POSITIVE TYPE IMAGE FORMING MATERIAL AND POSITIVE IMAGE FORMING METHOD USING THE SAME

PROBLEM TO BE SOLVED: To provide a positive type image forming material having high sensitivity to light in the near infrared region, excellent in contrast between image and non-image areas, ensuring a wide range of development conditions and excellent also in chemical resistance as a positive type...

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Bibliographic Details
Main Author TSURUYA YASUYUKI
Format Patent
LanguageEnglish
Published 22.11.2002
Edition7
Subjects
APPARATUS SPECIALLY ADAPTED THEREFOR
CINEMATOGRAPHY
ELECTROGRAPHY
HOLOGRAPHY
LINING MACHINES
MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING,INKING, DAMPING, OR THE LIKE
MATERIALS THEREFOR
ORIGINALS THEREFOR
PERFORMING OPERATIONS
PHOTOGRAPHY
PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES
PHYSICS
PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
PRINTING
PRINTING PLATES OR FOILS
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:PROBLEM TO BE SOLVED: To provide a positive type image forming material having high sensitivity to light in the near infrared region, excellent in contrast between image and non-image areas, ensuring a wide range of development conditions and excellent also in chemical resistance as a positive type image forming material obtained by forming a layer of a positive type photosensitive composition comprising a photothermal conversion material and an alkali-soluble resin on the surface of a support and to provide a positive image forming method using the material. SOLUTION: The positive type image forming material is obtained by forming a layer of a positive type photosensitive composition comprising a photothermal conversion material which absorbs light of a light source for imagewise exposure and converts it into heat and an alkali-soluble resin on the surface of a support, and the alkali- soluble resin is a phenolic resin in which o-cresol occupies 25-40 mol% of phenol components constituting molecules whose molecular weight is <=2,000 and o-cresol occupies <=25 mol% of phenol components constituting molecules whose molecular weight is >=10,000. In the positive image forming method, the positive type image forming material is subjected to scanning exposure with laser light in the wavelength range of 650-1,300 nm and developed with an alkali developing solution.
Bibliography:Application Number: JP20010136912