Hydrogen atom donor compounds as contrast enhancers for black-and-white photothermographic and thermographic elements
US5637449A · kind A · utility
17Cited by
33References
25Claims
0Family size
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Key dates
| Filing date | Sep 19, 1995 |
| Grant date | Jun 10, 1997 |
| Priority date | — |
| Expiry date | Sep 19, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/49836
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Hydrogen atom donor compounds are useful as contrast enhancers when used in combination with (i) hindered phenol developers, and (ii) trityl hydrazide and/or formyl-phenyl hydrazine co-developers, to produce ultra-high contrast black-and-white photothermographic and thermographic elements. The photothermographic and thermographic elements may be used as a photomask in a process where there is a subsequent exposure of an ultraviolet or short wavelength visible radiation-sensitive imageable medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.