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Sub-10-nm patterning via directed self-assembly of block copolymer films with a vapour-phase deposited topcoat

Journal Article · · Nature Nanotechnology
 [1];  [2];  [2];  [1];  [3];  [3];  [2];  [1]
  1. Univ. of Chicago, Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)

Directed self-assembly (DSA) of the domain structure in block copolymer (BCP) thin films is a promising approach for sub-10-nm surface patterning. DSA requires the control of interfacial properties on both interfaces of a BCP film to induce the formation of domains that traverse the entire film with a perpendicular orientation. Here we show a methodology to control the interfacial properties of BCP films that uses a polymer topcoat deposited by initiated chemical vapour deposition (iCVD). The iCVD topcoat forms a crosslinked network that grafts to and immobilizes BCP chains to create an interface that is equally attractive to both blocks of the underlying copolymer. The topcoat, in conjunction with a chemically patterned substrate, directs the assembly of the grating structures in BCP films with a half-pitch dimension of 9.3 nm. As the iCVD topcoat can be as thin as 7 nm, it is amenable to pattern transfer without removal. As a result, the ease of vapour-phase deposition, applicability to high-resolution BCP systems and integration with pattern-transfer schemes are attractive properties of iCVD topcoats for industrial applications.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Materials Sciences and Engineering Division; National Science Foundation (NSF); U.S. Army Research Laboratory - U.S. Army Research Office (ARO)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1373307
Journal Information:
Nature Nanotechnology, Journal Name: Nature Nanotechnology Journal Issue: 6 Vol. 12; ISSN 1748-3387
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Realization of wafer-scale nanogratings with sub-50 nm period through vacancy epitaxy journal June 2019
Ultra-dense (~20 Tdot/in2) nanoparticle array from an ordered supramolecular dendrimer containing a metal precursor journal March 2019
Identifying the nature of surface chemical modification for directed self-assembly of block copolymers journal September 2017
Thermodynamic and Kinetic Tuning of Block Copolymer Based on Random Copolymerization for High-Quality Sub-6 nm Pattern Formation journal May 2018
Sub‐5 nm Dendrimer Directed Self‐Assembly with Large‐Area Uniform Alignment by Graphoepitaxy journal March 2019
Smart Nanostructured Materials based on Self‐Assembly of Block Copolymers journal June 2019
Direct In Situ Observation of the Early‐Stage Disorder–Order Evolution of Perpendicular Lamellae in Thermally Annealed High‐χ Block Copolymer Thin Films journal April 2019
Janus Graft Block Copolymers: Design of a Polymer Architecture for Independently Tuned Nanostructures and Polymer Properties journal May 2018
Janus Graft Block Copolymers: Design of a Polymer Architecture for Independently Tuned Nanostructures and Polymer Properties journal May 2018
Hydrogen Bond Induces Hierarchical Self-Assembly in Liquid-Crystalline Block Copolymers journal February 2018
Thermal Approaches to Perpendicular Block Copolymer Microdomains in Thin Films: A Review and Appraisal journal November 2018
High‐Fidelity, Sub‐5 nm Patterns from High‐χ Block Copolymer Films with Vapor‐Deposited Ultrathin, Cross‐Linked Surface‐Modification Layers journal January 2020
High‐Fidelity, Sub‐5 nm Patterns from High‐χ Block Copolymer Films with Vapor‐Deposited Ultrathin, Cross‐Linked Surface‐Modification Layers journal February 2020
Homopolymer Nanolithography journal July 2017
Directed Self-Assembly of Templatable Block Copolymers by Easily Accessible Magnetic Control journal January 2019
Metal Oxide Heterostructure Array via Spatially Controlled–Growth within Block Copolymer Templates journal October 2019
Promising Lithography Techniques for Next-Generation Logic Devices journal April 2018
Directed self-assembly of block copolymers for 7 nanometre FinFET technology and beyond journal October 2018
Extreme ultraviolet resist materials for sub-7 nm patterning journal January 2017
Magnetization switching in high-density magnetic nanodots by a fine-tune sputtering process on a large-area diblock copolymer mask journal January 2017
Long-range single domain array of a 5 nm pattern of supramolecules via solvent annealing in a double-sandwich cell journal January 2018
Polymer–metal coating for high contrast SEM cross sections at the deep nanoscale journal January 2018
Self-assembly of a silicon-containing side-chain liquid crystalline block copolymer in bulk and in thin films: kinetic pathway of a cylinder to sphere transition journal January 2019
Reactive block copolymers for patterned surface immobilization with sub-30 nm spacing journal January 2019
Nano-confinement of block copolymers in high accuracy topographical guiding patterns: modelling the emergence of defectivity due to incommensurability journal January 2018
Sub-5 nm structured films by hydrogen bonded siloxane liquid crystals and block copolymers journal January 2018
Customizing topographical templates for aperiodic nanostructures of block copolymers via inverse design journal January 2019
Enhanced microphase separation of thin films of low molecular weight block copolymer by the addition of an ionic liquid journal January 2019
Scattering-mediated absorption from heterogeneous nanoparticle assemblies in diblock copolymer micelles for SERS enhancement journal January 2019
Research Update: Electron beam-based metrology after CMOS journal July 2018
Dissipative particle dynamics for directed self-assembly of block copolymers journal October 2019
Size-dependent single electron transfer and semi-metal-to-insulator transitions in molecular metal oxide electronics journal May 2018
Thermal stability of L1 0 -FePt nanodots patterned by self-assembled block copolymer lithography journal September 2018
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X-ray characterization of contact holes for block copolymer lithography text January 2019
PMMA-Assisted Plasma Patterning of Graphene journal August 2018
Polarization-insensitive, ultra-broadband, and compact metamaterial-inspired optical absorber via wide-angle and highly efficient performances journal January 2018
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Reactive block copolymers for patterned surface immobilization with sub-30 nm spacing text January 2019

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