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Resist-Free Directed Self-Assembly Chemo-Epitaxy Approach for Line/Space Patterning.

ABSTRACT: This work reports a novel, simple, and resist-free chemo-epitaxy process permitting the directed self-assembly (DSA) of lamella polystyrene-block-polymethylmethacrylate (PS-b-PMMA) block copolymers (BCPs) on a 300 mm wafer. 193i lithography is used to manufacture topographical guiding silicon oxide line/space patterns. The critical dimension (CD) of the silicon oxide line obtained can be easily trimmed by means of wet or dry etching: it allows a good control of the CD that permits finely tuning the guideline and the background dimensions. The chemical pattern that permits the DSA of the BCP is formed by a polystyrene (PS) guide and brush layers obtained with the grafting of the neutral layer polystyrene-random-polymethylmethacrylate (PS-r-PMMA). Moreover, data regarding the line edge roughness (LER) and line width roughness (LWR) are discussed with reference to the literature and to the stringent requirements of semiconductor technology.

SUBMITTER: Giammaria TJ

PROVIDER: S-EPMC7762273 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

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Resist-Free Directed Self-Assembly Chemo-Epitaxy Approach for Line/Space Patterning.

Giammaria Tommaso Jacopo TJ Gharbi Ahmed A Paquet Anne A Nealey Paul P Tiron Raluca R

Nanomaterials (Basel, Switzerland) 20201207 12

This work reports a novel, simple, and resist-free chemo-epitaxy process permitting the directed self-assembly (DSA) of lamella polystyrene-block-polymethylmethacrylate (PS-<i>b</i>-PMMA) block copolymers (BCPs) on a 300 mm wafer. 193i lithography is used to manufacture topographical guiding silicon oxide line/space patterns. The critical dimension (CD) of the silicon oxide line obtained can be easily trimmed by means of wet or dry etching: it allows a good control of the CD that permits finely ...[more]

PMID: 33297348

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