Patent ID: 6051886
Filing Date: 2000-04-18
Classification: H01L

Abstract:
A stacked die multichip device comprising:a substrate;a lower die having two opposing side edges each including bonding sites therealong, a base surface and an upper surface, the lower die being attached to the substrate with the lower die's base surface facing the substrate;an upper die having a base surface and an upper surface, and having a width less than the distance separating any two opposing bonding sites along the opposing side edges of the lower die;the upper die being attached above the lower die with the upper die's base surface facing the upper surface of the lower die; andthe upper die being rotated, in a plane substantially parallel to the upper surface of the lower die, through an angle sufficient to insure that no portion of the upper die interferes with a vertical line of sight of any bonding site on the lower die to permit wire bonding of the same, the upper die being fixed in this position and receiving no additional underlying support beyond that gained from the lower die.