E.i. Dupont De Nemours and Company

U.S. Philips Corporation

Other

U.S. Phillips Corporation

Du Pont Optical Company

Howard E Simmons

George H Johnson

Josephus M Wijn

Johannes P Van Liempd

Walter R Hertler

Mario Grossa

Thomas Eugene Dueber

Michael G Fickes

David H Scheiber

Martinus J De Graaf

The present invention concerns a phototackifiable composition useful as a coating on a substrate consisting of an optically clear blend of two or more polymers and a photosensitive compound that forms a strong acid on exposure to actinic radiation. The invention also relates to a process for coating such a composition on a support and toning the image-wise exposed composition on the support.

Process for creating a tacky tonable image surface through exposure of a

A photothermal-tackifiable composition, useful as a coating on a substrate, consisting of an optically clear blend of two or more polymers, one or more of which is capable of undergoing a thermochemical reaction, and a photothermosensitive compound, an infrared absorbing dye that generates locally high heat on exposure to infrared or near-infrared radiation, is disclosed. Also disclosed is a process for coating such a composition on a support, exposing the composition to infrared radiation and toning the imagewise exposed composition A 'peel-apart' embodiment is also disclosed.

Single layer dry processible photothermal-sensitive element

Dry processible photosensitive composition including photo-acid

The invention relates to a method of manufacturing a metal matrix suitable for use in the manufacture of optical discs, in which a master plate is used which comprises a recording double layer of a synthetic resin in which each layer comprises a laser light-absorbing dye, the master plate is exposed to modulated laser light in which the laser light in both layers of the recording layer is absorbed and in which as a result of the exposure information bits are formed in the form of bumps having variable longitudinal dimensions and the same width dimensions and the master plate on the side of the recording layer comprises a metal layer which is separated from the master plate, as well as a master plate which is suitable for use in the method described hereinbefore.

Method of manufacturing a matrix and a master plate suitable for use in

A method for making optical recording media in which the optically readable information is embossed therein by means of an information master recording which is directly usable as a stamper.

Direct effect master/stamper for optical recording

Method of recording information, recording element manufactured according to the method and method of producing a metal matrix. Recording in which a recording double layer which has an absorbing dye is exposed to laser light of a higher and a lower energy level, in which by exposure to laser light of the lower energy level, a bump is formed in the recording layer and in which by exposure to laser light of the higher energy level a bulge is formed which at the surface comprises a groove, as well as a recording element obtained by using the method and a method of manufacturing a metal copy from the recording element.

Method of recording information, recording element manufactured

Recording in which a recording double layer which has an absorbing dye is exposed to laser light of a higher and a lower energy level, in which by exposure to laser light of the lower energy level, a bump is formed in the recording layer and in which by exposure to laser light of the higher energy level a bulge is formed which at the surface comprises a groove, as well as a recording element obtained by using the method and a method of manufacturing a metal copy from the recording element.

An optical recording element comprising a light-absorptive layer supported by a dimensionally stable substrate in which the light-absorptive material is a uniformly smooth, thin, homogeneous layer of film-forming polymeric dye having a light absorptivity of at least about 0.046 in the visible and/or infrared spectral regions.

Optical recording element

A photosensitive ceramic coating composition which is fireable in a substantially nonoxidizing atmosphere comprising an admixture of:

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Newark, DE, United States of America

Howard E Simmons