Processes and compositions for photogeneration of acid
US5401607A · kind A · utility
50Cited by
43References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1993 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Jun 29, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/346
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An infra-red sensitive acid-generating medium comprises a binder, an iodonium salt; and a squarylium dye capable of absorbing infra-red radiation having a wavelength within the range of about 700 to about 1200 nm, the dye having a squarylium ring the 1- and 3-positions of which are each connected, via a single sp.sup.2 carbon atom, to a pyrylium, thiopyrylium, benzpyrylium or benzthiopyrylium nucleus, at least one of the sp.sup.2 carbon atoms having a hydrogen atom attached thereto, and the 2-position of the squarylium ring bearing an O.sup.-, amino or substituted amino, or sulfonamido group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.