A capacitor is formed with a substantially concave shape and having optional
folded
or convoluted surfaces. The concave shape optimizes surface area within a small
volume and thereby enables the capacitor to hold a significant charge so as to
assist in increased miniaturization efforts in the microelectronic field. The capacitor
is fabricated in microelectronic fashion consistent with a dense DRAM array. Methods
of fabrication include stack building with storage nodes that extend above a semiconductor
substrate surface.
