly harming human skin, It is an important subject at the moment. Tanigo

Page 7 200418204 V. Description of the invention (4) Summary of content: Due to the above-mentioned long-term efforts in research and development of photodiodes and the absence of ultraviolet light, one of the invention's external photons can regenerate and avoid the effects on the human body. The skin is made of inorganic powder, which evenly forms a mixture of grains, and the excited fluorescent particles are suspended in the excitation process. The mixture is matched with the special case of the hair surface or external light, and the light powder or the colloid is The re-excitation of the luminescent material can cause the light material to be generated on its surroundings, thinking that it is a valuable sign and its work icon. Its traditional whiteness and construction and its pollution purpose are divided into harmless mixed objects, and The light-emitting two-filling powder of the compound purple and the light-emitting light are divided into two parts, and the emission is avoided by the inspection committee, and the implementation of the light-emitting light-emitting diode test is finally opened. The light-emitting diode system hopes to coat the light-emitting The main technology of ultraviolet light is to use fluorescent powder to form the polar body of the mixture, and to generate photons and materials outside the inorganic powder. The effect of the particles is to make the body brighter and the body can take the hair further. The design of the body is as follows: In the design phase of the body, the body is filled or coated with 0-diode fluorescent powder. The visible light generated can scatter the visible light out of the white light, and the lack of recognition and recognition of the ultraviolet light. The inventor has produced an invention of the present invention to produce a high-grained body or a dish-radiated nanometer light. The powder is plated with a UV light and there is a chance to reflect it. Therefore, the ultraviolet light diodes and the large scars can be damaged and shapely understood. The emitted purple light powder is produced to the atmosphere, and the compound colloidal light-emitting diode photons of the degree can not be reflected directly in the mixture. The photon of the invention The reduction of the bulk grain size and the structure are implemented.

200418204 V. Description of the invention (5) Implementation mode:

The present invention relates to a structure of a light-emitting diode and a manufacturing method thereof. Please refer to FIG. 1 ', which refers to a light-emitting material 2 and a composite inorganic powder 1 of nanometer (nanometer, nm for short). After being uniformly mixed into a colloid 3, a mixture is formed. After the mixture is coated or plated on or around a surface of a light-emitting diode die 4, the light-emitting material 2 in the mixture can be used by the light-emitting two. The ultraviolet photons 5 generated by the polar crystal grains 4 excite 'to produce visible light, and the composite inorganic powder 1' suspended in the colloid 3 in the mixture can reflect the remaining ultraviolet light which cannot directly excite the luminescent material 2 Photon 5 'gives it the opportunity to re-excite the luminescent material 2 during reflection and generate visible light. Since the mixture of the present invention can make the ultraviolet photons 5 scattered by the light-emitting diode grains 4 fully interact with the light-emitting material 2, the light-emitting diode crystal can be made by the present invention. The surface of the particle 4 or on the periphery emits brighter white light, and the leakage of ultraviolet light is greatly reduced to prevent human skin from being damaged by the ultraviolet light.

C. In the present invention, please refer to FIG. 1, each of the composite inorganic powders] includes at least one inorganic powder 11 (such as zinc oxide, titanium dioxide, etc.) and at least one insulating oxide 12 (such as: two Silicon oxide, aluminum trioxide, etc.), wherein the inorganic powder 11 is nanometer-sized (its particle size is between 500 nm, but 5 to 200 nm is the best), and it is exposed to ultraviolet light. Electrons and holes that can move freely can be decomposed under irradiation. As for these insulating oxides 12 ', their dimensions are smaller (the particle size is between 0 · ι-5〇ηπι, but 2 ~ 25nm is the best) Is covered on the surface of each of the inorganic powders 11.

200418204 V. Explanation of the invention (6) Yong Ran, why the surface of each inorganic powder 11 must be frosty, stupid, P, and negative, and must be 7 1 9 σρ 9 / Modal A / Peltier αα, etc. Free solution 2: The inorganic powder 11 can be divided into electrons and holes after being irradiated with ultraviolet light. In this case, it will cause colloid 3 to be semi-reduced by the rolling reaction. : Covers the insulation with a smaller scale :::; titanium; i :; surface moving knife: Ϊ:;, which can effectively reduce the number of electrons and holes that the inorganic powder 11 can decompose and move freely. According to the former leader of L, the mixture was coated or plated on a light-emitting diode that can be etched on or around the "surface" or "around", which means that the mixture is not only encapsulated in 4 particles. A plastic kicking case (about the light-emitting II, Γΐ Λ f packaging technology is not the focus of this patent, so it is not ^ here, the second, or the talent, you can also coat or plate the mixture on the plastic case The light-emitting material 2 in the body.4 # compound can be excited by the ultraviolet photons 5 generated by the light-emitting diode grains 4 to generate visible light. Φ I ί Ming, please refer to Figure 1 It shows that the composite inorganic powder 1 hemp #speaking: 化 chemical word, titanium dioxide, or magnesium oxide, kaolin, sulfuric acid ^): 1 ... and other compounds, can also include zinc oxide, dioxide = Magnesium, Nanling clay, calcium sulfate, and talc are compounded in a certain ratio to form a mixture. In a preferred embodiment of the present invention, the blend may be a mixture of zinc oxide and titanium dioxide. The mixture, however, the scope of rights claimed in the present invention is not limited to this, according to the present invention, those who are familiar with the 4 skills Technical content to expose the use of other

200418204 V. Description of the invention (7) The mixture of the composite inorganic powders 1, such as: using oxygen dioxin, or dioxin, oxidized town and kaolin, or using: acid = stone powder 'or titanium dioxide and talc Powder ... and other compounds are mixed according to a certain combination ratio, all of which are the mixtures referred to in the present invention below. These composite inorganic powders have a small particle size, and when mixed into the mixture, when they are sub-coated on the light-emitting diode grains 4, they can appear colorless and transparent to effectively reflect ultraviolet photons, and make about At least 85% of visible light photons penetrate the characteristics of the mixture. The color can be body color, or the light powder makes the composite glue material on the titanium oxide according to the hair color 500nm) into the mixed colorless transparent visible light, resulting in the development of the fluorescent powder color in the present invention, can be covered by any Or photo-filled inorganic powder, such as: In the present invention, in the composite uncovered trioxide, in the bright state, the photon penetrates the composition of the photodiode Chiyou material 2 or phosphor powder in the meter scale. The fluorescent powder or the phosphorescent powder includes red, green, and blue, or includes blue and ^ excited by the ultraviolet photon 5, so that white powder and powder can be produced. As for the composition of the colloid 3, It is a transparent epoxy resin (Epoxy Resin) that can uniformly glue together the body 1 and the light-emitting material. In a preferred embodiment, please refer to FIG. 1 and FIG. 2. The test results show that, if a nanometer scale (such as: 1 ^ 'machine powder 1 (such as zinc oxide is covered with dioxide dioxide gas _ ^ Aluminium oxide), its particle size is very small, so when Ioxane> Kun combined coating on the light-emitting diode crystal grains 4, the ultraviolet light photons 5 are effectively reflected, and about & (Shown in Figure 2); On the other hand, if the percentage of the composite inorganic powder 1 is 1, the transparency will be reduced, and the brightness will be lower than that of the crystal grain 4. Therefore, "avoid the second I and the next 5 inorganic powders.

Page 11 200418204 V. Description of the invention (8) There is a certain relative relationship between the particle size of "body 1" and "brightness". Therefore, in order to achieve the best effect, the composite inorganic powder 1, the luminescent material 2 and the colloid 3 can be prepared according to the following steps and a certain mixing ratio, please refer to FIG. 3 to make the mixture of the present invention. : (101) First, a composite inorganic powder 1 (e.g. zinc oxide, titanium dioxide) having a size of 1 to 40 wt% (nanometer scale (1 to 500 nm)) and a light emitting material 2 (e.g., 40 wt%) : Fluorescent powder or phosphorescent powder), co-added in 20-98wt% of colloid 3 (such as epoxy resin); (1 0 2) the composite inorganic powder 1, the luminescent material 2 and the Colloid 3, uniformly mixed into a mixture; " (103) Hou Yuan 'takes the proper amount of the mixture again as needed,

The light-emitting diode structure 4 can be formed by coating on or around the surface of the light-emitting diode crystal grains 4. X By following the above steps and a certain mixing ratio, the mixture can be made colorless and transparent, and about 85% (as shown in Figures 1 and 2) of " visible light photons penetrate and can effectively reflect ultraviolet light Photo-photon 5, therefore, the Xi structure not only can make the light-emitting diode grains 4 emit brighter white light, but also reduce or avoid the ultraviolet photon 5 generated by it, and directly radiate directly to the human skin. phenomenon. Tian according to the above description is only one specific embodiment of the present invention. However, the manufacturing steps and structural features of the present invention are not limited to this. Those skilled in the art can add other compounds that can be easily considered (such as quick-drying agent, hardener, light diffusing agent, anti-settling agent, colorant, etc.) in the field of the present invention according to the contents of S technique disclosed in the present invention. , Or other solvents, etc.),

200418204 V. Description of the invention (9) can be covered by the following patents in this case. Page 13 200418204 Brief description of the drawings. Description of the drawings: Figure 1 is a schematic plan view of the present invention. Fig. 2 is a graph showing the relationship between the transmission ratio and the wavelength of the composite inorganic powder of the present invention. Fig. 3 is a manufacturing flow chart of the present invention. The main part of the symbol: composite inorganic powder ......... 1 luminescent material ............ 2 colloid ... ............ 3 Light-emitting diode grains ... ...... 4 Ultraviolet photons .............. 5 Inorganic powder ... ....... Insulating oxides ...... 12

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Claims (1)

200418204 VI. Application for patent scope 1. Structure of a light-emitting diode. The main material of the light-emitting diode includes a light-emitting material, a nanometer-scale composite inorganic powder, and _colloid ', wherein the composite inorganic powder, It includes at least one inorganic powder and at least one insulating oxide. These inorganic powders are nanometer-sized and can be decomposed into electrons and holes that can move freely when exposed to ultraviolet light. The halide has a smaller size than each of the inorganic powders and covers the surface of each of the inorganic powders. 2. A method for manufacturing a light-emitting diode. The main material of the light-emitting diode includes a light-emitting material, a nanometer-scale composite inorganic powder, and a colloid. The manufacturing method includes the following steps: 隹 First, The composite inorganic powder and the light-emitting material are respectively added to a colloid; 嗣, the composite inorganic powder, the light-emitting material and the colloid are uniformly mixed into a mixture; finally, according to actual needs, an appropriate amount of the mixture is taken ' After being coated or plated on the surface of or around the light-emitting diode grains; 后 After the mixture is coated or plated on the surface or around the light-emitting diode grains, the light-emitting material in the mixture may be The ultraviolet photons generated by the light-emitting diode grains are excited to generate visible light, and the composite inorganic powder suspended in the colloid in the mixture can reflect the remaining ultraviolet photons that cannot directly excite the light-emitting material. It also gives it the opportunity to excite the luminescent material again during the reflection process to produce visible light. 3. The structure as described in item 1 of the scope of the patent application, wherein the particle size of the composite inorganic powder is small ', mixed into the colloid, and coated on the light emitting diode 2 Page 15 200418204 6. Scope of patent application. When it is on the polar body, it can show colorless and transparent state, and it can reflect ultraviolet photons effectively, and make about 85% of visible light photons penetrate. 4. The structure as described in item 1 of the scope of patent application, wherein the particle size of the inorganic powder is about 1 to 50 nm. 5. The structure described in item 1 of the scope of the patent application, wherein the particle size of each of the insulating oxides is a nanometer scale of about 0.1 to 50 nm. 6. The manufacturing method as described in item 2 of the scope of patent application, wherein the mixing ratio of the composite inorganic powder is about 40 wt%. 7. The structure described in item 1 of the scope of patent application, wherein the composition of the luminescent material may be a fluorescent powder. 18. The structure described in item 1 of the scope of patent application, wherein the composition of the luminescent material may be phosphorescent powder. 9. The structure described in item 7 or 8 of the scope of patent application, wherein the components of the light-emitting material are formed by mixing the fluorescent powder and the phosphorescent powder with each other in a certain ratio. 10. The manufacturing method as described in item 2 of the scope of patent application, wherein the mixing ratio of the luminescent material is about 40% by weight. 11. The structure as described in item 1 of the scope of the patent application, wherein the colloidal component is a transparent cementing material that can evenly bond the composite inorganic powder and the luminescent material together. 1 2. The manufacturing method described in item 2 of the scope of patent application, wherein the mixing ratio of the colloid is about 20-98wt%. Page 16