WO2012014679A1 - 発光装置の製造方法、発光装置及び反射体 - Google Patents
発光装置の製造方法、発光装置及び反射体 Download PDFInfo
- Publication number
- WO2012014679A1 WO2012014679A1 PCT/JP2011/065988 JP2011065988W WO2012014679A1 WO 2012014679 A1 WO2012014679 A1 WO 2012014679A1 JP 2011065988 W JP2011065988 W JP 2011065988W WO 2012014679 A1 WO2012014679 A1 WO 2012014679A1
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- WO
- WIPO (PCT)
- Prior art keywords
- reflector
- light emitting
- emitting device
- circuit board
- inorganic filler
- Prior art date
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Images
Classifications
-
- 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
- H01L33/58—Optical field-shaping elements
- H01L33/60—Reflective elements
-
- 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
Definitions
- the present invention relates to a method for manufacturing a light emitting device, a light emitting device, and a reflector.
- the light emitting device described in Patent Document 1 includes a circuit board on which an LED (Light Emitting Diode) element (light emitting element) as a light source is mounted, and a light that is provided on the printed board and reflects light from the LED element. And a reflector (reflector).
- the reflector is made of a metal material, and is fixed on the circuit board with a resin adhesive.
- the reflector is also required to be reduced in size and weight.
- the current reflector is made of a metal material, and it is difficult to easily reduce the size and weight. Therefore, as described in Patent Document 2, it is conceivable to manufacture a reflector made of a resin material. Since the resin material has characteristics such as easy molding, it is considered that a reflector having a reduced size and weight can be easily manufactured.
- Patent Document 2 describes that a reflector is manufactured using a thermosetting resin as a raw material.
- the reflector described in Patent Document 2 has a problem that the dimensions are not stable due to curing shrinkage. Even when it is used with a thermoplastic resin, the resin shrinks due to cooling after molding, so that a reflector having a stable dimension cannot be obtained as in the case of using a thermosetting resin. There is a tendency.
- a liquid crystalline resin is known as a resin having a small shrinkage after molding. It is considered that a reflector having a stable dimension can be obtained by molding a reflector using a liquid crystalline resin as a raw material and forming a metal layer on the surface of the molded body.
- the reflector is exposed to a high temperature during the manufacturing process of the light emitting device. For this reason, when using liquid crystalline resin as a raw material of a reflector, it is necessary to add an inorganic filler to liquid crystalline resin and to improve heat resistance.
- the surface of the reflector is roughened. If the surface of the reflector is rough, a metal layer for reflecting the light from the LED element cannot be formed smoothly on the reflector. As a result, the reflector cannot efficiently reflect the light from the LED element.
- the present invention has been made in order to solve the above-described problems.
- the object of the present invention is to provide a reflector having a smooth surface and a reflector using a liquid crystalline resin composition in which an inorganic filler is blended with a liquid crystalline resin. It is in providing the method of manufacturing.
- the inventors of the present invention have made extensive studies to solve the above problems.
- the reflector is manufactured so that the difference ( ⁇ Ra) between the surface roughness Ra of the reflector and the surface roughness Ra of the inner wall surface of the mold for manufacturing the reflector is 0.1 mm or less.
- ⁇ Ra the difference between the surface roughness Ra of the reflector and the surface roughness Ra of the inner wall surface of the mold for manufacturing the reflector.
- a method of manufacturing a light emitting device having an inclined surface for reflecting in a desired direction, a reflector manufacturing process for manufacturing a reflector from a liquid crystalline resin composition, and the reflector obtained in the reflector manufacturing process A metal layer forming step of forming a metal layer with respect to the inclined surface, a light emitting element mounting step of mounting a light emitting element on the circuit board, and a reflector arrangement step of arranging a reflector on the circuit board, In the reflector manufacturing process, the difference ( ⁇ Ra) between the surface roughness Ra of the reflector and the surface roughness Ra of the inner wall surface of the mold for manufacturing the reflector is 0.1 mm or less.
- the manufacturing method of the light-emitting device which is the process of manufacturing a reflector.
- a light-emitting device including an inorganic filler having an average primary particle size of 15 ⁇ m or less, and a metal layer disposed on a surface of the reflector.
- a reflector including a liquid crystalline resin and an inorganic filler having an average primary particle size of 15 ⁇ m or less and having a metal layer on the surface.
- a reflector having a smooth surface can be obtained even when a liquid crystalline resin composition in which an inorganic filler is blended with a liquid crystalline resin is used.
- the metal layer formed on the inclined surface also becomes smooth, and light from the light emitting layer can be efficiently reflected.
- the surface of the reflector is hardly fibrillated.
- the metal layer formed on the surface of the reflector does not peel off due to fibrillation of the surface of the reflector. Therefore, the adhesion between the metal layer and the reflector surface is very high.
- FIG. 1 is a perspective view schematically showing a light emitting device 1 of the present invention.
- 2A and 2B are diagrams schematically showing the reflector 12 of the present invention, in which FIG. 2A is a perspective view of the reflector 12, and FIG. 2B is a sectional view taken along line XX in FIG.
- the light emitting device 1 of the present invention includes a circuit board 10, a light emitting element 11, and a reflector 12. As shown in FIG. 1, in the light emitting device 1, a light emitting element 11 is disposed on one surface of a circuit board 10, and a reflector 12 is disposed so as to surround the light emitting element 11.
- the circuit board 10 has a plurality of electrode layers (not shown) formed on the upper surface and the lower surface of an insulating base made of glass epoxy, liquid crystal resin, or the like.
- the light emitting element 11 is disposed on one surface of the circuit board 10.
- the number of the light emitting elements 11 is not particularly limited, and one or a plurality of light emitting elements can be arranged on one surface of the circuit board.
- the light emitting element 11 includes an electrode part (not shown), and this electrode part is electrically connected to the electrode layer of the circuit board 10. When a voltage is applied to the electrode layer, a current flows through the light emitting element 11 due to this electrical connection, and the light emitting element 11 emits light.
- the reflector 12 is a plate-like component molded using a mold, and is disposed on the circuit board 10 so that the bottom surface and one surface of the circuit board 10 are joined.
- the reflector 12 includes an opening 120 that penetrates the bottom surface and the top surface, an inclined surface 121 that reflects light from the light emitting element, and a metal layer 122 formed on the surface.
- the metal layer 122 should just be provided in the inclined surface 121 at least, and may be provided in parts other than the inclined surface 121 of a reflector surface further.
- the opening 120 is circular in a plan view and is formed so as to expand in a tapered shape from the bottom surface to the top surface.
- the inclined surface 121 is the inner surface of the opening 120. As described above, since the opening 120 is formed so as to taper from the bottom surface toward the top surface, the inclined surface 121 is inclined with respect to one surface of the circuit board 10. Since the inclined surface is inclined, the metal layer 122 formed on the inclined surface 121 can efficiently reflect light from the light emitting element upward. Here, the desired direction in which the reflected light travels is upward (perpendicular to one surface of the circuit board 10), but in order to reflect the reflected light in a direction other than the upward direction, the reflected light is adjusted by adjusting the tilt angle. You may adjust the direction.
- the reflector 12 is formed so that the difference ( ⁇ Ra) between the surface roughness Ra of the reflector and the surface roughness Ra of the inner wall surface of the mold for manufacturing the reflector is 0.1 mm or less.
- the difference ( ⁇ Ra) in the surface roughness Ra becomes small as described above, it means that the surface of the reflector 12 becomes smooth.
- the inclined surface 121 that is a part of the surface of the reflector also becomes smooth.
- the surface of the metal layer 122 formed on the smooth inclined surface 121 is also smooth.
- the reflectance is improved, and light from the light-emitting element can be reflected more efficiently.
- the present invention is characterized by the reflector 12.
- the material used for the reflector 12 will be described in more detail.
- the reflector 12 used in the light emitting device 1 of the present invention is made of a liquid crystalline resin composition containing a liquid crystalline resin and an inorganic filler.
- a liquid crystalline resin composition containing a liquid crystalline resin and an inorganic filler.
- the reflector 12 having a stable dimension can be obtained by using the liquid crystalline resin. Since the liquid crystalline resin has high fluidity, the reflector 12 can be easily reduced in size and thickness.
- the liquid crystalline resin used in the present invention refers to a melt processable polymer having a property capable of forming an optically anisotropic molten phase.
- the property of the anisotropic molten phase can be confirmed by a conventional polarization inspection method using an orthogonal polarizer. More specifically, the anisotropic molten phase can be confirmed by using a Leitz polarizing microscope and observing a molten sample placed on a Leitz hot stage under a nitrogen atmosphere at a magnification of 40 times.
- the liquid crystalline resin applicable to the present invention is inspected between crossed polarizers, the polarized light is normally transmitted even in a molten stationary state, and optically anisotropic.
- the liquid crystalline resin as described above is not particularly limited, but is preferably an aromatic polyester or an aromatic polyester amide, and a polyester partially including an aromatic polyester or an aromatic polyester amide in the same molecular chain is also within the range. It is in. They preferably have a logarithmic viscosity (IV) of at least about 2.0 dl / g, more preferably 2.0-10.0 dl / g when dissolved in pentafluorophenol at 60 ° C. at a concentration of 0.1% by weight. .) Are used.
- IV logarithmic viscosity
- the aromatic polyester or aromatic polyester amide as the liquid crystalline resin applicable to the present invention is particularly preferably at least one compound selected from the group of aromatic hydroxycarboxylic acids, aromatic hydroxyamines, and aromatic diamines. Aromatic polyesters and aromatic polyester amides as constituent components.
- a polyester amide comprising one or more of aromatic dicarboxylic acid, alicyclic dicarboxylic acid and derivatives thereof; (4) mainly (a) one or more of aromatic hydroxycarboxylic acids and derivatives thereof; (b) one or more of aromatic hydroxyamines, aromatic diamines and derivatives thereof; and (c). One or more of aromatic dicarboxylic acid, alicyclic dicarboxylic acid and derivatives thereof, and (d) at least one or more of aromatic diol, alicyclic diol, aliphatic diol and derivatives thereof, and And polyester amides composed of Furthermore, you may use a molecular weight modifier together with said structural component as needed.
- Specific examples of the specific compound constituting the liquid crystalline resin applicable to the present invention include aromatic hydroxycarboxylic acids such as p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid, 2,6-dihydroxynaphthalene, 1,4-dihydroxynaphthalene, 4,4′-dihydroxybiphenyl, hydroquinone, resorcin, aromatic diols such as compounds represented by the following general formula (I) and the following general formula (II); terephthalic acid, isophthalic acid, 4 , 4′-diphenyldicarboxylic acid, 2,6-naphthalenedicarboxylic acid and aromatic dicarboxylic acids such as compounds represented by the following general formula (III); aromatic amines such as p-aminophenol and p-phenylenediamine Can be mentioned.
- aromatic hydroxycarboxylic acids such as p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid, 2,6-d
- X a group selected from alkylene (C1 to C4), alkylidene, —O—, —SO—, —SO 2 —, —S—, and —CO—
- the inorganic filler is added to improve physical properties such as heat resistance of the liquid crystalline resin composition and to form a metal layer having good adhesion.
- the inorganic filler can also impart physical properties such as heat resistance to the reflector 12.
- the kind of inorganic filler is not particularly limited, some inorganic fillers have no effect of preventing fuzz on the surface of the molded body. In a molded product with a fluffy surface, when the metal layer is formed on the surface of the molded product, the metal layer and the molded product surface tend to be insufficiently adhered. When the layer is formed, the adhesion between the metal layer and the molded body surface is strong.
- the inorganic filler is selected so that the difference ( ⁇ Ra) between the surface roughness Ra of the reflector and the surface roughness Ra of the inner wall surface of the mold for manufacturing the reflector is 0.1 mm or less.
- An inorganic filler is appropriately selected according to the type of liquid crystalline resin and the size of the inorganic filler so that the difference ( ⁇ Ra) in the surface roughness Ra is 0.1 mm or less. Specifically, it selects from general inorganic fillers, such as a fibrous filler, a granular filler, and a plate-like filler.
- Granular fillers include silica, quartz powder, glass beads, milled glass fiber, glass balloon, glass powder, calcium silicate, aluminum silicate, kaolin, talc, clay, diatomaceous earth, silicates such as wollastonite, iron oxide, Metal oxides such as titanium oxide, zinc oxide, antimony trioxide, and alumina, carbonates of metals such as calcium carbonate and magnesium carbonate, sulfates of metals such as calcium sulfate and barium sulfate, other ferrites, silicon carbide, silicon nitride , Boron nitride, various metal powders, and the like.
- the plate filler include mica, glass flakes, various metal foils, and the like. Of these, silica and talc are most preferable.
- a granular filler having a small average primary particle diameter and a plate filler having a small average primary particle diameter means 15 ⁇ m or less.
- An average primary particle size of 15 ⁇ m or less is preferred because the decrease in fluidity of the liquid crystalline resin composition due to the inclusion of the inorganic filler is small.
- silica when used as the inorganic filler, those having an average primary particle size of 0.7 ⁇ m or less are particularly preferable.
- the inorganic filler in which the difference ( ⁇ Ra) in the surface roughness Ra is likely to be 0.1 mm or less has been described.
- the difference in surface roughness ( ⁇ Ra) of 0.1 mm or less refers to a state in which the surface characteristics of the reflector are greatly improved.
- the surface of the reflector 12 becomes smooth
- the inclined surface 121 which is a part of the surface of the reflector 12 becomes smooth
- the metal layer 122 formed on the reflector 12 also becomes smooth.
- the light emitting device 1 of the present invention can efficiently reflect the light from the light emitting element 11 on the surface of the metal layer 122 formed on the inclined surface 121. Further, even when the reflector 12 is ultrasonically cleaned, the surface of the reflector 12 is hardly fibrillated. That is, the reflector 12 is unlikely to become fluffy on the surface of the reflector. As a result, it is possible to form a metal layer with good adhesion on the reflector surface.
- the surface of the reflector 12 becomes very smooth.
- the difference ( ⁇ Ra) in the surface roughness Ra is 0.03 mm or less, the light from the light emitting element 11 can be reflected more efficiently on the surface of the metal layer 122, and the fluffing on the surface of the reflector is further suppressed. It becomes easy.
- silica having an average primary particle size of 0.7 ⁇ m or less a plate-like filler having an average primary particle size of 2.0 ⁇ m or less, or a powder filler having an average primary particle size of 2.0 ⁇ m or less as an inorganic filler, It becomes easy to adjust the difference ( ⁇ Ra) in the surface roughness Ra to 0.03 mm or less.
- content of the inorganic filler in the reflector 12 will be described.
- content of the inorganic filler in the reflector 12 is not specifically limited, It is preferable that they are 5 mass parts or more and 70 mass parts or less with respect to 100 mass parts of liquid crystalline resin. If the content of the inorganic filler is 5 parts by mass or more, it is preferable because it can be stably molded and desired physical properties (particularly heat resistance and fluidity) can be easily imparted. On the other hand, when the content of the inorganic filler is 70 parts by mass or less, it is preferable because the above-described merit (for example, fluidity and dimensional stability) of using the liquid crystalline resin is easily obtained.
- a more preferable content of the inorganic filler is 15 parts by mass or more and 60 parts by mass or less per 100 parts by mass of the liquid crystalline resin. If it is the said preferable range, a liquid crystalline resin composition has sufficient fluidity
- the flowability of the liquid crystalline resin composition is not particularly limited.
- the melt viscosity measured by the method described in the examples is 5 Pa ⁇ s to 50 Pa ⁇ s. Is preferred.
- the heat resistance of the liquid crystalline resin composition is not particularly limited.
- the deflection temperature under load measured by the method described in the examples is 200 ° C. or higher and 400 ° C. or lower.
- it is more preferably 250 ° C. or higher and 350 ° C. or lower.
- the liquid crystalline resin may be obtained by polymer blending with another thermoplastic resin as long as the effects of the present invention are not impaired.
- the thermoplastic resin used in this case is not particularly limited.
- an aromatic polyester comprising a polyolefin such as polyethylene or polypropylene, an aromatic dicarboxylic acid such as polyethylene terephthalate or polybutylene terephthalate, and a diol or oxycarboxylic acid.
- Polyacetal homo or copolymer
- polystyrene polyvinyl chloride
- polyamide polycarbonate
- ABS polyoxyphenylene oxide
- polyoxyphenylene sulfide fluororesin and the like.
- thermoplastic resins can be used in combination of two or more. These resins have various additives, reinforcing agents, stabilizers, antioxidants, pigments as necessary to improve various properties such as mechanical, electrical, chemical properties and flame retardancy. Etc. can be added.
- a method for manufacturing a light emitting device of the present invention includes a circuit board 10, a light emitting element 11 mounted on the circuit board 10, and a reflector 12 disposed on the circuit board 10 so as to surround the light emitting element 11. It is a manufacturing method of the light-emitting device 1, and includes a reflector manufacturing process, a metal layer forming process, a light emitting element mounting process, and a reflector arranging process. Hereinafter, each step will be described.
- the reflector 12 is manufactured from the liquid crystalline resin composition.
- the manufacturing method of the reflector 12 is not particularly limited as long as it is a method of forming using a mold, and a general forming method using a mold can be adopted.
- the reflector 12 can be manufactured by an injection molding method.
- the metal layer 122 is formed on the surface of the reflector 12 obtained in the reflector manufacturing step.
- various metals such as aluminum, silver, chromium, nickel, palladium, platinum, and gold can be used as raw materials.
- the formation method of the metal layer 122 is not particularly limited, and any of a wet process typified by metal plating and a dry process typified by a vacuum deposition method, a sputtering method, and an ion plating method can be employed. These metal layers 122 may be formed as appropriate depending on the type of metal used as a raw material for the metal layer 122 and the like.
- the metal layer 122 is formed on the surface of the reflector 12 obtained in the reflector manufacturing step.
- various metals such as aluminum, silver, chromium, nickel, palladium, platinum, and gold can be used as raw materials.
- the formation method of the metal layer 122 is not particularly limited, and any of a wet process typified by metal plating and a dry process typified by a vacuum deposition method, a sputtering method, and an ion plating method can be employed. These metal layers 122 may be formed as appropriate depending on the type of metal used as a raw material for the metal layer 122 and the like.
- the light emitting element 11 is arranged near the center on the one surface on which the electrode layer of the circuit board 10 is formed. Specifically, the light emitting element 11 is fixed on one surface of the circuit board 10 with an adhesive or the like, the electrode portion of the light emitting element 11 and the electrode layer are electrically connected, and the light emitting element 11 is connected to the circuit board 10. Mount on top.
- the reflector 12 is placed on the circuit board 10.
- the reflector 12 is arranged on the circuit board so that the end face on the bottom surface side of the reflector 12 is in contact with one surface of the circuit board 10 and the light emitting element 11 and the electrode layer are surrounded by an inclined surface.
- the reflector 12 is fixed on one surface of the circuit board with an adhesive or the like.
- Liquid crystalline resin Vectra E950iSX (manufactured by Polyplastics) Glass fiber: ECS03T-786H (manufactured by Nippon Electric Glass Co., Ltd.), fiber diameter 10.5 ⁇ m (The fiber length of glass fiber described later was adjusted by extrusion conditions (screw rotation speed, cylinder temperature).)
- True spherical silica 1 Admafine SO-C2 (manufactured by Admatechs), average primary particle size 0.5 ⁇ m
- Spherical silica 2 Denka fused silica FB-5S DC (manufactured by Denki Kagaku Kogyo Co., Ltd.), average primary particle size 4.0 ⁇ m Glass beads: EGB731 (Potters Barotini Co., Ltd.) average primary particle size 18 ⁇ m Talc: Crown Talc PP (Matsumura Sangyo Co., Ltd.) average primary particle size 11 ⁇ m Neuburg Siricius Earth:
- a liquid crystalline resin composition was prepared by adding the inorganic filler shown in Tables 1 and 2 in the addition amount (parts by mass) shown in Tables 1 and 2 with respect to 100 parts by mass of the liquid crystalline resin.
- the surface roughness Ra of the inclined surface was measured using a super depth color 3D shape measuring microscope VK-9500 (manufactured by Keyence Corporation) with respect to the central portion of the reflector cut in half in the direction in which the opening penetrates.
- the surface roughness Ra of the mold was also measured by the same method as that for the molded body.
- Tables 1 and 2 show the surface roughness of the inclined surfaces of the reflectors of Examples and Comparative Examples. Further, the surface roughness of the inner wall surface of the mold corresponding to the inclined surface was 0.25 mm, and the difference in surface roughness ( ⁇ Ra) for the examples and comparative examples is also shown in Tables 1 and 2.
- ⁇ Formation of metal layer> First, using a sputtering apparatus (E102 manufactured by Hitachi, Ltd.), the inside of the vacuum chamber was evacuated to 0.05 Torr. Next, the current value was set to 15 mA. Finally, using a platinum palladium target, sputtering was performed on the reflector set on the substrate so as to be 30 mm from the target, thereby forming a platinum palladium film. As a result, a reflector having a metal layer formed on the entire surface was obtained. For all examples and comparative examples, a reflector having a metal layer formed on the surface was obtained by the above method. The smoothness of the surface of the metal layer was uniform.
- the reflectance of the metal layer surface formed on the reflector was difficult to measure because the reflector was too small. Therefore, an 80 mm ⁇ 80 mm ⁇ 1 mm injection-molded test piece was prepared from the liquid crystalline resin composition used in the production of the examples and comparative examples, and the reflectance of the metal layer formed on the injection-molded test piece was measured. did.
- the metal layer was formed by the same method as that formed on the reflector.
- the mold for producing the test piece the one having the inner wall surface roughness Ra of 0.25 mm was used as in the above-described example.
- the smoothness of the surface of the obtained injection-molded test piece was uniform. Therefore, the surface roughness Ra was measured by the above-described method for the central portion of the surface of the injection molded test piece.
- the measurement results were the same as the surface roughness of the reflectors of Examples and Comparative Examples obtained using the same composition in all the injection molded test pieces.
- For each injection-molded test piece using a V-570 type ultraviolet spectrophotometer (manufactured by JASCO Corporation) with respect to the surface on the metal layer side of the upper surface of the center part of the injection-molded test piece on which the metal layer is formed The reflectance was measured with light having a wavelength of 470 nm. The measurement results are shown in Tables 1 and 2.
- the metal formed on the reflector is made by setting the difference ( ⁇ Ra) between the surface roughness of the reflector and the surface roughness of the inner wall surface of the mold to 0.1 mm or less.
- the layer was confirmed to reflect light efficiently. It was confirmed from Examples 1 to 8 that this effect was achieved regardless of the type of inorganic filler. In addition, it was confirmed from Examples 1 to 4 and Example 5 that this effect is exhibited regardless of the size of the inorganic filler. Moreover, from the results of Examples and Comparative Examples, it was confirmed that the difference in surface roughness ( ⁇ Ra) can be easily adjusted to 0.1 mm or less when a plate-like filler or a granular filler is used as the inorganic filler.
- melt viscosity can be adjusted to a low melt viscosity of about 30 Pa ⁇ s to 40 Pa ⁇ s.
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Abstract
Description
図1は本発明の発光装置1を模式的に示した斜視図である。図2は、本発明の反射体12を模式的に示す図であり、(a)は反射体12の斜視図であり、(b)は(a)におけるXX線断面図である。
以下、反射体12に使用する材料について、さらに詳細に説明する。
液晶性樹脂は高い寸法安定性を有するため、液晶性樹脂を使用することで寸法の安定した反射体12を得ることができる。そして、液晶性樹脂は高い流動性を有するため、反射体12の小型化、薄型化も容易に行うことができる。
(1)主として芳香族ヒドロキシカルボン酸及びその誘導体の1種又は2種以上からなるポリエステル;
(2)主として(a)芳香族ヒドロキシカルボン酸及びその誘導体の1種又は2種以上と、(b)芳香族ジカルボン酸、脂環族ジカルボン酸及びその誘導体の1種又は2種以上と、(c)芳香族ジオール、脂環族ジオール、脂肪族ジオール及びその誘導体の少なくとも1種又は2種以上、とからなるポリエステル;
(3)主として(a)芳香族ヒドロキシカルボン酸及びその誘導体の1種又は2種以上と、(b)芳香族ヒドロキシアミン、芳香族ジアミン及びその誘導体の1種又は2種以上と、(c)芳香族ジカルボン酸、脂環族ジカルボン酸及びその誘導体の1種又は2種以上、とからなるポリエステルアミド;
(4)主として(a)芳香族ヒドロキシカルボン酸及びその誘導体の1種又は2種以上と、(b)芳香族ヒドロキシアミン、芳香族ジアミン及びその誘導体の1種又は2種以上と、(c)芳香族ジカルボン酸、脂環族ジカルボン酸及びその誘導体の1種又は2種以上と、(d)芳香族ジオール、脂環族ジオール、脂肪族ジオール及びその誘導体の少なくとも1種又は2種以上、とからなるポリエステルアミド等が挙げられる。さらに上記の構成成分に必要に応じ分子量調整剤を併用してもよい。
無機フィラーは、液晶性樹脂組成物の耐熱性等の物性を向上させるために及び密着力の良好な金属層を形成するために添加される。また、無機フィラーは、反射体12に耐熱性等の物性を付与することもできる。無機フィラーの種類は特に限定されないが、無機フィラーによっては、成形体表面の毛羽立ちを防止する効果のないものが存在する。表面が毛羽立つ成形体では、成形体表面に金属層を形成した時に、金属層と成形体表面との密着が不充分になる傾向にあるが、表面が毛羽立たない成形体では、成形体表面に金属層を形成した時に、金属層と成形体表面との密着力が強い。つまり、反射体の表面が毛羽立たなければ、金属層が表面に強く密着した反射体を得ることができる。そのためには、反射体の表面粗さRaと、反射体を製造するための金型の内壁面の表面粗さRaと、の差(ΔRa)が0.1mm以下になるように無機フィラーを選択する必要がある。上記表面粗さRaの差(ΔRa)が0.1mm以下になるように、液晶性樹脂の種類や無機フィラーのサイズに応じて適宜無機フィラーを選択する。具体的には、繊維状フィラー、粉粒状フィラー、板状フィラー等の一般的な無機フィラーの中から選択する。
液晶性樹脂は、本発明の効果を害さない範囲で他の熱可塑性樹脂とポリマーブレンドをしたものであってもよい。この場合に使用する熱可塑性樹脂は特に限定されないが、例を示すと、ポリエチレン、ポリプロピレン等のポリオレフィン、ポリエチレンテレフタレート、ポリブチレンテレフタレート等の芳香族ジカルボン酸とジオール或いはオキシカルボン酸等からなる芳香族ポリエステル、ポリアセタール(ホモ又はコポリマー)、ポリスチレン、ポリ塩化ビニル、ポリアミド、ポリカーボネート、ABS、ポリオキシフェニレンオキシド、ポリオキシフェニレンスルフィド、フッ素樹脂等を挙げることができる。また、これらの熱可塑性樹脂は2種以上混合して使用することができる。また、これらの樹脂には、機械的、電気的、化学的性質や難燃性等の諸性質を改善するため、必要に応じて種々の添加剤、強化剤、安定剤、酸化防止剤、顔料等を添加することが可能である。
本発明の発光装置の製造方法は、回路基板10と、回路基板10上に搭載された発光素子11と、発光素子11を囲むように回路基板10上に配置された反射体12と、を備える発光装置1の製造方法であり、反射体製造工程と、金属層形成工程と、発光素子搭載工程と、反射体配置工程と、を備える。以下、各工程について説明する。
液晶性樹脂:ベクトラE950iSX(ポリプラスチックス社製)
ガラス繊維:ECS03T-786H(日本電気硝子社製)、繊維径10.5μm(後述するガラス繊維の繊維長は押出条件(スクリュー回転数、シリンダー温度)で調整した。)
真球状シリカ1:アドマファインSO-C2(アドマテックス社製)、平均一次粒径0.5μm
真球状シリカ2:デンカ溶融シリカ FB-5S DC(電気化学工業社製)、平均一次粒径4.0μm
ガラスビーズ:EGB731(ポッターズ・バロティーニ株式会社製)平均一次粒径18μm
タルク:クラウンタルクPP(松村産業株式会社製)平均一次粒径11μm
ノイブルグシリシャスアース:シリコロイドP87(ホフマンミネラル社製)平均一次粒径1.5μm
液晶性樹脂100質量部に対して、表1、2に示す無機フィラーを、表1、2に示す添加量(質量部)で添加してなる液晶性樹脂組成物を調製した。
実施例及び比較例の製造に使用した液晶性樹脂組成物の流動性確認するためにこれらの樹脂組成物の溶融粘度を、これらの樹脂組成物ペレットを用いて、L=20mm、d=1mmのキャピラリー式レオメータ(東洋精機製キャピログラフ1B型)を使用し、温度350℃、せん断速度1000/sでISO 11443に準拠して、溶融粘度を測定した。測定結果を表1、2に示した。
実施例及び比較例の製造に使用した液晶性樹脂組成物を原料として、10mm×4mm×80mm射出成形片を得た。ISO75-1、2に準拠して、これらの射出成形試験片の荷重たわみ温度を測定した。測定結果を表1、2に示した。
表1、2に記載の樹脂組成物を成形し、それぞれの樹脂組成物を成形してなる図2に記載の反射体を製造した。製造した全ての反射体の表面の平滑性は、一様であることを確認した。
開口部が貫通する方向に半分に切断した反射体の中央部分について、超深度カラー3D形状測定顕微鏡VK-9500(キーエンス社製)を用いて、傾斜面の表面粗さRaを測定した。また、金型の表面粗さRaも成形体と同様の方法で測定した。実施例及び比較例の反射体の傾斜面の表面粗さを表1,2に示した。また、傾斜面に対応する金型内壁面の表面粗さは0.25mmであり、実施例及び比較例について表面粗さの差(ΔRa)も表1、2に示した。
スパッタリング装置(日立製作所製 E102)を用い、先ず、真空槽内を0.05Torrまで高真空化した。次いで、電流値が15mAになるように設定した。最後に、白金パラジウムターゲットを用い、ターゲットから30mmの位置になる様に基板にセットした反射体にスパッタリングを行い、白金パラジウム膜を形成させた。その結果、金属層が表面全体に形成された反射体が得られた。全ての実施例、比較例について、上記の方法で金属層が表面に形成された反射体を得た。なお、金属層の表面の平滑性は、一様であった。
試験片を製造するための金型は、上記の実施例と同様に、内壁面の表面粗さRaが0.25mmのものを用いた。
また、得られた射出成形試験片の表面の平滑性は、一様であった。そこで、射出成形試験片の表面の中央部について、上述の方法で表面粗さRaの測定を行った。測定結果は、全ての射出成形試験片において、同じ組成物を用いて得られた実施例及び比較例の反射体の表面粗さと同様の結果となった。
各射出成形試験片について、金属層が形成された射出成形試験片中央部の上面の金属層側の面に対して、V-570型紫外線分光光度計(日本分光株式会社製)を用いて、波長470nmの光で、反射率の測定を行った。測定結果を表1、2に示した。
実施例1~5の金属層形成前の反射体を1分間、室温の水中で超音波洗浄機にかけた。その後、超音波洗浄機にかける前後の反射体を比較して、反射体表面の毛羽立ちを目視により評価した。評価は以下の4段階評価で行い、評価結果を表3に示した。
◎;毛羽立ちが全くない。
○;表面のほとんどが毛羽立たないことが目視で確認された。
△;毛羽立ちが目視で確認された。
×;表面のほとんどが毛羽立つことが目視で確認された。
10 回路基板
11 発光素子
12 反射体
120 開口部
121 傾斜面
122 金属層
Claims (7)
- 回路基板と、回路基板上に搭載された発光素子と、発光素子を囲むように前記回路基板上に配置される反射体と、を備え、
前記反射体は、発光素子からの光を所望の方向に反射させるための傾斜面を有する発光装置の製造方法であって、
液晶性樹脂組成物から反射体を製造する反射体製造工程と、
前記反射体製造工程で得られる反射体の表面に対して金属層を形成する金属層形成工程と、
回路基板上に発光素子を搭載する発光素子搭載工程と、
前記回路基板上に反射体を配置する反射体配置工程と、を備え、
前記反射体製造工程は、前記反射体の表面粗さRaと、前記反射体を製造するための金型の内壁面の前記傾斜面に対応する位置の表面粗さRaと、の差(ΔRa)が0.1mm以下になるように反射体を製造する工程である発光装置の製造方法。 - 前記差(ΔRa)が、0.03mm以下である請求項1に記載の発光装置の製造方法。
- 回路基板と、
回路基板上に搭載された発光素子と、
発光素子を囲むように、前記回路基板上に配置された反射体と、を備え、
前記反射体は、液晶性樹脂と、平均一次粒径が15μm以下の無機フィラーと、を含み、
前記反射体の表面には金属層が配置される発光装置。 - 前記無機フィラーは、板状フィラー及び/又は粒粉状フィラーである請求項3に記載の発光装置。
- 前記無機フィラーは平均一次粒径が0.7μm以下のシリカである請求項3に記載の発光装置。
- 前記無機フィラーの含有量は、前記液晶性樹脂100質量部に対して、5質量部以上70質量部以下である請求項3から5のいずれかに記載の発光装置。
- 液晶性樹脂と、平均一次粒径が15μm以下の無機フィラーとを含み、表面に金属層を備える反射体。
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CN2011800375011A CN103069594A (zh) | 2010-07-30 | 2011-07-13 | 发光装置的制造方法、发光装置及反射体 |
KR1020127032322A KR20130005313A (ko) | 2010-07-30 | 2011-07-13 | 발광 장치의 제조 방법, 발광 장치 및 반사체 |
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Citations (5)
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JP2001024228A (ja) * | 1999-07-06 | 2001-01-26 | Nichia Chem Ind Ltd | 発光装置 |
JP2005159045A (ja) * | 2003-11-26 | 2005-06-16 | Sumitomo Electric Ind Ltd | 半導体発光素子搭載部材とそれを用いた発光ダイオード |
JP2008199000A (ja) * | 2007-01-18 | 2008-08-28 | Citizen Electronics Co Ltd | 半導体発光装置 |
JP2009164275A (ja) * | 2007-12-28 | 2009-07-23 | Asahi Rubber:Kk | シリコーン樹脂基材 |
JP2010132880A (ja) * | 2008-10-28 | 2010-06-17 | Sumitomo Chemical Co Ltd | 樹脂組成物、反射板及び発光装置 |
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JP2010106165A (ja) * | 2008-10-30 | 2010-05-13 | Polyplastics Co | 射出成形用液晶性樹脂組成物、当該樹脂組成物を成形してなる成形体、および当該成形体からなるカメラモジュール |
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2011
- 2011-07-13 WO PCT/JP2011/065988 patent/WO2012014679A1/ja active Application Filing
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2001024228A (ja) * | 1999-07-06 | 2001-01-26 | Nichia Chem Ind Ltd | 発光装置 |
JP2005159045A (ja) * | 2003-11-26 | 2005-06-16 | Sumitomo Electric Ind Ltd | 半導体発光素子搭載部材とそれを用いた発光ダイオード |
JP2008199000A (ja) * | 2007-01-18 | 2008-08-28 | Citizen Electronics Co Ltd | 半導体発光装置 |
JP2009164275A (ja) * | 2007-12-28 | 2009-07-23 | Asahi Rubber:Kk | シリコーン樹脂基材 |
JP2010132880A (ja) * | 2008-10-28 | 2010-06-17 | Sumitomo Chemical Co Ltd | 樹脂組成物、反射板及び発光装置 |
Cited By (1)
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EP2840305A4 (en) * | 2012-04-17 | 2015-12-30 | Alto Co Ltd | METHOD OF PREPARING A REFLECTOR |
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TW201205896A (en) | 2012-02-01 |
JP2012033726A (ja) | 2012-02-16 |
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