Patent ID: 7221045
Filing Date: 2007-05-22
Classification: H01L

Abstract:
1. A flip chip semiconductor device comprising: a semiconductor element having a plurality of electrodes arranged on one side; a plurality of conductive bumps disposed on the corresponding electrodes of the semiconductor element; a lead frame including a plurality of leads, at least some of the leads each having at least one groove formed thereon; and a solder material disposed in and around the groove of the leads to a predetermined height over an upper surface of the leads, the solder material fused with the corresponding conductive bumps with the height of the solder material disposed around the groove risen to a risen height by the fusion due to a surface tension such that the risen height of the solder material provides a sufficient electrical connection with the corresponding conductive bumps while the solder material around the groove is restricted from being displaced out of position during the fusion due to the groove.