Silver halide photographic emulsion and silver halide photographic light-sensitive material containing the emulsion
US6555307B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 1998 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Dec 22, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2001/0357
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A silver halide photographic emulsion in which tabular grains each having an equivalent-circle diameter of 0.6 &mgr;m or more, a thickness of 0.3 &mgr;m or less, and an aspect ratio of 2 or more account for 70% or more in number of all the grains contained therein, wherein each of the tabular grains has a multilayered structure including two or more layers, at least one of the layers contains 1 to 20 mol % of a chloride with respect to the silver amount contained in the at least one of the layers, and each of the tabular grains contains a metal complex represented by formula (C-1) or (C-2) below:[M1(CN)6-aLa]n  (C-1) [M2(CN)4-bLb]m  (C-2) wherein M1 represents Fe, Ru, Re, Os, Ir, or Pt; M2 represents Pt or Au; L represents a ligand except for CN; a represents 0, 1, or 2; b represents 0, 1, or 2; n represents 2-, 3-, or 4-; and m represents 1- or 2-.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.