CN103824906A - 一种led封装方法及led装置 - Google Patents

一种led封装方法及led装置 Download PDF

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CN103824906A
CN103824906A CN201410076151.5A CN201410076151A CN103824906A CN 103824906 A CN103824906 A CN 103824906A CN 201410076151 A CN201410076151 A CN 201410076151A CN 103824906 A CN103824906 A CN 103824906A
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led
substrate
chip
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solder
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唐小玲
罗路遥
陈小宇
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Shandong jierunhong Photoelectric Technology Co., Ltd
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SHENZHEN ZHIXUNDA PHOTOELECTRIC TECHNOLOGY Co Ltd
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Abstract

本发明公开了一种LED封装方法及LED装置,所述LED封装方法包括:把基板或支架上需要与LED芯片电极粘接的导电端通过图像处理自动定位,并在要与LED芯片电极粘接的导电端点上焊锡膏;把LED芯片的正负电极对准相应的基板或支架上的焊锡膏,并把LED芯片放置于基板或支架上;再把放有LED芯片的基板或支架置于回流焊炉里使焊锡膏固化;把已调配好的胶与荧光粉点在已完成固定的芯片上,把点有胶和荧光粉的基板或支架置于烤箱里烘烤。采用本发明使芯片的固定更牢靠,提高了封装效率,并提高了导热性能,有利于芯片在工作时产生的热量被传导出去,从而提高了光源的效率与寿命,并且节约了设备和人工成本。

Description

一种LED封装方法及LED装置
技术领域
本发明涉及LED技术领域,尤其涉及的是一种免除焊线的LED封装方法及LED装置。
背景技术
LED光源与现有的照明用光源相比是小型、高效率、长寿命及环保节能的光源。随着全球都对环保与节能的日益重视,环保与节能的市场需求在不断增加,使用LED光源的照明器具的需求也在不断增加。 
如图1所示,现有LED光源的的封装是先把LED芯片10用胶20固定在基板30(或支架)上,且芯片10的正、负电极11面朝上;然后用超声焊接法把导线40的一端焊在芯片的电极11上,导线40的另一端焊在基板30(或支架)上的导电引脚上,从而实现芯片与基板(或支架)之间的电性连接;每个芯片10的正负电极11至少要各焊一条导线。这种封装方式存在以下缺点。
1、  需要先用粘接胶来固定芯片,因为胶的导热性不好,使芯片工作时产生的热量无法快速及时地传导出去,造成LED光源的性能与寿命下降,影响LED光源的普及应用。
2、  用粘接胶固定芯片,粘接胶的粘着力耐候性不是很好,且胶会随瓶着时间产生龟裂老化,易造成芯片脱落使光源不亮。
3、  导线很细,所能通过的电流受到限制,影响LED光源的性能。
4、需要焊线设备焊接导线来实现电性连通,增加了工艺的复杂性和设备成本,且所用导线是金线,增加了光源的材料成本。
因此,现有技术还有待于改进和发展。
发明内容
本发明要解决的技术问题在于,针对现有技术的上述缺陷,提供一种免除焊线的LED封装方法及LED装置,芯片的固定更牢靠,提高了封装效率,并提高了导热性能,有利于芯片在工作时产生的热量被传导出去,从而提高了光源的效率与寿命,并且节约了设备投入和人工成本。
本发明解决技术问题所采用的技术方案如下:
一种LED封装方法,其中,包括:
A、将用来制作LED光源的基板或支架固定;
B、把基板或支架上需要与LED芯片电极粘接的导电端通过图像处理自动定位,并在要与LED芯片电极粘接的导电端点上焊锡膏;
C、把LED芯片的正负电极对准相应的基板或支架上的焊锡膏,并把LED芯片放置于基板或支架上;
D、再把放有LED芯片的基板或支架置于回流焊炉里使焊锡膏固化,以实现LED芯片与基板或支架间的牢靠固定及电性能的连通;
E、把已调配好的胶与荧光粉点在已完成固定的芯片上,把点有胶和荧光粉的基板或支架置于烤箱里烘烤。
所述的LED封装方法,其中,所述步骤B还包括:点焊锡膏的量根据芯片大小做调整。
所述的LED封装方法,其中,所述步骤C还包括:LED芯片在基板或支架上的放置位置误差<0.1mm,且歪斜误差<10℃。
所述的LED封装方法,其中,所述步骤D还包括:回流焊各温区的温度设定为80℃~330℃,并且设定回流焊的传送速度为一个温区运行约20秒~65秒。
所述的LED封装方法,其中,所述步骤E还包括:把点有胶和荧光粉的基板或支架置于120℃~150℃的烤箱里烧烤30分钟。
所述的LED封装方法,其中,所述焊锡膏是采用金属合金材料制成的锡银铜合金膏,金锡合金膏,铅锡合金膏等焊锡膏。
一种LED装置,其中,包括用于安装LED芯片的基板或支架,还包括设置在所述基板或支架上的用于与LED芯片的正负电极分别接触连接的焊锡膏,以及设置在所述焊锡膏上面倒装的LED芯片;所述LED芯片通过其正负电板连接设置在所述焊锡膏上;并且所述LED装置采用权利要求1-5任一项所述LED封装方法封装而成。
所述的LED装置,其中,所述焊锡膏是采用金属合金材料制成的锡银铜合金膏,金锡合金膏,铅锡合金膏等焊锡膏。
本发明所提供的免除焊线的LED封装方法及LED装置,由于采用了所述LED封装方法包括:把基板或支架上需要与LED芯片电极粘接的导电端通过图像处理自动定位,并在要与LED芯片电极粘接的导电端点上焊锡膏;把LED芯片的正负电极对准相应的基板或支架上的焊锡膏,并把LED芯片放置于基板或支架上;再把放有LED芯片的基板或支架置于回流焊炉里使焊锡膏固化;把已调配好的胶与荧光粉点在已完成固定的芯片上,把点有胶和荧光粉的基板或支架置于烤箱里烘烤,本发明具有如下优点:
1).本发明用焊锡膏代替粘接胶来固定芯片,使芯片的固定更牢靠,不会脱落;提高了导热性能,有利于芯片在工作时产生的热量被传导出去,从而提高了光源的效率与寿命。
2).本发明用焊锡膏代替金导线来实现芯片正负电极与基板(或支架)导电端的电性连通,节省了金导线,增大了导电面积,从而提高了光源的效率并节省了资源。
3).本发明把固定芯片和焊接导线两道工序缩减为一道工序,简化了工艺流程,节约了设备和人工成本。
4).本发明不仅可应用在金属基板的LED光源的封装上,同时也可应用在玻璃基板、陶瓷基板等非金属基板的LED光源的封装。
附图说明
图1是现有技术的LED装置结构示意图。
图2是本发明实施例的LED装置结构示意图。
图3是本发明一种免除焊线的LED封装方法及LED装置的较佳实施例的流程图。
具体实施方式
为使本发明的目的、技术方案及优点更加清楚、明确,以下参照附图并举实施例对本发明进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
本发明实施例提供的一种LED装置,如图2所示,包括用于安装LED芯片100的基板300(当然也可以为用于安装LED芯片支架),还包括设置在所述基板300的用于与LED芯片100的正负电极111分别接触连接的焊锡膏200,以及设置在所述焊锡膏200上面倒装的LED芯片100;所述LED芯片100通过其正负电板111连接设置在所述焊锡膏200上;其中,所述焊锡膏是采用金属合金材料制成的锡银铜合金膏,金锡合金膏,铅锡合金膏等焊锡膏。
本发明实施例的LED装置,用焊锡膏200代替了固定胶和导线,焊锡膏是金属合金材料制成,使LED芯片与基板(或支架)的粘接牢固,保证了芯片不会脱落;焊锡膏的导热性好,使芯片工作时产生的热量可快速传导出去,保证了LED光源的性能与寿命;增加了芯片与基板(或支架)的粘接面积,可通过更大的工作电流,即同样的光源可发出更多的光,提高了资源利用效率;省去了焊接导线的作业,简化了LED光源的工艺流程,节约了资源,降低了成本。
本发明还提供了一种如上述实施例所述LED装置的LED封装方法,请参见图3,图3是本发明一种免除焊线的LED封装方法及LED装置的较佳实施例的流程图。所图3所示,所述LED封装方法,包括以下步骤。
步骤S101、将用来制作LED光源的基板或支架固定。
步骤S102、把基板300需要与LED芯片100电极111粘接的导电端通过图像处理自动定位,参考图2,并在要与LED芯片100电极11粘接的导电端点上焊锡膏200。
其中所述焊锡膏是采用金属合金材料制成的焊锡膏,而点焊锡膏的量根据芯片大小做调整。
本步骤中,即再把基板(或支架)上二个要与芯片电极粘接的导电端通过图像处理自动定位再在基板(或支架)上二个要与芯片电极粘接的导电端点上适量焊锡膏,其焊锡膏的位置要准确,焊锡膏的量根据芯片大小做调整,焊锡膏的量要控制精确,量少会使芯片固定不牢固,量多则会造成电路短路。
并进入步骤S103。
步骤S103、把LED芯片100的正负电极对准相应的基板300的焊锡膏,并把LED芯片100放置于基板300;其中:LED芯片100在基板300的放置位置误差<0.1mm,且歪斜误差<10℃。
本步骤中,即把芯片的正负电极对准相应的基板(或支架)上的焊锡膏,并把芯片放置于基板(或支架)上,芯片放置的位置要精确(误差<0.1mm),且不能歪斜(误差<10℃)位置偏斜会造成芯片固定不牢固、电路短路及电路开路。
步骤S104、再把放有LED芯片100的基板或支架置于回流焊炉里使焊锡膏固化,以实现LED芯片100与基板或支架间的牢靠固定及电性能的连通;
其中,回流焊各温区的温度设定为80℃~330℃,并且设定回流焊的传送速度为一个温区运行约20秒~65秒。
本步骤中,即把放有芯片的基板(或支架)置于回流焊炉里使焊锡膏固化,回流焊各温区的温度(80℃~330℃)设定与回流焊的传送速度(一个温区运行约20秒~65秒)设定要根据所加工的芯片不同及基板(或支架)不同而不同。这就实现了芯片与基板间的牢靠固定及电性能的连通。
步骤S105、把已调配好的胶与荧光粉点在已完成固定的芯片上,把点有胶和荧光粉的基板或支架置于烤箱里烘烤。较佳地把点有胶和荧光粉的基板或支架置于120℃~150℃的烤箱里烧烤30分钟。
本实施方法中,当把已调配好的胶与荧光粉点在已完成固定的芯片上后,再把点有胶和荧光粉的基板(或支架)置于烤箱里烘烤(一般是120℃~150℃烧烤30分钟),烘烤温度与时间根据不同的胶和荧光粉而略有不同。
综上所述,本发明所提供的免除焊线的LED封装方法及LED装置,由于采用了所述LED封装方法包括:把基板或支架上需要与LED芯片电极粘接的导电端通过图像处理自动定位,并在要与LED芯片电极粘接的导电端点上焊锡膏;把LED芯片的正负电极对准相应的基板或支架上的焊锡膏,并把LED芯片放置于基板或支架上;再把放有LED芯片的基板或支架置于回流焊炉里使焊锡膏固化;把已调配好的胶与荧光粉点在已完成固定的芯片上,把点有胶和荧光粉的基板或支架置于烤箱里烘烤,本发明具有如下优点:
1).本发明用焊锡膏代替粘接胶来固定芯片,使芯片的固定更牢靠,不会脱落;提高了导热性能,有利于芯片在工作时产生的热量被传导出去,从而提高了光源的效率与寿命。
2).本发明用焊锡膏代替金导线来实现芯片正负电极与基板(或支架)导电端的电性连通,节省了金导线,增大了导电面积,从而提高了光源的效率并节省了资源。
3).本发明把固定芯片和焊接导线两道工序缩减为一道工序,简化了工艺流程,节约了设备和人工成本。
4).本发明不仅可应用在金属基板的LED光源的封装上,同时也可应用在玻璃基板、陶瓷基板等非金属基板的LED光源的封装。
应当理解的是,本发明的应用不限于上述的举例,对本领域普通技术人员来说,可以根据上述说明加以改进或变换,所有这些改进和变换都应属于本发明所附权利要求的保护范围。

Claims (8)

1.一种LED封装方法,其特征在于,包括:
A、将用来制作LED光源的基板或支架固定;
B、把基板或支架上需要与LED芯片电极粘接的导电端通过图像处理自动定位,并在要与LED芯片电极粘接的导电端点上焊锡膏;
C、把LED芯片的正负电极对准相应的基板或支架上的焊锡膏,并把LED芯片放置于基板或支架上;
D、再把放有LED芯片的基板或支架置于回流焊炉里使焊锡膏固化,以实现LED芯片与基板或支架间的牢靠固定及电性能的连通;
E、把已调配好的胶与荧光粉点在已完成固定的芯片上,把点有胶和荧光粉的基板或支架置于烤箱里烘烤固化。
2.根据权利要求1所述的LED封装方法,其特征在于,所述步骤B还包括:点焊锡膏的量根据芯片大小做调整。
3.根据权利要求1所述的LED封装方法,其特征在于,所述步骤C还包括:LED芯片在基板或支架上的放置位置误差<0.1mm,且歪斜误差<10℃。
4.根据权利要求1所述的LED封装方法,其特征在于,所述步骤D还包括:回流焊各温区的温度设定为80℃~330℃,并且设定回流焊的传送速度为一个温区运行约20秒~65秒。
5.根据权利要求1所述的LED封装方法,其特征在于,所述步骤E还包括:把点有胶和荧光粉的基板或支架置于120℃~150℃的烤箱里烘烤30分钟。
6.根据权利要求1所述的LED封装方法,其特征在于,所述焊锡膏是采用金属合金材料制成的锡银铜合金膏,金锡合金膏,铅锡合金膏等。
7.一种LED装置,其特征在于,包括用于安装LED芯片的基板或支架,还包括设置在所述基板或支架上的用于与LED芯片的正负电极分别接触连接的焊锡膏,以及设置在所述焊锡膏上面倒装的LED芯片;所述LED芯片通过其正负电板连接设置在所述焊锡膏上;并且所述LED装置采用权利要求1-5任一项所述LED封装方法封装而成。
8.根据权利要求7所述的LED装置,其特征在于,所述焊锡膏是采用金属合金材料制成的锡银铜合金膏,金锡合金膏,铅锡合金膏等焊锡膏。
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