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

Claim 8:
9. A system configured to form ferroelectric hafnium oxide (HfO2) on a substrate of a ferroelectric random access memory (Fe RAM) memory structure, in a processing chamber, the system comprising:
a gas delivery system configured to supply gases to the processing chamber;
a radio frequency (RF) generating system configured to generate plasma within the processing chamber; and
a controller configured to, by controlling the gas delivery system and the RF generating system,
deposit a first HfO2 layer on the substrate,
deposit a hafnium nitride (HfN) layer on the first HfO2 layer,
deposit a second HfO2 layer on the HfN layer, the second HfO2 layer having the same material as the first HfO2 layer,
deposit a top electrode on the second HfO2 layer; and
anneal the first HfO2 layer, the second HfO2 layer, the HfN layer, and the top electrode to form ferroelectric hafnium HfO2 of the Fe RAM memory structure,

wherein annealing the first HfO2 layer, the second HfO2 layer, the HfN layer, and the top electrode to form ferroelectric hafnium HfO2 includes performing a rapid thermal annealing process at a temperature between 750 and 1100° C.