JP2018177865A - Resin composition, method for producing resin composition and light emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin composition and a light emitting device with high light extraction efficiency.SOLUTION: A resin composition contains polyamide (A), and a reflector (C) treated with a zirconium coupling agent (B) represented by general formula 1: (R'-O)-Zr-[R''-R'''], where R' is an alkyl group, a is an integer of 1-3, R'' is an ester group or an ether group, R''' is an alkyl group represented by CHwith n of an integer of 1-30.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a resin composition, a method of producing a resin composition, and a light emitting device.

  Conventionally, a surface mounting type light emitting device including a package using a resin and a light emitting element provided in a recess of the package is widely used. In this light emitting device, the light emitting element is placed on the lead exposed on the bottom of the recess. In the light emitting device configured as described above, the light emission of the light emitting element is emitted from the opening of the recess, but for example, the light emitting element such as a light emitting diode emits much light not only upward but also laterally. Therefore, in order to increase the light extraction efficiency of the light emitting device, it is necessary to effectively extract the light emitted laterally from the light emitting element from the opening of the recess. Therefore, the light extraction efficiency is improved by inclining the side wall around the recess of the package so that the opening area is larger as it is closer to the opening and increasing the reflectance of the bottom and the side wall of the recess.

  In the resin package, as a method of increasing the reflectance of the bottom and the side wall of the recess which is the surface of the resin, there is a method of adding a reflective material to the resin and manufacturing the package by, for example, injection molding. The package formed by this method can increase the reflectance as the content of the reflective material increases, but when the filling amount of the reflective material in the resin increases, the flowability of the resin deteriorates and the package is formed It becomes difficult.

  Therefore, attempts have been made to prevent the deterioration of the flowability of the resin by incorporating in the resin a reflective material which has been surface-treated in advance. For example, Patent Document 1 discloses that a white pigment which is a reflector is subjected to a hydrophobization treatment with a coupling agent such as, for example, a silane coupling agent or a titanium coupling agent and then contained in a resin. Further, in Patent Document 2, titanium oxide, which is a reflective material, is surface-treated with a surface treatment agent such as a silane coupling agent, a titanium coupling agent, an organic acid, an organic compound, a polyol, or silicone, and then contained in a resin. Is disclosed.

JP 2012-124428 A JP, 2013-032539, A

  However, even if the members described in Patent Documents 1 and 2 are used, the flowability of the reflective material is insufficient, and it is difficult to highly fill the reflective material.

  Then, this embodiment aims at providing the resin composition with high light extraction efficiency, its manufacturing method, and a light-emitting device.

The resin composition of one embodiment according to the present invention comprises a polyamide (A) and a reflector (C) treated with a zirconium-based coupling agent (B) represented by the following general formula 1.
(R'-O) _4-a- Zr- [R ''-R '''] _a ... General formula 1
R ′ is an alkyl group, a is an integer of 1 to 3, R ′ ′ is an ester group or an ether group, and R ′ ′ ′ is a C _n H _{2n + 1} where _n is an integer of 1 to 30 Alkyl group.

A light emitting device according to an embodiment of the present invention includes: a package including a resin molded portion mainly composed of the resin composition according to the present invention; and a lead electrode embedded in the resin molded portion; And a light emitting element electrically connected to the electrode.
A light emitting device of an embodiment according to the present invention includes a light emitting element, and a resin molding portion which is disposed on a side surface of the light emitting element and which has a resin composition of an embodiment according to the present invention as a main component.

The method for producing a resin composition according to one embodiment of the present invention comprises a treatment step of treating a reflector (C) with a zirconium based coupling agent (B) represented by the following general formula 1;
(R'-O) _4-a- Zr- [R ''-R '''] _a ... General formula 1
R ′ is an alkyl group, a is an integer of 1 to 3, R ′ ′ is an ester group or an ether group, and R ′ ′ ′ is a C _n H _{2n + 1} where _n is an integer of 1 to 30 Alkyl group.
And a mixing step of mixing the polyamide (A) and the reflector (C) treated with the zirconium-based coupling agent (B).

  Thereby, the resin composition with high light extraction efficiency, its manufacturing method, and a light-emitting device can be provided.

FIG. 6 is a perspective view showing a configuration of a light emitting device of Embodiment 2.

Hereinafter, the resin composition of the embodiment concerning the present invention is explained.
The resin composition according to the embodiment can improve the flowability of the reflector and can be highly filled by subjecting the reflector to surface treatment. Further, by highly filling the package with the reflective material, it is possible to enhance the reflection efficiency, highly reflect the light from the light emitting element, and provide a light emitting device with high light extraction efficiency from the light emitting device.

  However, even if the flowability of the reflective material becomes high, the surface treatment agent for reducing the reflection efficiency of the reflective material is not preferable, so the predetermined zirconium-based coupling agent according to the embodiment is suitable.

  Hereinafter, each configuration of the embodiment according to the present invention will be described in detail.

Embodiment 1
The resin composition of Embodiment 1 is, for example, a resin composition suitable for producing a package of an optical semiconductor device such as a light emitting device,
It is a resin composition containing a reflector (C) treated with a polyamide (A) and a zirconium based coupling agent (B) represented by the following general formula 1.
(R'-O) _4-a- Zr- [R ''-R '''] _a ... General formula 1
R 'is an alkyl group,
a is an integer of 1 to 3,
R ′ ′ is an ester group or an ether group,
R ′ ′ ′ is an alkyl group represented by C _n H _{2n + 1 in} which _n is an integer of 1 to 30.

  Each component will be specifically described below.

Polyamide (A)
The polyamide used in Embodiment 1 is not particularly limited, but it is preferable to use a polyamide having a high melting point and high heat resistance, and as the polyamide having a high melting point and high heat resistance, a semi-aromatic polyamide, a semi fat And ring group polyamides. In particular, among semi-aromatic amides and semi-alicyclic polyamides, polyhexamethylene terephthalamide (PA6T), polynonamethylene terephthalamide (PA9T), polydecamethylene terephthalamide (PA10T), polyhexamethylene cyclohexanedicarboxamide Particularly desirable are (PA6C), polynonamethylenecyclohexanedicarboxamide (PA9C), polydecamethylenecyclohexanedicarboxamide (PA10C) and the like. In addition, as the above-mentioned polyamide, one kind of polyamide may be used alone, or two or more kinds of polyamide may be used in combination.

Zirconium based coupling agent (B)
The coupling agent used in Embodiment 1 is a zirconium-based coupling agent represented by General Formula 1.
(R'-O) _4-a- Zr- [R ''-R '''] _a ... General formula 1
Here, in the general formula 1, R ′ is an alkyl group. For example, a butyl group can be used as R ′, but R ′ may be an alkyl group having a carbon number smaller than that of a butyl group, or an alkyl group having a carbon number larger than that of a butyl group. Although a is an integer of 1 to 3, a is preferably 1 or 3.

  Also, R ′ ′ is an ester group or an ether group.

R ′ ′ ′ is an alkyl group represented by C _n H _{2n + 1 in} which _n is an integer of 1 to 30, and preferably an integer of 1 to 20. Specifically, methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, Hexadecyl group, heptadecyl group, octadecyl group, nonadecyl group, eicosyl group etc. are mentioned, and linear or saturated or unsaturated linear, saturated or unsaturated branched, saturated or unsaturated cyclic Can be used.

  As the coupling agent, the zirconium-based coupling agent of the present embodiment may be used alone, or the zirconium-based coupling agent of the present embodiment may be used as a main component in combination of two or more types of coupling agents. It is also good.

  The amount of the zirconium-based coupling agent to be used in the surface treatment of the reflective material is not particularly limited and may be appropriately set. For example, 0.1 part by weight of the reflective material (C) is, for example, 0.1 The amount is set in the range of 10 to 10 parts by weight, preferably 0.2 to 2.0 parts by weight, and more preferably 0.5 to 1.5 parts by weight.

  The method for treating the reflector with the above-mentioned coupling agent is not particularly limited, and a wet method, a dry method, an integral blend method or the like can be used. The wet method is a method in which a reflective material is previously charged into a solvent to prepare a slurry, and then a zirconium-based coupling agent is added for processing. The dry method is a method in which a reflective material is previously charged into a mixer or the like in the absence of a solvent, and a zirconium-based coupling agent is charged and processed. Integral blending is a method in which a zirconium-based coupling agent is introduced at the same time as the reflecting material is introduced into a resin.

Reflector (C)
Examples of the reflector (C) include metal oxides such as magnesium oxide, aluminum oxide, zinc oxide, titanium oxide, titanium oxide, zirconium oxide, niobium oxide and yttrium oxide, and metal compounds such as magnesium hydroxide. In addition, sulfides such as zinc sulfide and magnesium sulfide and nitrides such as boron nitride may be appropriately selected in consideration of the properties such as the respective refractive index and reflectance. Metal compounds are relatively chemically stable, are less susceptible to discoloration due to chemical reactions such as oxidation and sulfurization, and can achieve high reliability as a light-emitting device. Among metal compounds, metal oxides are preferable because they are relatively inexpensive.

  Among them, titanium oxide is preferable because it is chemically stable and has high light reflectivity to visible light. Further, as titanium oxide, any of anatase type, rutile type, monoclinic type and the like can be used, and two or more types with different crystal forms can be used in combination. The titanium oxide is preferably rutile type. It is because rutile type titanium oxide has a high refractive index, a good light stability, and a low activity as a photocatalyst as compared with the anatase type.

  As a reflector (C), it is preferable to contain 10 wt%-60 wt% of titanium oxide whole quantity of resin molding composition. More preferably, it is 30 wt% to 50 wt%, still more preferably 40 wt% to 45 wt%. Thus, the light emission output of the light emitting device can be maintained high. The shape of titanium oxide is also not particularly limited, and any of various shapes such as particulate, fibrous and plate shapes can be used, and two or more types of different shapes can be used in combination. Plates include flakes, scaly, mica and the like. The size of titanium oxide is not particularly limited, but may be 0.1 μm to 5 μm in average particle diameter, preferably 0.15 μm to 3 μm, and particularly preferably 0.2 μm to 1 μm. When titanium oxide is used, the photocatalytic effect is suppressed by surface treatment.

  The resin composition may further contain the following inorganic mineral in order to improve properties such as mechanical strength of the resulting resin molded article.

Inorganic mineral (D)
As inorganic mineral (D), glass fiber, potassium titanate fiber, wollastonite, zinc oxide fiber, sodium titanate fiber, aluminum borate fiber, magnesium borate fiber, magnesium oxide fiber, aluminum silicate fiber, silicon nitride fiber And inorganic fibers such as carbon fibers. Among them, it is desirable to use one or more kinds selected from potassium titanate fiber and wollastonite group in view of hiding power

  Although various potassium titanate fibers can be used as potassium titanate fibers, for example, potassium tetratitanate fibers, potassium hexatitanate fibers, potassium octatitanate fibers and the like can be used. The dimensions of the potassium titanate fiber are not particularly limited, but usually, the average fiber diameter is 0.01 μm to 1 μm, preferably 0.1 μm to 0.5 μm, and the average fiber length is 1 μm to 50 μm, preferably 3 μm to 30 μm. Wollastonite is an inorganic fiber composed of calcium metasilicate. The size of wollastonite is also not particularly limited, but usually, the average fiber diameter is 0.1 μm to 15 μm, preferably 2.0 μm to 7.0 μm, the average fiber length 3 μm to 100 μm, preferably 20 μm to 50 μm, the average aspect ratio 3 The above, preferably 3 to 50, more preferably 5 to 30.

  In order to further improve the mechanical strength and other properties of the resulting resin molded product, potassium titanate fibers and wollastonite may be subjected to surface treatment. The surface treatment may use a silane coupling agent, an aluminum-based coupling agent, a titanium-based coupling agent, a zirconium-based coupling agent, or the like according to a known method. The blending amount of potassium titanate fiber and / or wollastonite is usually 5% by weight to 70% by weight, preferably 10% by weight to 70% by weight of the total amount of the resin molded body composition (30 to 90% by weight of resin component) It is good to do.

  The resin composition may contain the following additives in order to prevent the color change of the obtained resin molded product and to prevent the decrease in light reflectance.

Additive (E)
The resin composition is used, for example, as a hindered phenol compound, a hindered amine compound, a phosphorus compound, and sulfur in order to prevent discoloration and to prevent a decrease in light reflectance when used as a package for an optical semiconductor device. Based compounds can be contained. In addition, one or two or more of various additives conventionally used for synthetic resins can be added to the resin composition as long as the desirable physical properties are not impaired. Additives include, for example, inorganic fillers such as talc, silica, zinc oxide (including tetrapod-shaped ones), flame retardants, plasticizers, nucleating agents, dyes, pigments, mold release agents, UV absorbers, etc. It can be mentioned.

The process for producing the resin composition comprises the step of treating the reflector (C) with the zirconium based coupling agent (B) given by the general formula 1;
And a mixing step of mixing the polyamide (A) and the reflector (C) treated with the zirconium based coupling agent (B).
Here, in the treatment step of treating the reflector (C), it is preferable to treat 100 parts by weight of the reflector (C) with 0.1 part by weight to 10 parts by weight of the zirconium coupling agent (B), It is more preferable to treat 100 parts by weight of the reflector (C) with 0.5 parts by weight to 1.5 parts by weight of the zirconium-based coupling agent (B).

  Since the resin composition of Embodiment 1 comprised as mentioned above contains the reflector (C) surface-treated by the zirconium type coupling agent (B), it can improve fluidity | liquidity. As a result, it is possible to easily form a thin-walled package. Even with a thin-walled package, the light reflectance can be maintained high, and the light extraction efficiency from the package can be increased. Furthermore, it is possible to suppress the decrease in the reflectance of the side wall due to the color change due to the heat received at the time of manufacturing the light emitting device.

Embodiment 2
The light emitting device of Embodiment 2 according to the present invention is a light emitting device provided with a package molded using the resin composition of Embodiment 1. FIG. 1 is a perspective view showing the configuration of the light emitting device of the second embodiment.

  The light emitting device 100 of the second embodiment has a light emitting element 10, a recess 60 having a bottom surface 20a and a side wall 20b, and covers the light emitting element 10 with the package 20 molded using the resin composition of the first embodiment. And a sealing member 40. The package 20 is integrally molded with the lead electrode 30 using a resin composition.

In the light emitting device 100, the light emitting element 10 is mounted on the lead electrode 30 exposed on the bottom surface 20 a of the recess 60 of the package 20. The electrode of the light emitting element 10 and the lead electrode 30 exposed to the bottom surface 20 a are electrically connected by a conductive wire or the like. Furthermore, in order to change the color of light emitted from the light emitting device 100, the sealing member 40 can also contain a fluorescent material 50. As described in the first embodiment, the package 20 is configured to include polyamide, a reflector, an inorganic fiber, and the like. The material of the sealing resin 40 is silicone.
Hereinafter, each component of Embodiment 2 will be described.

Light-Emitting Element The light-emitting element includes, for example, a semiconductor multilayer structure including a light-emitting layer on a substrate. The semiconductor multilayer structure can be formed, for example, by growing a semiconductor such as GaAlN, InGaN, GaN, AlInGaN, ZnS, ZnSe, SiC, GaP, GaAlAs, AlN, InN, AlInGaP or the like. Among these semiconductors, by using nitride-based compound semiconductors such as GaAlN, InGaN, GaN and AlInGaN, light intensity having a light emission peak wavelength in the near ultraviolet region or short wavelength region (360 nm to 550 nm) of visible light is high. A light emitting element can be manufactured. Note that a light emitting element having a light emission peak wavelength in a long wavelength range (551 nm to 780 nm) of visible light can also be used.

  The light emitting device may include a plurality of light emitting elements. A combination of a plurality of light emitting elements can provide a light emitting device capable of emitting white light with high color rendering. The combination of light emitting elements for emitting white light may be, for example, two light emitting elements capable of emitting a green light, and one light emitting element capable of emitting a blue light and a red color.

  For example, in the case of configuring a light emitting device for full color display, for example, a red light emitting element having an emission peak wavelength of 610 nm to 700 nm, a green light emitting element having an emission peak wavelength of 495 nm to 565 nm, an emission peak wavelength Is used in combination with a blue light emitting element having a wavelength of 430 nm to 490 nm. In the light emitting device, when white light is emitted by mixing the light of the light emitting element and the light of the fluorescent substance, the setting of the peak wavelength of the light emitting element and the fluorescent substance in consideration of the complementary color relationship in the light emitting wavelength of the light emitting element and the fluorescent substance Make a selection of In this case, in consideration of deterioration of the sealing member due to light output of the light emitting element, the emission peak wavelength of the light emitting element is preferably 400 nm or more and 530 nm or less, and more preferably 420 nm or more and 490 nm or less. The emission peak wavelength of the light emitting element is more preferably 450 nm or more and 475 nm or less in order to further improve the excitation efficiency and the light emission efficiency of the light emitting element and the fluorescent material.

Package 20
The package 20 has a recess 60 defined by the bottom surface 20a and the side surface 20b. By surface-treating the reflective material contained in the package 20 with a predetermined zirconium-based coupling agent, it is possible to highly fill the reflective material while suppressing the viscosity of the package resin to a low level without causing color change due to heat at the time of manufacturing the light emitting device. As a result, it is possible to form a package having a thin side wall 20b of, for example, 200 μm or less, and further 100 μm or less, using the resin composition highly filled with a reflective material. Even with such thin side walls, the light reflectance on the side walls can be increased, so that light leakage from the side walls can be reduced, and a light emitting device with high light extraction efficiency can be provided. Moreover, the package 20 is a form which has a longitudinal direction and a transversal direction, observing from the opening side of the recessed part 60. FIG. At this time, if the thickness of the side wall 20b formed along the longitudinal direction among the side walls 20b of the recess 60 is reduced, the outer dimension of the package in the width direction can be reduced without changing the dimension of the recess 60. Therefore, the same light emitting element 10 can be used to provide a thin light emitting device 100. Thus, the thin light emitting device 100 is suitable for use as a side view.

Sealing member 40
Although the material of the sealing member 40 is not particularly limited, for example, a translucent resin such as a silicone resin or an epoxy resin can be used. It is also possible to use an inorganic material such as glass.

Fluorescent substance 50
The fluorescent material 50 absorbs the light from the light emitting element 10 and emits light of different wavelengths. Specifically, for example, aluminum garnet-based phosphors, nitride-based phosphors / oxynitride-based phosphors / sialon-based phosphors mainly activated with lanthanoid-based elements such as Eu and Ce, and lanthanoid-based substances such as Eu , Mn, etc., alkaline earth halogen apatite phosphors, alkaline earth metal borate halogen phosphors, alkaline earth metal aluminate phosphors, alkaline earth silicates mainly activated by transition metal elements such as Mn, etc. Alkaline earth sulfide, alkaline earth thiogallate, alkaline earth silicon nitride, germanate, or a rare earth aluminate, rare earth silicate or Eu, which is mainly activated by a lanthanoid element such as Ce It is at least one or more selected from organic and organic complexes mainly activated by lanthanoid elements.

  The light emitting device of Embodiment 2 configured as described above includes the package including a large amount of the reflector (C) surface-treated with the zirconium-based coupling agent (B), so that the light extraction efficiency is improved. There is.

Examples according to the present invention will be described below. However, the present invention is not limited to the following examples.
(Examples 1 to 3, Comparative Examples 1 and 2)
As shown in Table 1, the resin compositions of Examples 1 to 3 and Comparative Examples 1 and 2 are produced.

The resin compositions of Examples 1 to 3 are surface-treated with a zirconium-based coupling agent to titanium oxide contained in the resin composition, while the resin compositions of Comparative Examples 1 and 2 are resins. The titanium oxide contained in the composition is not surface-treated. Comparative Example 2 is the same as Examples 1 to 3 except that titanium oxide is not surface-treated. The comparative example 1 is the same as the comparative example 2 except that the weight ratio of the reflective material (C) is smaller than those of the examples 1 to 3 and the comparative example 1.
Examples 1 and 2 are monobutoxy zirconium (IV) tri-i-stearate (B1) (for example, trade name: manufactured by Nippon Soda Co., Ltd .: ZR-152) with respect to the type of zirconium coupling agent (B). Use). Examples 1 and 2 differ in the processing amount (parts by weight) of B1.
The structural formula of B1 is (C ₄ H ₉ -O) -Zr- (O-CO-C ₁₇ H ₃₅ ) ₃ .
Example 3 uses zirconium stearate (B2) (for example, trade name: ZC-320 manufactured by Matsumoto Fine Chemical Co., Ltd.) for the type of zirconium-based coupling agent (B). The processing amount (parts by weight) of B2 of Example 3 is the same as the processing amount of B1 of Example 2.
The structural formula of B2 is (C ₄ H ₉ -O) ₃ -Zr- (O-CO-C ₁₇ H ₃₅ ).

Moreover, in Examples 1-3 and Comparative Examples 1 and 2, the followings are used except for the surface treatment agent.
Polyamide (A): poly nonamethylene terephthalamide _{(- [- CO-C 6} H 4 -CONH- (C 9 H 18) -NH -] -)
Reflector (C): Titanium oxide (Brand name of Ishihara Sangyo Co., Ltd .: CR-90)
Fibrous mineral (D): Wollastonite (trade name: SH-1800 manufactured by Kinsei Martec Co., Ltd.)
Additive (E): Hindered Phenolic Compound (Brand name made by BASF: Irganox 1098 (registered trademark))
Additive (E): phosphorus-based compound (trade name of Daido Seiyaku Co., Ltd .: calcium diphosphite)
Additive (E): hindered amine compound (trade name of Clariant Japan Ltd .: Nylostab S-EED (registered trademark))

The manufacturing method of the resin composition of Examples 1-3 is as follows.
First, a predetermined amount of titanium oxide is weighed, and twice the theoretical water amount necessary for the hydrolysis of the surface treatment agent is added with NH ₃ water and mixed. A predetermined amount of a zirconium-based coupling agent is weighed at a weight ratio of titanium oxide, diluted with the same amount of 1-butanol, and then added to titanium oxide to perform mixing. After the completion of mixing, it is dried in a dryer to obtain titanium oxide which has been subjected to surface treatment.

The reflector (C), the polyamide (A), the inorganic fiber (D), and the additive (E) of Examples 1 to 3 treated by the above-described method are weighed and dry-blended so as to have a predetermined ratio. After dry mixing, a resin composition is produced by melt kneading at 320 ° C. using a twin-screw extrusion kneader.
Also in Comparative Examples 1 and 2, a resin composition is produced by the same production process except that the surface treatment of titanium oxide is not performed.

(Evaluation of resin flowability)
The fluidity of the resin is evaluated for the resin compositions of Examples 1 to 3 and Comparative Examples 1 and 2. The fluidity evaluation of the resin is carried out by MFR (melt flow rate).
As a measuring method, it carries out based on JISK 7210, and carries out measurement conditions at 320 ° C. and a load of 0.65 gf. The value shown as the evaluation result is a relative value when MFR (g / 10 min) of the resin composition of Comparative Example 1 containing 35 parts by weight of titanium oxide not subjected to surface treatment is 100.

In the evaluation results, the flowability is significantly deteriorated in Comparative Example 2 in which 43 parts by weight of the reflective material (C) is used as compared with Comparative Example 1 in which 35 parts by weight of the reflective material (C) is used.
On the other hand, in Examples 1 to 3 in which 43 parts by weight of the reflective material (C) was used but the surface treatment was performed, the flowability of the resin was significantly improved. The flowability is further improved in Example 2 in which the zirconium-based coupling agent (B) is used more than in Example 1. In addition, the flowability is improved by using B1 of Example 2 as compared with the case of using B2 of Example 3.

  The resin compositions of Examples 1 to 3 have high flowability with respect to the resin composition of Comparative Example 1, and thus molding of the package is easy, but the flowability of Comparative Example 2 is inferior to that of Comparative Example 1 Therefore, molding of the package is difficult. Therefore, it is difficult to mold a package using the resin composition of Comparative Example 2 and to mold a package with high light extraction efficiency.

(Examples 4 to 6)
The light emitting devices of Examples 4 to 6 are manufactured.
As a light emitting device of Examples 4 to 6, the resin composition of Examples 1 to 3 is injection-molded to produce a package, and the light emitting device is produced using the package. The light emitting device of Example 4 uses the resin composition of Example 1 for a package, the light emitting device of Example 5 uses the resin composition of Example 2 for a package, and the light emitting device of Example 6 is Example 3 Resin composition is used for the package. The light emitting devices of Examples 4 to 6 are as described in Embodiment 2. The package 20 in the light emitting device of Examples 4 to 6 has a recess 60 having a bottom surface 20a and a side wall 20b, and is molded using the resin composition of Examples 1 to 3. The package 20 takes the form of NSSW 304D (manufactured by Nichia Chemical Industries, Ltd.). The package 20 and the lead electrode 30 are integrally formed, and the lead electrode 30 is made of copper as a base material and silver is plated on the surface. In the light emitting devices of Examples 4 to 6, a light emitting element 10 having a nitride semiconductor layer having a light emission peak wavelength at about 450 nm and a sealing member 40 which is a phenyl silicone resin (type OE6630: manufactured by Toray Dow Corning Co., Ltd.) And use.

The light emitting device of Comparative Example 3 is manufactured by the same method as the light emitting device of Examples 4 to 6 except that the resin composition of Comparative Example 1 is used.
Table 2 shows the results of measuring the luminous fluxes of the light emitting devices of Examples 4 to 6.

The total luminous flux evaluation of the light emitting devices of Examples 4 to 6 is performed by an integral type total luminous flux measuring machine, and the total luminous flux ratio when the total luminous flux of the light emitting device of Comparative Example 3 is 100 is shown.
From this result, in the light emitting devices of Examples 4 to 6, the total luminous flux is larger than that of the light emitting device of Comparative Example 3.

  The light emitting device according to the embodiment can be used as a backlight of liquid crystal, full color display, illumination in a switch, a light source for illumination, various indicators, traffic lights, etc. It is used for the light-emitting device which combined the.

DESCRIPTION OF SYMBOLS 10 light emitting element 20 package 20a bottom 20b side wall 30 lead electrode 40 sealing member 50 fluorescent substance 60 recessed part 100 light emitting device

Claims (12)

A resin composition comprising a polyamide (A) and a reflector (C) treated with a zirconium based coupling agent (B) represented by the following general formula 1.
(R'-O) _4-a- Zr- [R ''-R '''] _a ... General formula 1
R 'is an alkyl group,
a is an integer of 1 to 3,
R ′ ′ is an ester group or an ether group,
R ′ ′ ′ is an alkyl group represented by C _n H _{2n + 1 in} which _n is an integer of 1 to 30.   The resin composition according to claim 1, wherein the reflector (C) contains at least one of a metal compound, a metal oxide, a nitride, and a sulfide.   The reflector (C) is selected from the group consisting of magnesium oxide, aluminum oxide, zinc oxide, titanium oxide, zirconium oxide, niobium oxide, barium titanate, magnesium hydroxide and yttrium oxide, boron nitride, zinc sulfide and magnesium sulfide The resin composition according to claim 1, comprising at least one selected from the group consisting of   The resin composition according to any one of claims 1 to 3, wherein a is 1 or 3.   The resin composition according to any one of claims 1 to 4, wherein n is an integer of 1 to 20.   The resin composition according to any one of claims 1 to 5, wherein the resin composition further contains a fibrous mineral (D).   Fibrous mineral (D) is glass fiber, potassium titanate fiber, wollastonite, zinc oxide fiber, sodium titanate fiber, aluminum borate fiber, magnesium borate fiber, magnesium oxide fiber, aluminum silicate fiber, silicon nitride fiber The resin composition according to claim 6, comprising one selected from the group consisting of and carbon fibers.   An electrical connection between the lead electrode and a package including a resin molded part mainly composed of the resin composition according to any one of claims 1 to 7 and a lead electrode embedded in the resin molded part And a light emitting element.   The light emitting device according to claim 8, wherein the package has a recess for receiving the light emitting element, and a minimum thickness of a side wall of the resin molded portion surrounding the recess is 200 μm or less. A light emitting element,
The resin molded part which has the resin composition as described in any one of Claims 1-7 arrange | positioned at the side surface of the said light emitting element, and a light emitting device provided. Treating the reflector (C) with a zirconium based coupling agent (B) represented by the following general formula 1;
(R'-O) _4-a- Zr- [R ''-R '''] _a ... General formula 1
R 'is an alkyl group,
a is an integer of 1 to 3,
R ′ ′ is an ester group or an ether group,
R ′ ′ ′ is an alkyl group represented by C _n H _{2n + 1} , n is an integer of 1 to 30,
The manufacturing method of the resin composition containing the mixing process of mixing polyamide (A) and the reflecting material (C) processed by the said zirconium type coupling agent (B).   The method for producing a resin composition according to claim 11, wherein 100 parts by weight of the reflective material (C) is treated with 0.1 to 10 parts by weight of the zirconium-based coupling agent (B) in the treatment step.

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