CN201171056Y - 功率led - Google Patents

功率led Download PDF

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Publication number
CN201171056Y
CN201171056Y CNU2007200613928U CN200720061392U CN201171056Y CN 201171056 Y CN201171056 Y CN 201171056Y CN U2007200613928 U CNU2007200613928 U CN U2007200613928U CN 200720061392 U CN200720061392 U CN 200720061392U CN 201171056 Y CN201171056 Y CN 201171056Y
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China
Prior art keywords
substrate
lens
injecting glue
resin
power led
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Expired - Lifetime
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CNU2007200613928U
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English (en)
Inventor
余彬海
李军政
夏勋力
李绪锋
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Foshan NationStar Optoelectronics Co Ltd
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Foshan NationStar Optoelectronics Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/47Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805Shape
    • H01L2224/4809Loop shape
    • H01L2224/48091Arched
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/47Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/481Disposition
    • H01L2224/48151Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/48221Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/48225Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
    • H01L2224/48227Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation connecting the wire to a bond pad of the item

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Abstract

本实用新型公开了一种功率LED,该功率LED包括基板、LED芯片、封装胶体形成的透镜、内引线,LED芯片安装在基板上并与电极引线连接,其特征是,基板具有注胶孔,注胶孔内均充满有封装胶体,该封装胶体与形成透镜的胶体连成一体。在透镜成型制备过程中,在基板上加工的注胶孔,加工位置设置于透镜位置的下方范围内,其数量为两个或两个以上。本实用新型提供的功率LED增加了封装胶体对基板的附着强度,具有生产工艺方便、可靠性高的优点。

Description

功率LED
技术领域
本实用新型专利涉及一种发光二极管(LED)技术,特别是涉及一种大功率LED封装结构。
背景技术
目前的发光二极管(LED)基本的组成部分包括基板(框架)、LED芯片、封装胶体形成的透镜、内引线。内引线连接LED芯片上的电极到基板上的电极,保证有基板上的外部电极向LED芯片输送电流;LED芯片属于半导体材料,由于可发出可见光,一般被应用于信号指示、显示照明等领域。封装胶体的主要作用是保护LED芯片,并将LED芯片发出的光导出,起到光学透镜的作用,因此一般为透明材料,如环氧树脂、硅橡胶等。
传统的功率LED一种是注胶透镜成型结构,一种是透镜预成型结构。下面分别介绍:
如图1、图2所示,侧面注胶的方法如班斯集团公司申请的名称为“在处理过的引线框上具有过压成型透镜的LED装置及其方法”(中国专利申请号:200610001487.0),提出了一种侧面注胶的LED装置。其主要内容是将模具101压在处理过的引线框架102上,从模具101的开口处注入胶体103,胶体103硬化完成后,完成LED芯片104的封装。该实用新型的注胶孔105是设置于模具101上。注胶完成后,注胶孔105残余的胶体将影响成型后透镜的完整性,而且胶体103与框架102的连接仅仅为框架上表面的表面附着力,连接强度低。
如图3所示,透镜预成型的方法主要是将已经成型的透镜201安装在框架202(或基板)上,在透镜201与基板202之间的空隙填充封装胶体203,靠框架结构及胶体附着力固定透镜201。这种透镜预成型的工艺生产效率低,由于受透镜结构及材料的限制,极大限制了该类产品的发展。
实用新型内容
本实用新型的目的在于克服现有技术之不足,而提供一种生产效率高、可靠性高的注胶透镜一次成型的功率LED封装结构。
本实用新型是通过如下技术方案来实现上述目的的:该功率LED包括基板、LED芯片、封装胶体形成的透镜、内引线,LED芯片安装在基板上并与电极引线连接,其特征是,基板具有注胶孔,注胶孔内均充满有封装胶体,该封装胶体与形成透镜的胶体连成一体。
在透镜成型制备过程中,在基板上加工的注胶孔,加工位置设置于透镜位置的下方范围内,其数量为两个或两个以上。
采用上述结构的功率LED具有如下优点:
1、产品可靠性高,注胶孔内的胶体与形成透镜的胶体连成一体,增加了封装胶体对基板的附着强度;
2、生产工艺简单;
3、产品满足回流焊接条件要求。
附图说明
图1侧面注胶方法示意图;
图2侧面注胶完成产品结构图;
图3透镜预成型方法产品结构图;
图4用于透镜成型的模具及芯片安放完成的基板结构图;
图5模具装配及注胶方法示意图;
图6封装胶体硬化完成后取下模具示意图
图7-图10最终产品外形示意图。
附图标记说明:301模具  302腔体  303、304接触面  305板306注胶孔  307排气孔  308LED芯片  309引线  310引线电极311封装胶体  312注胶设备
具体实施方式
本实用新型具体实施实例说明如下:其产品最终外形结构示意图如图7-10所示,包括基板305、封装胶体311形成的透镜,基板具有注胶孔306和排气孔307,注胶孔306和排气孔307内均充满有封装胶体311,该封装胶体311与形成透镜的胶体连成一体,排气孔307为两个或以上,注胶孔306位于透镜位置的下方范围内。
本实用新型是通过如下工艺步骤制备的:
1、透镜成型模具准备:
如图4,在模具301材料的一侧制备出符合透镜形状的腔体302,腔体302四周保持平整,确保模具301与基板305之间的接触面303、304充分接触。
2、基板的准备:
在基板305上加工采用孔加工工艺注胶孔306和排气孔307,如图4所示,加工位置在透镜位置的下方内,数量各为1个。将LED芯片308安放于基板305上,采用超声焊接工艺,采用引线309将LED芯片308的电极与基板305上的引线电极310电气连接。
3、透镜模具与基板压合:
将模具301采用外力压在基板305的上方,将压合完成的基板305和模具301倒转,如图5所示,中间包封LED芯片308。
4、封装胶体注入:
如图5所示,将液态的封装胶体311采用注胶设备312从基板305底部的注胶孔306注入,随着所述封装胶体311的注入,模具301与基板305之间的空气从基板301底部的排气孔307排出,封装胶体311充满整个排气孔307时结束注胶操作。
5、封装胶体固化:
采用加热的方式使封装胶体311固化。
6、取模:
如图6,封装胶体311从液态转变为固态后,透镜312成型。取掉模具301,封装胶体311与模具301分离,封装胶体311与基板305粘接在一起,完成封装LED芯片308。

Claims (4)

1、一种功率LED,包括基板、LED芯片、封装胶体形成的透镜、内引线,LED芯片安装在基板上并与电极引线连接,其特征是,基板具有注胶孔,注胶孔内均充满有封装胶体,该封装胶体与形成透镜的胶体连成一体。
2、根据权利要求1所述的功率LED,其特征在于,所述基板上的注胶孔位于形成透镜的胶体下方范围内。
3、根据权利要求1所述的功率LED,其特征在于所述注胶孔的数量为两个或两个以上。
4、根据权利要求1所述的功率LED,其特征在于所述封装胶体充满注胶孔内。
CNU2007200613928U 2007-12-13 2007-12-13 功率led Expired - Lifetime CN201171056Y (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117316786A (zh) * 2023-11-24 2023-12-29 华羿微电子股份有限公司 一种控制全包封产品绝缘不良的方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117316786A (zh) * 2023-11-24 2023-12-29 华羿微电子股份有限公司 一种控制全包封产品绝缘不良的方法
CN117316786B (zh) * 2023-11-24 2024-03-12 华羿微电子股份有限公司 一种控制全包封产品绝缘不良的方法

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