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Proceedings Paper

Lithographically directed materials assembly
Author(s): Richard P. Kingsborough; Russell B. Goodman; Keith Krohn; Theodore H. Fedynyshyn
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Paper Abstract

We have developed a processing method that significantly reduces the number of steps necessary to yield a surface that directs block copolymer assembly. This methodology employs a single resistless lithography step that directly changes the surface energy without requiring subsequent material deposition or plasma etching steps. The lithographically defined difference in surface energies acts as a template to direct diblock polymer self-assembly into low-defect periodic structures. Our newly developed lithographically directed self-assembly technique can produce sub-45 nm half pitch lines employing poly(styrene-b-methyl methacrylate) (PS-b-PMMA) and interference lithography. Once assembled into periodic lines of alternating materials, the PMMA block can be removed and the resulting polystyrene features can be used as an etch mask to transfer periodic lines-and-spaces into a silicon substrate.

Paper Details

Date Published: 17 March 2009
PDF: 10 pages
Proc. SPIE 7271, Alternative Lithographic Technologies, 72712D (17 March 2009); doi: 10.1117/12.814625
Show Author Affiliations
Richard P. Kingsborough, MIT Lincoln Lab. (United States)
Russell B. Goodman, MIT Lincoln Lab. (United States)
Keith Krohn, MIT Lincoln Lab. (United States)
Theodore H. Fedynyshyn, MIT Lincoln Lab. (United States)


Published in SPIE Proceedings Vol. 7271:
Alternative Lithographic Technologies
Frank M. Schellenberg; Bruno M. La Fontaine, Editor(s)

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