Patent ID: 7821111

Claim:
A semiconductor device comprising: a metallic leadframe having a top and a bottom surface, a first thickness, and inner and outer segments; a semiconductor chip connected to the inner segments; the chip and the inner segments enclosed in plastic encapsulation, the outer segments un-enclosed; the outer segments having the first thickness a width and a length structured in five adjoining portions: the first portion protruding from the encapsulation about horizontally; the second portion forming a convex bend downwardly; the third portion being approximately straight downwardly; the fourth portion forming a concave bend upwardly; and the fifth portion being straight horizontally; the first, the second, the fourth and the fifth portions having the first thickness widthwise and lengthwise each lead having across the width a first groove located in the third portion, the groove having a centerline, and a depth; and a solder material bonding the fifth portion of the lead to a substrate and filling the groove.