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Silver halide photographic emulsion

  • US 6,632,595 B2
  • Filed: 03/12/2002
  • Issued: 10/14/2003
  • Est. Priority Date: 03/13/2001
  • Status: Active Grant
First Claim
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1. A silver halide photographic emulsion comprising grains, wherein 50% or more (numerical ratio) of all the grains are occupied by tabular grains each meeting the requirements (i) to (iii) below:

  • (i) a silver iodobromide or silver iodochlorobromide tabular grain having (111) faces as main planes and having two parallel twin planes;

    (ii) a thickness of 0.12 μ

    m or less; and

    (iii) the tabular grains each have a grain fringe portion meeting the following requirements (a) and (b), the grain fringe portion being a grain peripheral portion extending from a grain side defining edge to an inside as much as a length corresponding to a grain thickness, when viewed in a direction perpendicular to the main planes;

    (a) the grain fringe portion has a phase of high silver iodide content in either one of an upper region and a lower region than a region sandwiched between the two twin planes, and (b) “

    A”

    , which represents the maximum local silver iodide content (mol %) in the phase of high silver iodide content, satisfies the relationship;

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