# US 5,348,848 A · Method of manufacturing silver halide photographic emulsion and silver halide photographic light-sensitive material comprising the silver halide photographic emulsion

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- Number: US 5,348,848 A
- Document ID: US5348848A
- Status: Granted
- Kind: A
- Application number: 08/037,236
- Filed: 1993-03-26
- Granted: 1994-09-20
- Earliest claimed: 1992-04-03
- Assignees: Konica Corporation
- Inventors: Shuji Murakami; Shigeo Tanaka
- Web page: https://patentgrep.com/patent/US5348848A

## CPC

- G03C 1/08: Sensitivity-increasing substances
- G03C 1/09: Noble metals or mercury; Salts or compounds thereof; Sulfur, selenium or tellurium, or compounds thereof, e.g. for chemical sensitising (G03C1/34, G03C1/35 take precedence)
- G03C 2001/03517: {Chloride content}
- G03C 2001/0854: {Indium}
- G03C: PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES (for photomechanical purposes G03F); PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY (photographic processes characterised by the use or manipulation of apparatus classifiable per se in subclass G03B, see G03B; photomechanical production of textured or patterned surfaces G03F; electrophotography, magnetography G03G)

## Abstract

A silver halide photographic light-sensitive material comprising a support and provided thereon, a silver halide emulsion layer comprising silver halide grains containing at least one substance selected from the group consisting gallium, germanium, indium, thallium and compounds thereof.

## Claims

### Claim 1

A silver halide photographic light-sensitive material comprising a support and provided thereon, a silver halide emulsion layer comprising sliver halide grains containing silver bromochloride having a silver chloride content of 95 mol % or more and wherein said grains contain at least one substance selected from the group consisting of gallium, germanium, and compounds thereof.

### Claim 2 (depends on 1)

The material of claim 1, wherein 60% or more of the silver halide grains in the emulsion layer contain at least one substance selected from the group consisting of gallium, germanium, and compounds thereof.

### Claim 3 (depends on 1)

The material of claim 1, wherein 80% or more of the silver halide grains in the emulsion layer contain at least one substance selected from the group consisting of gallium, germanium, and compounds thereof.

### Claim 4 (depends on 1)

The material of claim 1, wherein the grains contain a phase having a silver bromide content of 10 to 90 mol %.

### Claim 5 (depends on 1)

The material of claim 1, wherein the grains contain 10.sup.-9 to 10.sup.-3 mol of the substance per mol of silver.

### Claim 6 (depends on 1)

The material of claim 1, wherein the grains contain 10.sup.-9 to 10.sup.-3 mol of gallium or a compound thereof per mol of silver.

### Claim 7

A silver halide photographic light-sensitive material comprising a support and provided thereon, a silver halide emulsion layer comprising silver halide grains containing 10.sup.-9 to 10.sup.-3 mol of germanium or a compound thereof per mol of silver.

### Claim 8 (depends on 7)

The material of claim 7, wherein the grains comprise silver bromochloride having a silver halide content of 95 mol % or more.

### Claim 9 (depends on 7)

The material of claim 7, wherein 60% or more of the silver halide grains in the emulsion layer contain germanium or a compound thereof.

### Claim 10 (depends on 9)

The material of claim 9, wherein the grains contain a phase having a silver bromide content of 10 to 90 mol %.

### Claim 11

A method for manufacturing a silver halide photographic light-sensitive material comprising a support and provided thereon, a silver halide emulsion layer comprising silver bromochloride grains having a silver chloride content of 95 mol % or more, comprising the step of forming the grains in the presence of at least one substance selected from the group consisting of gallium, germanium and compounds thereof.

### Claim 12 (depends on 11)

The method of claim 11, wherein the grains are formed in the presence of 10.sup.-9 to 10.sup.-3 mol of the substance per mol of silver halide.

### Claim 13 (depends on 11)

The method of claim 11, further comprising the step of conducting sulfur sensitization and gold sensitization of the grains.

### Claim 14 (depends on 11)

The method of claim 11, wherein the grains are formed in the presence of an iron salt or an iridium salt.

### Claim 15

A method for manufacturing a silver halide photographic light-sensitive material comprising a support and provided thereon, a silver halide emulsion layer containing silver halide grains, comprising the step of forming the grains in the presence of 10.sup.-9 to 10.sup.-3 mol of germanium or a compound there per mold of silver halide.

### Claim 16 (depends on 15)

The method of claim 15, further comprising the step of conducting sulfur sensitization and gold sensitization of the grains.