Patent ID: 11923404
Assignee: LAM RESEARCH CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A method of forming ferroelectric hafnium oxide (HfO2) of a ferroelectric random access memory (FeRAM) memory structure, in a substrate processing system, the method comprising:
depositing a first HfO2 layer on a substrate;
depositing a hafnium nitride (HfN) layer on the first HfO2 layer;
depositing a second HfO2 layer on the HfN layer, the second HfO2 layer having the same material as the first HfO2 layer;
depositing a top electrode on the second HfO2 layer; and
annealing the first HfO2 layer, the second HfO2 layer, the HfN layer, and the top electrode to form ferroelectric hafnium HfO2 of the FeRAM memory structure,
wherein annealing the first HfO2 layer, the second HfO2 layer, the HfN layer, and the top electrode includes performing a rapid thermal annealing process at a temperature between 750 and 1100° C.