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Whitepaper: Self-Aligned Block and Fully Self-Aligned Via for iN5 Metal 2 Self-Aligned Quadruple Patterning

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This paper assesses Self-Aligned Block (SAB) and Fully Self-Aligned Via (FSAV) approaches to patterning using a iN5 (imec node 5 nm) vehicle and Metal 2 Self-Aligned Quadruple Patterning. We analyze SAB printability in the lithography process using process optimization, and demonstrate the effect of SAB on patterning yield for a (8 M2 lines x 6 M1 lines x 6 Via) structure. We show that FSAV, compared to standard Via patterning, has no beneficial impact but prevents dielectric breakdown between two adjacent M1 lines.

Benjamin Vincent, Joern-Holger Franke, Aurelie Juncker, Frederic Lazzarino, Gayle Murdoch, Sandip Halder, Joseph Ervin

https://doi.org/10.1117/12.2298761

© 2018 Society of Photo Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, or modification of the contents of the publication are prohibited.

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