Block copolymer
US10308752B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2017 |
| Grant date | Jun 4, 2019 |
| Priority date | — |
| Expiry date | Jun 28, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB81C2201/0149
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A block copolymer includes a polystyrene block including a styrene unit, and a polyalkyl (meth)acrylate block including an alkyl (meth)acrylate unit. The block copolymer includes an organic group that is bound to at least one end of a main chain of the block copolymer and that comprises a hetero atom. A polymerization initiation end of the block copolymer includes a structure derived from an alkyl lithium. The organic group included in the block copolymer includes a nitrogen atom, a sulfur atom, a phosphorus atom, a tin atom, or a combination thereof, or is represented by formula (1). R1 represents a single bond or a divalent organic group having 1 to 30 carbon atoms; and R2 represents a hydrogen atom, an aliphatic linear hydrocarbon group having 1 to 30 carbon atoms, an alicyclic hydrocarbon group having 3 to 30 carbon atoms, or the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.