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• W2001863776 abstract "In order to evaluate process performances of directed self-assembly (DSA) lithography for semiconductor device manufacturing, we developed a novel simple sub-15 nm line-and-space (L/S) patterning process using polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) lamellar block copolymer (BCP). The new process with grapho- and chemo-hybrid coordinated line epitaxy, using trimming resist and shallow etching spin-on-glass (SOG) as pinning guide, requires neither special pinning guide materials to control surface free energy on guideline patterns nor any resist strip process after guideline pattern fabrication. In this process, insolubility and thermal resistance of pinning guide are provided by shallow SOG etching deposition residue consisting of SOG-occurring Si and CF4 gas-occurring CF compound. By optimization of guide resist critical dimension (CD) and resist film thickness, the half-pitch (HP) 15 nm L/S patterns after dry development were fabricated with the maximum dose margin of approximately 15%. The HP 15 nm L/S DSA patterning after SOG full etching was demonstrated on 300 mm wafer with 85 chips. The presence of characteristic 3-dimensional (3D) BCP internal defects related to PS short defects was suggested by observation at SOG half-depth etching condition, and defects could be minimized by optimization of neutral layer (NL) material and sufficient phase-separation annealing. The 15 nm PS line patterns were transferred to SOG and spin-on-carbon (SOC) stacked substrate." @default.
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• W2001863776 date "2015-02-01" @default.
• W2001863776 modified "2023-09-25" @default.
• W2001863776 title "A novel simple sub-15nm line-and-space patterning process flow using directed self-assembly technology" @default.
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• W2001863776 doi "https://doi.org/10.1016/j.mee.2015.01.031" @default.
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