CN105977203A - 半导体元件及其制造方法 - Google Patents
半导体元件及其制造方法 Download PDFInfo
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Abstract
本发明关于一种半导体元件及其制造方法。该半导体元件包括一基板、一第一重布层及一导电孔。该基板具有一基板本体及一焊垫。该焊垫及该第一重布层邻近于该基板本体的第一表面,且彼此电性连接。互连金属位于该基板本体的一贯穿孔中,且接触该第一重布层。藉此,该焊垫可经由该第一重布层及该导电孔电性连接至该基板本体的第二表面。
Description
本申请是申请人于2013年1月14日提交的、申请号为“201310012910.7”的、发明名称为“半导体元件及其制造方法”的发明专利申请的分案申请。
技术领域
本发明关于一种半导体封装,特别的是,关于三维(3D)半导体封装。
背景技术
已知半导体元件的制造方法的起始步骤中,晶圆厂所提供的基板可能具有各种不良的特性。举例而言,焊垫的尺寸可能太小,或者其可能具有太多不同电路、金属层及介电层而阻碍导电孔(Conductive Vias)形成于该基板中。特言之,要进行后钻孔(Via Last)工艺以从该晶圆背面蚀刻贯穿该基板以到达该原始焊垫是有困难的。
发明内容
本揭露的一方面关于一种半导体元件。在一实施例中,该半导体元件包括一基板,具有一焊垫;一第一重布层,邻近于该基板的一第一表面,且电性连接至该焊垫;及一导电孔,形成于该基板中。该导电孔包含一环状晶种层及一互连层,该环状晶种层位于该基板上,该互连层具有一位于该晶种层的一内表面上的外表面,且电性连接至该第一重布层。该基板具有一介电层,位于该基板的该第一表面上,该介电层具有一显露该焊垫的第一开口及一对应该导电孔的第二开口。该导电孔延伸至该介电层的该第二开口内。在一实施例中,该第一重布层的一部分延伸至该介电层的该第二开口内。该半导体元件更包括一第二重布层,邻近于该基板的一第二表面,且电性连接至该导电孔。此外,该半导体元件包括一球下金属层(Under BumpMetallurgy,简称UBM),位于该第二重布层上;及一焊球,位于该球下金属层(UnderBump Metallurgy,简称UBM)上。
本揭露的另一方面关于一种制造方法。在一实施例中,一种半导体元件的制造方法包括提供一基板,该基板具有一焊垫;形成一第一重布层邻近于该基板的一第一表面,其中该第一重布层电性连接至该焊垫;将该基板附着至一载体上;及形成一导电孔于该基板中,该导电孔电性连接至该第一重布层。该基板具有一介电层,位于该基板的该第一表面上,且该第一介电层具有一显露该焊垫的第一开口。该方法更包括形成一第二重布层邻近于该基板的一第二表面,其中该第二重布层电性连接至该导电孔。
附图说明
图1显示本发明的一实施例的半导体元件的剖视示意图;
图2至图16显示本发明图1的该半导体元件的制造方法的一实施例的示意图;
图17显示本发明的另一实施例的半导体元件的剖视示意图;及
图18至图20显示本发明图17的该半导体元件的制造方法的另一实施例的示意图。
具体实施方式
参考图1,显示本发明的一实施例的半导体元件1的剖视示意图。该半导体元件1包括一基板10、一第一重布层24、一第二重布层39、一保护层40、一球下金属层(Under Bump Metallurgy,简称UBM)44及一焊球45。
如图1所示,该基板10具有一基板本体11(包含一导电孔20形成于其内)、一焊垫12及一第一介电层13。在本实施例中,该基板本体11的材质为硅。然而,在其他实施例中,该基板本体11的材质可以是玻璃。该基板本体11具有一第一表面111、一第二表面112及一通孔113。该焊垫12邻近于该基板本体11的第一表面111。在本实施例中,该第一介电层13位于该基板本体11的该第一表面111上,且具有一第一开口131及一第二开口132。该第一介电层13覆盖该焊垫12,除了该第一开口131显露该焊垫12的一部份。该第二开口132的位置对应该导电孔20的位置。该第一介电层13的材质可以是聚亚酰胺(PI)或聚丙烯(PP)。
在图1中,该第一重布层24邻近于该基板本体11的该第一表面111,且电性连接至该焊垫12。在本实施例中,该第一重布层24包括一第一晶种层21及一第一金属层23。该第一晶种层21的材质为氮化钽(Tantalum Nitride)或钨化钽(TantalumTungsten),且该第一金属层23的材质为铜。然而,该第一晶种层21可以被省略;亦即,该第一金属层23可以直接位于该第一介电层13上。该第一重布层24位于该第一介电层13上,且接触位于该第一介电层13第一开口131内的焊垫12。
在图1中,该导电孔20位于该基板本体11的该通孔113中,且接触该第一重布层24。在本实施例中,该导电孔20更延伸至该第一介电层13的该第二开口132内。该导电孔20包含一中心绝缘材料31及一互连金属30。在本实施例中,该互连金属30为杯状且定义出一中心槽,且该中心绝缘材料31位于该中心槽中。可以理解的是,该互连金属30可以是一实心柱(因此该中心绝缘材料31可以被省略)。较佳地,该导电孔20更具有一互连晶种层29,其环绕该互连金属30,且该互连晶种层29的底部接触该第一重布层24,且该导电孔20与该第一重布层24间具有一界面(Interface)。在本实施例中,该基板10更具有一外绝缘材料34,位于该通孔113中且环绕该互连金属30及该互连晶种层29。如图1所示,该外绝缘材料34并未延伸至该第一介电层13的该第二开口132中;因此,该导电孔20的底面并未和该外绝缘材料34的底面共平面,且该导电孔20的长度大于该外绝缘材料34的长度。在本实施例中,该中心绝缘材料31的材质为高分子聚合物,其与该外绝缘材料34相同。
在图1中,该半导体元件1更包括一第二介电层35。该第二介电层35位于该基板本体11的该第二表面112上,且具有一开口351以显露该导电孔20及该外绝缘材料34。该第二介电层35的材质可以是聚亚酰胺(PI)或聚丙烯(PP)。该第二重布层39邻近于该基板本体11的该第二表面112,且电性连接至该导电孔20。在本实施例中,该第二重布层39包括一第二金属层38及一第二晶种层36。该第二晶种层36的材质为氮化钽(Tantalum Nitride)或钨化钽(Tantalum Tungsten),且该第二金属层38的材质为铜。然而,该第二晶种层36可以被省略;亦即,该第二金属层38可以直接位于该第二介电层35上。该第二重布层39位于该第二介电层35上,且接触位于该第二介电层35的开口351内的导电孔20。
在图1中,该保护层40覆盖该第二重布层39及该第二介电层35,且具有开口401以显露该第二重布层39的一部分。该保护层40的材质与该第二介电层35的材质相同。该球下金属层(UBM)44位于该保护层40的该开口401中,且位于该第二重布层39上,以电性连接该第二重布层39。在本实施例中,该球下金属层(UBM)44更延伸至该保护层40的顶面。该球下金属层(UBM)44包括一第三金属层43及一第三晶种层41。该第三金属层43为单层或多层结构,且该第三晶种层41的材质为氮化钽(Tantalum Nitride)。然而,该第三晶种层41可以被省略;亦即,该第三金属层43可以接触该第二重布层39。该焊球45位于该球下金属层(UBM)44上。
参考图2至图16,显示本发明该半导体元件1的制造方法的一实施例的示意图。
参考图2,提供一基板10。该基板10具有一基板本体11、一第一介电层13及一焊垫12。在本实施例中,该基板本体11的材质为硅。然而,在其他实施例中,该基板本体11的材质可以是玻璃。该基板本体11具有一第一表面111及一第二表面112,且该焊垫12邻近于该基板本体11的第一表面111。在本实施例中,该第一介电层13位于该基板本体11的该第一表面111上,且具有一第一开口131。该第一介电层13覆盖该焊垫12,除了该第一开口131显露该焊垫12的一部份。该第一介电层13的材质可以是聚亚酰胺(PI)或聚丙烯(PP)。要注意的是,如果在起始步骤中仅提供该基板本体11,则该方法更包括形成该第一介电层13及该焊垫12的步骤。
参考图3,形成一第一晶种层21于该第一介电层13及其第一开口131上。该第一晶种层21接触位于该第一开口131中的焊垫12。接着,形成一光阻层22于该第一晶种层21上,该光阻层22具有一开口221以显露该第一晶种层21的一部分。接着,形成一第一金属层23于该光阻层22的开口221中。该第一金属层23的材质为铜,且该第一晶种层21的材质为氮化钽(Tantalum Nitride)或钨化钽(Tantalum Tungsten)。
参考图4,移除该光阻层22。接着,移除未被该第一金属层23覆盖的第一晶种层21的一部分以形成该第一重布层24。该第一重布层24邻近于该基板本体11的该第一表面111,且电性连接至该焊垫12。在本实施例中,该第一重布层24位于该第一介电层13上,且接触位于该第一介电层13第一开口131内的焊垫12。
参考图5,利用一黏胶层25将该基板10附着至一载体26,其中该基板本体11的该第一表面111面对该载体26。接着,从该基板本体11的该第二表面112薄化该基板本体11。
参考图6,形成一光阻层27于该基板本体11的该第二表面112上,该光阻层27具有一开口271以显露该第二表面112的一部分。接着,根据该光阻层27的开口271从该基板本体11的该第二表面112形成一孔洞28。该孔洞28贯穿该基板本体11及该第一介电层13,使得该第一介电层13具有一第二开口132。亦即,该第二开口132为该孔洞28的一部份,且贯穿该第一介电层13。因此,该第一重布层24的一部分被该孔洞28所显露。要注意的是,该孔洞28的位置并不对应该焊垫12。
参考图7,形成一互连晶种层29于该孔洞28中,其中该互连晶种层29接触该第一重布层24。接着,形成一互连金属30于该互连晶种层29上。在本实施例中,该互连金属30为杯状且定义出一中心槽301。
参考图8,将一中心绝缘材料31填满该中心槽301。因此,一导电孔20形成于该孔洞28中,且更延伸至该第一介电层13的该第二开口132内以接触该第一重布层24。在其他实施例中,该互连金属30可以是一实心柱,且该中心绝缘材料31可以被省略。
参考图9,形成一光阻层32于该基板本体11的该第二表面112上,该光阻层32具有一开口321以显露该导电孔20。接着,根据该开口321从该基板本体11的该第二表面112形成一圆形槽33,其中该圆形槽33环绕该导电孔20。在本实施例中,该圆形槽33仅贯穿该基板本体11以形成该通孔113。
参考图10,形成一外绝缘材料34于该圆形槽33中以环绕该互连金属30及该互连晶种层29。较佳地,该中心绝缘材料31的材质为高分子聚合物,其与该外绝缘材料34相同。在本实施例中,该外绝缘材料34并未延伸至该第一介电层13中;因此,该导电孔20的底面并未和该外绝缘材料34的底面共平面。
参考图11,形成一第二介电层35于该基板本体11的该第二表面112上,该第二介电层35且具有一开口351以显露该导电孔20及该外绝缘材料34。该第二介电层35的材质可以是聚亚酰胺(PI)或聚丙烯(PP)。接着,形成一第二晶种层36于该第二介电层35及其开口351上。该第二晶种层36接触位于该开口351内的导电孔20。
参考图12,形成一光阻层37于该第二晶种层36上,该光阻层37具有一开口371以显露该第二晶种层36的一部分。接着,形成一第二金属层38于该光阻层37的开口371中。该第二金属层38的材质为铜,且该第二晶种层36的材质为氮化钽(TantalumNitride)或钨化钽(Tantalum Tungsten)。
参考图13,移除该光阻层37。接着,移除未被该第二金属层38覆盖的第二晶种层36的一部分以形成一第二重布层39。在本实施例中,该第二重布层39位于该第二介电层35上,且接触位于该第二介电层35的开口351内的导电孔20。
参考图14,形成一保护层40于该第二介电层35及该第二重布层39上,该保护层40具有开口401以显露该第二重布层39的一部分。该保护层40的材质与该第二介电层35的材质可以相同。接着,形成一第三晶种层41于该保护层40及其开口401。该第三晶种层41的材质为氮化钽(Tantalum Nitride)或钨化钽(Tantalum Tungsten)。
参考图15,形成一光阻层42于该第三晶种层41上,该光阻层42具有一开口421以显露该第三晶种层41的一部分。接着,形成一第三金属层43于该光阻层42的开口421中。该第三金属层43为单层或多层结构。
参考图16,移除该光阻层42。接着,移除未被该第三金属层43覆盖的第三晶种层41的部分以形成一球下金属层(UBM)44。接着,形成一焊球45于该球下金属层(UBM)44上,且移除该载体26及该黏胶层25,以制得该半导体元件1。
在本实施例中,如果晶圆厂所提供的该基板10具有各种不良的电路,例如,该焊垫12的尺寸太小,该焊垫12具有太多层,或者该焊垫12位于不符需求的位置,该焊垫12仍可经由该第一重布层24及该导电孔20电性连接至该基板本体11的该第二表面112。
参考图17,显示本发明的另一实施例的半导体元件2的剖视示意图。本实施例的半导体元件2与图1所示的半导体元件1大致相同,其中相同元件赋予相同的编号。本实施例的半导体元件2与图1所示的半导体元件1的不同处在于该第一介电层13的第二开口132a内的结构不同。在本实施例中,该第一重布层24具有一第一部份241及一第二部份242。该第一重布层24的第一部份241位于该第一介电层13的第一开口131内,且包含该第一金属层23的一第一部份231及该第一晶种层21的一第一部份211。该第一重布层24的第二部份242位于该第一介电层13的第二开口132a内,且包含该第一金属层23的一第二部份232及该第一晶种层21的一第二部份212。该第一重布层24的第一部份241接触该焊垫12,且该导电孔20接触该第一重布层24的第二部份242。
在图17中,该导电孔20并未延伸至该第一介电层13内。因此,该导电孔20的底面和该外绝缘材料34的底面实质上共平面,且该导电孔20的长度等于该外绝缘材料34的长度。较佳地,该第一介电层13的第二开口132a的尺寸略大于该导电孔20的尺寸,使得该第一重布层24的第二部份242的尺寸略大于该导电孔20的尺寸,以确保其彼此间的电性连接。
参考图18至图20,显示本发明该半导体元件2的制造方法的另一实施例的示意图。本实施例的方法与图2至16所示的方法大致相同,其不同处如下所示。
参考图18,提供一基板10。该基板10具有一基板本体11、一第一介电层13及一焊垫12。在本实施例中,该基板本体11的材质为硅。然而,在其他实施例中,该基板本体11的材质可以是玻璃。该基板本体11具有一第一表面111及一第二表面112。该第一介电层13位于该基板本体11的该第一表面111上,且具有一第一开口131及一第二开口132a。该第一介电层13覆盖该焊垫12,且该第一开口131显露该焊垫12的一部份。该第二开口132a显露该基板本体11的该第一表面111的一部份。要注意的是,如果在此起始步骤所提供的该基板10不具有该第二开口132a,则该方法更包括形成该第二开口132a的步骤。
参考图19,形成一第一晶种层21于该第一介电层13及其第一开口131及第二开口132a上。该第一晶种层21具有一位于该第一开口131内的第一部份211,及一位于该第二开口132a内的第二部份212。该第一晶种层21的第一部份211接触该焊垫12,且该第一晶种层21的第二部份212接触该基板本体11。接着,形成一光阻层22于该第一晶种层21上,该光阻层22具有一开口221以显露该第一晶种层21的一部分。接着,形成一第一金属层23于该光阻层22的开口221中。该第一金属层23的材质为铜,且该第一晶种层21的材质为氮化钽(Tantalum Nitride)或钨化钽(TantalumTungsten)。该第一金属层23具有一位于该第一开口131内的第一部份231,及一位于该第二开口132a内的第二部份232。
参考图20,移除该光阻层22。接着,移除未被该第一金属层23覆盖的第一晶种层21的部分以形成该第一重布层24。该第一重布层24具有该第一部份241及该第二部份242。该第一重布层24的第一部份241位于该第一介电层13的第一开口131内,且包含该第一金属层23的一第一部份231及该第一晶种层21的一第一部份211。该第一重布层24的第二部份242位于该第一介电层13的第二开口132a内,且包含该第一金属层23的一第二部份232及该第一晶种层21的一第二部份212。该第一重布层24的第一部份241接触该焊垫12。
在图20中,利用一黏胶层25将该基板10附着至一载体26。接着,从该基板本体11的该第二表面112薄化该基板本体11。接着,根据该光阻层27的开口271从该基板本体11的该第二表面112形成一孔洞28。在本实施例中,该孔洞28仅贯穿该基板本体11,以显露该第一重布层24的第二部分242。
参考图17,形成该导电孔20于该孔洞28中以接触该第一重布层24的第二部分242。接着,形成一外绝缘材料34、一第二介电层35、一第二重布层39、一保护层40、一球下金属层(UBM)44及一焊球45于该基板本体11的该第二表面112,如图9至16所示,以制得该半导体元件2。
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 (10)
1.一种半导体元件,其特征在于,包括
一基板,具有一焊垫及一介电层,该介电层位于该基板的一第一表面上,该介电层具有一显露该焊垫的第一开口;
一第一重布层,邻近于该基板的该第一表面,且电性连接至该焊垫;及
一导电孔,形成于该基板中,该导电孔包含一互连晶种层及一互连层,该互连晶种层位于该基板上,该互连层具有一位于该互连晶种层的一内表面上的外表面,且电性连接至该第一重布层,其中该介电层更具有一对应该导电孔的第二开口,该互连晶种层的底部接触该第一重布层,且该导电孔与该第一重布层间具有一界面。
2.如权利要求1的半导体元件,其特征在于,更包括一第二重布层,邻近于该基板的一第二表面,且电性连接至该互连层。
3.如权利要求1的半导体元件,其特征在于,该导电孔延伸至该介电层的该第二开口内。
4.如权利要求1的半导体元件,其特征在于,该第一重布层的一部分延伸至该介电层的该第二开口内。
5.如权利要求1的半导体元件,其特征在于,更包括:
一第二重布层,邻近于该基板的一第二表面,且电性连接至该互连层;
一球下金属层,位于该第二重布层上;及
一焊球,位于该球下金属层上。
6.如权利要求1的半导体元件,其特征在于,更包括一第二介电层,位于该基板的一第二表面上,该第二介电层具有一开口以显露该导电孔。
7.一种半导体元件,其特征在于,包括
一基板,具有一焊垫及一介电层,该介电层位于该基板的一第一表面上,该介电层具有一显露该焊垫的第一开口;
一第一重布层,邻近于该基板的该第一表面,且电性连接至该焊垫;及
一导电孔,形成于该基板中,该导电孔包含一互连晶种层,该互连晶种层位于该基板上,且电性连接至该第一重布层,该互连晶种层的底部接触该第一重布层,且该导电孔与该第一重布层间具有一界面。
8.如权利要求7的半导体元件,其特征在于,该介电层更具有一对应该导电孔的第二开口。
9.如权利要求8的半导体元件,其特征在于,该第一重布层的一部分延伸至该介电层的该第二开口内。
10.如权利要求7的半导体元件,其特征在于,更包括一第二介电层,位于该基板的一第二表面上。
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US8963316B2 (en) | 2015-02-24 |
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