A process for fabricating a crown-cell capacitor in a memory integrated circuit.
The process includes the step of forming a transistor having a contact region 353
at a surface of a semiconductor substrate 300. The transistor, with
the exception of the contact region, is covered with a first material 362, 366
and the first material and the contact region are then covered with a layer
of a second material 370. The portion of the second layer covering the contact
region is removed to expose the contact region so that the removal of the portions
of the second layer forms a cavity characterized by a bottom formed of the first
material and sides formed of the second material. Further steps in the process
include forming a first conductive layer 372 in the cavity to contact the
contact region and conform to the bottom and sides, forming a dielectric layer
376 over the first conductive layer, and forming a second conductive layer
378 over the dielectric layer.