Diazo based imaging element having improved resistance against physical damage
US5663031A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1996 |
| Grant date | Sep 2, 1997 |
| Priority date | — |
| Expiry date | Jan 29, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/11
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides an imaging element comprising on a support in the order given a coated composition of at least two hydrophilic layers being in water permeable contact with each other and each containing a hydrophilic (co)polymer or (co)polymer mixture and having been hardened with a hydrolyzed tetraalkyl orthosilicate and a light sensitive layer containing a diazo resin or a diazonium salt characterized in that the ratio by weight in the top layer of said package of said hydrophilic (co)polymer or (co)polymer mixture versus said hydrolyzed tetraalkyl orthosilicate (expressed as silicon dioxide) is at least 1.1 and the ratio by weight in an underlying layer of said package of said hydrophilic (co)polymer or (co)polymer mixture versus said hydrolyzed tetraalkyl orthosilicate (expressed as silicon dioxide) is not higher than 0.9.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.