Chemically amplified resist composition
US6280903A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2000 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Jul 17, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/0045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Copolymers and terpolymers are used in chemically amplified resists. The terpolymers are of the formula: ##STR1## wherein R.sub.3 is selected from the group consisting of hydrogen and a C.sub.1 to C.sub.10 aliphatic hydrocarbon, wherein said aliphatic hydrocarbon contains substituents selected from the group consisting of hydrogen, hydroxy, carboxylic acid, carboxylic anhydride, and combinations thereof. R.sub.4 is selected from the group consisting of hydrogen and a C.sub.1 to C.sub.10 aliphatic hydrocarbon, wherein said aliphatic hydrocarbon contains substituents selected from the group consisting of hydrogen, hydroxy, carboxylic acid, carboxylic anhydride, and combinations thereof; R.sub.5 is selected from the group consisting of hydrogen and methyl; R.sub.6 is selected from the group consisting of t-butyl and tetrahydropyranyl; M and n are each integers; and wherein n/(m+n) ranges from about 0.1 to about 0.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.