CN102069057A - 用于多种胶粘剂的传送装置 - Google Patents
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Abstract
本发明公开了一种用于从胶粘剂供应处传送多种容纳于各个容器中的胶粘剂到衬底的方法和装置,首先将第一戳印销移动至第一容器的位置,该第一容器容纳有第一胶粘剂;使用第一戳印销从第一容器处传送第一胶粘剂到衬底,其后将第一晶粒键合到第一胶粘剂上;然后将第二戳印销移动到第二容器的位置,该第二容器容纳有第二胶粘剂;使用第二戳印销从第二容器处传送第二胶粘剂到衬底,其后将第二晶粒键合到第二胶粘剂上。
Description
技术领域
本发明涉及电子器件的键合,特别是涉及使用销或冲头(stamps)来印刷(print)黏性或类膏状液体如电子器件键合中所使用的环氧树脂的胶粘剂点胶机(adhesive dispensers)。
背景技术
晶粒键合是集成电路封装件封装过程中重要的工序。在晶粒键合工序中,切割自晶圆处的晶粒被取出并被键合至衬底如引线框上,以进行接下来的处理,如导线键合和模塑。在将晶粒键合到衬底以前,焊膏滴注(paste-dispensing)机构将胶粘剂滴注在衬底上。然后,晶粒键合机的晶粒拾取放置机构将晶粒放置在衬底上滴涂有胶粘剂的位置。最后,使用加热器将胶粘剂固化,以便于将晶粒键合至衬底上。
在电子工业中,不同的滴注胶粘剂的方法已经发展来跟上在广泛而大量的封装组件中需要胶粘剂和导电性环氧树脂的制造的迅猛发展。滴注应用已经同样也被延展到需要新型封装灌注技术的其他领域。具有不同黏度的大量的流体材料正被用作为胶粘剂,从焊膏、导电性胶粘剂和围堰混合料(damming compound)到助焊剂、导热膏和底部填充。各种不同的滴注方法是可用的,如戳印(stamping)、模板印刷(Stencil Printing)、喷射滴胶(jet-dispensing)和喷嘴或针式点胶(nozzle or needle dispensing)。
戳印也被称之为涂布(daubing)或者销转移(pin transfer),包括将柔性工具(compliant tool)浸入到液态胶粘剂容器中,然后将附着于该工具上的液态胶粘剂传送到衬底如引线框上。这种方法被频繁地使用以在衬底上获得很小的胶点或胶粘剂图案,或者当胶粘剂不适合于通过点胶机喷嘴(dispenser nozzles)点胶时。戳印系统请参见图1和图2所示,其分别为传统的胶粘剂戳印系统100的立体示意图和侧面示意图。该戳印系统100包含有胶粘剂盘102和戳印销106,该胶粘剂盘具有容纳胶粘剂原料104的容器,该戳印销106附着于戳印臂108上,戳印臂被设计来将戳印销106浸入到胶粘剂原料104中,并将戳印销106上的胶粘剂原料104传送到位于戳印水平面上的衬底上。
不同类型的胶粘剂可能被需要用于将不同的晶粒键合在衬底上。例如,非导电性的胶粘剂可能被使用于键合蓝和绿发光二极管(LED)晶粒,而银环氧树脂可能适用于键合红LED晶粒。当需要不同的胶粘剂时,胶粘剂盘102和戳印销106将必须被相应地替代以适合于不同的胶粘剂。如果相同的戳印销106和胶粘剂盘102被应用于不同的胶粘剂,那么在戳印销106和胶粘剂盘102用来传送不同的胶粘剂以前,它们必须被移离进行清洁。这导致了加工的空闲时间和延长了操作工序。可以选择地,为了避免必须移离或改变任何戳印销和胶粘剂盘,每个机器可以被指定来处理一种类型的晶粒或者使用同一种胶粘剂类型的相同范围内的晶粒。由于重复这导致成本增加。因此,提供一种戳印系统,其在避免多余的加工空闲时间或者重复性的同时,允许使用不同的胶粘剂,这是令人期望的。
发明内容
本发明的目的在于提供一种戳印系统,其能够在使用多种胶粘剂的时候,成功地将不同类型的胶粘剂应用于衬底上。
因此,一方面,本发明提供一种用于从胶粘剂供应处传送多种胶粘剂到衬底的方法,该方法包含有以下步骤:将第一戳印销移动至第一容器的位置,该第一容器容纳有第一胶粘剂;使用第一戳印销从第一容器处传送第一胶粘剂到衬底;将第一晶粒键合到第一胶粘剂上;将第二戳印销移动到第二容器的位置,该第二容器容纳有第二胶粘剂;使用第二戳印销从第二容器处传送第二胶粘剂到衬底;以及将第二晶粒键合到第二胶粘剂上。
另一方面,本发明提供一种用于从胶粘剂供应处传送多种胶粘剂到衬底以键合晶粒至衬底上的装置,该装置包含有:多个用于胶粘剂的容器,其中每个单独的容器被提供给每种类型的胶粘剂;以及多个戳印销,其用于将胶粘剂从容器传送到衬底,其中,每个戳印销被用来传送不同种的胶粘剂到衬底。
参阅后附的描述本发明实施例的附图,随后来详细描述本发明是很方便的。附图和相关的描述不能理解成是对本发明的限制,本发明的特点限定在权利要求书中。
附图说明
通过参考根据本发明较佳实施例详细介绍,并参考附图很容易理解本发明,其中。
图1为传统的胶粘剂戳印系统的立体示意图。
图2为从图1中方向A所视传统的胶粘剂戳印系统的侧视示意图。
图3根据本发明较佳实施例所述的用于多种胶粘剂的戳印系统的俯视示意图。
图4为从图3中方向B所视戳印系统的侧视示意图。
图5包含图5A、图5B和图5C,其为图3中的戳印系统的俯视示意图,其表明了所选定的胶粘剂盘移动到拾取位置。
图6所示为根据本发明另一较佳实施例所述的戳印系统的俯视示意图。
图7所示为从图3中的方向C所视戳印系统的多个戳印销组件的侧视示意图。
具体实施方式
在此本发明较佳实施例将结合附图进行描述。
图3和图4所示分别为根据本发明较佳实施例所述的用于胶粘剂的戳印系统10的俯视和侧视示意图。该戳印系统10由旋转平台12和多个戳印销组件13组成,该旋转平台12包含有多个胶粘剂盘15。旋转平台12以沿着径向的方式装配在盘座22上,并可围绕轴线24旋转。多个戳印销组件13包含有相邻于旋转平台12设置的可旋转的戳印销固定器14,其支撑有多个戳印销16。戳印销16的数量较合适地和包含于旋转平台12的胶粘剂盘15的数量相匹配。每个胶粘剂盘可以容纳不同类型的胶粘剂18,每个戳印销16可以用来仅仅浸入一种类型的胶粘剂18中。
当需要一种特定类型的胶粘剂18时,容纳有所需胶粘剂18的胶粘剂盘15被旋转到拾取位置。戳印销固定器14上被预选定传送所述胶粘剂18的戳印销16被旋转以便于该戳印销定位在拾取位置而拾取和传送胶粘剂18到设置于戳印水平面上的衬底上。胶粘剂盘15和戳印销16二者也可以以直移的方式移动到拾取位置。除此以外,胶粘剂盘15可以在固定位置,而戳印销16在胶粘剂盘15不同的固定位置处拾取环氧树脂。在另一个可能的实施例中,在旋转平台12的上方,多个戳印销16可能以一行或多行的方式布置在线性驱动臂上,或者胶粘剂盘15可能以行的方式被装配。因此,线性驱动臂上所选定的戳印销16能够定位在所期望的胶粘剂盘15的上方,以传送胶粘剂18。
图5A至图5C所示为图3中的戳印系统10的俯视图,其表明了所选定的胶粘剂盘15移动到拾取位置。图5A表明了当胶粘剂盘1位于拾取位置时所布置的胶粘剂盘1、2、3和4。装配在戳印销固定器14的戳印销16之一定位于胶粘剂盘1上方,以便于将戳印销16浸入至胶粘剂盘1中的胶粘剂18中,然后将胶粘剂18传送至衬底。其后将晶粒键合至衬底上的胶粘剂18上。当不同的晶粒将被放置在衬底上时,不同的胶粘剂可将被需要以将不同的晶粒安装至衬底。图5B表明围绕轴线24逆时针旋转的胶粘剂盘1、2、3、4, 其旋转一直到胶粘剂盘4被旋转到拾取位置,如图5C所示。同时,戳印销固定器14上被选定来和所需胶粘剂18一起使用的戳印销16被旋转至拾取位置的上方,并为将所需胶粘剂18传送至衬底作好准备。另一戳印销16传送所需的胶粘剂18至衬底,然后将另一晶粒键合至衬底上的胶粘剂上。以这种方式,当需要不同的胶粘剂将晶粒键合到衬底时,不再需要物理地卸载或替代使用中的胶粘剂盘,并且相应地,也不再需要为了和不同的胶粘剂一起使用而替代或清洁戳印销16。
图6所示为根据本发明另一较佳实施例所述的戳印系统的俯视图。在该实施例中,胶粘剂盘15以成行的方式被布置,它们可以被装配在线性驱动的传送器机构26上。如果这样的话,装载有胶粘剂18的成行的胶粘剂盘15可沿着第一线性轴被传送器机构26移动,而戳印销固定器14可沿着垂直于第一线性轴的第二线性轴移动。可以替代的是,戳印销固定器14可在水平面上沿着第一线性轴和相垂直的第二线性轴移动,以便于在所选定的胶粘剂盘上方定位每个戳印销16,而将戳印销16浸入到所选定的胶粘剂18中。在这种情形下,胶粘剂盘15可以是静止的而不需要移动。
图7所示为从图3中的方向C所视的戳印系统10的多个戳印销组件13的侧视示意图。多个戳印销组件13包含有可旋转的戳印销固定器14,多个戳印销16装配在戳印销固定器14上。通常,戳印系统10上,戳印销16的数量应至少等于胶粘剂盘15的数量。图7中所示为4个戳印销16,对应于本实施例中所阐述的4个胶粘剂盘15。所选定的用于传送胶粘剂18的戳印销16被旋转到拾取位置,以进行如上所述的每个传送动作。以这种方式,一个戳印销16可以用作为传送一种类型的胶粘剂18,而且没有必要为了和另一种类型的胶粘剂18一起使用该戳印销16而清洁它。
值得欣赏的是,当针对不止一种类型的晶粒而涉及不止一种胶粘剂的混合生产得以需要时,这种根据本发明较佳实施例所述包含有多个戳印销组件13的用于胶粘剂的戳印系统10的使用实现了有效的大量的晶粒键合。使用如上所述的戳印系统,胶粘剂盘12或者戳印销16的交替互换同样也得以自动地进一步加快工序。由于不需要停止晶粒键合机以卸载胶粘剂盘12或戳印销16或者使用另一个胶粘剂盘12或戳印销16替代它们,所以加工空闲时间大大减少。当使用多个晶圆装载器时,多个晶粒能够在单个的操作中和不同的胶粘剂一起被键合。为了和仅仅一种胶粘剂一起使用而提供单独的晶粒键合机以避免必须清洗、移除或替代任意的胶粘剂盘12或戳印销16,这也是没有必要的。所以,当键合不同的晶粒到衬底时,不需要多个晶粒键合机。而且,由于不止一种胶粘剂可以随同一种使用这种戳印系统10的晶粒键合机一起使用,所以灵活性能够得以实现。
此处描述的本发明在所具体描述的内容基础上很容易产生变化、修正和/或补充,可以理解的是所有这些变化、修正和/或补充都包括在本发明的上述描述的精神和范围内。
Claims (19)
1.一种用于从胶粘剂供应处传送多种胶粘剂到衬底的方法,该方法包含有以下步骤:
将第一戳印销移动至第一容器的位置,该第一容器容纳有第一胶粘剂;
使用第一戳印销从第一容器处传送第一胶粘剂到衬底;
将第一晶粒键合到第一胶粘剂上;
将第二戳印销移动到第二容器的位置,该第二容器容纳有第二胶粘剂;
使用第二戳印销从第二容器处传送第二胶粘剂到衬底;以及
将第二晶粒键合到第二胶粘剂上。
2.如权利要求1所述的方法,其中,多个戳印销以径向的方式装配在可旋转的戳印销固定器上,而将第一戳印销或第二戳印销移动至第一容器或第二容器的位置的步骤还包含有以下步骤:
旋转该可旋转的戳印销固定器,以分别将第一戳印销或第二戳印销定位在第一容器或第二容器的上方。
3.如权利要求2所述的方法,其中,多个戳印销被安装在线性移动臂上。
4.如权利要求3所述的方法,其中,该移动臂在水平面上沿着两个垂直轴线线性移动。
5.如权利要求1所述的方法,其中,多个容器装配在旋转平台上,该旋转平台可围绕轴线旋转,而将第一戳印销或第二戳印销移动至第一容器或第二容器的位置的步骤还包含有以下步骤:
旋转该旋转平台到拾取位置,以分别将第一戳印销或第二戳印销浸入到第一容器或第二容器中。
6.如权利要求1所述的方法,其中,该容器被设置在固定位置,且是不可移动的。
7.如权利要求1所述的方法,其中,该容器以成行的方式被设置,而将第一戳印销或第二戳印销移动至第一容器或第二容器的位置的步骤还包含有以下步骤:
将第一容器或第二容器线性地传送到拾取位置,以分别将第一戳印销或第二戳印销浸入到第一容器或第二容器中。
8.如权利要求7所述的方法,其中,该容器被装配在线性驱动的传送器机构上。
9.如权利要求1所述的方法,其中,每个容器包括胶粘剂盘。
10.一种用于从胶粘剂供应处传送多种胶粘剂到衬底以键合晶粒至衬底上的装置,该装置包含有:
多个用于胶粘剂的容器,其中每个单独的容器被提供给每种类型的胶粘剂;以及
多个戳印销,其用于将胶粘剂从容器传送到衬底,其中,每个戳印销被用来传送不同种的胶粘剂到衬底。
11.如权利要求10所述的装置,该装置还包含有:
可旋转的戳印销固定器,其被配置来支撑多个戳印销,其中该多个戳印销以径向的方式设置在可旋转的戳印销固定器上。
12.如权利要求10所述的装置,其中,戳印销的总数量等于容器的总数量。
13.如权利要求10所述的装置,其中,戳印销被装配在移动臂上,该移动臂被配置来线性移动至拾取位置。
14.如权利要求13所述的装置,其中,该移动臂在水平面上沿着两个垂直轴线线性移动。
15.如权利要求10所述的装置,该装置还包含有:
旋转平台,其可围绕轴线旋转,在该旋转平台上装配有多个容器。
16.如权利要求10所述的装置,其中,该容器以成行的方式被设置,并被线性地移动到拾取位置,以便于戳印销浸入到每个容器中。
17.如权利要求16所述的装置,该装置还包含有:传送器机构,其用于移动每个容器到拾取位置。
18.如权利要求10所述的装置,其中,该容器的位置是固定的,而多个戳印销被移动到每个容器的位置,以拾取胶粘剂。
19.如权利要求10所述的装置,其中,每个容器包括胶粘剂盘。
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