Photosensitive material and laser marking method

Details Photosensitive material and laser marking method Photosensitive material and laser marking method

2005-04-05

2005-04-05

Pham, Hai (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

Reexamination Certificate

active

06876377

ABSTRACT:
A photosensitive material in which a fog unnecessary for a photosensitive material is not generated when irradiation of a laser beam and a character or a mark is printed by an array of optically distinguishable dot patterns is provided. When the dot patterns are arrayed by M number in column and N number in row and the character or the mark having a size of A×B is printed, the dot pattern has irregularity of no more than S+10 μm, and an almost circular shape of no lower than 100 μm and not more than the smaller diameter either A/M or B/N, when viewed from the emulsion layer side. A surface roughness is set in the range of 0.2 μm to 1.0 μm.

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patent: 5063137 (1991-11-01), Kiyonari et al.
patent: 5940115 (1999-08-01), Nakamura et al.
patent: 5998759 (1999-12-01), Smart
patent: 6492616 (2002-12-01), Tanaka et al.
patent: 10-305377 (1998-11-01), None
patent: 3191201 (2001-05-01), None

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