Patent ID: 7109587
Filing Date: 2006-09-19
Classification: H01L,H05K

Abstract:
1. An apparatus comprising: a semiconductor die having an active surface and a non-active surface, the semiconductor die having a notched region around the perimeter of the active surface of the die; a single metal layer formed on the non-active surface of the die, the metal layer consisting of either TiNi or CrAgSn; a printed circuit board having a metal pad; solder affixing the single metal layer on the non-active surface of the die directly to the metal pad of the printed circuit board, whereby the single metal layer on the non-active surface of the die, the solder, and the metal pad form the interface between the die and the printed circuit board; and a molding compound encapsulating the die into a package, the molding compound covering the active surface of the die while leaving the single metal layer exposed on the non-active surface of the die.