Aromatic novolak resins
US5571886A · kind A · utility
11Cited by
12References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 21, 1994 |
| Grant date | Nov 5, 1996 |
| Priority date | — |
| Expiry date | Mar 21, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/0048
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An essentially aromatic alkali soluble novolak resin comprising the product resulting from the acid condensation of an aromatic aldehyde and a phenol where the resin has a molecular weight in excess of 1500 and a glass transition temperature in excess of 125.degree. C. If desired, the aromatic novolak resin may be blended with a conventional novolak resin to regulate the glass transition temperature of the resin. The aromatic novolak resin and blends formed therefrom are especially suitable as coating resins and are useful for the formation of photoresist coating compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.