Patent ID: 7074668
Filing Date: 2006-07-11
Classification: H01L

Abstract:
1. A method for forming a capacitor for use in a semiconductor device, comprising the steps of: providing a semiconductor substrate with a lower structure containing a plurality of storage node contacts formed thereon; depositing a nitride film for stopping etching, a first mold oxide film, an insulating film for supporting electrodes, and a second mold oxide film on the substrate in turn; etching the second mold oxide film, the insulating film, the first mold oxide film, and the nitride film to expose respective storage node contacts and thereby to form a plurality of contact holes arrayed in a zigzag pattern for storage electrodes; forming a storage electrode on a surface of respective contact holes for the storage electrode; removing the second mold oxide film; depositing a sacrificial oxide film burying the contact holes for the storage electrodes in a thickness of said sacrificial oxide film such that first outer portion of the storage electrodes is buried while another second outer portion of the storage electrodes is not completely buried by said sacrificial oxide film; etching back the sacrificial oxide film and the second nitride film to form a support network enclosing the respective storage electrodes and interconnected to each other; removing the sacrificial oxide film and the first mold oxide film, which are remained on the substrate, through wet etching; and forming a dielectric film and a plate electrode in turn on cylinder-type storage electrodes of which an interval is constantly maintained by the support network.