Patent ID: 6940158
Filing Date: 2005-09-06
Classification: H01L

Abstract:
1. A stacked microelectronic assembly comprising: a flexible sheet having oppositely-directed obverse and reverse surfaces, the sheet including at least a first panel and a second panel and having a folding portion connecting the first panel and the second panel to each other; terminals exposed at the reverse surface of the second panel for mounting the sheet to an external circuit; at least a first microelectronic element having a front face and an opposite rear face, said first microelectronic element being mounted on the obverse surface of the first panel wherein the front face surface confronts the obverse surface of the sheet so that when folded to form a stack a substantial area of the rear face of the first microelectronic element closely confronts the obverse surface of the second panel, the rear face directly abutting or only a layer of dielectric adhesive being between the rear face and the obverse surface of the second panel such that a distance between the rear face of the first microelectronic element and the obverse surface of the second panel is less than about 20 microns whereby the second panel is kept substantially flat; and one or more wiring layers including traces extending along the sheet between the panels by way of the folded portion, at least some of the traces electrically connecting the first microelectronic element to at least some of the terminals.