Patent ID: 6277550
Filing Date: 2001-08-21
Classification: G03C

Abstract:
Photosensitive silver halide emulsion containing tabular silver halide grains present in a numerical amount of at least 50%, said tabular grains having an average aspect ratio of at least 1.2, an average equivalent circular grain diameter of at least 0.1 um and an average grain thickness of less than 0.3 .mu.m characterized in that said grains further include an organic hole trapping dopant, and the organic hole trapping dopant has a formula (I) as follows: ##STR7##whereinX and Y each independently represents O, S or Se;R.sup.1 and R.sup.2 each independently represents hydrogen, an alkyl, an aryl, an aralkyl, a heteroaryl;wherein R.sup.1 and R.sup.2 can be the same or different and may form a ring;E represents a group linked to the carbon atom by a heteroatom, having at least one free electron pair;M.sup.+ is a proton or a counterion; andwherein m equals 1 and n equals 1 or 2.