Method for reducing silicide defects in integrated circuits

A method for forming silicide contacts in integrated circuits (ICs) is described. A spacer pull-back etch is performed during the salicidation process to reduce the stress between the spacer and source/drain silicide contact at the spacer undercut. This prevents the propagation of surface defects in...

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Bibliographische Detailangaben
Hauptverfasser: Ye, Jeff Jianhui, Liu, Huang, See, Alex K H, Lu, Wei, Cong, Hai, Koh, Hui Peng, Zhou, Mei Sheng, Hsia, Liang Choo
Format: Patent
Sprache:eng
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Zusammenfassung:A method for forming silicide contacts in integrated circuits (ICs) is described. A spacer pull-back etch is performed during the salicidation process to reduce the stress between the spacer and source/drain silicide contact at the spacer undercut. This prevents the propagation of surface defects into the substrate, thereby minimizing the occurrence of silicide pipe defects. The spacer pull-back etch can be performed after a first annealing step to form the silicide contacts.