Non-doped HfO2 crystallization controlled by dwell time in laser annealing

被引:7
作者
Tabata, Toshiyuki [1 ]
Halty, Sebastien [1 ]
Roze, Fabien [1 ]
Huet, Karim [1 ]
Mazzamuto, Fulvio [1 ]
机构
[1] Laser Syst & Solut Europe LASSE, 145 Rue Caboeufs, F-92230 Gennevilliers, France
关键词
laser anneal; hafnium oxide; high-k; ferroelectric; OPTICAL-PROPERTIES; THIN-FILMS;
D O I
10.35848/1882-0786/ac2c18
中图分类号
O59 [应用物理学];
学科分类号
摘要
Laser annealing is performed to crystallize a 10 nm thick non-doped hafnium dioxide (HfO2) thin film. The influence of the laser annealing dwell time on the crystallization process is investigated considering the Gibbs free energy diagram of various HfO2 phases (i.e. monoclinic, cubic, tetragonal, and orthorhombic). Progressive phase transformations as a function of the dwell time are evidenced and discussed. Furthermore, for the sample showing ferroelectricity, the endurance property is much improved compared to the previously reported ferroelectric non-doped HfO2.
引用
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页数:6
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