Patent ID: 6248624
Filing Date: 2001-06-19
Classification: H01L

Abstract:
A method for forming a fin-type capacitor in multiply layers of insulating materials that are deposited in a single deposition process comprising the steps of:positioning a preprocessed semiconductor substrate on a moving belt in a process chamber,providing at least two gas outlets each having a gas discharge nozzle facing and juxtaposed to said moving belt in said chamber,sequentially depositing at least two layers of different insulating materials on said preprocessed semiconductor substrate positioned on said moving belt by at least two different reactant gases flown from said at least two gas outlets,forming a contact opening through said at least two layers of insulating materials exposing said preprocessed semiconductor substrate,wet etching said contact opening with an etchant having substantially different etch rates for said at least two layers of different insulating materials such that a zig-zag configuration is formed in the contact opening,depositing a polysilicon layer in the contact opening forming a bottom electrode, andsequentially depositing an insulating layer as a capacitor dielectric and a polysilicon layer as a capacitor upper electrode.