Silver halide photographic emulsion and silver halide photographic lightsensitive material using the same
US6720134B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2002 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Jan 14, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/40
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A silver halide photographic emulsion comprising grains, wherein 70% or more of the total projected area of the grains is occupied by silver halide grains each meeting requirements (a) to (d) below(a) the grain is composed of a tabular silver halide host grain having two mutually parallel main planes and aspect ratio of 2 or more, and a silver halide protrusion portion epitaxially junctioned on the surface of the host grain;(b) the silver bromide contents of both the host grain and the protrusion portion are 70 mol % or more;(c) the percentage of the silver amount in the protrusion is 12% or less of the silver amount in the host grain; and(d) the grain has a shallow electron-trapping zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.