22 March 2016 Shape optimization for DSA
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Directed self-assembly using block copolymers for positioning vertical interconnect access in integrated circuits relies on the proper shape of a confined domain in which polymers will self-assemble into the targeted design. Finding that shape, i.e., solving the inverse problem, is currently mainly based on trial and error approaches. We introduce a level-set based algorithm that makes use of a shape optimization strategy coupled with self-consistent field theory to solve the inverse problem in an automated way. It is shown that optimal shapes are found for different targeted topologies with accurate placement and distances between the different components.
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Gaddiel Ouaknin, Gaddiel Ouaknin, Nabil Laachi, Nabil Laachi, Kris Delaney, Kris Delaney, Glenn Fredrickson, Glenn Fredrickson, Frederic Gibou, Frederic Gibou, "Shape optimization for DSA", Proc. SPIE 9777, Alternative Lithographic Technologies VIII, 97770Y (22 March 2016); doi: 10.1117/12.2218515; https://doi.org/10.1117/12.2218515

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