CN214797402U - 一种球状引脚栅格阵列封装结构 - Google Patents

一种球状引脚栅格阵列封装结构 Download PDF

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CN214797402U
CN214797402U CN202121197414.XU CN202121197414U CN214797402U CN 214797402 U CN214797402 U CN 214797402U CN 202121197414 U CN202121197414 U CN 202121197414U CN 214797402 U CN214797402 U CN 214797402U
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bga
adhesive
substrate
base plate
length
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李争
马勉之
张建东
徐召明
吝炜鹏
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Huatian Technology Nanjing 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
    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/15Structure, shape, material or disposition of the bump connectors after the connecting process
    • H01L2224/16Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
    • H01L2224/161Disposition
    • H01L2224/16151Disposition the bump connector connecting 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
    • H01L2224/16221Disposition the bump connector connecting 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
    • H01L2224/16225Disposition the bump connector connecting 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
    • 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
    • H01L2224/26Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
    • H01L2224/31Structure, shape, material or disposition of the layer connectors after the connecting process
    • H01L2224/32Structure, shape, material or disposition of the layer connectors after the connecting process of an individual layer connector
    • H01L2224/321Disposition
    • H01L2224/32151Disposition the layer connector connecting 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
    • H01L2224/32221Disposition the layer connector connecting 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
    • H01L2224/32225Disposition the layer connector connecting 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
    • 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
    • H01L2224/73Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
    • H01L2224/732Location after the connecting process
    • H01L2224/73201Location after the connecting process on the same surface
    • H01L2224/73203Bump and layer connectors
    • H01L2224/73204Bump and layer connectors the bump connector being embedded into the layer connector
    • 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
    • H01L2224/80Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
    • H01L2224/83Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a layer connector
    • H01L2224/83909Post-treatment of the layer connector or bonding area
    • H01L2224/83951Forming additional members, e.g. for reinforcing, fillet sealant

Abstract

本实用新型公开了一种球状引脚栅格阵列封装结构,在基板和BGA基板之间的四个角之间设置粘结胶,进而使用绝缘粘结胶固定BGA四边,使CTE失配后导致的形变减少,从而增加BGA四角焊球可靠性和使用寿命。

Description

一种球状引脚栅格阵列封装结构
技术领域
本实用新型属于封装技术领域,涉及一种球状引脚栅格阵列封装结构。
背景技术
球状引脚栅格阵列封装结构(BGA)为新型的封装技术,采用BGA技术封装的内存,可以使内存在体积不变的情况下内存容量提高两到三倍,BGA与TSOP相比,具有更小的体积,更好的散热性能和电性能。但是在工艺验证中发现,BGA在进行封装芯片二次封装可靠性部分验证时,BGA基板焊盘通过钢网印刷的锡膏与BGA封装芯片焊接,产品在做温度循环试验(TCT)可靠性后失效,通过测量翘曲数据,BGA颗粒在27℃~260℃均呈现如下图1所示的,分析原因后发现现有的BGA焊球和基板的热膨胀系数失配导致BGA封装结构中的四角锡球断裂。
实用新型
本实用新型的目的在于克服上述现有技术的缺点,提供一种球状引脚栅格阵列封装结构,以解决现有技术中采用BGA封装易于失效的技术问题。
为达到上述目的,本实用新型采用以下技术方案予以实现:
一种球状引脚栅格阵列封装结构,包括基板(4)、所述基板(4)上设置有若干个锡球(3),所有锡球(3)的上表面共同连接有BGA基板(1),所述BGA基板(1)的四个角通过粘结胶(2)和基板(4)连接。
本实用新型的进一步改进在于:
优选的,所述基板(4)的上端面设置有塑封体(5)。
优选的,所述粘结胶(2)的顶端和塑封体(5)的侧壁连接。
优选的,粘结胶(2)的A段长度长于B段长度,所述A段长度为粘结胶(2)在BGA基板(1)长度方向的粘结长度,所述B段长度为粘结胶(2)在BGA基板(1)宽度方向的粘结长度。
优选的,所述粘结胶(2)的固化温度>245℃。
优选的,所述粘结胶(2)的高度为0.8mm-1.2mm。
优选的,四个角处的粘结胶(2)有部分渗入至BGA基板(1)和基板(4)之间。
优选的,所述粘结胶(2)为环氧树脂。
与现有技术相比,本实用新型具有以下有益效果:
本实用新型公开了一种球状引脚栅格阵列封装结构,在基板和BGA基板之间的四个角之间设置粘结胶,进而使用绝缘粘结胶固定BGA四边,使CTE失配后导致的形变减少,从而增加BGA四角焊球可靠性和使用寿命。
进一步的,基板的上端面设置有塑封体,完成整个装置的塑封。
进一步的,粘结胶的顶端和塑封体的侧壁连接,保证连接强度。
进一步的,粘结胶的A段长度长于B段长度,保证BGA基板长边的粘结强度大于短边。
进一步的,粘结胶的固化温度大于245℃,保证该粘结胶能够在较高的温度下即实现快速固化。
进一步的,粘结胶的高度设置在0.8-1.2mm之间,保证粘结胶能够充分的和塑封体接触,进而将BGA基板固定在基板上。
进一步的,部分粘结胶还渗入至BGA基板和基板之间,保证连接强度。
附图说明
图1为现有技术中的失效结构;
图2为本实用新型的侧视图;
图3为本实用新型的俯视图;
图4为本实用新型的工艺流程图;
图5为实物的制备流程图;其中,(a)图为基板;(b)图为涂覆粘结胶;(c)图为粘结BGA基板。
其中:1-BGA基板;2-粘结胶;3-锡球;4-基板;5-塑封体。
具体实施方式
下面结合附图对本实用新型做进一步详细描述:
在本实用新型的描述中,需要说明的是,术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本实用新型和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本实用新型的限制;术语“第一”、“第二”、“第三”仅用于描述目的,而不能理解为指示或暗示相对重要性;此外,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以具体情况理解上述术语在本实用新型中的具体含义。
本实用新型公开了一种球状引脚栅格阵列封装结构,该封装结构包括基板4,基板4上设置有若干个等间距排布的锡球3,所有锡球3的上端连接有BGA基板1,BGA基板1的面积小于基板4的面积,BGA基板1上塑封有塑封体5。
为了加强BGA基板1和基板4之间的连接能力,在BGA基板1的四个角粘附粘结胶2,参见图2,因此粘结胶2分为四个部分,可以看出,每一部分的粘结胶2的截面类似于梯形,其上端和BGA基板1的侧壁连接,其下端和基板4固定连接。参见图3,每一个角的粘结胶2包括两部分,具体的包括A段和B段,其中A段为设置在BGA基板1长边上的粘结胶2,B段为BGA基板1上设置在短边上的粘结胶2,保证BGA基板1上长度更长的边能够受到更强的粘结力。粘结胶2的高度为0.8mm-1.2mm,粘结胶2的高度为粘结胶2和塑封体5接触面最高点和基板4上表面之间的距离。
参见图2,粘结胶2一方面接触塑封体5的边部、BGA基板1的边部,进而从边部和基板4连接,另一方面在BGA基板1和基板4之间还摄入了部分粘结胶2,保证连接强度。该粘结胶2需要有以下性能:(1)在回流炉(245℃)短时间可固化;(2)绝缘和粘结力强;(3)无卤素可返修。
该实用新型的制备过程为:
预先在基板Bond Pad上印刷锡膏,在BGA四角划胶,贴装BGA颗粒后回流焊接,以解决产品四角应力导致的锡球carck失效。
以上所述仅为本实用新型的较佳实施例而已,并不用以限制本实用新型,凡在本实用新型的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本实用新型的保护范围之内。

Claims (8)

1.一种球状引脚栅格阵列封装结构,其特征在于,包括基板(4)、所述基板(4)上设置有若干个锡球(3),所有锡球(3)的上表面共同连接有BGA基板(1),所述BGA基板(1)的四个角通过粘结胶(2)和基板(4)连接。
2.根据权利要求1所述的一种球状引脚栅格阵列封装结构,其特征在于,所述基板(4)的上端面设置有塑封体(5)。
3.根据权利要求2所述的一种球状引脚栅格阵列封装结构,其特征在于,所述粘结胶(2)的顶端和塑封体(5)的侧壁连接。
4.根据权利要求1所述的一种球状引脚栅格阵列封装结构,其特征在于,粘结胶(2)的A段长度长于B段长度,所述A段长度为粘结胶(2)在BGA基板(1)长度方向的粘结长度,所述B段长度为粘结胶(2)在BGA基板(1)宽度方向的粘结长度。
5.根据权利要求1所述的一种球状引脚栅格阵列封装结构,其特征在于,所述粘结胶(2)的固化温度>245℃。
6.根据权利要求1所述的一种球状引脚栅格阵列封装结构,其特征在于,所述粘结胶(2)的高度为0.8mm-1.2mm。
7.根据权利要求1所述的一种球状引脚栅格阵列封装结构,其特征在于,四个角处的粘结胶(2)有部分渗入至BGA基板(1)和基板(4)之间。
8.根据权利要求1-7任意一项所述的球状引脚栅格阵列封装结构,其特征在于,所述粘结胶(2)为环氧树脂。
CN202121197414.XU 2021-05-31 2021-05-31 一种球状引脚栅格阵列封装结构 Active CN214797402U (zh)

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