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  4. Combination of Thermal Scanning Probe Lithography and Directed Self-Assembly of Block Copolymers
 
conference paper

Combination of Thermal Scanning Probe Lithography and Directed Self-Assembly of Block Copolymers

Uranga-Granados, Iker
•
Erbas, Berke  
•
Torres-Vila, Pol  
Show more
Ruiz, Ricardo
•
Farrell, Richard A.
2025
Novel Patterning Technologies 2025
SPIE Advanced Lithography + Patterning (2025)

The fabrication of semiconductor quantum devices necessitates sub-20 nm features and high-density patterning, often exceeding the capabilities of current state-of-the-art lithographic techniques. To address this challenge, in this work, the combination of top-down thermal scanning probe lithography (t-SPL) and pattern transfer with bottom-up directed self-assembly (DSA) of block copolymers (BCP) is presented as a new lithography process suitable for quantum device fabrication. Nanohole arrays of varying shapes and sizes were patterned into SiO2 using a combination of t-SPL and reactive ion etching (RIE) for 5x depth-amplified pattern transfer. These arrays served as guiding patterns, inducing three distinct orderings of block copolymers (BCP): pattern hole shrink (PHS), pattern hole doubling (PHD), and high-pitched PHD. SEM images have been analyzed by image processing to determine guiding pattern/DSA pattern placement accuracy. It has been determined that the guiding pattern/DSA offset is sub-10 nm, so it does not hinder the pattern placement control lent by t-SPL. This combined t-SPL/DSA lithography process, capable of creating complex, high-resolution patterns with precise placement, holds a significant promise for fabricating advanced quantum devices.

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Type
conference paper
DOI
10.1117/12.3050036
Scopus ID

2-s2.0-105007411586

Author(s)
Uranga-Granados, Iker

CSIC - Instituto de Microelectronica de Barcelona (IMB-CNM)

Erbas, Berke  

École Polytechnique Fédérale de Lausanne

Torres-Vila, Pol  

École Polytechnique Fédérale de Lausanne

Bertsch, Arnaud  

École Polytechnique Fédérale de Lausanne

Llobet, Jordi

CSIC - Instituto de Microelectronica de Barcelona (IMB-CNM)

Bausells, Joan

CSIC - Instituto de Microelectronica de Barcelona (IMB-CNM)

Pérez-Murano, Francesc

CSIC - Instituto de Microelectronica de Barcelona (IMB-CNM)

Brugger, Juergen  

École Polytechnique Fédérale de Lausanne

Fernández-Regúlez, Marta

CSIC - Instituto de Microelectronica de Barcelona (IMB-CNM)

Editors
Ruiz, Ricardo
•
Farrell, Richard A.
Date Issued

2025

Publisher

SPIE

Published in
Novel Patterning Technologies 2025
ISBN of the book

9781510686403

9781510686410

Series title/Series vol.

Proceedings of SPIE; 13427

ISSN (of the series)

0277-786X

1996-756X

Article Number

134270P

Subjects

advanced nanolithography

•

directed self-assembly of block copolymers

•

overlay alignment

•

quantum device fabrication

•

thermal scanning probe lithography

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMIS1  
Event nameEvent acronymEvent placeEvent date
SPIE Advanced Lithography + Patterning (2025)

San Jose, United States

2025-02-22 - 2025-02-27

Available on Infoscience
June 16, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/251315
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