Patents Examined by M. Angebranndt
  • Patent number: 6811959
    Abstract: A process for manufacturing and a photomask including a chrome layer over a transparent substrate, followed by a thin hardmask/barrier layer directly over the chrome layer having a thin resist layer thereover. The thin resist layer is patterned and developed wherein the barrier layer acts to retard the formation of a resist “foot” at the bottom of the resist profile. Exposed portions of the hardmask/barrier layer and the underlying chrome layer are etched, and then any remaining hardmask/barrier layer and resist layer is subsequently removed by an etchant. The hardmask/barrier layer directly over the chrome layer enables an improved pattern transfer mask during chrome etching processes, allows for further reduction in the thickness of the resist layer, improves the image quality, the achievable minimum resolution features, and provides nominal image size control and image size uniformity across the photomask within current process flows and manufacturing.
    Type: Grant
    Filed: March 4, 2002
    Date of Patent: November 2, 2004
    Assignee: International Business Machines Corporation
    Inventor: Christopher K. Magg
  • Patent number: 6797456
    Abstract: A method for forming a photoresist structure that does not have swelling defects. A layer of low activation energy deep ultraviolet photoresist is disposed over a layer that is to be patterned. A layer of high activation energy deep ultraviolet photoresist is then deposited such that the layer of high activation energy photoresist directly overlies the layer of low activation energy photoresist. The two photoresist layers are then processed by performing exposure, post-exposure bake, and development steps to form a photoresist structure. An etch step is then performed so as to form a patterned layer that does not have swelling defects.
    Type: Grant
    Filed: August 1, 2002
    Date of Patent: September 28, 2004
    Assignee: Integrated Device Technology, Inc.
    Inventors: Yiming Gu, John L. Sturtevant, Anging Zhang
  • Patent number: 5529861
    Abstract: A holographic storage media (10) is fabricated from a thin layer of photopolymer recording media. The photopolymer recording media is disposed between a substrate (48) and a capping layer (56). The media (10) is divided into a plurality of storage regions (54), which are formed within wells (52) to isolate each of the regions (54). During a record operation, a pumping operation is first performed to remove oxygen molecules from the media by bombarding the select region that is to have an interference pattern recorded therein with photons for a predetermined duration of time. Once the oxygen molecules have been depleted, then a data beam is generated with data superimposed thereon and a reference beam generated for interference with the data beam in the storage region (54). This results in the recording of an interference pattern.
    Type: Grant
    Filed: March 24, 1994
    Date of Patent: June 25, 1996
    Assignee: Tamarack Storage Devices
    Inventor: Stephen R. Redfield
  • Patent number: 5500325
    Abstract: A dye mixture is disclosed. The mixture is useful in recording layers of optical recording elements. The mixture has:a) a real index of refraction of at least 1.8 in the 780 to 790 nm region of the spectra;b) an imaginary index (k) between 0.3 and 0.02 in the 780 to 790 nm region of the spectra;c) a metallized azo dye comprising an azo group linking a substituted 3-hydroxy-pyridine nucleus to a phenyl nucleus wherein the phenyl nucleus has an alkoxy or thioether substituent at its 2-position; andd) at least a second dye.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: March 19, 1996
    Assignee: Eastman Kodak Company
    Inventors: Derek D. Chapman, Ramanuj Goswami, Csaba A. Kovacs
  • Patent number: 5348828
    Abstract: A process for producing an electrode substrate for use in a liquid crystal device in which a laminate film of a transparent conductive film and a metal film is formed on a first side of a transparent substrate. The laminate film is pattern-etched so as to form islands of the laminate film in a predetermined pattern. A photosensitive anaerobic colored resin is applied on the transparent substrate on which the islands of laminate film arranged in the predetermined pattern. The transparent substrate is uniformly exposed to a light from a second side of the substrate opposite to the first side in an oxygen-containing atmosphere. Unexposed portions of the photosensitive anaerobic resin are removed so as to leave the photosensitive anaerobic resin only in the spaces between adjacent islands of the laminate film, for forming a light-shielding film in each of the spaces.
    Type: Grant
    Filed: February 26, 1991
    Date of Patent: September 20, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuo Murata, Kazuya Ishiwata, Toshifumi Yoshioka
  • Patent number: 5328809
    Abstract: A method is provided for forming in a semiconductive conjugated polymer at least first and second regions having different optical properties. The method comprises: forming a layer of a precursor polymer and permitting the first region to come into contact with a reactant, such as an acid, and heat while permitting the second region to come into contact with a lower concentration of the reactant. The reactant affects the conversion conditions of the precursor polymer in such a way as to control the optical properties of at least the first region so that the optical properties of the first region are different from those of the second region.The precursor polymer may comprise a poly(arylene-1,2-ethanediyl) polymer, at least some of the ethane groups of which include a modifier group whose susceptibility to elimination is increased in the presence of the reactant.
    Type: Grant
    Filed: August 22, 1991
    Date of Patent: July 12, 1994
    Assignee: Cambridge Display Technology Limited
    Inventors: Andrew Holmes, Donal D. Bradley, Richard H. Friend, Arno Kraft, Paul Burn, Adam Brown
  • Patent number: 5300398
    Abstract: A thermal dye transfer process, and intermediate receiver used therein, for obtaining a color image which is used to represent a printed color image obtained from a printing press comprising (a) forming a thermal dye transfer image in a polymeric dye image-receiving layer of an intermediate dye-receiving element comprising a support having thereon said dye image-receiving layer by imagewise-heating a dye-donor element and transferring a dye image to the dye image-receiving layer, (b) adhering the dye image-receiving layer to a surface of a final receiver element by heat laminating the intermediate dye receiving element to the final receiver element, and (c) stripping the intermediate dye receiving element support from the dye image-receiving layer, wherein the intermediate dye receiving element further comprises a cushion layer between the support and the dye image-receiving layer, the shear modulus of the cushion layer being less than the shear modulus of the support and less than ten times the shear modulus
    Type: Grant
    Filed: August 23, 1991
    Date of Patent: April 5, 1994
    Assignee: Eastman Kodak Company
    Inventor: Linda Kaszczuk
  • Patent number: 5270145
    Abstract: A process for forming a dye image including the steps of: (a) exposing a photographic element comprising a light sensitive silver halide emulsion layer containing a color coupler compound capable of forming a heat transferable dye upon development; (b) developing the exposed element resulting from step (a) with a color developer solution to form a heat transferable dye image; (c) heating the exposed, developed element resulting from step (b) to thereby transfer the dye image from the emulsion layer to a dye receiving layer which is part of the photographic element or part of a separate dye receiving element brought into contact with the photographic element; and (d) separating the emulsion layer from the dye receiving layer containing the transferred dye image; wherein the color coupler compound is of the following formula (I):COUP--B (I)wherein COUP represents a coupler moiety capable of forming a heat transferable dye upon reaction of the coupler compound with an oxidized product of the developing solution
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: December 14, 1993
    Assignee: Eastman Kodak Company
    Inventors: Roland G. Willis, John Texter
  • Patent number: 5266425
    Abstract: A method for fabricating a stripe color filter for the input of an image intensifier having a color-interpretive CCD output includes ascertaining CCD subpixel-to input coordinate correlation by test illumination with a positioning laser having low power. Based upon the correlation data assembled, light sensitive filter media, such as color tinted photoresist is exposed at those locations corresponding to like-color CCD subpixels. The media is then developed to form filter media. Subsequent coatings of photoresist of the next color are applied and exposed etc.
    Type: Grant
    Filed: May 29, 1992
    Date of Patent: November 30, 1993
    Assignee: ITT Corporation
    Inventor: Robert J. Field, Jr.
  • Patent number: 5264320
    Abstract: A black dye-donor element for thermal dye transfer comprising a support having thereon a dye layer comprising a mixture of at least one cyan, magenta and yellow dyes dispersed in a polymeric binder, at least one of the cyan dyes having the formula: ##STR1## and at least one of the yellow dyes having the formula: ##STR2## and at least one of the magenta dyes having the formula:
    Type: Grant
    Filed: September 6, 1991
    Date of Patent: November 23, 1993
    Assignee: Eastman Kodak Company
    Inventors: Steven Evans, Derek D. Chapman
  • Patent number: 5230973
    Abstract: An optical information recording medium is disclosed in which the recording layer is a material capable of absorbing energy and being reversibly converted between a substantially non-crystalline or amorphous state and a substantially crystalline state. The recording layer is a Te-Ge-Sb composition which also contains nitrogen. The optical recording medium includes a substrate onto which is sequentially deposited a first dielectric layer, a nitrogen-containing recording layer, a second dielectric layer and a metallic reflecting layer. In order to control the sensitivity of the medium to laser irradiation, the second dielectric layer is graded in thickness and progressively becomes thicker as a function of increasing radius. Alternatively, in another embodiment, the reflecting layer is graded in thickness, and progressively becomes thinner as a function of increasing radius.
    Type: Grant
    Filed: August 24, 1990
    Date of Patent: July 27, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazumi Yoshioka, Takeo Ohta, Masami Uchida, Katsumi Kawahara, Shigeaki Furukawa
  • Patent number: 5213947
    Abstract: An optical recording medium comprising a pair of concentrically-positioned disk-shaped polycarbonate substrates with a recording layer on a single surface of at least one of these substrates, wherein the substratcs are formed into a sealed configuration with the recording layer on the inside, either with or without an inner peripheral spacer and an outer peripheral spacer, using an adhesive which comprises a compound of formula (I), a compound of formula (II)-A or (II)-B, and a compound of formula (III) as specified in the specification.
    Type: Grant
    Filed: March 5, 1991
    Date of Patent: May 25, 1993
    Assignee: Ricoh Company, Ltd.
    Inventors: Yutaka Ueda, Eiji Noda
  • Patent number: 5198324
    Abstract: The present invention provides a method for making a lithographic printing plate having high sensitivity and high printing endurance by scanner-exposing which comprises subjecting a photographic photosensitive material comprising a support and, provided thereon, an unfogged internal latent image type silver halide emulsion layer to scanner-exposing, subjecting the exposed photosensitive material to non-tanning development in the presence of a nucleating agent, and then subjecting the silver halide portion of the emulsion layer to an oleophilizing treatment.
    Type: Grant
    Filed: December 5, 1989
    Date of Patent: March 30, 1993
    Assignee: Mitsubishi Paper Mills Limited
    Inventors: Shigeru Iguchi, Kiyoshi Futaki, Koichi Torizuka, Shozi Oka
  • Patent number: 5153084
    Abstract: A method for the preparation a photo-mask used for photo-imaging selected areas on the surfaces of a three-dimensional printed circuit board substrate. The photo-mask comprises a membrane transparent and degradation resistant to UV light, having at least one side with a contoured shape conforming, and flexible enough to comply with surface irregularities on the surfaces of the three-dimensional substrate being photo-imaged. A pattern of tracks opaque to UV light is positioned along the contoured shape of the membrane. The pattern of tracks on the photo-mask is in accordance with a desired conductive metal trace pattern on the surfaces of the three-dimensional printed circuit board substrate. The photo-mask is prepared by dispensing a track material in a boustrophedenous manner on the surfaces of the substrate being photo-imaged. A membrane material is then poured upon the surfaces containing the dispensed tracks.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: October 6, 1992
    Assignee: General Electric Company
    Inventors: Donald Franklin Foust, Bradley R. Karas, Edward J. Lamby, William V. Dumas