| abstract |
A layered superlattice material precursor is applied to a substrate (102). The precursor coating is rapid thermal processed (RTP) with a ramping rate of 100 °C/second at a hold temperature in a range of from 500 °C to 900 °C for a cumulative heating time not exceeding 30 minutes, and preferably less than 5 minutes. In fabricating a ferroelectric memory cell (100), the coating is heated in oxygen using RTP, then a top electrode layer (128) is formed, and then the substrate including the coating is heated using RTP in oxygen or in nonreactive gas after forming the top electrode layer. The thin film (126) preferably has a thickness in a range of from 25 nm to 120 nm. The process typically has a thermal budget value not exceeding 960,000 °C-sec, preferably less than 50,000 °C-sec. |