The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 2026
Filed:
Jun. 04, 2021
Nissan Chemical Corporation, Tokyo, JP;
NISSAN CHEMICAL CORPORATION, Tokyo, JP;
Abstract
An upper layer film-forming composition exhibits good solubility in hydrophobic solvents and can bring about vertical alignment of a block copolymer without dissolution, swelling or the like of a layer containing the block copolymer formed on a substrate. This upper layer film-forming composition is used for phase separation of a layer containing a block copolymer formed on a substrate, and contains: (A) a copolymer containing a unit structure derived from a maleimide structure (a) and a unit structure derived from a styrene structure; and (B) as a solvent, a non-aromatic hydrocarbon compound that is a liquid at normal temperature and pressure.
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