Patent ID: 6299463
Filing Date: 2001-10-09
Classification: H01L

Abstract:
A method of making a base for supporting at least two bare integrated circuit dice facing in the same direction, the method comprising:providing a supporting substrate;positioning at least one first conductive layer adjacently above the supporting substrate, the at least one first conductive layer including at least one localized region for direct conductive attachment by a conductive die-attach material to a backside surface of at least one die of the at least two bare integrated circuit dice to establish at least one of electrical and thermal conduction between the at least one first conductive layer and the at least one die;positioning at least one first insulating layer adjacently above the at least one first conductive layer, the at least one first insulating layer including at least one aperture therethrough to further define the at least one localized region of the at least one first conductive layer and to receive at least one of the at least two bare integrated circuit dice;positioning at least one second conductive layer adjacently above the at least one first insulating layer in a substantially parallel relationship therewith and substantially parallel to and vertically spaced apart from the at least one first conductive layer, the at least one second conductive layer including at least one other localized region for direct conductive attachment to a backside surface of at least one other die of the at least two bare integrated circuit dice by a conductive die-attach material, the at least one second conductive layer further including at least one aperture extending therethrough and being substantially vertically aligned with the at least one aperture in the at least one first insulating layer; andpositioning at least one second insulating layer adjacently above the at least one second conductive layer, the at least one second insulating layer including at least two other apertures extending therethrough, one of the at least two other apertures further defining the at least one other localized region of the at least one second conductive layer to receive the at least one other die of the at least two bare integrated circuit dice, the second of the at least two other apertures being substantially vertically aligned with and in communication with the at least one aperture extending through the at least one second conductive layer and with the at least one aperture extending through the at least one first insulating layer further defining the at least one localized region of the at least one first conductive layer.