Barrier coating compositions containing fluorine and methods of forming photoresist patterns using such compositions
US7468235B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2006 |
| Grant date | Dec 23, 2008 |
| Priority date | — |
| Expiry date | Sep 20, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/115
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided are a barrier coating composition and a method of forming photoresist pattern by an immersion photolithography process using the same. The barrier coating composition includes a polymer corresponding to formula I having a weight average molecular weight (Mw) of 5,000 to 100,000 daltons and an organic solvent,wherein the expressions 1+m+n=1; 0.1≦1/(1+m+n)≦0.7; 0.3≦m/(1+m+n)≦0.9; and 0.0≦n/(1+m+n)≦0.6 are satisfied; Rf is a C1 to C5 fluorine-substituted hydrocarbon group; and Z, if present, includes at least one hydrophilic group. Compositions according to the invention may be used to form barrier layers on photoresist layers to suppress dissolution of photoresist components during immersion photolithography while allowing the barrier layer to be removed by alkaline developing solutions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.