CN104518073A - Light-emitting device - Google Patents
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- CN104518073A CN104518073A CN201410474670.7A CN201410474670A CN104518073A CN 104518073 A CN104518073 A CN 104518073A CN 201410474670 A CN201410474670 A CN 201410474670A CN 104518073 A CN104518073 A CN 104518073A
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- 229920005989 resin Polymers 0.000 claims abstract description 39
- 239000011347 resin Substances 0.000 claims abstract description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000004062 sedimentation Methods 0.000 claims abstract description 23
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims 2
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims 1
- 238000004020 luminiscence type Methods 0.000 claims 1
- 229920005573 silicon-containing polymer Polymers 0.000 claims 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 30
- 239000000565 sealant Substances 0.000 abstract description 25
- 238000007789 sealing Methods 0.000 abstract description 9
- 150000003961 organosilicon compounds Chemical class 0.000 abstract description 3
- -1 polydimethylsiloxane group Polymers 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 7
- 239000003086 colorant Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000009429 electrical wiring Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/852—Encapsulations
- H10H20/854—Encapsulations characterised by their material, e.g. epoxy or silicone resins
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Abstract
本发明提供发光装置，其通过充分抑制密封剂的相对于温度变化的粘度变化，形成有良好的透光性树脂。本实施方式的发光装置(10)具有发光元件(12)和密封发光元件(12)的透光性树脂(14)。透光性树脂(14)中含有：通过发光元件(12)的发光而发出荧光的荧光体(16)和防止荧光体(16)的沉降的防沉降材料(18)。防沉降材料(18)是利用具有聚二甲基硅氧烷基的有机硅系化合物进行了表面处理的二氧化硅粒子，在将透光性树脂(14)设为了100重量部的情况下，二氧化硅粒子的含有量被设为0.5重量部以上且小于3重量部的范围。
The present invention provides a light-emitting device in which a good light-transmitting resin is formed by sufficiently suppressing a change in viscosity of a sealant with respect to a change in temperature. A light emitting device (10) of this embodiment includes a light emitting element (12) and a translucent resin (14) sealing the light emitting element (12). The translucent resin (14) contains: a phosphor (16) that emits fluorescence when the light emitting element (12) emits light; and an anti-sedimentation material (18) that prevents the phosphor (16) from settling. The anti-sedimentation material (18) is silica particles surface-treated with an organosilicon compound having a polydimethylsiloxane group, and when the translucent resin (14) is set to 100 parts by weight, The content of the silica particles is set within a range of not less than 0.5 parts by weight and less than 3 parts by weight.
Description
技术领域technical field
本发明涉及具有发光元件和透光性树脂的发光装置，该透光性树脂含有通过发光元件的发光而发出荧光的荧光体、和防止荧光体的沉降的防沉降材料。The present invention relates to a light-emitting device including a light-emitting element, a translucent resin containing a phosphor that emits fluorescence when the light-emitting element emits light, and an anti-sedimentation material that prevents the phosphor from settling.
背景技术Background technique
公知有利用含有荧光体的透光性密封树脂密封发光元件的发光装置。在这样的发光装置中，在用调配有荧光体的密封剂对发光元件进行密封时，通过加热使密封剂硬化而设为了透光性的密封树脂。There is known a light-emitting device in which a light-emitting element is sealed with a translucent sealing resin containing a phosphor. In such a light-emitting device, when the light-emitting element is sealed with the sealant containing the phosphor, the sealant is cured by heating to form a translucent sealing resin.
但是，在对密封剂进行加热时，密封剂的粘度降低，容易引起荧光体的沉降。如果荧光体沉降，则产生发光色的不均匀，特别产生在照明用途方面不理想的情况。However, when the sealant is heated, the viscosity of the sealant decreases, and sedimentation of the phosphor tends to occur. If the phosphor settles, unevenness in luminescent color occurs, which is not ideal in lighting applications in particular.
因此，为了抑制进行了加热时的密封剂的粘度降低而提出了使密封剂含有防沉降材料的技术(例如参照专利文献1)。Therefore, in order to suppress the viscosity drop of the sealing compound when heating, the technique which makes a sealing compound contain an anti-sedimentation material is proposed (for example, refer patent document 1).
在该专利文献1中，光半导体用的密封剂含有二氧化硅的粒子，作为防沉降材料。通过这样使密封剂含有二氧化硅的粒子，意图在于在不损害使密封剂固化而成的透光性树脂的透明性、耐热性、耐光性的情况下，将密封剂的粘度特性设为规定范围。In this patent document 1, the sealing compound for optical semiconductors contains the particle|grains of silica as an anti-sedimentation material. By making the sealant contain silica particles in this way, it is intended that the viscosity characteristics of the sealant be set to Specified range.
具体而言，通过考虑密封剂所包含的有机硅树脂的构造、二氧化硅粒子的比表面积和表面状态等，适当调整二氧化硅粒子的调配量，将粘度特性设为规定范围。Specifically, by considering the structure of the silicone resin contained in the sealant, the specific surface area and surface state of the silica particles, etc., the amount of the silica particles blended is appropriately adjusted to bring the viscosity characteristics within a predetermined range.
专利文献1：WO2008/153125Patent Document 1: WO2008/153125
但是，在专利文献1中，不能说密封剂变为了高温时的粘度降低防止是充分的。However, in Patent Document 1, it cannot be said that the prevention of viscosity decrease when the sealing agent becomes high temperature is not sufficient.
发明内容Contents of the invention
本发明是鉴于上述课题而完成的，其课题在于提供一种发光装置，其通过充分抑制密封剂的相对于温度变化的粘度变化，形成有良好的透光性树脂。The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a light-emitting device in which a good light-transmitting resin is formed by sufficiently suppressing a change in viscosity of a sealant with respect to a change in temperature.
本发明者对进一步抑制密封剂的相对于温度变化的粘度变化的技术进行了深刻研究。并且，着眼于当二氧化硅粒子的含有量增大时，密封剂的粘度增大的情况。图2是示出透光性树脂的温度与粘度之间的关系的曲线图，该透光性树脂将用作密封剂的热硬化性环氧树脂硬化而成。在将密封剂所含有的二氧化硅粒子的含有量设为了3重量部(图2的实线)的情况下，与将含有量设为了0重量部(图2的点划线)的情况相比，密封剂的粘度上升。The inventors of the present invention conducted intensive research on techniques for further suppressing changes in the viscosity of the sealant with respect to temperature changes. Furthermore, attention is paid to the fact that the viscosity of the sealant increases as the content of the silica particles increases. FIG. 2 is a graph showing the relationship between temperature and viscosity of a light-transmitting resin obtained by hardening a thermosetting epoxy resin used as a sealant. When the content of the silica particles contained in the sealant was set to 3 parts by weight (solid line in FIG. 2 ), the content was compared to the case where the content was set to 0 parts by weight (dashed line in FIG. 2 ). ratio, the viscosity of the sealant increases.
并且，本发明人进行了深刻研究的结果发现，在二氧化硅的粒子的含有量小于3重量部的情况下，能够充分抑制密封剂的相对于温度变化的粘度变化，进一步反复研究，完成了本发明。In addition, as a result of intensive studies by the present inventors, it has been found that when the content of silica particles is less than 3 parts by weight, the change in viscosity of the sealant with respect to temperature changes can be sufficiently suppressed, further studies have been repeated, and the result has been completed. this invention.
为了解决上述课题，本发明是一种发光装置，其具有发光元件和对所述发光元件进行密封的透光性树脂，所述透光性树脂中含有通过所述发光元件的发光而至少发出荧光的荧光体和防止所述荧光体的沉降的防沉降材料，所述发光装置的特征在于，所述防沉降材料是利用具有聚二甲基硅氧烷基的有机硅系化合物进行了表面处理的二氧化硅粒子，在将所述透光性树脂设为了100重量部的情况下，所述二氧化硅粒子的含有量在0.5重量部以上且小于3重量部的范围内。In order to solve the above-mentioned problems, the present invention is a light-emitting device including a light-emitting element and a light-transmitting resin that seals the light-emitting element, and the light-transmitting resin contains an element that emits at least fluorescence due to the light emitted by the light-emitting element. phosphor and an anti-sedimentation material that prevents the phosphor from settling, the light-emitting device is characterized in that the anti-sedimentation material is surface-treated with an organosilicon compound having a polydimethylsiloxane group As for the silica particles, the content of the silica particles is within a range of 0.5 parts by weight to less than 3 parts by weight, based on 100 parts by weight of the translucent resin.
根据本发明，提供一种发光装置，其通过充分抑制密封剂的相对于温度变化的粘度变化，形成有良好的透光性树脂。According to the present invention, there is provided a light-emitting device in which a good light-transmitting resin is formed by sufficiently suppressing a change in viscosity of a sealant with respect to a change in temperature.
附图说明Description of drawings
图1是示出本发明一个实施方式的发光装置结构的示意性侧面剖视图。FIG. 1 is a schematic side sectional view showing the structure of a light emitting device according to one embodiment of the present invention.
图2是示出透光性树脂的温度与粘度之间的关系的曲线图。FIG. 2 is a graph showing the relationship between temperature and viscosity of a translucent resin.
标号说明Label description
10：发光装置；12：发光元件；14：透光性树脂；16：荧光体；18：防沉降材料。10: light emitting device; 12: light emitting element; 14: translucent resin; 16: phosphor; 18: anti-sedimentation material.
具体实施方式Detailed ways
以下，参照附图说明本发明的实施方式。在以下的说明中，对与已说明的结构要素相同的结构要素标注相同标号，并适当省略其详细说明。Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same reference numerals are assigned to the same constituent elements as those already described, and detailed description thereof will be appropriately omitted.
图1是示出本发明一个实施方式(以下称作本实施方式)的发光装置结构的示意性侧面剖视图。FIG. 1 is a schematic side sectional view showing the structure of a light emitting device according to one embodiment of the present invention (hereinafter referred to as the present embodiment).
本实施方式的发光装置10具有发光元件12、和密封发光元件12的透光性树脂14。透光性树脂14中含有：通过发光元件12的发光而发出荧光的荧光体16、和防止荧光体16的沉降的防沉降材料18。在本实施方式中，将在热硬化性环氧树脂中含有荧光体16和防沉降材料18的树脂用作密封剂，并通过对其进行固化而设为了透光性树脂14。The light emitting device 10 of this embodiment includes a light emitting element 12 and a translucent resin 14 that seals the light emitting element 12 . The translucent resin 14 contains a phosphor 16 that emits fluorescence when the light emitting element 12 emits light, and an anti-sedimentation material 18 that prevents the phosphor 16 from sinking. In this embodiment, thermosetting epoxy resin containing fluorescent substance 16 and anti-sedimentation material 18 is used as a sealant, and this is cured to form translucent resin 14 .
此外，在本实施方式中，防沉降材料18是利用具有聚二甲基硅氧烷基的有机硅系化合物进行了表面处理的二氧化硅粒子。并且，将透光性树脂14设为了100重量部的情况下的防沉降材料18(二氧化硅的粒子)的含有量设为了0.5重量部以上且小于3重量部的范围。In addition, in the present embodiment, the anti-sedimentation material 18 is a silica particle surface-treated with an organosilicon compound having a polydimethylsiloxane group. Furthermore, the content of the anti-sedimentation material 18 (particles of silica) when the translucent resin 14 is 100 parts by weight is in the range of 0.5 parts by weight or more and less than 3 parts by weight.
当为3重量部以上时，密封剂的粘度相对于温度变化变得不稳定，并且当小于0.5重量部时，密封剂的粘度相比期望粘度变得过小。而且，对于该含有量，在荧光体的防沉降方面，2重量部以上且小于3重量部比较理想，在基于树脂的低粘度化的作业性改善方面，0.5重量部以上且小于2重量部比较理想。防沉降材料18的平均粒径(d50)为10nm～20nm比较理想。When it is 3 parts by weight or more, the viscosity of the sealant becomes unstable with respect to temperature changes, and when it is less than 0.5 parts by weight, the viscosity of the sealant becomes too small compared to the desired viscosity. Furthermore, regarding this content, in terms of anti-sedimentation of phosphors, it is more desirable to have 2 parts by weight or more and less than 3 parts by weight, and to improve workability by lowering the viscosity of the resin, it is better to be 0.5 parts by weight or more to less than 2 parts by weight. ideal. The average particle diameter (d50) of the anti-sedimentation material 18 is preferably 10 nm to 20 nm.
此外，荧光体的平均粒径(d50)处于10μm～20μm的范围内比较理想。是因为大于20μm时，防沉降材料18(二氧化硅的粒子)自身会沉降，并且当小于10μm时，密封剂的粘度达不到期望的粘度，无论哪种情况，荧光体的防沉降能力都会降低。In addition, the average particle diameter (d50) of the phosphor is preferably in the range of 10 μm to 20 μm. It is because when it is larger than 20 μm, the anti-sedimentation material 18 (particles of silicon dioxide) itself will settle, and when it is smaller than 10 μm, the viscosity of the sealant cannot reach the desired viscosity. reduce.
发光元件12出射例如波长320nm以上470nm以下的范围的光，但出射的光的波长没有特别限定。发光元件12可采用LED或激光二极管等半导体发光元件。The light emitting element 12 emits, for example, light having a wavelength in the range of 320 nm to 470 nm, but the wavelength of the emitted light is not particularly limited. The light emitting element 12 can be a semiconductor light emitting element such as LED or laser diode.
如图1所示，发光元件12配置于具有凹部20d的封装20的凹部底面。凹部20d被设为从底部到上部扩大的形状，在该凹部20d中填充有透光性树脂14。As shown in FIG. 1 , the light emitting element 12 is arranged on the bottom surface of the recess of the package 20 having the recess 20d. The concave portion 20d is formed in a shape that expands from the bottom to the top, and the light-transmitting resin 14 is filled in the concave portion 20d.
封装20被安装在基板24上。基板24上配置有省略了图示的电布线，在该电布线上电连接有发光元件12。例如在发光元件12为LED的情况下，通过在发光元件12的正电极与负电极之间施加电压，在发光元件12中流过驱动电流，从而发光元件12射出光。另外，通过将发光元件12配置到封装20的凹部20d的底面，输出光L的指向性提高。Package 20 is mounted on substrate 24 . Electrical wiring (not shown) is arranged on the substrate 24 , and the light emitting element 12 is electrically connected to the electrical wiring. For example, when the light emitting element 12 is an LED, a driving current flows through the light emitting element 12 by applying a voltage between the positive electrode and the negative electrode of the light emitting element 12, and the light emitting element 12 emits light. In addition, by arranging the light emitting element 12 on the bottom surface of the concave portion 20d of the package 20, the directivity of the output light L is improved.
在本实施方式的发光装置10中，荧光体16的含有量被设为了5重量部以上60重量部以下的范围。荧光体16由多个种类构成，含有发出红色作为荧光色的种类的荧光体。此外，在本实施方式中，透光性树脂14和防沉降材料18是无极性的。In the light-emitting device 10 of the present embodiment, the content of the phosphor 16 is set within a range of 5 parts by weight or more and 60 parts by weight or less. Phosphor 16 is composed of a plurality of types, including a type that emits red as a fluorescent color. In addition, in this embodiment, the translucent resin 14 and the anti-sedimentation material 18 are nonpolar.
如以上所说明那样，在本实施方式中，将透光性树脂14设为了100重量部的情况下的二氧化硅粒子的含有量在0.5重量部以上且小于3重量部的范围内。因此，充分抑制了密封剂相对于温度变化的粘度变化，因此发光装置10的透光性树脂14成为了使荧光体16在透光性树脂14的厚度方向上均匀分散而成的良好的透光性树脂14。As described above, in the present embodiment, the content of the silica particles when the translucent resin 14 is 100 parts by weight is in the range of 0.5 parts by weight or more and less than 3 parts by weight. Therefore, the change in viscosity of the sealing agent with respect to the temperature change is sufficiently suppressed, so that the light-transmitting resin 14 of the light-emitting device 10 becomes a good light-transmitting material obtained by uniformly dispersing the phosphor 16 in the thickness direction of the light-transmitting resin 14 . Resin14.
此外，荧光体16的含有量被设为了5重量部以上180重量部以下的范围。由此，在将密封剂固化而形成透光性树脂14时，能够防止荧光体16的沉降，同时充分抑制透光性树脂14的粘度相对于温度变化的不稳定性。In addition, the content of the phosphor 16 is set within a range of 5 parts by weight or more and 180 parts by weight or less. Thereby, when the sealing agent is cured to form the translucent resin 14 , the sedimentation of the phosphor 16 can be prevented, and the instability of the viscosity of the translucent resin 14 with respect to temperature changes can be sufficiently suppressed.
特别在制造照明用的LED作为发光装置10的情况下，大多通过将多个种类的荧光体加入到密封剂并使其硬化，设为透光性树脂14。这里，发出红色的荧光色的荧光体(以下称作红色用荧光体)与发出黄色等其它荧光色的荧光体(以下称作其它色用荧光体)相比，粒子直径较小，因此相比其它色用荧光体难以沉降。因此，即使组合红色用荧光体和其它色用荧光体并使它们含有在密封剂中，在本实施方式中，也能够消除由于红色用荧光体停留在密封剂的上层部且其它色用荧光体沉降而容易形成2层的荧光体层、这样的一直以来的不良情况，即使使多个种类的荧光体含有在密封剂中也能够使它们在透光性树脂14的厚度方向上良好地分散。In particular, when manufacturing LEDs for lighting as the light-emitting device 10 , many types of phosphors are added to the sealant and cured to form the light-transmitting resin 14 in many cases. Here, a phosphor emitting a red fluorescent color (hereinafter referred to as a red phosphor) has a smaller particle diameter than a phosphor emitting other fluorescent colors such as yellow (hereinafter referred to as a phosphor for other colors). Phosphors for other colors are difficult to settle. Therefore, even if the phosphor for red and the phosphor for other colors are combined and contained in the sealant, in the present embodiment, it is possible to eliminate the problem of the phosphor for red remaining on the upper layer of the sealant and the phosphor for other colors. Due to the conventional problem of easy formation of two phosphor layers due to sedimentation, even if a plurality of types of phosphors are contained in the sealant, they can be well dispersed in the thickness direction of the translucent resin 14 .
此外，在本实施方式中，透光性树脂14和防沉降材料18均是无极性的。因此，能够有效地避免以下情况：当透光性树脂14和防沉降材料18的一个是极性的且另一个是无极性的时，极性彼此和无极性彼此相互凝聚而难以被分散。另外，即使透光性树脂14和防沉降材料18均是极性的也能够得到相同的效果。In addition, in this embodiment, both the translucent resin 14 and the anti-sedimentation material 18 are nonpolar. Therefore, when one of the translucent resin 14 and the anti-sedimentation material 18 is polar and the other is nonpolar, it is possible to effectively avoid that the polarity and the nonpolarity mutually aggregate and are difficult to disperse. In addition, even if both the translucent resin 14 and the anti-sedimentation material 18 are polar, the same effect can be obtained.
以上说明了本发明的实施方式，但将本实施方式作为例子进行了提示，发明的范围不旨在限定于这些例子。本实施方式能够以其它各种方式实施，能够在不脱离发明主旨的范围内进行各种省略、置换和变更。本实施方式及其变形与被包含在发明的范围及主旨的范围内同样地，被包含在权利要求所记载的发明及其同等的范围内。As mentioned above, although embodiment of this invention was described, this embodiment was presented as an example, and the scope of the invention is not intended to be limited to these examples. The present embodiment can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. The present embodiment and its modifications are included in the invention described in the claims and its equivalent scope as well as being included in the scope and spirit of the invention.
如上所述，本发明的发光装置由于在将透光性树脂设为了100重量部的情况下，二氧化硅粒子的含有量在0.5重量部以上且小于3重量部的范围内，因此适于用作如下的发光装置，该发光装置通过充分抑制密封剂的相对于温度变化的粘度变化，形成有良好的透光性树脂。As described above, the light-emitting device of the present invention is suitable for use because the content of silica particles is within the range of 0.5 parts by weight to less than 3 parts by weight when the light-transmitting resin is set to 100 parts by weight. A light-emitting device in which a good light-transmitting resin is formed by sufficiently suppressing a change in viscosity of a sealant with respect to a change in temperature is provided.
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| CN108447959A (en) * | 2018-02-01 | 2018-08-24 | 广州硅能照明有限公司 | A phosphor coating method for improving LED performance |
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