| abstract |
A new method is provided for the creation of openings in a layer of dielectric while at the same time forming a dielectric that forms the dielectric of MIM capacitors. Under the first embodiment of the invention a layer of insulation, such as Si x N y or SiON or TaN and TiN, is deposited over the surface of a semiconductor substrate, points of electrical contact have been provided in this semiconductor surface. A layer of IMD is deposited over the layer of insulation, an opening is created in the layer of IMD that aligns with and overlays a contact point over which a MIM capacitor is to be created. Under the second embodiment of the invention, a stack of three layers of a first layer of TaN followed by SiO x or Si x N y followed by a second layer of TaN is used as the dielectric layer for the capacitor whereby the first layer of TaN is used as an etch stop for an opening that is etched for the creation of the upper plate of the capacitor. |