Readily Visible Image Formation Patents (Class 430/292)
  • Patent number: 4966828
    Abstract: Disclosed is a compound of the general formula ##STR1## wherein L=H or CO--(R.sup.1).sub.n (CX.sub.3).sub.m, M=alkylene, alkenylene, Q=S, Se, O, dialkylmethylene, alken-1,2-ylene, 1,2-phenylene or N-R, with M+Q together forming 3 or 4 ring members, R=alkyl, aralkyl or alkoxyalkyl, R.sup.1 is an aromatic group and X=Cl, Br or I, with n=O and m=1 or n=1 and m=1 or 2. The compounds, on exposure, eliminate HX and form free radicals and are therefore highly effective as acid donors and free radical initiators for photochemical processes.
    Type: Grant
    Filed: September 13, 1984
    Date of Patent: October 30, 1990
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Reinhard Doenges, Hans Ruckert, Ulrich Geissler, Hartmut Steppan
  • Patent number: 4965073
    Abstract: Disclosed is an improved process for preparing the printed circuit board, which comprises coating a photo-curable electrodeposition coating composition on the surface of the copper foil of a copper-clad, laminated plate to form a photo-sensitive resist film thereon, lapping a photographic negative or positive film onto the photo-sensitive resist film, and exposing to an active light, followed by development, the improvement comprising incorporating a colorless or substantially colorless reduction-type leico pigment into the electrodeposition coating composition to form a photo-sensitive resist film containing the leico pigment, and to develop a color in an exposed area of the photo-sensitive resist film by exposing to the active light.
    Type: Grant
    Filed: March 21, 1990
    Date of Patent: October 23, 1990
    Assignee: Kansai Paint Co., Ltd.
    Inventors: Tsutomu Maruyama, Kiyotake Fukawa, Atsushi Akiyama, Yoshihiro Kiyomura
  • Patent number: 4965174
    Abstract: A recording medium is provided which comprises a recording layer comprising at least one set of image-forming units containing a region holding a photosensitive protein and a color-developing means capable of developing a color according to a change in the hydrogen ion concentration in the region. Each of said image-forming units within the same set having a photosensitive protein sensitive to a different wavelength.
    Type: Grant
    Filed: October 24, 1989
    Date of Patent: October 23, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryuichi Arai, Masahiro Haruta, Nobuko Yamamoto, Tetsuya Yano, Hiroyoshi Kishi, Masanori Sakuranaga
  • Patent number: 4962011
    Abstract: Novel photopolymerizable recording materials suitable in particular for producing photoresist layers and lithographic printing plates are composed of one or more photopolymerizable, olefinically unsaturated organic compounds, optionally a polymeric binder, a photopolymerization initiator, a color-forming system composed of a color former and a photooxidant, a certain benzotriazole compound as a sensitizer and optionally further additive and/or auxiliary substances.
    Type: Grant
    Filed: May 17, 1988
    Date of Patent: October 9, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Reinhard Aldag, Peter Neumann, Andreas Boettcher, Thomas Bluemel, Friedrich Seitz
  • Patent number: 4948705
    Abstract: A highlight mask, especially suited for printing from positive color transparencies, is made of photochromic glass which, like Corning PHOTOGRAY EXTRA sunglass lens material, darkens not only under ultraviolet radiation but also under visible radiation in the blue range. The mask is made by mounting, onto its upper surface, a photo transparency and exposing it to flashes of intense light strong in the blue range. Such radiation penetrates the thin or highlight areas of a photo transparency, regardless of their color tint, and creates a negtive highlight-masking image in the glass. While it does not effect general contrast reduction over the entire film area, the highlight masking image requires no further development, remains in registration with the transparency for photoprinting, and fades in time or when heated, so that the glass may be reused.
    Type: Grant
    Filed: January 9, 1989
    Date of Patent: August 14, 1990
    Inventor: Norman W. Throgmorton
  • Patent number: 4942113
    Abstract: The contrast and sharpness of photoresist images is enhanced by depositing a layer of a photobleachable compound onto the photoresist layer. The photobleachable layer is sensitive to the light used to expose the photoresist and forms a contrast enhancement layer (CEL) on the photoresist layer. Fulgides and photochromic butyrolactones are selected for forming the photobleachable layer. Such compounds can be deposited from a hydrocarbon solution, such as toluene, and are soluble in the standard alkali, photoresist developers. The process is particularly advantageous for producing integrated circuits.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: July 17, 1990
    Assignee: Plessey Overseas Limited
    Inventor: Clive Trundle
  • Patent number: 4940649
    Abstract: Novel photopolymerizable recording materials suitable in particular for producing photoresist layers and lithographic printing plates are composed of one or more photopolymerizable, olefinically unsaturated organic compounds, optionally a polymeric binder, a photopolymerization initiator, a color-forming system composed of a color former and a photooxidant, a certain 4-phenylpyridine as sensitizer and optionally further additive and/or auxiliary substances.
    Type: Grant
    Filed: May 17, 1988
    Date of Patent: July 10, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Reinhard Aldag, Peter Neumann, Andreas Boettcher, Thomas Bluemel, Friedrich Seitz, Friedrich-Wilhelm Raulfs
  • Patent number: 4937170
    Abstract: A photographic element formed from a substrate and light sensitive coating on the substrate wherein the coating comprises a mixture of a diazo compound and an aromatic carboxylic coupling agent having phenolic hydroxy groups, in an acidic medium.
    Type: Grant
    Filed: March 1, 1988
    Date of Patent: June 26, 1990
    Assignee: Hoechst Celanese Corporation
    Inventor: Dieter Mohr
  • Patent number: 4935331
    Abstract: This invention relates to a method for making a dry transfer, photopolymerizable positive-working imaging system which provides a photopolymerizable layer on a support and a colored layer on a substrate. Upon imagewise exposure of the photopolymerizable layer, subsequent lamination of the colored layer to the photopolymerized layer and peel apart, a colored image is produced due to the preferred adhesion of the colored layer to the nonexposed areas of the photopolymerized layer.
    Type: Grant
    Filed: October 21, 1988
    Date of Patent: June 19, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: Stephan J. W. Platzer, Stanley F. Wanat
  • Patent number: 4925767
    Abstract: Process for controlling the visual appearance of an image present on a permanent support in the form of a hydrophilic colloid layer, layer system or relief pattern by the transfer of a continuous non-photosensitive layer from a temporary support onto said permanent support either before or after said image is formed thereon, which comprise by pre-wetting the permanent support either image-free or with said image already thereon, containing the pre-wetted support with said continuous layer carried on the temporary support, and stripping off the temporary support to leave the continuous layer adhering on the permanent support, said continuous layer being non-photosensitive and contains hardened gelatin, the gelatin being applied at a coverage of at most 20 g/m2 and having a degree of hardening corresponding with that achieved by the addition of at least 0.001 g of formaldehyde per gram of gelatin.
    Type: Grant
    Filed: December 14, 1988
    Date of Patent: May 15, 1990
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Eddie R. Daems, Luc H. Leenders
  • Patent number: 4923389
    Abstract: Negative-working, silver wash-off element comprising, in order, (a) support, (b) photosensitive layer comprising silver halide and hydrophilic macromolecular organic polymer dispersion medium including a dispersed phase of a monomer compound and photoinitiator, and (c) an abrasion overcoat layer. In another embodiment, the wash-off element has between the support and abrasion overcoat layer, nearer the support a layer comprising binder, colorant and photosensitive silver halide and a photosensitive layer comprising silver halide and said hydrophilic macromolecular organic polymer dispersion medium including said dispersed phase. The wash-off element is useful for the preparation of half-tone images.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: May 8, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert P. Held
  • Patent number: 4923780
    Abstract: This invention relates to a process for preparing a reverse image using a pigmented peel-apart element containing a photoinhibitor. More particularly this invention relates to a process for preparing a negative or reverse surprint proof using peel-apart photosensitive elements comprising a strippable cover sheet; a photoadherent layer containing a colorant and a photoinhibitor compound; a tacky, essentially nonphotosensitive contiguous layer; and a support.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: May 8, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Harvey W. Taylor, Jr.
  • Patent number: 4912011
    Abstract: A light-sensitive material and an image recording method using the same are disclosed. The material comprises a support having provided thereon a light sensitive layer containing at least a light-sensitive silver halide, a reducing agent, a polymerizable compound, and a color image forming substance, wherein at least the polymerizable compound and the color image forming substance are encapsulated in the same microcapsules. The material exhibits high sensitivity and excellent stability with time.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: March 27, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Soichiro Yamamoto, Shun-ichi Ishikawa, Fumiaki Shinozaki, Hideki Ohmatsu
  • Patent number: 4873178
    Abstract: An optical recording medium is provided which comprises a substrate and a colored film formed by electrolytic polymerization on the substrate. The film may be formed on an electroconductive substrate, or it may be transferred onto a non-electroconductive substrates. A method for recording employing the electrolytically polymerized film is also provided.
    Type: Grant
    Filed: January 19, 1988
    Date of Patent: October 10, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiro Haruta, Yoko Kuwae, Hirohide Munakata, Satoshi Yuasa, Etsuko Sugawa
  • Patent number: 4871642
    Abstract: A light-sensitive material comprising a light-sensitive layer containing silver halide, a reducing agent and a polymerizable compound provided on a paper support. A surface of the paper support on which the light-sensitive layer is provided has a low water absorptiveness of not more than 3 g/m.sup.2 which is a value measured according to Cobb test method.
    Type: Grant
    Filed: August 4, 1987
    Date of Patent: October 3, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shigehisa Tamagawa, Masayuki Kuroishi
  • Patent number: 4833066
    Abstract: In producing a transfer print, a lacquer layer is deposited on a substrate and, in turn, a color layer, an adhesive layer, another lacquer layer, a talcum layer and a photo layer are placed on the lacquer layer. After a portion of the photo layer is exposed, the non-exposed areas of the photo layer and the other layers in register with the non-exposed areas are removed. After the exposed area of the photo layer is removed along with selected subjacent layers, the end product includes the substrate and the remaining areas of the lacquer area on the substrate, the color layer and the adhesive layer.
    Type: Grant
    Filed: January 12, 1987
    Date of Patent: May 23, 1989
    Assignee: Grobena AG
    Inventor: Anton Fuchs
  • Patent number: 4830947
    Abstract: A light-sensitive material comprising a light-sensitive layer containing silver halide, a hydrophilic polymer adsorbed on the silver halide, a reducing agent and a polymerizable compound provided on a support, characterized in that the hydrophilic polymer comprises gelatin and a water soluble vinyl polymer having a high physical retardance is disclosed. The ratio of the vinyl polymer to the gelatin ranges from 0.1 to 20 weight %. The physical retardance of the vinyl polymer is not less than 25.0, which is defined as a value measured according to PAGI method.
    Type: Grant
    Filed: October 6, 1987
    Date of Patent: May 16, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Yutaka Oka
  • Patent number: 4816367
    Abstract: A multicolor imaging material comprises a substrate, a capsule layer made up of a plurality of heat-meltable microcapsules including color former and a developer material layer. When the laser beams having wavelengths of .lambda..sub.1, .lambda..sub.2, and .lambda..sub.3 are applied to the multicolor imaging material according to the signals corresponding to three primary colors, the heat-meltable microcapsules for individual colors independently generate heat, thereby causing the heat-meltable substance to be melted. This brings about the reaction of the color formers for individual colors with the developer to developer colors, thereby forming a color image comprised of cyan, magenta and yellow.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: March 28, 1989
    Assignee: Seiko Instruments Inc.
    Inventors: Hiromichi Sakojiri, Hiroshi Takahashi
  • Patent number: 4814252
    Abstract: A light-sensitive material comprising a light-sensitive layer containing silver halide, a reducing agent and a polymerizable compound provided on a paper support. A surface of the paper support on which the light-sensitive layer is provided has such a smooth surface that the smoothness value in terms of the Bekk Smoothness is not less than 300 seconds. The Bekk Smoothness is a value measured using the Bekk Tester.
    Type: Grant
    Filed: August 14, 1987
    Date of Patent: March 21, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shigehisa Tamagawa, Masayuki Kuroishi
  • Patent number: 4806451
    Abstract: The invention relates to a process for producing an image on a light-sensitive tonable layer comprising the steps of:(A) exposing the light-sensitive layer imagewise to produce imagewise tacky and complementary non-tacky areas;(B) bringing the imagewise-exposed layer into surface-to-surface contact with a supported non-photosensitive transfer layer containing at least one finely divided powder and/or a dissolved dye in a binder; and(C) separating the transfer layer from the light-sensitive layer, whereby the transfer layer adheres selectively to the imagewise tacky areas,the improvement wherein, the binder of the transfer layer consists essentially of(a) about 55-97 wt. % of at least one polymer in the form of a powder having a minimum film-forming temperature of above 50.degree. C., and(b) about 3-45 wt.
    Type: Grant
    Filed: June 24, 1987
    Date of Patent: February 21, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Helmut H. Frohlich
  • Patent number: 4804611
    Abstract: The present invention provides a method for reducing short time-scale reciprocity failure effects of a photosensitive imaging sheet. The photosensitive imaging sheet comprises a substrate having a layer of microcapsules on one surface thereof. The microcapsules contain an internal phase of an acrylate monomer, photoinitiator, and color former. A portion of the microcapsules of the imaging sheet is image-wise exposed to high intensity light and then allowed to recover from the exposure. The exposure and recovery steps are repeated to form a latent image. By pulsing the light onto the photosensitive imaging sheet, the total exposure energy required per unit area is significantly reduced compared to the known short time-scale exposure method.
    Type: Grant
    Filed: June 24, 1987
    Date of Patent: February 14, 1989
    Assignee: The Mead Corporation
    Inventor: Timothy R. Geis
  • Patent number: 4789619
    Abstract: A positive-working radiation-sensitive mixture is described that contains (a) a radiation-sensitive compound which forms a strong acid under the action of actinic radiation, (b) a compound with at least one C--O--C bond cleavable by acid, (c) a binder which is insoluble in water but soluble in aqueous-alkaline solutions, and (d) a polymethine dye. The polymethine dyes used are hemioxonol dyes or symmetrical cyanine dyes. In the light-sensitive mixture, these dyes effect high sensitization and high image sharpness contrast which, in addition, is substantially irreversible.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: December 6, 1988
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans Ruckert, Joachim Knaul
  • Patent number: 4782006
    Abstract: An optical recording method comprises the steps of:(A) irradiating a radiation corresponding to a recording information on an optical recording medium having a recording layer containing a diacetylene derivative and at least one selected from the group (hereinafter called the group B) consisting of azulenium salt compounds, pyrylium dyes, diene compounds, croconic methine dyes and polymethine compounds, thereby forming a latent image; and(B) irradiating a radiation on the recording medium having said latent image formed thereon to thereby visualizing said latent image.
    Type: Grant
    Filed: December 10, 1986
    Date of Patent: November 1, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yukuo Nishimura, Ken Eguchi, Kunihiro Sakai, Haruki Kawada, Hiroshi Matsuda, Takashi Nakagiri, Toshihiko Miyazaki, Yoshinori Tomida, Toshiaki Kimura, Kenji Saito
  • Patent number: 4780393
    Abstract: Upon imagewise exposure, a photopolymerizable composition which contains(a) a polymeric binder;(b) a compound that has at least one terminal ethylenic double bond and a boiling temperature, at standard pressure, of above 100.degree. C., and that can form a polymer by polymerization initiated by a free-radical process;(c) a photoinitiator;(d) a leuco base of a triarylmethane dye; and(e) a photochromic spiro-indolino-benzopyran compound represented by the formula ##STR1## wherein R denotes a hydrogen atom or a C.sub.1 -to-C.sub.16 alkyl group,R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are identical or different, and each denotes a hydrogen or a halogen atom, a C.sub.1 -to-C.sub.4 alkyl or alkoxy group, or a nitro group, andR.sup.5, R.sup.6, R.sup.7 and R.sup.8 are identical or different, and each denotes a hydrogen or a halogen atom, a nitro or an amino group, a C.sub.1 -to-C.sub.5 alkyl or alkoxy group, or a C.sub.6 -to-C.sub.
    Type: Grant
    Filed: January 22, 1987
    Date of Patent: October 25, 1988
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Hans-Dieter Frommeld
  • Patent number: 4777111
    Abstract: This invention relates to a composition and method for enhancing the contrast of images of an underlying photolithographic layer. A photographic element, including a photoresist layer, is applied to a substrate. The photoresist layer contains a contrast-enhancing layer including at least one light-sensitive compound capable of producing acidic photoproducts upon exposure to actinic radiation, at least one indicator dye that changes color on exposure to acidic conditions and at least one polymeric binder soluble in water or weakly alkaline aqueous solutions. The photographic element is exposed to active radiation sufficient to cause photobleaching of the contrast enhancement layer and exposure of the photoresist layer. The photographic element is exposed to actinic radiation sufficient to cause photobleaching of the contrast enhancement layer and exposure of the photoresist layer.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: October 11, 1988
    Assignee: Fairmount Chemical Company, Inc.
    Inventors: David B. Blumel, Albert S. Deutsch
  • Patent number: 4772534
    Abstract: A light-sensitive composition containing a novel light-sensitive s-triazine compound represented by the formula (I) as a free radical-generating agent is disclosed. The s-triazine compound responds radiation in the range of the near ultraviolet to visible light, shows high sensitivity for photolysis and, therefore, the compositon has high light-sensitivity.
    Type: Grant
    Filed: September 5, 1986
    Date of Patent: September 20, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kouichi Kawamura, Hirokazu Kondo, Yoshimasa Aotani
  • Patent number: 4769257
    Abstract: A foamed plastics substrate has an image formed on its surface by differential ablation by a laser. A composition is applied to the surface in the shape of the image to be formed and has an ablation rate different to that of the foam. After irradiation of the surface, the image is formed in relief on the surface.
    Type: Grant
    Filed: October 9, 1987
    Date of Patent: September 6, 1988
    Inventors: Walter W. Duley, Theodore A. Bieler
  • Patent number: 4764451
    Abstract: An image-forming method which comprises:imagewise exposing a light-sensitive material comprising a light-sensitive layer provided on a support wherein the light-sensitive layer contains silver halide, a reducing agent, a polymerizable compound and a photo-polymerization initiator;simultaneously or thereafter developing the light-sensitive material to polymerize the polymerizable compound within the area where the latent image of the silver halide has been formed;pressing the light-sensitive material on an image-receiving material to transfer unpolymerized polymerizable compound to the image-receiving material; andirradiating the image-receiving material with a light.
    Type: Grant
    Filed: January 12, 1987
    Date of Patent: August 16, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Shunichi Ishikawa
  • Patent number: 4762766
    Abstract: A dry transfer film and a method for preparing transfer characters therefrom in which the transfer film includes a carrier layer, a photosensitized color carrying layer disposed adjacent to the carrier layer and a photosensitized adhesive layer disposed adjacent to the color carrying layer. Both the color carrying and adhesive layers are photosensitive to certain respective wavelengths of the electromagnetic spectrum so that when exposed to such wavelengths, they become soluble in a respective solvent or solvents. The unexposed portions of these layers remain insoluble in such solvents.
    Type: Grant
    Filed: January 14, 1986
    Date of Patent: August 9, 1988
    Assignee: Kroy Inc.
    Inventor: Kenneth M. Melbye
  • Patent number: 4761360
    Abstract: A light-sensitive material comprising a light-sensitive layer which contains silver halide, a reducing agent and a polymerizable compound provided on a support, characterized in that the light-sensitive layer further contains a silver diazotate having the following formula:Ar--N.dbd.N--O--Ag(L).sub.nin which Ar is an aryl group or a heterocyclic group, each of which may have one or more substituent groups; L is a ligand; and n is 0, 1 or 2. Image-forming methods utilizing the light-sensitive materials are also disclosed.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: August 2, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kozo Sato, Soichiro Yamamoto
  • Patent number: 4758497
    Abstract: The invention features a new series of triazine compounds which are characterized by their ability to generate free radicals upon irradiation in a desired optical region, such that they are useful in the fabrication of lithographic plates having improved exposure speed, development, print-out, and contrast characteristics.
    Type: Grant
    Filed: April 17, 1987
    Date of Patent: July 19, 1988
    Assignee: Polychrome Corporation
    Inventors: Ajay Shah, William Rowe
  • Patent number: 4748102
    Abstract: Photographic images may be produced on a backing such as paper and polyester sheets, from photographic negatives which encompass line rendering, design comps, copy, complex color separation or the like with water-based varnishes and pigments, the resulting images closely resembling, if not exactly, the same image in its commercially printed form. Thus all aspects of color proofs produced by this invention provide greatly improved predictability as to the appearance of the final printed job, with a further improvement of cost savings over conventional techniques of preparing color proofs. Also, said proofing method can be used to provide a "transfer" so that one may transfer the colored image or images to a more suitable or required backing.
    Type: Grant
    Filed: May 29, 1986
    Date of Patent: May 31, 1988
    Inventors: Edward L. Weller, Jr., Edward Renkor, Edward L. Weller, III
  • Patent number: 4729935
    Abstract: A process for the production of photographic images utilizing a photographic element comprising a transparent support and a coating on the support comprising a diazonium composition having a light absorbency of about 45% or less, and a colorant composition, said coating having a light transmission of not more than about 0.1%.
    Type: Grant
    Filed: October 18, 1985
    Date of Patent: March 8, 1988
    Assignee: Hoechst Celanese Corporation
    Inventors: John E. Walls, Major S. Dhillon
  • Patent number: 4710447
    Abstract: A method and photo-sensitive ink solution used for producing a tone-accurate color process proof or color transfer is disclosed. The method includes multiple applications of sequential layers of extender coat powder and photo-sensitive ink solution coats. These layers are individually exposed to actinic light through a design bearing film, and that material not underlying the exposed ink coat is removed by means of a light water spray before a new series of sequential layers are applied.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: December 1, 1987
    Assignee: Castcraft Industries, Inc.
    Inventor: Manny Kreiter
  • Patent number: 4705739
    Abstract: A radiation-sensitive, imageable article comprises in sequence a substrate, a vapor-deposited colorant layer capable of providing a reflection optical density of at least 0.6 to a 10 nm band of the electromagnetic spectrum between 280 and 900 nm, a vapor-deposited metal or metalloid layer of uniform composition, and a photosensitive resist layer which is non-integral with said colorant layer, the ratio of the thickness of said colorant layer to said metal or metalloid layer being at least 7:1.
    Type: Grant
    Filed: April 24, 1986
    Date of Patent: November 10, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Richard S. Fisch
  • Patent number: 4704347
    Abstract: A method of manufacturing a semiconductor device, in which there is applied to a surface of a semiconductor substrate a base layer of photosensitive lacquer, which is coated with a top layer of photosensitive lacquer. By means of a first patterned irradiation, there is formed in the top layer a mask of which a contact copy is formed in the base layer during a second irradiation. A material which can be discolored is used for the top layer. During the first irradiation, the top layer is locally discolored, whereupon the layer thus discolored is used as a mask during the second irradiation. By the use of the discoloring top layer, additional processing steps, which would ensure from a wet development of the top layer, are avoided.
    Type: Grant
    Filed: January 29, 1986
    Date of Patent: November 3, 1987
    Assignee: U.S. Philips Corporation
    Inventors: Franciscus A. Vollenbroek, Jan G. Dil, Henricus J. J. Kroon, Elisabeth J. Spiertz, Wilhelmus P. M. Nijssen
  • Patent number: 4696888
    Abstract: Light-sensitive compounds are described which have the formula ##STR1## wherein R.sup.1 and R.sup.2 denote H or alkyl, R.sup.3 and R.sup.4 denote H or 4,6-bis-trichloromethyl-s-triazin-2-yl, R.sup.5 and R.sup.6 denote H or halogen, alkyl, alkenyl or alkoxy, and Ar denotes a mononuclear to trinuclear aromatic group.These compounds are suitable as photoinitiators for free-radical polymerizations or as photolytic acid donors for acid-cleavable compounds, and for cross-linking and color formation reactions. They are distinguished by a high sensitivity in various spectral ranges.
    Type: Grant
    Filed: July 30, 1986
    Date of Patent: September 29, 1987
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Gerhard Buhr
  • Patent number: 4695527
    Abstract: A photopolymerizable composition is disclosed which comprises: (a) a free-radically polymerizable compound, (b) a polymeric binder, (c) a photopolymerization initiator, (d) a compound which is thermally crosslinkable with the polymeric binder, with a polymerization product of (a) or with itself, and (e) a pigment. The disclosed composition is used for applying markings to printed circuits and preferably is applied to the solder-resist layer using a dry-resist process, is exposed and then developed, either separately or together with the solder-resist layer.
    Type: Grant
    Filed: June 17, 1986
    Date of Patent: September 22, 1987
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ulrich Geissler, Heide Lampas
  • Patent number: 4690886
    Abstract: A method for making a dry planographic printing plate, which comprises: exposing through a negative transparency a dry negative working presensitized plate comprising a base substrate having provided thereon, in order, a photosensitive layer containing an orthoquinonediazide compound and a silicone rubber layer; developing the exposed plate; exposing the developed plate to light so as to make its exposure value not less than 5% of the exposure value at the time of the exposure through the negative transparency; and then treating the exposed plate with a basic compound.
    Type: Grant
    Filed: February 13, 1985
    Date of Patent: September 1, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasuhisa Naritomi, Hiroshi Takahashi, Keisuke Shiba
  • Patent number: 4687726
    Abstract: Disclosed are a novel photosensitive recording material and a method for using the recording material in the production of planographic printing plates. The recording material comprises a support and a negative-working photosensitive layer that contains a diazonium salt polycondensation product as the photosensitive compound and, in addition, a colorless inorganic pigment which is insoluble in water and organic solvents and which has an average particle diameter from 1 to 20 .mu.m. The pigment is present in a quantity from 0.01 to 2% by weight, relative to the non-volatile constituents of the layer, and is evenly distributed in the layer. Due to the pigment content, a rough layer surface is formed, which has the effect of reducing the time required for creating a vacuum in a vacuum frame into which the recording material is mounted. The presence of the pigment in the layer also produces an improved tonal rendering in the print obtained.
    Type: Grant
    Filed: May 8, 1985
    Date of Patent: August 18, 1987
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gunter Schlogl, Gerhard Mack, Manfred Michel
  • Patent number: 4681824
    Abstract: A fluorescent screen of a color picture tube is manufactured by the steps of forming a film of substance which becomes sticky when exposed to light on an inner surface of a panel of the tube, exposing predetermined portion of the film through a shadow mask to render sticky the exposed portions, repeatedly applying powders of phosphors of respective colors onto the portions which became sticky so as to form phosphor picture elements of respective colors, exposing portions of the film other than the predetermined portions to render them sticky, and applying a powder of graphite to the portions other than the predetermined portions to form a black matrix film.
    Type: Grant
    Filed: April 16, 1982
    Date of Patent: July 21, 1987
    Assignee: Hitachi, Ltd.
    Inventor: Yoshifumi Tomita
  • Patent number: 4668608
    Abstract: There are disclosed negative-working resist compositions featuring a binder and a radiation-sensitive compound that loses HX upon exposure, to become less soluble in an aqueous base. X is selected from the group consisting of --CN, halide, and --SO.sub.2 R.sup.1 and R.sup.1 is alkyl of 1-5 carbon atoms or aryl of from 6 to 10 carbon ring atoms.
    Type: Grant
    Filed: September 2, 1986
    Date of Patent: May 26, 1987
    Assignee: Eastman Kodak Company
    Inventor: Michael J. Lindstrom
  • Patent number: 4661433
    Abstract: Aryl nitrones, of the type used in contrast enhancement photolithography techniques, are stabilized by adding thereto a drying agent such as molecular sieve, silica gel or an alkylalkoxysilane. The resulting compositions are substantially storage stable.
    Type: Grant
    Filed: December 31, 1984
    Date of Patent: April 28, 1987
    Assignee: General Electric Company
    Inventor: Gary C. Davis
  • Patent number: 4659649
    Abstract: The invention provides new compositions which change color on exposure to actinic radiation and contain a photosensitive onium, e.g. iodonium or sulphonium, salt and a dyestuff which changes color when protonated. The compositions may also include a resin, especially a resin curable by the onium salt when the latter is exposed, and preferably an epoxy resin. The compositions are useful especially as coatings, e.g. for making screen stencils or for producing lithographic printing plates.
    Type: Grant
    Filed: April 30, 1984
    Date of Patent: April 21, 1987
    Assignee: Sericol Group Limited
    Inventors: Peter Dickinson, Michael Ellwood
  • Patent number: 4657840
    Abstract: A radiation-sensitive, imageable article comprises in sequence a substrate, a vapor-deposited colorant layer capable of providing an optical density of at least 0.3 to a 10 nm band of the electromagnetic spectrum between 280 and 900 nm, and a vapor-deposited graded metal/metal oxide or metal sulfide layer.
    Type: Grant
    Filed: July 8, 1986
    Date of Patent: April 14, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Richard S. Fisch
  • Patent number: 4634657
    Abstract: Photoimaging compositions comprising (a) substituted dibromoethane as defined, e.g., 1,2-dibromotetrachloroethane, 1,2-dibromo-1,1-dichloroethane, etc. and (b) leuco dye. Photoimaging photopolymerizable compositions consist essentially of (a) substituted 1,2-dibromoethane as defined, (b) leuco dye, (c) at least one ethylenically unsaturated compound, (d) photoinitiator taken from the group consisting of -4-trichloromethyl-4-methyl-2,5-cyclohexadienones, benzophenones, alkylaryl ketones, and mixtures thereof; and optionally (e) at least one organic polymeric binder. The compositions are useful to provide a printout image and in admixture with a variety of initiators or initiator systems and ethylenically unsaturated compounds provide photopolymerizable compositions having good printout images.
    Type: Grant
    Filed: August 23, 1984
    Date of Patent: January 6, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Bruce Holman, III
  • Patent number: 4632899
    Abstract: An image-recording process is disclosed, which comprises using a photopolymerizable element comprising a polymerizable vinyl monomer and/or a polymerizable prepolymer, a photopolymerization initiator and a dye capable of being bleached with said vinyl monomer and/or prepolymer or a dye precursor capable of producing the bleachable dye upon being heated, conducting imagewise exposure to polymerize the photopolymerizable element, and heating it to bleach the dye with non-polymerized monomer and/or non-polymerized prepolymer remaining in portions not exposed or exposed or to bleach dye produced from the dye precursor upon heating. A negative working image-recording material for this process is also disclosed.
    Type: Grant
    Filed: December 3, 1984
    Date of Patent: December 30, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Keiji Takeda
  • Patent number: 4629676
    Abstract: An image forming method is disclosed, comprising forming a latent image by imagewise exposing a recording material including a light-sensitive silver salt, a reducing agent, a polymerizable compound, and a binder, on a support, and subsequently subjecting said recording material to a substantially uniform heating at about 80.degree. C. or more under conditions substantially not containing water, thereby forming a polymeric compound in areas where the latent image of the light-sensitive silver salt has formed.
    Type: Grant
    Filed: September 12, 1985
    Date of Patent: December 16, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshihide Hayakawa, Masato Satomura, Kozo Sato
  • Patent number: 4621040
    Abstract: A method for forming an image which comprises imagewise exposing an imaging element with a laser, said imaging element comprising a support carrying on a first surface, in sequence, a layer of microcapsules containing an ink, and a laser-absorptive, ink barrier layer; superposing an imaging-receiving layer adapted to receive ink from said microcapsules over said imaging element and rupturing said microcapsules; whereby ink from said microcapsules in the exposed areas of the imaging element diffuses to said superposed receiving layer forming an image corresponding to the laser exposure.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: November 4, 1986
    Assignee: Polaroid Corporation
    Inventor: Michael S. Viola
  • Patent number: 4598036
    Abstract: A print-out composition containing a leuco dye and a photooxidizing agent is described, said print-out composition containing at least one carbazomethane compound represented by formula (I) as the leuco dye ##STR1## wherein Y represents an amino group-substituted phenyl group represented by formula (Ia) ##STR2## or an indolyl group represented by formula (Ib) ##STR3## wherein X.sub.1 and X.sub.2 each represents a hydrogen atom, an unsubstituted alkyl group, or an alkyl group substituted by a halogen atom, a hydroxy group, a cyano group, or a lower alkoxy group, said alkyl group having up to 12 carbon atoms, a cycloalkyl group, a phenyl group, a benzyl group, or a phenyl or benzyl group substituted by a halogen atom, a lower alkyl group, or a lower alkoxy group, or said X.sub.1 and X.sub.2 together may form a 5-membered or 6-membered heterocyclic group together with the nitrogen atom bonded thereto; X.sub.
    Type: Grant
    Filed: September 10, 1984
    Date of Patent: July 1, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masayuki Iwasaki, Minoru Maeda, Fumiaki Shinozaki, Sadao Ishige