Patent ID: 6297085
Filing Date: 2001-10-02
Classification: H01L

Abstract:
A method for manufacturing a ferroelectric capacitor comprising a first electrode made of iridium, a lead zirconate titanate ferroelectric film on the first electrode, and a second electrode made of iridium on the ferroelectric film; the manufacturing method having the following steps:a) depositing titanium, a constitutive metal element of the ferroelectric film, on the first electrode to form a titanium film;b) depositing an oxide of lead, a constitutive metal element of the ferroelectric film, on the titanium film;c) forming a lead titanate film including of the deposited lead oxide and titanium of the titanium film on the first electrode;d) depositing a constitutive material of the lead zirconate titanate ferroelectric film on the formed lead titanate film used as the crystal nucleus to form the ferroelectric film; ande) forming the second electrode on the ferroelectric film;wherein after the titanium film is deposited using the sputtering method, chemical vapor deposition method, or vacuum deposition method, the lead oxide is deposited using the sputtering method at a substrate temperature higher than the crystallization temperature of the lead titanate film; then with the constitutive material of the lead zirconate titanate ferroelectric film being deposited using the sputtering method at a substrate temperature higher than the perovskite crystal growth temperature; and afterwards with, a heat treatment of the deposited film being performed.