CN1595645A - 半导体芯片封装体的焊线排列结构 - Google Patents
半导体芯片封装体的焊线排列结构 Download PDFInfo
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Abstract
一种半导体芯片封装体的焊线排列结构,包括:至少一信号焊线,由一芯片连接至一封装基板上;以及至少两电源焊线,分别排列在信号焊线的两侧,由芯片连接至该封装基板。利用该电源焊线包围差动信号焊线组或者是一般信号焊线,而使得信号焊线能受到更完整的屏蔽保护。
Description
技术领域
本发明涉及一种半导体芯片的封装结构,特别涉及一种半导体芯片封装体的焊线排列结构。
背景技术
电子封装的目的可以归纳为传递电能、传递电路信号、提供散热途径与结构保护及支持。如果将芯片当作是人体中的头脑,那么各种电路零件可视为人体内部的各项器官,而电子封装则有如将这些器官组合而成的肌肉骨架,封装中的联机电路一如血管神经提供能量与电路信号传递的路径,以使此芯片与各种电路零件封装后所形成的电子产品的功能得以发挥。由于电子产品在工作频率与效能上不断推陈出新,因此为使电子产品的电气特性表现最佳,封装技术即是一种可使电子产品的效能与层次提升的重要因素。
以使用金属打线的高频电子封装为例,半导体芯片与内含多层电路板的封装基板间的电连接即可通过信号焊线旁包围接地线来达到较佳的电气特性。通常使用接地线可以达到隔离噪声与防止信号耦合干扰的效果,于是使用各种不同的焊线排列,成为半导体封装技术中一项创新的发明。
但是,在某些半导体芯片中,没有足够的接地线可以进行噪声隔离或阻止信号间的电感耦合现象,因此,必须使用其它的线路来完成此项工作。
发明内容
有鉴于此,本发明提出一种半导体芯片封装体的焊线排列结构及其排列方法,利用电源焊线来保护信号焊线的信号传递,利用电源焊线与信号焊线之间各种不同的排列方式,以及半导体芯片的焊垫与封装基板上的引脚的排列组合,完全保护信号焊线的信号传输,避免遭受到噪声干扰,隔绝信号焊线间的电感耦合现象。
本发明揭示一种半导体芯片封装体的焊线配置结构,在封装体的信号焊线的两侧,各配置一条电源焊线,以包围信号焊线,以完成噪声隔离与防止电感耦合效应。
该半导体芯片封装体的焊线排列结构,至少包含:至少一信号焊线,由一芯片连接至一封装基板上;以及至少两电源焊线,分别排列在该信号焊线的两侧,而且由该芯片连接至该封装基板。
具体而言,本发明揭示了一种半导体芯片封装体的焊线配置结构,在封装体的信号焊线的两侧,各配置两条电源焊线,而封装基板的引脚是以两两相错的方式进行排列,使得每一条或每一组信号焊线的两侧皆分别包围两条电源焊线,使得信号焊线的上下左右皆有电源焊线作为屏壁,降低信号焊线之间的电感耦合效应。
本发明还揭示了一种半导体芯片封装体的焊线配置结构,在差动信号焊线组的两侧,各配置至少一条电源焊线,使得一组差动信号焊线组至少两条或以上的电源焊线所包围,将会有助于差动信号焊线组的信号传递,降低噪声干扰与减少差动信号线组之间的信号干扰。
本发明又揭示了一种半导体芯片封装体的焊线配置结构,在差动信号焊线组的两侧,各配置两条电源焊线,使得一组差动信号焊线组至少由四条的电源焊线所包围,将会使得每一组差动信号焊线组在上下左右的方向将被电源焊线所包围,有助于差动信号焊线组的信号传递,减少差动信号焊线组之间的电感耦合干扰。
附图说明
图1A显示本发明的第一具体实施例,为半导体芯片封装体的焊线排列结构的俯视示意图;
图1B显示本发明的第一具体实施列,为半导体芯片封装体的焊线排列结构的剖面示意图;
图2A显示本发明的第二具体实施例,为半导体芯片封装体的焊线排列结构的俯视示意图;以及
图2B显示本发明的第二具体实施例,为半导体芯片封装体的焊线排列结构的剖面示意图。
其中,附图标记说明如下:
100 封装基板
11 半导体芯片
21 接地环
31 电源环
50 引脚
P1~P6 电源焊垫
S1+、S1-、S2+、S2-、S3+、S3-、S4+与S4- 信号焊垫
具体实施方式
为了在封装制程时,使信号焊线间不会互相干扰,且不会有信号焊线与接地线互相接触的情况发生。本发明特别考虑在信号焊线两旁,以电源焊线加以包围,且这些电源焊线与信号焊线一样从半导体芯片连接至封装基板之上,再由封装基板上的引脚短接至原本就用来耦接电源的电源环。以同时使信号焊线间不会互相干扰,且在封装制程时与封装制程之后,信号焊线与电源焊线间不会有任何接触。本发明揭示一种芯片封装体的焊线排列结构,至少一信号焊线连接芯片与封装基板上,并利用至少两条电源焊线,包围信号焊线的两侧,而电源焊线由芯片连接至封装基板。
请参考图1A,此图显示本发明的第一具体实施例的俯视示意图,于封装基板100之上安置半导体芯片11,此半导体芯片11连接在封装基板100的上表面,而且在封装基板100的上表面设置有接地环21与电源环31,在接地环21与电源环31的外围设置许多个引脚50。换言之,接地环21与电源环31设置在引脚50与半导体芯片11的中间。
请继续参阅图1A,在半导体芯片11上设置许多个焊垫,这些焊垫包括电源焊线与信号焊线,用来将半导体芯片11上的信号传输到封装基板100,或者将印刷电路板要传输至半导体芯片的信号或电源,经由封装基板100的引脚50,以焊线连接至半导体芯片11上的焊垫,达到信号传输的目的。半导体芯片11的焊垫,包括电源焊垫P1~P4、信号焊垫S1+、S1-、S2+、S2-、S3+、S3-、S4+与S4-。这些焊垫的排列方式是以两两交错的方式进行排列,换言之,这些焊垫以两排直线来进行排列,第一个焊垫排列在第一条直线上时,则第二个焊垫排列在第二条直线上,使得所有相邻的焊垫都是两两相错,如电源焊垫P1与信号焊垫S1+是相错开,不会排列在同一条直线之上;如信号焊垫S1+与信号焊垫S1-是相错开,也不会排列在同一条直线上。其中,信号焊垫S1+与S1-为差动信号(differential signal)组,当其中一个焊垫传输信号为1时,则另一个焊垫的传输信号一定为0,使得连接这两个焊垫的信号焊线所传输的信号一定是相反,使得高频电子组件能够有较好的信号传输品质。其它的差动信号组(例如:S2+与S2-,S3+与S3-,S4+与S4-)也以同样的方式来传输信号。
请继续参阅图1A,半导体芯片11上的焊垫经由焊线连接至封装基板100上的相对应的引脚50,使得半导体芯片上的电子组件,能够经由封装基板100来传输信号与供应电源。根据本发明的第一具体实施例,封装基板100上的引脚50的排列方式,是排列在同一直在线,而连接电源焊垫的引脚50以封装基板的内部布线来连接至封装基板100上的电源环31。
请参阅图1B,此图为图1A在AA’线的剖面图,显示出焊线的排列方式,经由在半导体芯片11上的焊垫排列,焊线的排列将会是每一组差动信号焊线(如S1+与S1-)的两侧分别紧邻一个电源焊线(如P1与P2),这将使得电源焊线将差动信号焊线包围起来。由于电源焊线具有稳定的信号性质,与接地线同样为直流信号,因此在差动信号焊线的两侧包围电源焊线,将会有助于差动信号焊线组的信号品质,避免两个差动信号组之间的信号干扰与电感耦合现象,对于高频电子组件而言,将有效提供信号传输品质。
请参阅图2A,此图显示本发明的第二具体实施例的俯视示意图,在半导体芯片11上的焊垫排列,包括电源焊垫P1~P6、信号焊垫S1+、S1-、S2+、S2-、S3+与S3-。在每一组差动信号焊垫(例如S1+与S1-)两侧,分别紧邻设置两个电源焊垫,换言之,在差动信号焊垫组的第一侧紧邻设置两个电源焊垫P1与P2,在差动信号焊垫组的第二侧紧邻设置两个电源焊垫P3与P4,使得每一组差动信号组被四个电源焊垫或电源焊线所包围。而信号焊垫与电源焊垫经由焊线,连接至在封装基板100上的相对应引脚50之上。而在半导体芯片11上的电源焊垫与信号焊垫是以两两相错的方式进行排列,如本发明的第一具体实施例。而在本发明的第二具体实施例的封装基板100上的引脚50,也是以两两相错的方式进行排列,使得连接焊垫与引脚的焊线,在相邻的两条焊线具有不同的长度。
请参阅图2B,此图显示图2A的AA’线的剖面示意图,一组差动信号焊线(如S1+与S1-)被四条电源焊线(P1、P2、P3、P4)以上下立体的方式所包围,使得差动信号焊线组不只在直线方面被包围,同时也在上下方向被电源焊线所包围。这样的焊线配置方法,将更有效的保护信号焊线的信号传递,减少差动信号焊线组之间的信号干扰与电感耦合效应,尤其对于高频电子组件的信号传递有更好的屏壁效果。
综合上述,本发明提出一种半导体芯片封装体的焊线配置结构,利用电源焊线包围差动信号焊线组或者是一般信号焊线,而使得信号焊线能受到更完整的屏蔽保护。同时,本发明还可使得封装体内的焊线回路具有较低的回路电感以及较佳的匹配阻抗。
以上所述仅为本发明的较佳实施例,当不能以此限制本发明的范围。即凡依本发明权利要求所作的均等变化及修饰,都应视为本发明的进一步实施形式。
Claims (10)
1.一种芯片封装体的焊线排列结构,其中包含:
至少一信号焊线,由一芯片连接至一封装基板上;以及
至少两电源焊线,分别排列在该信号焊线的两侧,而且由该芯片连接至该封装基板。
2.如权利要求1所述的芯片封装体的焊线排列结构,其中该信号焊线由该芯片上的焊垫连接至该封装基板上的引脚。
3.如权利要求1所述的芯片封装体的焊线排列结构,其中该电源焊线由该芯片上的焊垫连接至该封装基板上的引脚。
4.如权利要求1所述的芯片封装体的焊线排列结构,其中在该芯片上,耦接该至少两电源焊线的两焊垫分别紧邻于耦接该信号焊线的焊垫的两侧。
5.如权利要求1所述的芯片封装体的焊线排列结构,其中该封装体上用来耦接电源焊线的电源环位于该芯片与该封装基板的引脚之间。
6.如权利要求1所述的芯片封装体的焊线排列结构,其中该信号焊线为一组具有差动信号的差动信号焊线。
7.如权利要求1所述的芯片封装体的焊线排列结构,其中该信号焊线的第一侧被第一电源焊线与第二电源焊线所包围,而该信号焊线的第二侧被第三电源焊线与第四电源焊线所包围。
8.如权利要求7所述的芯片封装体的焊线排列结构,其中该第一电源焊线、该第二电源焊线、该第三电源焊线与该第四电源焊线是从该芯片连接至该封装基板的一第一引脚、一第二引脚,一第三引脚与一第四引脚,而该第一引脚与该第二引脚为交错排列,该第二引脚与该第三引脚为交错排列,该第三引脚与该第四引脚为交错排列。
9.如权利要求7所述的芯片封装体的焊线排列结构,其中该信号焊线为一组具有差动信号的差动信号焊线。
10.如权利要求9所述的芯片封装体的焊线排列结构,其中该第一电源焊线、该第二电源焊线、该第三电源焊线与该第四电源焊线是从该芯片的一第一焊垫、一第二焊垫、一第三焊线与一第四焊线连接至该封装基板,而该第一焊垫与该第二焊垫为交错排列,该第三焊垫与该第四焊线为交错排列。
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