Patent ID: 7355283

Claim:
A first pattern formed of an electrical connector on a first surface of a substrate, the substrate capable of supporting and electrically connecting to a semiconductor dice, a second surface of the substrate opposite the first surface including a second pattern, the first pattern comprising: an etched portion; an unetched portion surrounding the etched portion, the first pattern for reducing a mechanical stress generated by the second pattern on the semiconductor dice during a molding process; wherein the etched portion of the first pattern on the first surface of the substrate aligns with and overlies a portion of the second pattern; wherein the portion of the second pattern is a contact finger for forming an external electrical connection; and wherein the etched portion of the first pattern forms a portion of an ellipse, said ellipse having a width approximately equal to a width of the contact finger, and said ellipse having a length greater than or equal to a length of the contact finger.