Styrene-anhydride copolymer containing amido group, the process for producing the same and use thereof
US6649321B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2001 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Apr 26, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/111
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a novel styrene-anhydride copolymer containing amido group, which comprises the following repeating units (I) and (II): whereinR represents a residue of (meth)acrylate monomer containing hydroxyl group;R1 and R2 are the same or different and each represents a C1-6 alkyl group, or R1 and R2 are taken together with the nitrogen atom to which they attach to form a 5- to 6-member heterocyclic group containing nitrogen.The present invention also relates to process for producing the above copolymer and to the use of the copolymer as a photo resist in an alkaline soluble development of an irradiative reaction and as a solder resistant photo resist in printed circuit boards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.