Patent ID: 8624354
Filing Date: 2014-01-07
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate; a plurality of three-dimensional capacitors on the semiconductor substrate wherein each of the plurality of three-dimensional capacitors includes a first three-dimensional electrode, a capacitor dielectric layer, and a second three-dimensional electrode with the first three-dimensional electrode between the capacitor dielectric layer and the semiconductor substrate and with the capacitor dielectric layer between the first and second three-dimensional electrodes; a plurality of capacitor support pads with each capacitor support pad being arranged between adjacent first three-dimensional electrodes of adjacent three-dimensional capacitors with portions of the capacitor dielectric layers between the capacitor support pads and the semiconductor substrate, wherein each of the capacitor support pads comprises silicon nitride that is doped with carbon in the range of about 2% to about 6% by mass; and an etch stop layer on the semiconductor substrate and including a plurality of holes therethrough corresponding to the respective plurality of first three-dimensional electrodes, wherein the capacitor support pads comprise a material having an etch rate that is lower than an etch rate of the etch-stop layer.