CN102163661B - 一种白光led封装方法 - Google Patents
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Abstract
本发明公开了一种白光LED封装方法,主要包括固晶步骤,焊线步骤,配制荧光胶和点荧光胶步骤。本发明中的荧光胶是由下列重量份的原料配制的,红色荧光粉TMR-200647-380490,0.1~1;黄色硅酸盐荧光粉SY450-3450-460,1~10;氮化物荧光粉R6432,0.1~1;硅胶6301,100。与现有技术的采用成分一定的YAG荧光粉相比,由于三种荧光粉的比例可灵活调整选取,能弥补各色的不足,提高了光的还原性,使封装后制得的白光LED还原性好,散热性好,可广泛应用于液晶显示器的背光源。
Description
技术领域
本发明涉及半导体器件封装技术领域,具体地说,涉及一种白光LED封装方法。
背景技术
背光源(BackLight)是位于液晶显示器(LCD)背后的一种光源,它的发光效果将直接影响到液晶显示模块(LCM)视觉效果。液晶显示器本身并不发光,它显示图形或字符是它对光线调制的结果。其中,白光LED是可用作背光源的光源之一。
通常的白光LED是在蓝光LED芯片上涂上YAG荧光粉,利用蓝光LED照射此荧光物质以产生与蓝光互补的黄光,再将互补的黄光和蓝光予以混合,便可得出肉眼所需的白光,从而制得白光LED。但是,由于购买的YAG荧光粉的成分一定,不可调节,导致难以有效控制最终制得的白光LED的色坐标及色温,封出的白光管还原性差,散热性差,难以满足用作液晶显示器背光源的要求。
发明内容
本发明所要解决的技术问题是:提供一种还原性好,散热性好,可满足液晶电视背光源要求的白光LED封装方法。
为解决上述技术问题,本发明的技术方案是:一种白光LED封装方法,包括以下步骤
(1)固晶:提供LED支架,在所述LED支架的反射杯底部点涂银浆CNS113,在银浆区贴上齐纳管芯片,然后置于烘箱中烘烤,设置烘箱温度185℃~195℃,烘烤时间60min;
之后,在所述LED支架的反射杯底部点涂绝缘胶JM-20,将蓝光芯片贴到绝缘胶区,然后置于烘箱中烘烤,设置烘箱温度155℃~165℃,烘烤时间90min;
(2)焊线:用金丝球焊机将所述蓝光芯片的正、负极引脚与所述LED支架的正、负电极之间分别焊接;所述蓝光芯片与所述齐纳管芯片之间并联连接;
(3)配制荧光胶:所述荧光胶是由下列重量份的原料配制的,红色荧光粉TMR-200647-380490,0.1~1;黄色硅酸盐荧光粉SY450-3450-460,1~10;氮化物荧光粉R6432,0.1~1;硅胶6301,100;混合均匀后,用真空脱泡机脱泡,制得荧光胶;
(4)点荧光胶:用点胶机将制得的荧光胶均匀地涂在所述LED支架的反射杯里,以胶量与反射杯的上沿切平为宜;
之后,置于烘箱中烘烤,设置烘箱温度145℃~155℃,烘烤60min后取出,即制得白光LED。
作为优选的技术方案,所述荧光胶是由下列重量份的原料配制的,红色荧光粉TMR-200647-380490,0.1~0.3;黄色硅酸盐荧光粉SY450-3450-460,2~4;氮化物荧光粉R6432,0.5~0.8;硅胶6301,100。
作为优选的技术方案,所述蓝光芯片是波长为440nm~442.5nm,亮度为5000mcd,尺寸为22mil*45mil的长方形蓝光芯片;所述齐纳管芯片的规格为SD-01066G。
作为优选的技术方案,在所述步骤(4)之后还包括剥离步骤、分光分色步骤和编带包装步骤。
由于采用了上述技术方案,本发明的有益效果是:本发明由于在蓝光芯片上涂的荧光胶是由下列重量份的原料配制的,红色荧光粉TMR-200647-380490,0.1~1;黄色硅酸盐荧光粉SY450-3450-460,1~10;氮化物荧光粉R6432,0.1~1;硅胶6301,100。与现有技术的采用成分一定的YAG荧光粉相比,由于三种荧光粉的比例可灵活调整选取,能弥补各色的不足,提高了光的还原性,使封装后制得的白光LED还原性好,散热性好,可广泛应用于液晶显示器的背光源。
当本发明采用一个22mil*45mil的长方形蓝光芯片来替代两个通常的20mil*20mil的蓝光芯片时,可减少封装工艺步骤,降低成本,提高整个白光LED的亮度及其可靠性。
附图说明
下面结合附图和实施例对本发明进一步说明。
图1是本发明实施例固晶后的结构示意图;
图2是本发明实施例焊线后的结构示意图;
图3是本发明实施例点荧光胶后的结构示意图;
图中:1-LED支架;11-铜块;2-银浆区;3-齐纳管芯片;4-绝缘胶;5-蓝光芯片;6-金线;7-荧光胶;8-电极。
具体实施方式
实施例一
如图1、图2和图2共同所示,一种白光LED封装方法,包括以下步骤
(1)固晶:提供LED支架1,在所述LED支架1的反射杯底部设有铜块11,在偏离所述铜块11的中心处点涂银浆CNS113,银浆CNS113是徐州英剑纳米科技有限公司生产的中高温烧结银浆,再在银浆区2点上适量银胶与银浆混合,可实现共晶焊接,提高导热性能及最终的发光效果,将齐纳管芯片3贴到银浆区2,然后置于烘箱中烘烤,设置烘箱温度185℃~195℃,烘烤时间60min。本实施例中的齐纳管芯片3采用通盛(香港)有限公司的规格为SD-01066G的金电极抗静电稳压双向保护的齐纳管。
之后,在所述LED支架1的反射杯底部点涂绝缘胶4,本实施例中的绝缘胶4采用台湾吉盟公司的抗光衰绝缘胶JM-20,将蓝光芯片5贴到绝缘胶4的区域,然后置于烘箱中烘烤,设置烘箱温度155℃~165℃,烘烤时间90min。本实施例中的蓝光芯片5是波长为440nm~442.5nm,亮度为5000mcd,尺寸为22mil*45mil的长方形蓝光芯片,用一个22mil*45mil的长方形蓝光芯片来替代两个通常的20mil*20mil的蓝光芯片,可减少封装工艺步骤,降低成本,提高整个白光LED的亮度及其可靠性。
(2)焊线:固晶完成后,用金丝球焊机将所述蓝光芯片5的正、负极引脚通过金线6与所述LED支架1的电极8即正、负电极之间分别焊接;所述蓝光芯片5与所述齐纳管芯片3之间并联连接,齐纳管芯片3对蓝光芯片5起到稳压双向保护作用。
(3)配制荧光胶:本实施例中的荧光胶是由下列重量份的原料配制的,红色荧光粉TMR-200647-380490,0.1;黄色硅酸盐荧光粉SY450-3450-460,3.7;氮化物荧光粉R6432(不含硫),0.7;硅胶6301,100。混合均匀后,用真空脱泡机脱泡抽真空,即制得荧光胶。所述的红色荧光粉TMR-200647-380490,黄色硅酸盐荧光粉SY450-3450-460,和氮化物荧光粉R6432为美国intermatix(英特美)公司的产品;硅胶6301为美国道康宁公司的产品。
(4)点荧光胶:用点胶机将制得的荧光胶7均匀地涂在所述LED支架1的反射杯里,以胶量与反射杯的上沿切平为宜,如图3所示;
之后,置于烘箱中烘烤,设置烘箱温度145℃~155℃,烘烤60min后取出,即制得白光LED。
还包括后续常规步骤
(5)剥离,即将白光LED从整板上剥离下来。
(6)分光分色,设定分光参数,利用LED分光机对白光LED进行分光分色。
(7)编带包装,将分光分色后的白光LED进行包装,并根据需要盘带。
实施例二
实施例二与实施例一基本相同,不同之处在于:本实施例中的荧光胶是由下列重量份的原料配制的,红色荧光粉TMR-200647-380490,0.3;黄色硅酸盐荧光粉SY450-3450-460,1;氮化物荧光粉R6432(不含硫),0.8;硅胶6301,100。
实施例三
实施例三与实施例一基本相同,不同之处在于:本实施例中的荧光胶是由下列重量份的原料配制的,红色荧光粉TMR-200647-380490,1;黄色硅酸盐荧光粉SY450-3450-460,10;氮化物荧光粉R6432(不含硫),0.2;硅胶6301,100。
本发明由于在蓝光芯片上涂的荧光胶是由下列重量份的原料配制的,红色荧光粉TMR-200647-380490,0.1~1;黄色硅酸盐荧光粉SY450-3450-460,1~10;氮化物荧光粉R6432,0.1~1;硅胶6301,100。与现有技术的采用成分一定的YAG荧光粉相比,由于三种荧光粉的比例可灵活调整选取,能弥补各色的不足,提高了光的还原性,使封装后制得的白光LED还原性好,散热性好,可广泛应用于液晶显示器的背光源。
以上所述仅是本发明具体实施方式的举例,未详细述及部分为本领域中普通技术人员的公知常识。本发明的保护范围以权利要求的内容为准,任何基于本发明的技术启示而进行的等效变换,也在本发明的保护范围之内。
Claims (4)
1.一种白光LED封装方法,其特征在于:包括以下步骤
(1)固晶:提供LED支架,在所述LED支架的反射杯底部点涂银浆CNS113,在银浆区贴上齐纳管芯片,然后置于烘箱中烘烤,设置烘箱温度185℃~195℃,烘烤时间60min;
之后,在所述LED支架的反射杯底部点涂绝缘胶JM-20,将蓝光芯片贴到绝缘胶区,然后置于烘箱中烘烤,设置烘箱温度155℃~165℃,烘烤时间90min;
(2)焊线:用金丝球焊机将所述蓝光芯片的正、负极引脚与所述LED支架的正、负电极之间分别焊接;所述蓝光芯片与所述齐纳管芯片之间并联连接;
(3)配制荧光胶:所述荧光胶是由下列重量份的原料配制的,红色荧光粉TMR-200647-380490,0.1~1;黄色硅酸盐荧光粉SY450-3450-460,1~10;氮化物荧光粉R6432,0.1~1;硅胶6301,100;混合均匀后,用真空脱泡机脱泡,制得荧光胶;
(4)点荧光胶:用点胶机将制得的荧光胶均匀地涂在所述LED支架的反射杯里,以胶量与反射杯的上沿切平为宜;
之后,置于烘箱中烘烤,设置烘箱温度145℃~155℃,烘烤60min后取出,即制得白光LED。
2.如权利要求1所述的一种白光LED封装方法,其特征在于:所述荧光胶是由下列重量份的原料配制的,红色荧光粉TMR-200647-380490,0.1~0.3;黄色硅酸盐荧光粉SY450-3450-460,2~4;氮化物荧光粉R6432,0.5~0.8;硅胶6301,100。
3.如权利要求1所述的一种白光LED封装方法,其特征在于:所述蓝光芯片是波长为440nm~442.5nm,亮度为5000mcd,尺寸为22mil*45mil的长方形蓝光芯片;所述齐纳管芯片的规格为SD-01066G。
4.如权利要求1、2或3所述的一种白光LED封装方法,其特征在于:在所述步骤(4)之后还包括剥离步骤、分光分色步骤和编带包装步骤。
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CN108010908B (zh) * | 2017-11-10 | 2019-11-22 | 江苏稳润光电有限公司 | 一种让人感官舒适的白光led封装方法 |
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