CN102623359A - 半导体封装结构及其制造方法 - Google Patents

半导体封装结构及其制造方法 Download PDF

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CN102623359A
CN102623359A CN2012101121470A CN201210112147A CN102623359A CN 102623359 A CN102623359 A CN 102623359A CN 2012101121470 A CN2012101121470 A CN 2012101121470A CN 201210112147 A CN201210112147 A CN 201210112147A CN 102623359 A CN102623359 A CN 102623359A
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substrate
chip
adhesive material
conducting element
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洪嘉临
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Advanced Semiconductor Engineering Inc
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Abstract

本发明关于一种半导体封装结构及其制造方法,本发明的制造方法利用一模具覆盖于导电元件上,该模具的一内表面具有一薄膜,该薄膜接触芯片的一表面,且该薄膜容置这些导电元件的部分,使一封胶材料包覆基板的第一表面、该芯片及部分这些导电元件,且暴露该芯片的该表面。由于利用该薄膜接触该芯片的该表面,且该薄膜容置这些导电元件的部分,以使部分这些导电元件及该芯片的该表面暴露,故不须已知移除部分封胶材料的步骤,及不须移除残胶,也不会造成焊球表面的污染。因此可简化工艺、缩短工艺时间及降低制造成本,以利于量产。

Description

半导体封装结构及其制造方法
技术领域
本发明关于一种半导体封装结构及其制造方法。
背景技术
已知堆迭式封装层迭结构(package on package,PoP)包括一下封装结构及一上封装结构。已知下封装结构利用外露的焊球与上封装结构电性连接,故须去除部分封胶材料至使焊球外露,以利与上封装结构接合。目前去除部分封胶材料有两种方式,第一种是利用切割方式移除部分封胶材料,另一种方式是利用激光烧融的方式移除部分封胶材料。此二种方式除了在机台的精度要求上是非常高以外,在移除部分封胶材料后,除了会造成残胶外,也会造成焊球表面的污染,为了要去除以上两种外来污染,必需要增加一道清除工艺,进而使成本上升。
发明内容
本发明提供一种半导体封装结构的制造方法。首先,提供一基板,该基板具有一第一表面及一第二表面。接着,形成数个导电元件于该基板的该第一表面。再设置一芯片至该基板的该第一表面,且该芯片电性连接至该基板。接着,覆盖一模具于这些导电元件上,该模具的一内表面具有一薄膜,该薄膜接触该芯片的一表面,且该薄膜容置这些导电元件的部分。接着,形成一封胶材料以包覆该基板的第一表面、该芯片及部分这些导电元件,且暴露该芯片的该表面。
本发明另提供一种半导体封装结构,包括:一基板、一芯片、数个导电元件及一封胶材料。该基板具有一第一表面及一第二表面。该芯片设置于该基板的该第一表面,且电性连接至该基板。这些导电元件设置于该基板的该第一表面。该封胶材料利用一模具进行灌模工艺而成,该模具的一内表面具有一薄膜,该薄膜接触该芯片的一表面,且该薄膜容置这些导电元件的部分,该封胶材料包覆该基板的该第一表面、该芯片及部分这些导电元件,且暴露该芯片的该表面。
本发明又提供一种半导体封装结构,包括:一基板、一芯片、数个导电元件、一第一封胶材料、一上基板、一上芯片及一第二封胶材料。该基板具有一第一表面及一第二表面。该芯片设置至该基板的该第一表面,且电性连接至该基板。这些导电元件设置于该基板的该第一表面。该第一封胶材料利用一模具进行灌模工艺而成,该模具的一内表面具有一薄膜,该薄膜接触该芯片的一表面,且该薄膜容置这些导电元件的部分,该第一封胶材料包覆该基板的该第一表面、该芯片及部分这些导电元件,且暴露该芯片的该表面。该上基板具有一第一表面及一第二表面,且该第二表面电性连接这些导电元件。该上芯片设置至该上基板的该第一表面,且电性连接至该上基板。该第二封胶材料包覆该上基板的该第一表面及该上芯片。
由于利用该薄膜接触该芯片的该表面,且该薄膜容置这些导电元件的部分,以使部分这些导电元件及该芯片的该表面暴露,故不须已知移除部分封胶材料的步骤,及不须移除残胶,也不会造成焊球表面的污染。因此可简化工艺、缩短工艺时间及降低制造成本,以利于量产。
附图说明
图1显示本发明半导体封装结构的一实施例的示意图;
图2至图8显示本发明半导体封装结构的制造方法的一实施例的示意图;
图9显示本发明半导体封装结构的另一实施例的示意图;
图10显示本发明半导体封装结构的上封装结构的另一实施例的示意图;
图11显示本发明半导体封装结构的再一实施例的示意图;
图12显示本发明半导体封装结构的又一实施例的示意图;及
图13为图12的导电元件及凹槽的部分局部放大示意图。
具体实施方式
参考图1,显示本发明半导体封装结构的一实施例的示意图。本发明半导体封装结构10包括:一基板11、数个导电元件12、一芯片13、一第一封胶材料14、一上基板15、一上芯片16及一第二封胶材料17。在本实施例中,本发明半导体封装结构10为堆迭式封装层迭结构(package on package,PoP)。
该基板11具有一第一表面111及一第二表面112,该第二表面112相对于该第一表面111。这些导电元件12设置于该基板11的该第一表面111。该芯片13设置至该基板11的该第一表面111,且电性连接至该基板11。在本实施例中,利用数个凸块131,设置于该基板11及该芯片13间,电性连接该基板11及该芯片13;且利用一底胶132,设置于该基板11及该芯片13间,包覆这些凸块131。
这些导电元件12设置于该芯片13周围,且这些导电元件12的一顶点相对于该基板的该第一表面的高度大于该芯片13的一表面133相对于该基板的该第一表面的高度。该第一封胶材料14包覆该基板11的该第一表面111、该芯片13及部分这些导电元件12,且暴露该芯片13的该表面133。
该上基板15具有一第一表面151及一第二表面152,且该第二表面152电性连接这些导电元件12。该上芯片16设置至该上基板15的该第一表面151,且电性连接至该上基板15。该第二封胶材料17包覆该上基板15的该第一表面151及该上芯片16。
参考图2至图8,显示本发明半导体封装结构的制造方法的一实施例的示意图。参考图2,提供一基板11,该基板11具有一第一表面111及一第二表面112。再形成数个导电元件12于该基板11的该第一表面111。在一实施例中,这些导电元件12可为焊球。
参考图3,设置一芯片13至该基板11的该第一表面111,且该芯片13电性连接至该基板。在本实施例中,利用数个凸块131,设置于该基板11及该芯片13间,电性连接该基板11及该芯片13。参考图4,本发明的该制造方法另包括形成一底胶132于该基板11及该芯片13间,且包覆这些凸块131的步骤。
参考图5,覆盖一模具21于该基板11的该第一表面111上,该模具21的一内表面具有一薄膜22,该薄膜22接触该芯片13的一表面133,且该薄膜22容置这些导电元件12的部分,亦即,该薄膜22覆盖至这些导电元件12上时,受这些导电元件12挤压而陷入,以容置这些导电元件12的部分上端。
参考图6,注入第一封胶材料14于该模具21内,以形成第一封胶材料14包覆该基板11的第一表面111、该芯片13及部分这些导电元件12。且因该薄膜22接触该芯片13的该表面133,第一封胶材料14未包覆该芯片13的该表面133。再移除该模具21及该薄膜22,而该芯片13的该表面133暴露于该第一封胶材料14的外,且该芯片13的该表面133大致与该第一封胶材料14的一上表面齐平,以制造得本发明的一半导体封装结构30,如图7所示。在本实施例中,显露的部分这些导电元件12的高度为这些导电元件12整体高度的20%-70%。亦即,该封胶材料包覆这些导电元件整体高度的30%-80%。
本发明的该半导体封装结构30可为上述本发明半导体封装结构10(图1)的下封装结构,其结构如上所述,在此不再叙述。由于利用该薄膜22接触该芯片13的该表面133,且该薄膜22容置这些导电元件12的部分,以使部分这些导电元件12及该芯片13的该表面133暴露,故不须已知移除部分封胶材料的步骤,及不须移除残胶,也不会造成焊球表面的污染。因此可简化工艺、缩短工艺时间及降低制造成本,以利于量产。
参考图8,本发明半导体封装结构的制造方法另包括提供一上封装结构40的步骤。该上封装结构40包括一上基板15、一上芯片16、一第二封胶材料17及数个接合焊垫41。该上基板15具有一第一表面151及一第二表面152,该上芯片16电性连接该上基板15的该第一表面151,这些接合焊垫41设置于该上基板15的该第二表面152。
再堆迭该上封装结构40的这些接合焊垫41于这些导电元件12上。接着,进行回焊(Reflow)步骤,使得这些接合焊垫41及这些导电元件12电性连接,以制造得本发明的该半导体封装结构10,如图1所示。且另形成数个第一焊球18于该基板11的该第二表面112,以与外部元件电性连接。
参考图9,显示本发明半导体封装结构的另一实施例的示意图。与本发明半导体封装结构10不同之处在于本发明半导体封装结构50不具有底胶132,而利用第一封胶材料14包覆这些凸块131。本发明半导体封装结构50与本发明半导体封装结构10相同的元件予以相同的标号,且不再叙述。
参考图10,显示本发明半导体封装结构的上封装结构的另一实施例的示意图。本发明半导体封装结构的该上封装结构70包括一上基板15、一上芯片16、一第二封胶材料17、数个接合焊垫71及数个第二焊球72。与上述图8的该上封装结构40不同之处在于,这些第二焊球72设置于这些接合焊垫71。
参考图11,显示本发明半导体封装结构的再一实施例的示意图。与本发明半导体封装结构10不同之处在于本发明半导体封装结构80包括图10的该上封装结构70,故这些第二焊球72与这些导电元件12电性连接。本发明半导体封装结构80与本发明半导体封装结构10相同的元件予以相同的标号,且不再叙述。
参考图12,显示本发明半导体封装结构的又一实施例的示意图;图13为图12的导电元件及凹槽的部分局部放大示意图。本发明半导体封装结构60可为上述本发明半导体封装结构10(图1)的下封装结构,与上述本发明半导体封装结构30不同之处在于本发明半导体封装结构60具有数个凹槽61,形成于这些导电元件12的周围的第一封胶材料14。在本实施例中,可利用激光烧融的方式移除在这些导电元件12的周围的第一封胶材料14,以形成这些凹槽61,使得在进行回焊(Reflow)步骤时,使这些接合焊垫41与这些导电元件12顺利电性连接。其中,这些凹槽61的外围宽度A大于这些导电元件12的直径约20%至50%;且这些凹槽61的深度B约为这些导电元件12的直径的5%至50%。
惟上述实施例仅为说明本发明的原理及其功效,而非用以限制本发明。因此,习于此技术的人士对上述实施例进行修改及变化仍不脱本发明的精神。本发明的权利范围应如权利要求书所列。

Claims (9)

1.一种半导体封装结构的制造方法,包括以下步骤:
(a)提供一基板,该基板具有一第一表面及一第二表面;
(b)形成数个导电元件于该基板的该第一表面;
(c)设置一芯片至该基板的该第一表面,且该芯片电性连接至该基板;
(d)覆盖一模具于该基板上,该模具的一内表面具有一薄膜,该薄膜接触该芯片的一表面,且该薄膜容置所述导电元件的部分;及
(e)形成一封胶材料以包覆该基板的该第一表面、该芯片及部分所述导电元件,且暴露该芯片的该表面。
2.如权利要求1的方法,其中该步骤(e)后另包括于所述导电元件的周围的封胶材料形成凹槽的步骤。
3.如权利要求1的方法,其中该步骤(e)之后更包括:
(f)提供一上封装结构,该上封装结构包括一上基板、一上芯片及数个接合焊垫,该上基板具有一第一表面及一第二表面,该上芯片电性连接该上基板的该第一表面,所述接合焊垫设置于该上基板的该第二表面;
(g)堆迭所述接合焊垫于所述导电元件上;及
(h)进行回焊,使得所述接合焊垫及所述导电元件电性连接。
4.一种半导体封装结构,包括:
一基板,具有一第一表面及一第二表面;
一芯片,设置于该基板的该第一表面,且电性连接至该基板;
数个导电元件,设置于该基板的该第一表面;及
一封胶材料,利用一模具进行灌模工艺而成,该模具的一内表面具有一薄膜,该薄膜接触该芯片的一表面,且该薄膜容置所述导电元件的部分,该封胶材料包覆该基板的该第一表面、该芯片及部分所述导电元件,且暴露该芯片的该表面。
5.如权利要求4的半导体封装结构,另包括数个凹槽,形成于所述导电元件的周围的封胶材料。
6.如权利要求5的半导体封装结构,其中所述凹槽的外围宽度大于所述导电元件的直径约20%至50%;且所述凹槽的深度约为所述导电元件的直径的5%至50%。
7.如权利要求4的半导体封装结构,该封胶材料包覆所述导电元件整体高度的30%-80%。
8.一种堆迭式封装结构,包括:
一基板,具有一第一表面及一第二表面;
一芯片,设置至该基板的该第一表面,且电性连接至该基板;
数个导电元件,设置于该基板的该第一表面;
一第一封胶材料,利用一模具进行灌模工艺而成,该模具的一内表面具有一薄膜,该薄膜接触该芯片的一表面,且该薄膜容置所述导电元件的部分,该第一封胶材料包覆该基板的该第一表面、该芯片及部分所述导电元件,且暴露该芯片的该表面;
一上基板,具有一第一表面及一第二表面,且该第二表面电性连接所述导电元件;
一上芯片,设置至该上基板的该第一表面,且电性连接至该上基板;及
一第二封胶材料,包覆该上基板的该第一表面及该上芯片。
9.如权利要求8的堆迭式封装结构,另包括数个凹槽,形成于所述导电元件的周围的封胶材料。
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