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    • 77. 发明授权
    • Method of making the mould for encapsulating a leadframe package
    • 制造用于封装引线框架封装的模具的方法
    • US07351611B2
    • 2008-04-01
    • US10868171
    • 2004-06-15
    • Richard Mow Lum YeeChee Heng WongChee Ching YipSasidharan Suresh DassKam Chuan LauKok Siang Goh
    • Richard Mow Lum YeeChee Heng WongChee Ching YipSasidharan Suresh DassKam Chuan LauKok Siang Goh
    • H01L21/56
    • H01L21/565B29C45/14418B29C45/14655H01L21/4842H01L2924/0002H01L2924/00
    • A mould for encapsulating an integrated circuit package on a leadframe including a top mould-half and a complementary bottom mould-half enclosing a cavity for encapsulating said package wherein structures are provided on at least one of said mould-halves which, upon the closure of said mould-halves, closes off the spaces between adjacent leads of the leadframe to allow only said leads to extend out of said cavity. The structures may be protrusions from the mould half closing off the spaces. Notches or slots cut to allow the leads' extension are the preferred structures due to ease of machining. The mould design thus enables a leadframe package to be moulded with a peripheral flange as narrow as desired without the need to cut a broad conventional flange formed up to the dam bar because only the leads and tie bars are left to be singulated. A method for making the above mould as well as singulation methods for cutting and punching the leads and tie bars is also disclosed.
    • 一种用于将集成电路封装封装在引线框架上的模具,该引线框架包括顶部模具半部和互补的底部模具半部,该模具半部包围用于封装所述封装件的空腔,其中结构设置在所述模具半部中的至少一个上, 所述模具半部封闭引线框架的相邻引线之间的空间,以仅允许所述引线延伸出所述空腔。 结构可以是从模具半部封闭空间的突起。 由于加工容易,切槽或切槽允许引线延伸是优选的结构。 因此,模具设计使得引线框架封装可以根据需要被模制成具有窄的外围法兰,而不需要切割形成到坝条的宽的常规凸缘,因为只有引线和连接条被分割。 还公开了用于制造上述模具的方法以及用于切割和冲压引线和连接杆的切割方法。