Maro Publications

Patterns

Patent Abstracts

*7/30/2013 
from 4/5/2013

Maro Topics

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Patent Abstracts

Cheng et al of International BusinessMachines (IBM), Armonk, Neew York, USA, oriented microphase-separated domains with an orientation control component, and a block copolymer in which the control is immiscible with one of the blocks. An orientation control layer can present a neutral or a non-neutral surface to block copolymers. The orientation control layer can have a surface that is preferentially wetted by a particular block of the block copolymer; such a surface is considered not to be neutral. The surface of neutral orientation control layer is wettable by more than one block in the block copolymer. Therefore, on a neutral orientation control layer, the cylinder-forming and lamellae-forming block copolymer form laterally microphase-separate domains which orient perpendicularly to the neutral orientation control layer. Typical neutral orientation control layers have been prepared by casting a film of a random copolymer comprising the monomers of each block. For example, a neutral orientation control layer for the poly(styrene-b-methyl methacrylate) diblock copolymer can be made from a random copolymer of styrene and methylmethacrylate. [Patterning, US Patent 8,491,965 (7/23/2013)]

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Interested!!
Bookmark this page to follow future developments!.
(RDC 6/5/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

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Copyright 2013 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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** Date of latest addition; date of first entry is 4/5/2013.