Patent ID: 6281092
Filing Date: 2001-08-28
Classification: H01L

Abstract:
A method of fabricating a capacitor on a semiconductor substrate utilizing only a single masking step, said method comprising:forming a first capacitor electrode on the semiconductor substrate and forming a planar insulating layer over said first capacitor electrode;forming a photoresist layer over said planar insulating layer and patterning said photoresist layer utilizing an only mask to form an opening over said first capacitor electrode;through said opening, etching said planar insulating layer to form a trench in said planar insulating layer aligned with said first capacitor electrode;after etching said planar insulating layer and before forming a capacitor dielectric layer, removing said photoresist layer;thereafter, forming said capacitor dielectric layer directly on said planar insulating layer and in said trench;forming a second capacitor electrode over said capacitor dielectric layer and in alignment with said first capacitor electrode; andplanarizing to expose said planar insulating layer.