WO2019107918A1 - Procédé de production d'un élément de conversion de couleurs de luminophores phosphorescents inclus dans du verre - Google Patents

Procédé de production d'un élément de conversion de couleurs de luminophores phosphorescents inclus dans du verre Download PDF

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Publication number
WO2019107918A1
WO2019107918A1 PCT/KR2018/014831 KR2018014831W WO2019107918A1 WO 2019107918 A1 WO2019107918 A1 WO 2019107918A1 KR 2018014831 W KR2018014831 W KR 2018014831W WO 2019107918 A1 WO2019107918 A1 WO 2019107918A1
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WIPO (PCT)
Prior art keywords
glass
green sheet
color conversion
conversion element
glass green
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PCT/KR2018/014831
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English (en)
Korean (ko)
Inventor
박태호
권광우
박재휘
이상근
Original Assignee
주식회사 베이스
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Application filed by 주식회사 베이스 filed Critical 주식회사 베이스
Publication of WO2019107918A1 publication Critical patent/WO2019107918A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements

Definitions

  • the present invention relates to a method of manufacturing a PIG color conversion element, and more particularly, to a method of manufacturing a PIG color conversion element in which a phosphor is not exposed on a surface.
  • An element for converting the color of light emitted from a light emitting device such as a light emitting diode (LED) is a device in which a phosphor, an organic material, or a phosphor is dispersed in a glass.
  • the PIG (Phosphor in Glass) color conversion element in which the phosphor is dispersed in glass has less problems of deterioration due to high temperature than the color conversion element in which the phosphor or the organic material is mixed with the phosphor, and has excellent resistance to gas and moisture penetration And the range of applications including LED applications requiring high reliability is gradually widening.
  • the PIG color conversion element can be manufactured by mixing a phosphor with a glass frit, molding the phosphor into a plate form, and firing the phosphor.
  • this manufacturing method it is practically impossible to uniformize the distribution of the phosphors in the PIG color conversion element depending on the specific gravity and particle size of the phosphor and the glass, process parameters, and other environmental influences,
  • the phosphor may be exposed on the surface of the color conversion element.
  • the PIG color conversion device requires processes such as hole processing, surface processing, and cutting depending on the types of LED chips and LED packages used. At this time, if the phosphor is exposed on the surface of the PIG color conversion element, the phosphor exposed on the surface may be dropped during the processes such as hole processing, surface processing, cutting, and the like.
  • a step of preparing a first glass green sheet formed of a glass slurry and a second glass green sheet formed of a glass slurry not containing a phosphor, respectively, as a manufacturing method of a PIG color conversion element according to an embodiment of the present invention 1) laminating a second glass green sheet on each side of the glass green sheet, pressing the laminate of the first glass green sheet and the second glass green sheet, and firing the pressed laminate.
  • a plurality of first glass green sheets can be laminated between the second glass green sheets.
  • the composition of the glass frit contained in the glass slurry forming the first glass green sheet and the glass frit included in the glass slurry forming the second glass green sheet may be the same.
  • the processing of the pressed laminate according to an embodiment of the present invention may include hole machining or cutting.
  • the thickness of the first glass green sheet according to an embodiment of the present invention may be 10 to 200 ⁇ ⁇ .
  • the second glass green sheet not including the phosphor is disposed on both sides of the first glass green sheet including the phosphor, the phosphor is not exposed on the surface of the phosphor, It is possible to prevent the problem of dropping the phosphor.
  • the phosphor is prevented from falling off, the light emitting efficiency and yield of the LED package using the PIG color conversion element can be improved.
  • FIG. 1 is a cross-sectional view of a PIG color conversion element according to an embodiment of the present invention.
  • FIG. 2 is a view showing the surface states of the PIG color conversion element according to an embodiment of the present invention and the PIG color conversion element according to a comparative example.
  • FIG. 3 is a view sequentially illustrating a manufacturing process of a PIG color conversion element according to an embodiment of the present invention.
  • FIG. 4 is a diagram showing the results of measurement of color coordinate spread in an LED package using a PIG color conversion element according to an embodiment of the present invention and a PIG color conversion element according to a comparative example.
  • the PIG color conversion element 100 includes a first glass green sheet 110, And a second glass green sheet 120 as shown in FIG.
  • the first glass green sheet 110 of the PIG color conversion element 100 may be formed by dispersing the fluorescent material 113 in the base material 111 formed of glass frit.
  • the phosphor 113 is used for color conversion of light emitted from the LED chip.
  • a YAG, LuAg, TAG, silicate, SiAlON, BOS, CaSiN, Rye system, KSF system, and the like can be used.
  • the glass frit component having a firing temperature suitable for each phosphor in order to exhibit the optimum color conversion efficiency.
  • the YAG fluorescent material is used as the fluorescent material 113 of the first glass green sheet 110
  • the components of the glass frit are not limited thereto, and suitable components among known components can be selected depending on the light transmittance, the firing temperature, the shape of the PIG color conversion element, the intended use, and the like.
  • the second glass green sheet 120 of the PIG color conversion element 100 may be formed of glass that does not include a phosphor, unlike the first glass green sheet 110.
  • the glass frit constituting the second glass green sheet 120 is preferably the same as the glass frit component of the first glass green sheet 110 in consideration of firing conditions, but the present invention is not limited thereto
  • the glass frit component constituting the second glass green sheet 120 can be selected from suitable components among known components.
  • a pair of second glass green sheets 120 are formed on both surfaces (upper and lower surfaces in the drawing) of the first glass green sheet 110, As shown in FIG.
  • the second glass green sheet 120 is formed on the first glass green sheet 110 even if the fluorescent material 113 is exposed on the surface of the first glass green sheet 110 in the process of manufacturing the first glass green sheet 110.
  • the phosphor is not exposed on the surface of the PIG color conversion element 100.
  • the phosphor 13 dispersedly disposed on the base material 11 composed of glass frit is exposed on the surface.
  • bubbles 15 are also formed on the surface of the PIG color conversion element 10 (see FIG. 2 (a)).
  • the second glass green sheet not including the phosphor functions as a cover glass, 100) (see Fig. 2 (b)).
  • the phosphor is not exposed on the surface and bubbles are not formed. Therefore, even if the PIG color conversion element 100 is subjected to hole processing, surface processing, or cutting, it is possible to prevent the phosphor from being dropped or damaged during such a processing step, and to have a smooth surface before and after processing. This not only leads to improvement in the yield of the PIG color conversion element, but also improves the luminous efficiency of the LED package using the PIG color conversion element.
  • a first glass green sheet 110 and a second glass green sheet 120 are prepared (S110).
  • the first glass green sheet 110 may be made of a glass slurry comprising a glass frit, a phosphor, a binder resin, and a solvent.
  • the glass slurry may contain 0.1 to 50 wt% of the phosphor, 0.5 to 50 wt% of the binder resin, and the remaining glass frit, and the solvent is volatilized and removed in the drying process.
  • the composition ratio of each component is not limited thereto.
  • Each prepared glass slurry may be formed into a first glass green sheet 110 and a second glass green sheet 120 by a method such as tape casting molding, injection molding, extrusion molding, press molding, screen printing or the like.
  • the glass slurry may be applied to the carrier film to be transported in one direction to a constant thickness, then dried while passing through a dryer to be formed into a respective glass green sheet.
  • the thickness of the first glass green sheet 110 may be 10 to 200 mu m.
  • the thickness of the first glass green sheet 110 is less than 10 ⁇ , the average particle size of the fluorescent material becomes smaller than the average particle size of the fluorescent material.
  • the thickness of the first glass green sheet 110 is greater than 200 ⁇ , So that it is difficult to uniformly arrange the distribution of the phosphor.
  • first glass green sheet 110 and the second glass green sheet 120 may be laminated in such a manner that both surfaces of the first glass green sheet 110 are covered with the second glass green sheet 120, 120 have the same size, that is, the same area.
  • the second glass green sheets are laminated on both sides of the first glass green sheet, they are pressed in the lamination direction (S130).
  • the pressing of the laminate of the first glass green sheet 110 and the second glass green sheet 120 can be carried out at 20 to 200 DEG C using an ISO press or a uni-axial press have.
  • a laminate of the first glass green sheet and the second glass green sheet is squeezed and then sintered (S140).
  • firing can be performed at 150 ° C to 1,000 ° C.
  • the specific firing temperature may vary depending on the softening temperature of the glass composition.
  • the firing temperature is lower than 150 ° C (that is, when the firing temperature is lower than the softening behavior temperature)
  • the light transmittance and the light extraction efficiency may be lowered.
  • the firing temperature is higher than 1,000 ° C. (that is, when the firing temperature is excessively higher than the softening behavior temperature)
  • the shape can not be controlled and the phosphor may be deteriorated to decrease the luminous efficiency.
  • the firing is carried out in the order of elevated temperature, holding and cooling, wherein the firing holding time is preferably 5 to 120 minutes. If the firing holding time is less than 5 minutes, the firing may not be sufficient. If the firing holding time exceeds 120 minutes, the phosphor properties may be deteriorated due to the reaction between the phosphor and the glass frit and excessive shape distortion, have.
  • the PIG color conversion element may require processes such as hole processing, surface processing, and cutting depending on the type of the LED chip and the LED package to be used.
  • processes such as hole processing, surface processing, cutting, and the like are generally performed after firing.
  • precision processing itself is difficult due to inherent characteristics of glass, that is, high brittleness and high hardness, and cracking of glass may occur during processing, and subsequent processing such as polishing must be followed And is not economical in terms of cost.
  • the laminated body of the first glass green sheet 110 and the second glass green sheet 120 may be pressed and then subjected to processes such as hole processing, surface processing, cutting, and the like necessary before firing.
  • processes such as hole processing, surface processing, cutting, and the like necessary before firing.
  • the slurry viscosity before firing is less than 10 2 poise, the shape may collapse during tape casting and post-processing. If the pre-firing viscosity is higher than 10 5 poise, the uniformity of the tape casting process is lowered. It is difficult to control the shape of the substrate.
  • the steps of hole processing, surface finishing, cutting, and the like are performed before firing, but the present invention is not necessarily limited to this, and firing may be performed first, Processing, cutting, and the like may be performed.
  • one or a plurality of first glass green sheets 110 containing phosphors are disposed between a pair of second glass green sheets 120 , Even if the phosphor is exposed on the surface of the first glass green sheet 110 or bubbles are formed on the surface thereof during the manufacturing process of the first glass green sheet 110, Or bubbles may not be exposed to the surface. That is, according to an embodiment of the present invention, the second glass green sheet 120 serves as a cover sheet of the first glass green sheet 110 containing the phosphor to prevent the phosphor from being exposed on the surface, It is possible to prevent the phosphors from falling off, thereby improving the luminous efficiency.
  • the PIG color conversion element 100 by manufacturing the PIG color conversion element 100 in such a manner that at least one first glass green sheet 110 and a second glass green sheet 120 are laminated,
  • the thickness of the PIG color conversion element 100 can be easily controlled by adjusting the thickness of the green sheet or adjusting the number of glass green sheets to be laminated.
  • a PIG color conversion element is manufactured by laminating and pressing a second glass green sheet containing no phosphor on both surfaces of a first glass green sheet containing a phosphor and then sintering the same.
  • the PIG color conversion element was manufactured by firing a glass green sheet containing a phosphor.
  • borosilicate glass having an optimum firing temperature of 650 ° C ⁇ 20 ° C was used as the glass frit used in the production of the glass green sheet.
  • a phosphor a combination of LuAG and amber phosphors was used, and 30 wt% of the glass frit was blended.
  • Table 1 shows the results of measurement of the color coordinate spread of each of the LED package using the PIG color conversion element according to the embodiment of the present invention and the PIG color conversion element according to the comparative example.
  • 4 shows the results of Table 1 on the coordinates.
  • the distribution at the upper right end and the distribution at the lower left end in FIG. 4 are the PIG color conversion element according to the embodiment of the present invention and the PIG color conversion element according to the comparative example, Shows the distribution of color coordinates of the LED package using the conversion element.
  • the color distribution of the LED package using the PIG color conversion element according to an embodiment of the present invention is significantly smaller than that of the LED package using the PIG color conversion element according to the comparative example .
  • Table 2 shows the result of measuring the light efficiency of each of the PIG color conversion element according to the embodiment of the present invention and the LED package using the PIG color conversion element according to the comparative example .
  • the light efficiency of the LED package using the PIG color conversion element according to an embodiment of the present invention is improved by about 14.3% as compared with the LED package using the PIG color conversion element according to the comparative example. This is because in the PIG color conversion element according to an embodiment of the present invention, both sides of the glass sheet (i.e., the first glass green sheet) containing the phosphor with the cover glass sheet (i.e., the second glass green sheet) It is possible to maintain the smooth surface without dropping off the phosphor because it is processed and fired after covering.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Led Device Packages (AREA)
  • Luminescent Compositions (AREA)

Abstract

L'invention concerne un procédé de production d'un élément de conversion de couleurs PIG. Selon un mode de réalisation de l'invention, un procédé de production d'un élément de conversion de couleurs PIG comprend: une étape de préparation de chacune d'une première feuille verte de verre formée à l'aide d'une pate de verre comprenant des luminophores, et des secondes feuilles vertes de verre formées à l'aide d'une pate de verre exempte de luminophores; une étape de stratification des secondes feuilles vertes de verre sur les deux côtés de la première feuille verte de verre; une étape de compression du stratifié de la première feuille verte de verre et des secondes feuilles vertes de verre; et une étape de cuisson du stratifié comprimé.
PCT/KR2018/014831 2017-11-28 2018-11-28 Procédé de production d'un élément de conversion de couleurs de luminophores phosphorescents inclus dans du verre WO2019107918A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20170161037 2017-11-28
KR10-2017-0161037 2017-11-28
KR10-2018-0106734 2017-11-28
KR20180106734 2018-09-06

Publications (1)

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WO2019107918A1 true WO2019107918A1 (fr) 2019-06-06

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WO (1) WO2019107918A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060002183A (ko) * 2004-07-01 2006-01-09 임욱 무수축 다층 세라믹 기판 및 그 제조 방법
JP2007048864A (ja) * 2005-08-09 2007-02-22 Nippon Electric Glass Co Ltd 蛍光体複合材料
JP2008169348A (ja) * 2007-01-15 2008-07-24 Nippon Electric Glass Co Ltd 蛍光体複合材料
KR101253381B1 (ko) * 2005-05-11 2013-04-11 니폰 덴키 가라스 가부시키가이샤 형광체 복합 유리, 형광체 복합 유리 그린 시트 및 형광체 복합 유리의 제조 방법
JP2016027613A (ja) * 2014-05-21 2016-02-18 日本電気硝子株式会社 波長変換部材及びそれを用いた発光装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016208851A1 (fr) * 2015-06-23 2016-12-29 주식회사 베이스 Procédé de fabrication de verre pour diodes led

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060002183A (ko) * 2004-07-01 2006-01-09 임욱 무수축 다층 세라믹 기판 및 그 제조 방법
KR101253381B1 (ko) * 2005-05-11 2013-04-11 니폰 덴키 가라스 가부시키가이샤 형광체 복합 유리, 형광체 복합 유리 그린 시트 및 형광체 복합 유리의 제조 방법
JP2007048864A (ja) * 2005-08-09 2007-02-22 Nippon Electric Glass Co Ltd 蛍光体複合材料
JP2008169348A (ja) * 2007-01-15 2008-07-24 Nippon Electric Glass Co Ltd 蛍光体複合材料
JP2016027613A (ja) * 2014-05-21 2016-02-18 日本電気硝子株式会社 波長変換部材及びそれを用いた発光装置

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TW201925131A (zh) 2019-07-01
TWI689474B (zh) 2020-04-01

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