Patent ID: 6083819
Filing Date: 2000-07-04
Classification: H01L

Abstract:
A method for forming a microelectronic assembly, the method comprising:fabricating a printed circuit board having a substrate, a die attach region on the substrate having a perimeter, a channel defined in the substrate, the channel extending away from the perimeter of the die attach region and across the die attach region, the printed circuit board further comprising bond pads disposed at the die attach region apart from the channel;mounting an integrated circuit die onto the printed circuit board such that a gap is formed therebetween and solder bump interconnections extend across the gap;dispensing a polymeric precursor onto the printed circuit board proximate to the perimeter of the die attach region;drawing the polymeric precursor into the gap by capillary action, wherein the polymeric precursor is suitable for forming an encapsulant and the channel enhances the flow of the polymeric precursor; andcuring the polymeric precursor to form the encapsulant.