Support member for mounting a microelectronic circuit package
    27.
    发明授权
    Support member for mounting a microelectronic circuit package 失效
    用于安装微电子电路封装的支撑构件

    公开(公告)号:US5923538A

    公开(公告)日:1999-07-13

    申请号:US646037

    申请日:1996-05-07

    Inventor: Emily Hawthorne

    Abstract: A Tape-Automated-Bonding (TAB) package includes a resilient polyimide layer that supports a metal leadframe. A microelectronic circuit die is mounted in a hole in the polyimide layer and interconnected with inner leads of the leadframe. The TAB package is adhered to a support member having spacers that abut against the surface of a printed circuit board (PCB) on which the package is to be mounted and provide a predetermined spacing between the leadframe and the surface. Outer leads that protrude from the leadframe are bent into a shape so as extend, in their free state, toward the surface at least as far as the spacers. The package and support member assembly is placed on the PCB surface, and the combination of the weight of the assembly, the resilience of the leads and the preset standoff height enable the leads to resiliently deform so that the spacers abut against the surface and the leads conformably engage with the surface for soldering or other ohmic connection to conjugate bonding pads on the surface. The support member can be formed with lead retainers around which the leads extend to form loops that resiliently and conformably engage with the surface as the assembly is lowered thereon. The support member maintains coplanarity, adds weight to the package, pre-sets the standoff to protect the formed outer leads during surface mounting and enables the package to be shipped without a separate carrier.

    Abstract translation: 胶带自动键合(TAB)封装包括支撑金属引线框架的弹性聚酰亚胺层。 微电子电路管芯安装在聚酰亚胺层的孔中并与引线框的内引线相互连接。 TAB封装被粘附到具有间隔件的支撑构件上,所述间隔件抵靠在其上将要安装封装件的印刷电路板(PCB)的表面,并且在引线框架和表面之间提供预定间隔。 从引线框突出的外引线弯曲成一种形状,以便在其自由状态下至少与间隔物一样延伸。 封装和支撑构件组件放置在PCB表面上,并且组件的重量,引线的弹性和预设的间隔高度的组合使得引线能够弹性变形,使得间隔件抵靠表面和引线 顺应地与表面接合以进行焊接或其他欧姆连接以在表面上共轭接合焊盘。 支撑构件可以形成有引线保持器,引线延伸到所述引线保持器,当所述组件降低时,所述引线延伸以形成与所述表面弹性和顺应地接合的环。 支撑构件保持共面性,增加了包装的重量,预先设定了间隔,以在表面安装期间保护形成的外引线,并使得包装在没有单独载体的情况下运输。

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