Material characterization for advanced Si LSI process technology by means of positron annihilation

16th International Conference on Positron Annihilation

Uedono, A.^1 ; Oshima, N.^2 ; Ohdaira, T.^2 ; Suzuki, R.^2 ; Ishibashi, S.^3

Division of Applied Physics, Faculty of Pure and Applied Science, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan^1

Research Institute of Instrumentation Frontier, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan^2

Nanosystem Research Institute (NRI) RICS, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan^3

关键词: Defects and impurities;    Gas cluster ions;    Material characterizations;    Monoenergetic positron beam;    Optimization of process parameters;    Process Technologies;    Vacancy complexes;    Vacancy-type defects;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/443/1/012067/pdf
DOI  :  10.1088/1742-6596/443/1/012067

来源: IOP

【 摘 要 】

Vacancy-type defects in gas cluster ion implanted Si and electroless deposited Cu were studied by monoenergetic positron beams. For Ar gas cluster ion implanted Si, we found that the vacancy-rich region was localized at a depth of 0-13 nm. Two different defect species were found to coexist in the damaged region, and they were identified as divacancy-type defects and vacancy clusters filled with Ar. For electroless deposited Cu films, the major defect species were identified as vacancy complexes (V3-V4) and larger vacancy clusters (∼V10). Annealing behaviours of the defects and the relation between the defects and impurities were also discussed. We have demonstrated the efficacy of positron annihilation to aid in the optimization of process parameters for advanced Si LSI processes.