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Related Experiment Videos

Positive microcontact printing.

Emmanuel Delamarche1, Matthias Geissler, Heiko Wolf

  • 1IBM Research, Zurich Research Laboratory, 8803 Rüschlikon, Switzerland. emd@zurich.ibm.com

Journal of the American Chemical Society
|April 11, 2002
PubMed
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Microcontact printing alkanethiols creates self-assembled monolayers on gold or copper, protecting surfaces from etching. This technique offers a versatile lithographic method adaptable for both negative and positive patterning processes.

Area of Science:

  • Materials Science
  • Surface Chemistry
  • Nanotechnology

Background:

  • Self-assembled monolayers (SAMs) are crucial for surface modification.
  • Wet etching is a common substrate processing technique.
  • Lithography enables precise patterning of surfaces.

Purpose of the Study:

  • To investigate microcontact printing of alkanethiols for substrate protection.
  • To explore the adaptability of this technique for lithographic patterning.
  • To demonstrate both negative and positive lithography modes.

Main Methods:

  • Microcontact printing of alkanethiols onto gold (Au) and copper (Cu) substrates.
  • Formation of self-assembled monolayers (SAMs).
  • Utilizing oligothiols to invert the lithographic process.

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Main Results:

  • Alkanethiol SAMs effectively protected the substrate from wet etching.
  • The technique demonstrated capabilities for negative-tone lithography.
  • Inversion to a positive-tone process was achieved using specific oligothiols.

Conclusions:

  • Microcontact printing of alkanethiols is a viable method for selective substrate protection.
  • This approach provides a flexible lithographic platform.
  • The technique can be tuned for both negative and positive lithographic outcomes.