CN1368760A - 半导体设备 - Google Patents
半导体设备 Download PDFInfo
- Publication number
- CN1368760A CN1368760A CN01135776A CN01135776A CN1368760A CN 1368760 A CN1368760 A CN 1368760A CN 01135776 A CN01135776 A CN 01135776A CN 01135776 A CN01135776 A CN 01135776A CN 1368760 A CN1368760 A CN 1368760A
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- China
- Prior art keywords
- semiconductor chip
- semiconductor
- pressure pad
- stacking
- pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
在一种半导体设备中,堆放的半导体芯片由具有其上被安排垫片的主表面和背表面的半导体芯片构成,将上部半导体芯片的后表面固定到下部半导体芯片的主表面上,象阶梯似地移动并且不覆盖垫片,堆放的半导体芯片的后表面被固定到提供压料垫散热器的引导框架中压料垫的一个表面。在堆放的半导体芯片上的垫片和相应的内部引线被用反向金属线搭接通过金属线连接,内部引线,堆放的半导体芯片,金属线,接合材料,和压料垫的五个主要的表面被用密封材料覆盖,从密封材料的外部表面露出压料垫的后表面。
Description
发明背景
1.发明领域
本发明涉及减小通过堆放半导体芯片构成的半导体设备的焊封厚度。
2.技术背景描述
在现有技术中,对于闪烁存储器卡,例如用作照相机CamCorder,等的存储媒体的小型闪烁卡,采用TSOP(Thin Small OutlinePackage),它允许在卡中有相当大的空间,其标准类型的封装厚度尺寸最大是1.2mm。近来为了减小卡中的空间开发出了较小的闪烁卡,要求封装的厚度应该减小到大约标准TSOP的一半。也有增加容量的强烈要求。除了可通过单个半导体芯片获得较大的容量外,开发出了称为MCP(Multi Chip Package)的半导体设备,在其中将两个半导体芯片用密封剂焊封。
图11是在现有技术中的MCP剖面图,例如,被公开在专利申请出版物(KOHYO)Hei 10-506226中,通过将两个半导体芯片粘贴到压料垫的两个表面而构成,将该压料垫设在一片引导框架上,使这样的两个半导体芯片安装在上面。
将半导体芯片3通过接合材料2接合到该压料垫1的第一表面(示于图11中的该压料垫1的上边),将半导体芯片5通过接合材料4接合到该压料垫1的第二表面(示于图11中的该压料垫1的下边)。因此,在图11中,这样构成堆放的半导体芯片(该半导体芯片有两个有效表面),使得有效表面3a和有效表面5a分别将压料垫1和接合材料2,4放在顶部表面和底部表面之间。
金丝6的一端被连到垫片(未示出),通过球形搭接6c提供给有效表面3a和5a。金丝6的其他端被连到内部引线7的一个面7a和内部引线7的另一面7b,以便移动针形搭接6d的位置。在现有技术中通常实施金属线搭接方法,其中球形搭接6c被加到半导体芯片3,5上所提供的垫片上,针形搭接6d被加到内部引线7上,将此称为前向金属线搭接方法。
在图11中,金丝6的最高部分6a,6b被涂以尺寸为E的焊接树脂8以便密封和保护。从图11中所示的有效表面3a向上延伸的金丝的最高部分6b的高度尺寸A的和E+A+B+A+E,堆放的半导体芯片的厚度B(半导体芯片3,5,接合材料2,4和压料垫1之和),从有效表面5a向下延伸的金丝的最高部分6b的高度尺寸A,和涂抹金丝6的最高部分的尺寸E给出了MCP的总厚度尺寸。
在以上现有技术所描述的半导体设备中,存在缺陷,因为堆放的半导体芯片的厚度B由半导体芯片3,5,接合材料2,4和压料垫1之和给出,故该压料垫1的厚度增加了该两个表面的半导体芯片的厚度。
在该前向金属线搭接方法中,也有缺陷,因为在球形搭接6c的位置和金丝的最高部分6a或6b之间的尺寸A和从球形搭接6c的位置到金丝的最高部分6a的尺寸C的和D=A+C给出从针形搭接位置到金丝的最高部分的高度尺寸,这样的尺寸A与以上的高度尺寸交迭,因此金丝被这样的尺寸延伸得更长。
另外,如果将前向金属线搭接应用到中心垫片方案的半导体芯片上,其中将这些垫片安排在该半导体芯片的有效表面的中心,这有缺陷,因为金丝与堆放的半导体芯片的外部外围接触,不可能将金属线搭接应用到这样的半导体芯片。
如果该半导体设备的厚度必须通过现有技术的结构减少到0.5mm,则有问题,对于两片接合材料的厚度为2×0.025mm,金属线环的高度A=0.15mm到0.18mm,和引导框架板的厚度0.125mm,则除非该堆放的半导体芯片的厚度可被减少到小于0.025mm,金属线6就会从密封树脂8的外部表面露出。
如果半导体芯片的厚度被减少到小于0.1mm,引起了要新克服的各种问题,例如,晶片的抛光变得困难的问题,当晶片在抛光以后被运送时产生故障的问题,当把晶光分成单独的芯片时出现故障的问题,当将分开的半导体芯片组装时出现故障的问题,等。因此,存在着在现有技术中大批生产设备不可能处理这些问题的问题。
而且,如果半导体设备的厚度是薄的,例如0.5mm,外部引线的高度被降低,例如0.25mm,当将板的厚度是0.125mm的外部引线从半导体设备的中心侧表面抽出时,其高度几乎是半导体设备的厚度0.5mm的一半,如专利申请出版物(KOHYO)Hei 10-506226中所述。因此,在此引起了问题,因为不可能充分地吸收在半导体设备被封装在封装基片上以后,由于环境温度的变化引起的热应变,焊接接合部分的可靠性容限被降低。
发明概述
因此,通过克服以上提到的现有技术中的缺陷,本发明提供一种半导体设备,其厚度是现有技术中半导体设备标准化厚度的一半。
本发明的一个目的是提供一种半导体设备,通过如阶梯似地堆放来构成堆放的半导体芯片,能够缩短金属线的无用的和多余的传送路线并降低密封厚度,且金属线的环路高度并不增加半导体设备的厚度。
为了达到以上的目的,依据本发明,在此提供一种半导体设备,由半导体芯片组成的堆放半导体芯片分别具有一个被安排垫片在其外围上的主表面和一个与主表面相对的背表面,用接合材料将位于上边的另一个半导体芯片的背表面固定在位于下边的一个半导体芯片的主表面上,象阶梯那样并不覆盖垫片,采用一个引导框架,在其中连续地形成内部引线和外部引线,并构成一个压料垫,由此连续地构成具有一个压料垫散热器的悬挂引线的压料垫。将该堆放的半导体芯片的后表面通过接合材料固定到压料垫的一个表面。将在该堆放的半导体芯片上的垫片和相应的内部引线经过金属线由反向的金属线搭接进行连接,然后将内部引线的五个主要表面,该堆放的半导体芯片,金属线,接合材料,和压料垫用密封材料覆盖,从密封树脂的外部表面露出该压料垫的后表面。
依据本发明,通过上部半导体芯片在相同的平面内旋转180度并像阶梯似地移动以后堆放上部的半导体芯片从而构成该堆放的半导体芯片,然后固定它而并不覆盖提供在下部半导体芯片上的垫片。
另外,该堆放的半导体芯片由两个不同的半导体芯片组成,使得在下部半导体芯片的主表面上所提供的垫片从上部半导体芯片的外部外围区域露出来。
进一步,将该堆放的半导体芯片的后表面通过接合材料固定在该压料垫的变薄部分。
而且,提供水平差的内部引线的顶端部分和提供在堆放的半导体芯片的水平差部分上的相应的垫片由反向金属线搭接连接。
将该金属线的一端通过球形搭接连到位于该堆放的半导体芯片的堆放厚度范围内的内部引线的一个表面,将该金属线的另一端通过针形搭接连到提供给该堆放的半导体芯片的上部半导体芯片的主表面的垫片上。
附图简述
图1是作为实施方案1的一种半导体设备的剖面图;
图2是作为实施方案1的半导体设备的一种剖面图,与图1正交地横断;
图3是省略密封树脂时,示出作为实施方案1的半导体设备的平面图;
图4是金属线的侧视图;
图5是示出作为实施方案1的半导体设备的另一种实施方案的剖面图;
图6是作为实施方案2的一种半导体设备的剖面图;
图7是省略密封树脂时,示出作为实施方案2的半导体设备的平面图;
图8是示出作为实施方案2的半导体设备的另一种实施方案的剖面图;
图9是作为实施方案3的一种半导体设备的剖面图;
图10是示出作为实施方案3的半导体设备的另一种实施方案的剖面图;
图11是用现有技术的一种半导体设备的剖面图。
最佳实施方案详述
在此往后将参考附图解释实施方案。在这种情况下,在用作说明本发明的实施方案的各个附图中,通过对具有相同功能的部分标上相同的符号将省略它们的多余的解释。
实施方案1
将参考所构成的一个半导体设备解释实施方案1,该半导体设备具有的密封厚度基本上是TSOP(Thin Small Outline Package)半导体设备的一半,在其中两个相同的半导体芯片被用密封树脂密封得到的密封厚度为1mm,并在两个方向中抽出外部引线。
图1是作为实施方案1的一个半导体设备的剖面图。图2是作为实施方案1的半导体设备的一个剖面图,与图1正交。图3是省略密封树脂时,示出作为实施方案1的半导体设备的平面图。图4是金属线的侧视图。
图1中所示的第一半导体芯片13的后表面13b通过接合材料12固定在压料垫11的第一表面11a上。第二半导体芯片15的后表面15b通过接合材料14固定,像阶梯似地,堆放在第一半导体芯片13的有效表面(主表面)13a上,以便构成堆放的半导体芯片。当如图3中所示,第二半导体芯片被堆放在第一半导体芯片13上时,使第二半导体芯片15被通过如阶梯似的移动L3固定,这样,被提供到第一半导体芯片13的主表面13a上的垫片并不与第二半导体芯片15重迭。在图3中,相互具有相同尺寸和相同功能并且其中垫片被沿着外部外围一侧安排的两个半导体芯片13被按相同方向堆放,然后第二半导体芯片15在相同平面中相对于第一半导体芯片13旋转180度,然后在长边方向移动L3。
提供给图3中所示的半导体芯片13和15的垫片10和20与内部引线17的第一表面17a通过图4中所示的金属线16被相应地电气上连接,借助于前向金属线搭接方法和反向金属线搭接方法将球形搭接16c应用到内部引线17的一端,将针形搭接16d应用到金属线16的另一端。
在该实施方案1中,图4所示的金属线16被用所谓的反向金属线搭接方法连接,也就是,球形搭接16c被应用到安排在由图1中L4所指明的堆放的半导体芯片侧表面区域中的内部引线17(描绘在图1的右侧)的第一表面17a,然后金属线16被弯曲,在从直线部分16e所连接的点垂直上升的位置上(环形高度A的部分)基本正交,然后水平方向延伸尺寸L5,接着针形搭接16d被应用到提供给第二半导体芯片15的主表面15a的垫片20(图3中所示)。
作为对照,金属线16被用所谓的前向金属线搭接方法连接,也就是球形搭接16c被应用到堆放的半导体芯片的下部半导体芯片13上的垫片10,然后将金属线16弯曲,在从上升的直线部分16e所连接的点垂直上升的位置上(环形高度AA部分)基本正交,然后水平延伸,接着针形搭接16d被加到在图1中左侧所示的内部引线17的第一表面17a上。
依据反向金属线搭接方法,从第二半导体芯片15的主表面15a到金属线16的最高部分的尺寸D可以减少到几乎达到金属线的直径。作为对照,依据前向金属线搭接方法,被应用到将第一半导体芯片13上的垫片和内部引线17的第一表面17a连接,从第二半导体芯片15的有效表面15a向上突出的量可被减少,因为这样的方法是在第二半导体芯片15和接合材料14的和L4的范围内实施的。
如图1,2和3中所示,由内部引线17,第一和第二半导体芯片13,15,金属线16,接合材料12,14和压料垫11组成的所有主要的五个表面(其中压料垫11的第一表面11a和除第二表面11b以外的四个在平面厚度方向中的侧表面被称为主要的五个表面)被用密封树脂18覆盖,使得外部引线19和用于支撑压料垫11的悬挂引线11d的四个压料垫被从密封边界侧的表面突出。同时,压料垫11的一个表面(图1中所示的后表面11b)被从密封树脂18的外部表面露出来。
在密封以后,通过切去在引导框架上连续组成的它们的系杆部分(未示出)和它们的顶部构成如鸥翼似的外部引线19。然后,在引导框架(未示出)上连续组成的悬挂引线11d的压料垫被在密封树脂18的外部外围侧表面的边界部分上切除(在图2中密封树脂18的边界部分上所示的四个位置11e),从而可以完成在图1中所示的依据实施方案1的半导体设备。
接着,以下将解释一种制造方法。引导框架被准备好,在其中在图3中所示的两相对的边被分别用一对悬挂引线11d握持,内部引线17和外部引线19也在两个相对的外部外围侧上调成一致,与压料垫11和压料垫悬挂引线11d所在的边正交,利用隔离间隙相继组成。
这种引导框架可以与在TSOP半导体设备中所采用压料垫散热器(图2中L6所示)被施加在其上的引导框架具有相同的结构。关于提供给引导框架的矩阵结构,通过孔的传送和提供给引导框架的孔的定位,密封树脂溢出保护系杆,等的解释将被省略。首先,第一半导体芯片13的后部表面13b被接合材料12固定到压料垫11的第一表面11a。然后,通过用接合材料14将第二半导体芯片15粘贴到第一半导体芯片13上,同时将第二半导体芯片15象阶梯似地移动尺寸L3,如图3中所示,使得当芯片15被堆放到第一半导体芯片13时,在半导体芯片13上的垫片10并未被第二半导体芯片15覆盖,从而完成压料搭接的步骤。同时,可以完成堆放的半导体芯片。
然后,内部引线17的顶端和相应的垫片,如图4中所示,被利用在现有技术的金属线搭接中所采用的金丝,铜线,金属线(金属细线)16通过金属线搭接方法电气上连接。在前向金属线搭接和反向金属线搭接中,通过提供热能和化学能的搭接力和超声振动的融合/搭接方法的解释在此将被略去。
作为分级支撑的夹具和引线固定支架,采用现有技术中批量生产时所用的型架。分级支撑的夹具具有第一支撑表面,用于支撑内部引线17的第二表面17b,和为支撑压料垫11在第一支撑表面中所提供的第二被压印的凹形平面。引线固定支架支撑内部引线17的第二表面17b和悬挂引线11d的压料垫,和在内部引线17的第一表面17a的顶部部分上有通孔,围绕球形搭接或针形搭接所应用的区域。
内部引线17的第二表面17b被放在支撑支架的第一支撑表面上,然后压料垫11的后表面11b被放在第二被压印的凹形平面上,接着内部引线17和悬挂引线11d的压料垫被支撑夹具和引线固定支架夹在中间并被夹紧,同时将引线固定支架放在内部引线17的第一表面17a上。
在此之后,金属线16被用反向金属线搭接方法电气连接,也就是,如图1中所示,金属线16的一端被通过在引线固定支架的通孔的入口区域中球形搭接16c连接到内部引线17的第一表面17a,然后,上升的直线部分16e被与堆放的半导体芯片的侧表面平行抬起,针形搭接16d被应用到相应的垫片20上。
然后,金属线16被通过前向金属线搭接方法电气连接,也就是,球形搭接16c被应用到第一半导体芯片13的主表面13a的垫片上,然后,直线部分16e被与第二半导体芯片15的侧表面平行抬起(环形高度AA),接着针形搭接16d被应用到内部引线17的第一表面17a的顶端部分。这样,可以完成金属线搭接步骤。
然后,内部引线17的第二表面17b和压料垫11的后表面11b被与下部的模子接触,上部模子被放在内部引线17的第一表面17a上,然后上部模子和下部模子被夹紧,接着密封树脂18,例如,热成形的树脂,等,在高温下被融化,在高压下,被注入在上部模子和下部模子之间所提供的凹部。这样,由堆放的半导体芯片组成的五个主要表面,金丝16,和压料垫11被密封,从而可以完成密封步骤。在实施方案1中所采用的密封树脂18,并未被特别规定是否这样的材料是为半导体设备开发的。因为在密封步骤(融合步骤)中所采用的上部模子和下部模子并没有被从在现有技术的半导体设备制造步骤中所采用的加以改变,它们的解释将被省略。
如果采用其中有多个压料垫象一个单列的或多列的矩阵组成的引导框架,则多个半导体设备可通过外部引线19的顶端部分和悬挂引线11d的压料垫在引导框架部分(未示出)相继地被构成,然后多个半导体设备在后继的阶段中被分成单独的半导体设备,在划分的步骤中,外部引线19的顶端部分被通过切割装置,例如激光处理,机械加工,等与引导框架分离。
在用于成型被切割装置断开的象鸥翼似的外部引线的顶端部分的引线成型步骤被完成的阶段,压料垫悬挂引线11d被在引导框架部分上连续地构成。因此,在必要的组装步骤,例如打标记和其他等被执行以后,多个半导体设备最好通过从引导框架最终切除压料垫悬挂引线11d被分成小片,在图2中的密封树脂侧表面的边界上按压料垫悬挂引线11d的剖面形状11e进行。这样,可以获得依据在图1到图3中所示的实施方案1的堆放的半导体设备。例1
将参考图5解释厚度为0.55mm的半导体设备。引导框架被准备好,其中内部引线17,压料垫11,压料垫悬挂引线,系杆,框架,分段带,等被类似于在TSOP封装中所采用的引导框架来构成并具有0.125mm的厚度。
压料垫11的平面部分11c被构成得比压料悬挂引线11d和内部引线17薄,通过将0.125mm的厚度减少0.075mm,使压料垫11的平面部分11c的厚度成为0.050±0.02mm。压料垫11的后表面11b也在压料垫悬挂引线11d部分被弯曲,如图2所示,给出对于内部引线17的后表面的水平差为L6=0.1mm(在此以后称为“压料垫散热器”)。
作为半导体芯片,准备两个半导体存储器芯片13,15,其中垫片10被安排成沿着靠近有效表面的外部外围的一侧,具有厚度为145±10μm,并具有相同的尺寸和相同的功能。下部的半导体存储器芯片13被通过具有厚度为25μm的带状接合材料12固定到压料垫11的平面部分11c,然后上部半导体存储器芯片15(在例1的情况下,该芯片与半导体存储器芯片13是相同的)被通过具有厚度为25μm的接合材料14固定到下部半导体存储器芯片13的有效表面13a。
在此时,上部半导体存储器芯片15被通过将上部半导体存储器芯片15相对于下部半导体存储器芯片13旋转180度并将上部半导体存储器芯片15在长边方向象阶梯似地移L3=1.0mm,固定在下部半导体存储器芯片13上,使得上部半导体存储器芯片15并不覆盖在下部半导体存储器芯片13上的垫片10,从而可获得堆放的存储器芯片,其中图3所示的垫片10和20被安排在两个相对的左和右侧。
因为在上部半导体存储器芯片15上的垫片20被定位在高出内部引线17的相应的第一表面17a L8=0.170mm,金丝16被通过反向金属线搭接在环形高度A=0.22mm处连到垫片20。如果这么做了,金丝16的最高部分(环形高度A)从上部半导体存储器芯片15的有效表面15a向上突出的尺寸可被设置到0.05mm。
作为对照,下部垫片10被定位在低于上部垫片20,低过上部半导体存储器芯片15本身的厚度和接合材料14的厚度之和,也就是0.01725±0.012mm,金属线16被通过前向金属线搭接连到垫片10,得到环形高度AA=0.18±0.03mm。
依据以上的结构,从堆放的半导体存储器芯片的上部主表面到压料垫11的后表面11b的尺寸成为0.395±0.044mm。在上部模子和下部模子之间的密封树脂注入空间(空腔)被设置到0.550mm,使得半导体设备的厚度成为0.550±0.025mm。然后,密封树脂18被注入空腔,同时使压料垫11的后表面11b与下部模子的底部表面接触,将堆放的半导体存储器芯片密封。
然后,在划分步骤和外部引线形成步骤完成以后,制成TSOP堆放的半导体芯片的非常薄的半导体设备可以得到。在这样的半导体设备中,如图5中所示,从密封树脂18的表面到压料垫11露出的后表面的厚度尺寸是0.550±0.025mm,从外部引线19到压料垫露出的表面的密封树脂18的尺寸L7是0.1mm,从密封树脂18的表面到外部引线19(图5中外部引线19的上表面)的尺寸L6是0.325mm,外部引线19被从偏离半导体设备的密封树脂18的侧表面中心的位置突出0.1125mm,L1大于0.325mm。
在例1中,用于覆盖堆放的半导体存储器芯片的上部主表面的密封树脂18的厚度尺寸是0.15mm(0.555-0.395=0.150)。从上部有效表面到压料垫11的后表面11b的尺寸是0.395mm。如果考虑大批生产中的生产误差±0.044mm,上部有效表面可以用密封树脂18覆盖至少0.111mm(0.150-0.044=0.111mm)。从针形搭接位置(压料垫11的第一表面11a)的金丝最高位置通过反向金属线搭接用密封树脂18可以覆盖0.1mm,如果考虑生产误差±0.044mm,它们可被用密封树脂18覆盖至少0.056mm。这样,可以保证足够的密封质量。
而且,在前向金属线搭接中的环形高度尺寸AA是0.180mm。金丝的最高部分可以用密封树脂18覆盖0.145mm,如果考虑生产误差±0.044mm,它们可被用密封树脂18覆盖至少0.056mm。因而,可以保证足够的密封质量。
依据以上的解释,因为压料垫11被从封装的外部表面露出,从压料垫11的平面部分11c到密封树脂18的最上部表面的尺寸L2可以设置得大,具有厚度为0.55mm的半导体设备可由两个半导体芯片组成,每个具有芯片厚度为0.1475±0.010mm,除非半导体芯片13,15的厚度被减至小于0.100mm,这是难以加工的。如果采用每个具有芯片厚度为0.147±0.010mm的半导体芯片,可通过现有的设备大批生产堆放的半导体设备而不改变生产过程的条件,因而不需要新设备投资。
而且,因为通过组成压料垫散热器提供的离内部引线安放表面的水平差为L6=0.100mm,如果用密封树脂实行密封露出压料垫,弯曲的悬挂引线和内部引线17被用密封树脂覆盖,悬挂引线和外部引线被安排在偏离密封树脂侧表面中心0.1125mm(在图5中它们被向下偏移0.1125mm)。当外部引线19被在与压料垫11的露出的后部表面11b相反的方向中弯曲时,外部引线19的顶端被成型如鸥翼,外部引线19的封装高度L1可被延长超过0.1125mm,而不是外部引线19从密封树脂18的侧表面中心突出的情况。
因为外部引线19的封装高度L1存在着L1的体积对于外部引线19的刚度对热形变的影响,取决于偏置的存在,刚度被改变3.6倍。即使依据例1的半导体设备在它被焊剂固定到封装基片以后经受到热应力,封装可靠性可得到改善,因为在焊剂接合部分中产生的热应变可被外部引线19的L1部分的形变吸收。
另外,通过堆放相同的半导体存储器芯片构成堆放的半导体存储器芯片将半导体存储器的容量增加两倍是可能的。
此外,反向金属线搭接方法可以降低从堆放的半导体存储器芯片的最上部的表面到金丝的最高部分的高度D,并且也将误差总数压得少些。因而,如金丝从密封树脂18的表面露出的故障可被减少,并且从堆放的半导体存储器芯片的有效表面到密封表面的树脂厚度尺寸也可被减小。结果,半导体芯片的厚度可被减小得更多。例2
以下将参考图1和图2解释例2,其中将现有技术的TSOP中厚度为1mm的密封树脂应用到具有厚度为0.625mm的半导体设备上。
在例2的堆放的半导体设备中,采用引导框架,其中压料垫11和压料垫悬挂引线11e被连续地构成,并组成内部引线17提供0.1mm的压料垫散热,如图2中所示,且外部引线19,两者均具有平面厚度为0.125mm,被连续地构成。两个半导体存储器芯片,每个具有厚度为0.147mm,被堆放在图1中所示的压料垫11的第一表面上,然后如阶梯似地由0.025mm的接合材料固定,然后在堆放的半导体芯片上的垫片和相应的内部引线17被金属线搭接,然后通过利用上部模子和下部模子应用树脂密封,上下模子被制成具有空腔尺寸为0.625mm。因此,可获得这样的半导体设备,其中L4为0.345mm,用于覆盖堆放的半导体芯片的主表面的树脂密封尺寸为0.1555mm,L2是0.500mm,如图1中所示,作为L2和压料垫厚度0.125mm之和的总厚度为0.625mm。
参考例1和例2解释依据实施方案1的堆放的半导体设备。在这种设备中,外部引线17可被通过压料垫散热器埋藏在密封树脂18中,因为采用具有压料垫散热器的引导框架,通过将两个相同的半导体存储器芯片堆放,同时将一个芯片13的主表面和另一芯片15的后表面象阶梯似地推移,堆放的半导体芯片的后表面被固定到压料垫11的一个表面,金属线16被分别通过反向金属线搭接方法和正向金属线搭接方法连接到堆放的半导体芯片上的上部垫片20和下部垫片10,密封被实施,从密封树脂18的外部表面露出压料垫11的后表面11b。但以下所描述的应用可被采用。
在实施方案1中,解释了通过将上部半导体芯片15相对于下部半导体芯片13旋转180度,然后将上部半导体芯片15在一侧方向象阶梯似地移动构成的堆放的半导体芯片。作为对照,当采用垫片被安排成沿着半导体芯片主表面的两个正交外部外围侧的半导体芯片时,堆放的半导体芯片可通过将上部半导体芯片在相同平面上相对于下部半导体芯片旋转180度,然后将上部半导体芯片分别在两个正交方向象阶梯似地移动并不覆盖在半导体芯片上形成的垫片而被构成。这样堆放的半导体芯片可被应用到非常薄的半导体设备,其厚度是TQFP(薄四边形平面封装)半导体设备厚度1.4mm的一半,在其中外部引线被从密封树脂的四个外部侧表面伸出。
在例1中,解释该非常薄的堆放的半导体设备,其中通过采用具有深度为0.1mm的压料垫散热器的0.125mm厚度的引导框架和将堆放的半导体芯片安装表面压印0.075mm以将压料垫的厚度减少到0.05mm,可以实现0.55mm的密封树脂厚度。作为对照,如果0.1mm厚度的引导框架被采用,压印深度被设置为0.045mm,可以构成完全与例1类似的具有厚度为0.55mm的非常薄的半导体设备。
在例2中,解释0.625mm厚度的非常薄的半导体设备,其中使成本增加的压料垫表面加工被省略,具有在压料垫后表面和内部引线后表面之间的水平差0.1mm的0.125mm厚度的引导框架被采用,当厚度小于1mm的TSOP时,对于要求减少密封树脂的厚度到0.55mm来说,成本具有优先权的情况下进行以上考虑。作为对照,如果0.1mm厚度的引导框架被采用,可以构成具有0.6mm厚度的非常薄的半导体设备而不改变模子。
实施方案2
以下在这实施方案2中将解释一种通过利用堆放的半导体芯片构成非常薄的半导体设备的方法,其中当利用两个相同的半导体存储器芯片组成这样的堆放的半导体芯片时,上部半导体存储器芯片直接与下部半导体存储器芯片平行地推移如同阶梯,然后被固定。
图6是作为实施方案2的一种半导体设备的剖面图。图7是当略去图6中密封树脂时,示出作为实施方案2的半导体设备的平面图。图8是示出作为实施方案2的半导体设备的另一种实施方案的剖面图。在这种情况下,与在实施方案1中所解释的相同的制造过程的重迭部分的多余解释以下将被略去。
如图6中所示,通过对在实施方案1所用的引导框架内部引线17的顶端部分的腐蚀或挤压加工构成水平差,提供对内部引线17的顶端部分的薄的平面17c。与实施方案1中所采用的引导框架的配置相同的在实施方案2中所采用的引导框架的配置的解释在此将被省略。
图6中所示的第一半导体芯片13的后表面13b被通过接合材料12固定到压料垫11的平面部分11c。第二半导体芯片15的后表面15b(具有与第一半导体芯片的后表面相同的尺寸和相同的功能)被通过接合材料14固定到第一半导体芯片13的主表面13a,就这样构成堆放的半导体芯片。在此时,通过将上部半导体芯片15与下部半导体芯片13平行地从图7中所示的状态移动L3,被如阶梯似地固定,两个芯片被堆放使它们的垫片放在相同的一侧(在图6中在左边的一侧上),并不覆盖由上部台阶上构成的第二半导体芯片15在下面台阶上构成的第一半导体芯片13上所提供的垫片10。
然后,在第一和第二半导体芯片13,15上所提供的垫片10,20分别被通过反向金属线搭接经金属线16连到内部引线17的薄平面17c和内部引线17的第一表面17a。在图7中的左侧所示的内部引线17被通过球形搭接连接,在图7中的右侧所示的内部引线17是并不连接的无效引线。
金属线搭接被实施两次。在第一金属线搭接中,金属线16被通过球形搭接连到如图6中下顶部所示的内部引线17的薄平面17c,也通过针形搭接连到环形高度AA上的下部垫片10。当反向金属线搭接被应用到在堆放的半导体芯片的下部半导体芯片13上的所有必要的垫片10时,第一金属线搭接被完成。
然后,在第二金属线搭接中,球形搭接被应用到内部引线17的第一表面17a,在此时,球形搭接被应用到这样的位置上,从在第一金属线搭接中球形搭接16c被应用的位置向密封树脂18的外部侧表面移动。金属丝16被从搭接点在环形高度A上基本正交地弯曲,然后平行地延伸到上部垫片20,并通过针形搭接16d连接到垫片20,当反向金属线搭接被应用到所有必要的上部垫片20时,第二金属线搭接被完全成。
当金属线搭接被完成时,通过利用密封树脂18将由内部引线17,第一和第二半导体芯片13,15,金属线16,接合材料12,14和除后表面11b以外的压料垫11组成的所有主要的五个表面覆盖完成密封,使得外部引线19被从密封树脂18的密封边界的侧表面伸出,压料垫11的后表面被从密封树脂18的外部表面露出。当外部引线19在它们的顶端部分被切除以后成型时,可以获得在图7中所示的依据实施方案2的非常薄的半导体设备。
在实施方案2中,被球形搭接到相同的内部引线17并移动它们的位置的金丝16的一端被通过针形搭接连到低部的垫片10和上部的垫片20。金丝16被延伸的连线部分在图7的平面图中相互交叉。然而,如果从侧面观看交叉部分,图6中所示的空隙可被保证。即使金丝在这些交叉部分相互接触,短路问题并不发生,因为在实施方案2的堆放的半导体芯片中金丝16相互在电气上具有相同的相位和相同的极性。例1
以下将参考例1中的图6和图7解释一个例子,其中将依据实施方案2的堆放的半导体设备被应用到0.55mm厚度的非常薄的半导体设备。0.125mm厚度的引导框架被预备,其中内部引线17,压料垫11,压料垫悬挂引线11d,系杆,框架,分段杆,和其他零件的构成与TSOP封装中所采用的引导框架类似。
通过压印,也就是腐蚀下部半导体芯片13被接合的区域,如图7中所示,其深度为0.075±0.025mm,在图6中所示的压料垫11的第一表面11a上构成平面部分11c。压料垫11的两个相对的边(长边)分别通过一对压料垫悬挂引线11d被固定到引导框架的框架部分(未示出)。
内部引线17和外部引线19,它们被调节到具有隔离的空隙,被在两个相对边(短边)的外部外围侧上连续地构成,与压料垫11和压料垫悬挂引线11d被提供的边正交,并用引导框架的框架部分(未示出)固定。
在压料垫11的第一表面11a和内部引线17的第一表面17a之间提供水平差,在图6中所示L7=0.1mm,这种水平差是通过将压料垫悬挂引线11d部分弯曲作为0.1mm的压料垫散热器构成的。
通过将它们除去深度为0.075mm,在引导框架的内部引线17的顶端部分上构成薄的平面17c。
厚度为0.1475mm的下部半导体存储器芯片13被通过0.025mm厚度的接合材料12固定到具有平面厚度为0.05mm的压料垫11的平面部分11c。然后,上部半导体芯片15的后表面15b被堆放,并通过厚度为0.025mm的接合材料固定到下部半导体存储器芯片13的有效表面13a。因而,在下部半导体芯片13上的垫片10和上部半导体芯片15上的垫片20被形成在堆放的半导体芯片的外部外围的一侧,同时平行移动L3如阶梯一般。
因为堆放的半导体芯片的上部垫片20高出内部引线17的第一表面17a L4=0.17mm,通过反向金属线搭接,在环形高度A=0.22mm的内部引线17的第一表面17a侧实施第二球形搭接。
作为对照,因为下部垫片10比内部引线17的薄的平面17c的位置高出0.0725mm,金属线16的环形高度尺寸A=0.18mm比上部半导体存储器芯片15的厚度0.1475mm和接合材料的厚度0.025mm之和0.1725mm高,第一金属线搭接也用反向金属线搭接实现。因此,如果从边上看,在平面图中,金属线搭接的金属线16相互交叉的延伸部分的点上可以保证空隙尺寸为0.085mm。
在图6中,因为从堆放的半导体芯片的上部主表面15a到压料垫11的后表面11b的尺寸是0.395mm,上部模子和下部模子被夹紧得到密封树脂注入空间(空腔)为0.550mm,使得半导体设备的厚度为0.550mm。压料垫11的后表面11b被与下部模子的底部表面接触,然后密封树脂18被注入,从而完成密封步骤。然后,当划分步骤和外部引线形成步骤被完成时,可以获得非常薄的半导体设备,在其中构成TSOP两层堆放的半导体芯片,从密封树脂18的前表面到压料垫11被露出的后表面具有厚度尺寸为0.550mm。
在例1中,因为用于覆盖堆放的半导体芯片的上部有效表面的密封树脂的厚度尺寸是0.155mm,从半导体芯片的有效表面到压料垫11的后表面11b的尺寸是0.395mm,考虑到在大批生产中的生产误差±0.044mm,堆放的半导体芯片的有效表面至少可用0.111mm厚度的密封树脂覆盖。而且,因为从主表面15a到金丝16的最高部分的尺寸是0.04mm,金丝16的最高部分至少可用0.071mm厚度的密封树脂覆盖,因此可保证足够的质量。
而且,因为被通过反向金属线搭接连到下部的半导体芯片的所有金丝是在堆放的半导体芯片的厚度尺寸范围内构成的,球形搭接的位置,针形搭接的位置,金丝的最高部分可用密封树脂18充分地覆盖。例2
以下将参考例2解释作为依据实施方案2的堆放的半导体设备,与现有技术中TSOP的密封树脂1.0mm厚度相对照,通过利用具有厚度为0.125mm的较廉价的引导框架构成具有厚度为0.625mm的半导体设备。
与实施方案重迭的解释在此将被略去。在例2的半导体设备中,在堆放的半导体芯片上阶梯式的垫片20,10和内部引线17的两个相应的顶端部分17a,17c被用反向金属线搭接在高度位置A=0.22mm和AA=0.15mm上连接,同时移动搭接位置,上部半导体芯片15的主表面15a被在厚度方向移动,因为施加到压料垫11的第一表面11a深度为0.075mm的压印加工被略去。与此相联系,在密封模子中的空腔尺寸被从0.075mm增加直到0.625mm。
以下将参考图8解释例2。如果每个具有厚度为0.147mm的两个半导体存储器芯片被用厚度为0.025mm的接合材料如阶梯式地堆放在0.125mm厚度的压料垫11上,可以获得这样的半导体设备,其中L4是0.345mm,从堆放的半导体芯片的主表面到密封树脂18的最外部表面的尺寸是0.155mm,L2是0.5mm,总厚度是0.625(=0.500+0.125)mm。
在金属线延伸部分的交叉点上,图8中所示的金属线16之间的空隙成为0.04mm(=0.22-0.15-0.03),因此可以保证足够的间隙。
实施方案3
在实施方案3中,以下将解释一种半导体设备,其中堆放的半导体芯片被通过堆放两个具有不同尺寸的半导体芯片构成水平差,使得上部的小半导体芯片被接合材料固定到下部大半导体芯片,没有覆盖在下部半导体芯片上的垫片,这个堆放的半导体芯片的后表面被固定到压料垫。
在实施方案3中,将解释一种构成半导体设备的方法,其中TQFP半导体设备的密封树脂的厚度被基本上减至一半,其中从四个侧表面伸出外部引线的密封树脂厚度被规格化为1.4mm。
图9是作为实施方案3的一种半导体设备的剖面图。图10是示出作为实施方案3的半导体设备另一种实施方案的剖面图。在这种情况下,相同制造过程中多余部分的解释在以下将被省略。
如图9所示,通过将引导框架的内部引线17的顶端部分腐蚀或挤压加工,作为在内部引线17的顶端部分上的薄平面17c构成水平差。如果半导体芯片被固定在其上的压料垫11的平面部分11c可被构成为薄的,在现有技术中的TQFP半导体设备所采用的引导框架可被用作压料垫11的第一表面11a。在这种情况下,在现有技术中提供给TQFP的关于系杆,框架,分段杆,应力吸收槽,传送孔等的解释被略去。
如图9中所示,第一半导体芯片13的后表面13b被接合材料12固定到压料垫11的平面部分11c。第二半导体芯片15的后表面15b被接合材料14固定到第一半导体芯片13的主表面13a,从而构成堆放的半导体芯片。在此时,如图8中所示,第一和第二半导体芯片13,15被如阶梯似地固定,使得小尺寸的半导体芯片被作为上部的第二半导体芯片15堆放,如图8中所示,并不覆盖提供给下部第一半导体芯片13的垫片10。
然后,提供在第一半导体芯片13上的垫片10和提供在第二半导体芯片15上的垫片20相应地和分别地用反向金属线搭接,经金属线16电气上连到内部引线17的薄平面17c和内部引线17的第一表面17a。
金属线搭接被分别实施两次。在第一金属线搭接中,作为下顶部构成的内部引线17的薄平面17c被利用反向球形搭接在环形高度AA上经金属线16连到堆放的半导体芯片中半导体芯片13的下部垫片10。当反向金属线搭接被应用到堆放的半导体芯片中下部半导体芯片13上的所有必要的垫片10时,第一金属线搭接被完成。
然后,在第二金属线搭接中,球形搭接被应用到内部引线17的第一表面17a。在此时,球形搭接被应用到从在第一金属线搭接中球形搭接16c所应用的位置向密封树脂18的外部表面移动的位置。金属线16被在从搭接点的环形高度A上基本正交地弯曲,然后平行地延伸到上部垫片20,并通过针形搭接16d连到垫片20。当反向金属线搭接被应用到所有必要的上部垫片20时,第二金属线搭接被完成。
当金属线搭接被完成时,通过将由内部引线17,第一和第二半导体芯片13,15,金属线16,接合材料12,14和除了后表面11b外的压料垫组成的所有主要的五个表面用密封树脂18覆盖完成密封,使得外部引线19被从密封树脂18的密封边界的侧表面伸出和压料垫11的后表面11b被从密封树脂18的外部表面露出。当外部引线19在它们的连到引导框架的顶端部分被切除以后成型时,可获得图8中所示的半导体设备。
在依据实施方案3的半导体设备中,如果提供在半导体芯片上的垫片数目与外部引线数目不同,金属线被球形搭接到一个内部引线顶端部分的两个不同的位置的情况和金属线被球形搭接到一个位置的情况是混合存在的。这些金属线被针形搭接到相应的下部垫片10和相应的上部垫片20。因为堆放的半导体芯片是通过将具有不同尺寸和功能的半导体芯片象阶梯似地堆放构成的,具有相同极性和相同相位的金丝不可能始终相互相交。因此,在金丝之间的空气隙,如图8的剖面图中所示,必须以三自由度方式提供,务必使金属线的部分相交。
如实施方案1和实施方案2那样,在依据实施方案3的半导体设备中,堆放的半导体芯片的厚度L4,压料垫的厚度,和从堆放的半导体芯片的最上部表面到密封树脂的外部表面的尺寸之和是堆放的半导体设备的厚度。例1
在例1中,将解释依据实施方案3的堆放的半导体设备被应用到厚度为0.55mm的半导体设备的一个例子,通过利用堆放的半导体芯片来实现,其中10mm平方的外围垫片方案半导体芯片和8mm平方的外围垫片方案半导体芯片被堆放,使各个半导体芯片的中心点一致。
具有平面厚度为0.125mm的引导框架被准备着,然后在图9中所示的压料垫11的第一表面11a区域的厚度通过腐蚀掉0.075mm被减少到0.05mm。压料垫11的四个角落部分被四个压料垫悬挂引线(未示出)固定到引导框架的框架部分。
内部引线17的顶端部分被调节并带着隔离间隙安排在压料垫11的外部外围侧,围绕着压料垫11。继续构成外部引线19和内部引线17并被固定到引导框架的框架部分。
通过将压料垫悬挂引线11d部分弯曲,构成压料垫散热器,在压料垫11的第一表面11a和内部引线17的第一表面17a之间提供水平差,L7=0.1mm。
通过将顶端部分腐蚀,从内部引线17的第一表面17a除去0.075mm的深度,在引导框架的内部引线17的顶端部分上形成薄平面17c。
0.1475mm厚度的下部和上部半导体存储器芯片13,15被用0.025mm厚度的接合材料12固定到压料垫11的平面部分11c,其中垫片10,20分别被安排在靠近主表面外部外围的一侧。当下部半导体存储器芯片13的主表面13a被用0.025mm厚度的接合材料14固定到上部半导体芯片15的后表面15b,使它们的中心点一致时,堆放的半导体芯片被固定,同时与下部半导体芯片平行地移动上部半导体芯片15 L3=1mm,如同阶梯,因为在上部半导体芯片15和下部半导体芯片13之间的一侧中的差是2mm。
堆放的半导体芯片的上部垫片20和位于比垫片20低L8=0.17mm的内部引线17的第一表面17a被用第二反向金属线搭接连在环形高度A=0.22mm处。
作为对照,因为下部垫片10比内部引线17的薄平面17c的位置高0.0475mm,通过在环形高度尺寸AA=0.15mm处用反向金属线搭接来实现第一金属线搭接。因为上部半导体芯片15的厚度0.1475mm和接合材料的厚度0.025mm之和是0.1725mm,可以保证在第一和第二搭接的金属线16之间的空隙为0.115mm。
在例1中,从堆放的半导体芯片的上部有效表面(主表面)到压料垫11的后表面11b的尺寸是0.395±0.044mm,作为L4=0.345±0.024mm和压料垫11的厚度0.05±0.02mm之和。因此,如果上部模子和下部模子被夹紧提供0.550mm的密封树脂注入空间(空腔),在压料垫11的后表面11b与下部模子的底部表面接触时,注入密封树脂18,可以获得这样的半导体设备,在其中构成TQFP两层堆放的半导体芯片,从密封树脂18的上部表面到压料垫11露出的后表面11b的厚度尺寸为0.550mm。
在以上例1中所解释的半导体设备中,用于覆盖堆放的半导体芯片上部主表面的密封树脂18的厚度尺寸是0.155mm(0.550-0.395=0.155)。因为从堆放的半导体芯片的有效表面到压料垫11的后表面11b的尺寸是0.395mm。堆放的半导体芯片的有效表面至少可用0.111mm厚度的密封树脂覆盖,考虑到大批生产中生产误差±0.044mm。
而且,因为从主表面15a到金丝16的最高部分的尺寸是0.05mm,金丝16的最高部分至少可用0.061mm厚度的密封树脂覆盖,因此可以保证足够的质量。
而且,因为用反向金属线搭接连到堆放的半导体芯片的下部半导体芯片13上的垫片的所有球形搭接位置,针形搭接位置,和用于金丝的金丝最高部分被在堆放的半导体芯片的厚度尺寸L4的范围内实现,这样的球形搭接位置,这样的针形搭接位置,和金丝的这样的最高部分可充分地被密封树脂18所覆盖。例2
以下将参考例2解释堆放的半导体设备,通过利用廉价的引导框架构成,具有的厚度基本上是现有技术中TQFT密封树脂的厚度1.4mm的一半,因为压料垫和内部引线顶端部分被构成为具有平面厚度为0.125mm。与例1中所解释的堆放的半导体芯片相同的配置和相同的制造过程的解释将被略去。
在例2中,下部半导体芯片13的后表面13b被用接合材料12固定到压料垫11的第一表面11a。因此,0.075mm的压印加工并不需要,内部引线的顶端部分并不除去0.075mm。因为这个原因,如果在第一反向金属线搭接中的球形搭接在环形高度AA=0.15mm处被应用到内部引线17的第一表面17a,在环形高度A=0.22mm处应用第二反向金属线搭接,当从侧面观看时,在交叉部分上的间隙尺寸成为0.04mm。
为了像例1那样保证间隙尺寸为0.115mm,在第二反向金属线搭接中的环形高度被设置为A=0.295mm。因此,在密封模子之间的空腔尺寸被增加到0.15mm以后,堆放的半导体设备被密封,这样可获得具有密封树脂的厚度为0.7mm的堆放的半导体设备。
在例2的堆放的半导体设备中,具有平面厚度为0.7mm的压料垫和内部引线被利用上部密封模子和下部密封模子密封,其中空腔尺寸被构成为0.7mm,0.147mm厚度的半导体芯片被用两个0.025mm厚度的接合材料象阶梯似地堆放和固定到压料垫。因此,L4=0.345mm,从堆放的半导体芯片的主表面15a到密封树脂最外部表面的尺寸是0.23mm,L2=0.575mm,堆放的半导体设备的总厚度是0.7(=0.575±0.125)mm。
如果堆放的半导体设备的后表面被固定到提供压料垫散热器的压料垫,然后金属线被通过反向金属线搭接方法搭接到堆放的半导体设备的上部垫片,则可以获得这样的半导体设备,其中压料垫被从密封树脂的外部表面露出来,外部引线被用压料垫散热器较深地埋入密封树脂,当堆放的半导体设备被用密封树脂密封时,同时使压料垫的后表面接触下部模子。
例2参考堆放的半导体芯片进行解释,其中具有密封树脂厚度为1.4mm的两个TQFP被堆放在具有平面厚度为0.125mm的引导框架上。然而,在密封树脂的厚度没有限制和要求添加功能或增加容量具有优先权的情况下,在现有技术中不可能获得的具有薄密封厚度的半导体设备可以得到,如果堆放的半导体芯片是通过将半导体芯片堆放到三层或多层构成的话。
本发明利用一片低价可得到的引导框架进行解释。但如果用于支撑堆放的半导体芯片的压料垫部分被用压料垫框架独立地构成,与内部引导框架分离,虽然成本变得贵些,或者如果引导框架用层状的基片代替,这样可造得比引导框架更薄,或者如果引导框架被用带状基片代替,可以实现相同的优点。
如果当堆放的半导体芯片被构成时需要接线的垫片未被覆盖,并且在主表面上的垫片也都有象阶梯似地可被露出的不同水平面,半导体芯片并不限于半导体存储器芯片。因此,类似的优点可通过或者具有任何功能的半导体芯片,或者具有不同尺寸和相同尺寸的半导体芯片来实现。
因为构成堆放的半导体芯片的上部半导体芯片上的垫片被从堆放的半导体芯片表面露出,半导体芯片并不限于外围垫装置的半导体存储器芯片。因此,通过或者是中心垫片装置的半导体芯片或者是垫片在主表面上被分开排列的半导体芯片来实现类似的优点。
如果,上部半导体芯片象阶梯似地移动并固定到下部半导体芯片,此后,上部半导体芯片在相同平面中相对于下部半导体芯片旋转180度,然后在两个正交方向中平行地移动,在构成堆放的半导体芯片中露出下部垫片,可以实现类似的优点。
如果上部半导体芯片象阶梯似地移动并固定到下部半导体芯片,此后,上部半导体芯片在两个正交方向中与下部半导体芯片平行地移动,在构成堆放的半导体芯片中露出两个正交边上的下部垫片,可以实现类似的优点。
如果尺寸小于其垫片被安排在外围上的下部半导体芯片的上部半导体芯片被象阶梯似地移动并固定到下部半导体芯片,露出下部垫片,在构成堆放的半导体芯片中不管上部垫片如何排列,甚至当上部和下部半导体芯片的中心点相互一致还是不一致时,可以实现类似的优点。
通过利用压料垫解释实施方案1,实施方案2,和实施方案3,其中具有压料垫散热器的压料垫在尺寸上大于半导体芯片。在这种情况下,采用小的压料垫可以实现类似的优点,在其中具有压料垫散热器的压料垫在尺寸上小于半导体芯片或者装框架的小压料垫,这种垫片具有象框架似地构成的压料垫悬挂引线加强条。
因为本发明是如以上所述的那样构成的,可以实现以下给出的优点。
在本发明中,因为压料垫的一个表面是从密封树脂的外部表面露出的并且构成压料垫散热器,外部引线可以伸出,偏离密封树脂侧表面的中心。因此,可以实现这些优点,即,半导体设备密封树脂的厚度可被减小,设备对于封装以后热应变的寿命可被延伸得更长。
在TSOP半导体设备中也可以实现这些优点,即,半导体设备的厚度可被减小,设备对于封装以后热应变的寿命可被延伸得更长。
另外,在TQFP半导体设备中可以实现这些优点,即,半导体设备的厚度可被减小,设备对于封装以后热应变的寿命也可被延伸得更长。
而且,可以实现这些优点,即,半导体设备的厚度可被减小得更多和设备对于封装以后热应变的寿命也被延伸得更长。
另外,可以实现这些优点,即,半导体设备的厚度可被进一步减少得更多和设备对于封装以后热应变的寿命也可被延伸得更长。
此外,可以实现这些优点,即,金属线的长度可通过使距离最短被构成基本上象L形和半导体设备的厚度可被减小。
Claims (6)
1.一种半导体设备包括:
一个堆放的半导体芯片,包括一个上部半导体芯片和一个下部半导体芯片,两者分别具有一个上面安排垫片的主表面和一个与主表面相对的后表面,通过接合材料将上部半导体芯片的后表面固定到下部半导体芯片的主表面,象阶梯似地移动并且不覆盖垫片;
内部引线,由此继续构成外部引线;
压料垫,由此继续构成压料垫悬挂引线,其中提供压料垫散热器;和
接合材料,金属线,和密封材料;
其中将堆放的半导体芯片的后表面用接合材料固定到压料垫的一个表面,然后在堆放的半导体芯片上的垫片和相应的内部引线被用反向金属线搭接经金属线连接,然后内部引线,堆放的半导体芯片,金属线,接合材料,和压料垫的五个主要表面被用密封材料覆盖,从密封树脂的外部表面露出压料垫的后表面,从密封树脂的侧表面伸出外部引线,和从密封树脂的侧表面露出压料垫的被切除的表面。
2.依据权利要求1的半导体设备,其中通过将上部半导体芯片在相同平面中旋转180度和象阶梯似地移动以后堆放上部半导体芯片,然后将它固定而并不覆盖提供在下部半导体芯片上的垫片,从而构成堆放的半导体芯片。
3.依据权利要求1的半导体设备,其中堆放的半导体芯片由两个分别具有不同尺寸的半导体芯片构成,使得在下部半导体芯片的主表面上所提供的垫片被从上部半导体芯片的外部外围区域露出。
4.依据权利要求1的半导体设备,其中堆放的半导体芯片的后表面被用接合材料固定到压料垫的变薄部分。
5.依据权利要求1的半导体设备,其中对作为薄平面部分的内部引线顶端部分提供水平差。
6.依据权利要求1的半导体设备,其中金属线的一端被用球形搭接连到位于堆放的半导体芯片的堆放厚度范围内的内部引线的一个表面,金属线的另一端被用针形搭接连到提供给堆放的半导体芯片的上部半导体芯片主表面的垫片。
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2001
- 2001-02-06 JP JP2001029342A patent/JP2002231882A/ja not_active Withdrawn
- 2001-06-11 US US09/877,038 patent/US6353265B1/en not_active Expired - Lifetime
- 2001-07-25 DE DE2001136283 patent/DE10136283A1/de not_active Ceased
- 2001-09-03 TW TW90121747A patent/TW499722B/zh not_active IP Right Cessation
- 2001-10-17 CN CNB011357762A patent/CN1197156C/zh not_active Expired - Fee Related
- 2001-10-17 KR KR10-2001-0063891A patent/KR100445502B1/ko not_active IP Right Cessation
Cited By (5)
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CN100390989C (zh) * | 2005-03-30 | 2008-05-28 | 丰田自动车株式会社 | 电路装置及其制造方法 |
CN100524739C (zh) * | 2005-05-06 | 2009-08-05 | 冲电气工业株式会社 | 半导体器件及其制造方法 |
CN101919002B (zh) * | 2007-12-20 | 2013-11-06 | 莫塞德技术公司 | 可堆叠存储器系统及其制造方法 |
CN108155158A (zh) * | 2017-12-22 | 2018-06-12 | 中国电子科技集团公司第四十七研究所 | 大容量存储器电路的3d封装结构 |
CN113451231A (zh) * | 2020-03-27 | 2021-09-28 | 意法半导体有限公司 | 具有透明基底的wlcsp及其制造方法 |
Also Published As
Publication number | Publication date |
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JP2002231882A (ja) | 2002-08-16 |
KR100445502B1 (ko) | 2004-08-21 |
KR20020065326A (ko) | 2002-08-13 |
US6353265B1 (en) | 2002-03-05 |
TW499722B (en) | 2002-08-21 |
CN1197156C (zh) | 2005-04-13 |
DE10136283A1 (de) | 2002-08-22 |
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