Method for manufacturing plastic ball grid array package with integral heatsink
    9.
    发明申请
    Method for manufacturing plastic ball grid array package with integral heatsink 有权
    具有集成散热片的塑料球栅阵列封装的制造方法

    公开(公告)号:US20060019429A1

    公开(公告)日:2006-01-26

    申请号:US11213058

    申请日:2005-08-26

    IPC分类号: H01L21/50

    摘要: A plastic ball grid array semiconductor package employs a metal heat spreader having supporting arms embedded in the molding cap, in which the embedded supporting arms are not directly affixed to the substrate or in which any supporting arm that is affixed to the substrate is affixed using a resilient material such as an elastomeric adhesive. Also, a process for forming the package includes steps of placing the heat spreader in a mold cavity, placing the substrate over the mold cavity such that the die support surface of the substrate contacts the supporting arms of the heat spreader, and injecting the molding material into the cavity to form the molding cap. The substrate is positioned in register over the mold cavity such that as the molding material hardens to form the mold cap the embedded heat spreader becomes fixed in the appropriate position in relation to the substrate. Also, a process for forming the package includes steps of placing the heat spreader onto the substrate such that at least one of the supporting arms of the heat spreader is affixed to the substrate using a resilient fixative such as an elastomeric adhesive, placing a mold cavity over the heat spreader, and injecting the molding material into the cavity. The elastomeric adhesive holds the heat spreader in the appropriate position in relation to the substrate during injection of the molding material, and as the molding material hardens to form the mold cap the embedded heat spreader becomes fixed in the appropriate position in relation to the substrate. In some embodiments the under surface of the heat spreader at the interface between the heat spreader and the molding compound is roughened, or includes a black copper oxide layer, to improve adhesion and contact between the heat spreader and the molding material. The invention can provide significant improvements in manufacturability and reliability in use.

    摘要翻译: 塑料球栅阵列半导体封装采用金属散热器,其具有嵌入在成型帽中的支撑臂,其中嵌入的支撑臂不直接固定到基板上,或者使用附接到基板的任何支撑臂 弹性粘合剂如弹性材料。 此外,用于形成包装的方法包括以下步骤:将散热器放置在模腔中,将基板放置在模腔上,使得基板的模具支撑表面接触散热器的支撑臂,并且将模制材料 进入模腔以形成模制帽。 基板被定位在模腔上,使得当模制材料硬化以形成模具盖时,嵌入式散热器相对于基板固定在适当的位置。 而且,用于形成包装的方法包括以下步骤:将散热器放置在基板上,使得散热器的至少一个支撑臂使用诸如弹性体粘合剂的弹性固定剂固定到基板上,放置模具腔 在散热器上方,并将成型材料注入空腔。 弹性粘合剂在注射成型材料期间将散热器相对于基板保持在适当的位置,并且当模制材料硬化以形成模具盖时,嵌入的散热器相对于基板固定在适当的位置。 在一些实施例中,散热器在散热器和模塑料之间的界面处的下表面被粗糙化,或包括黑色氧化铜层,以改善散热器与成型材料之间的粘附和接触。 本发明可以在可制造性和使用可靠性方面提供显着的改进。