Rca Inc.

Thomson Consumer Electronics Inc.

Nitin V Desai

Eugene Samuel Poliniak

Richard Joseph Himics

Pabitra Datta

Michael Kaplan

Istvan Gorog

Peter M Ritt

Richard William Nosker

Thomas R Pampalone

Wilber Clarence Stewart

Harry R Stork

Brian Thomas Collins

Richard LaPeruta, Jr

Samuel Pearlman

Gregory James Cohee

Robert F Poll

Sandra K McClelland

Emil J Gavalchin

Nestor A Arroyo

Neal D Conrad

James F Buchanan

Danielle Helene Herford

Pabitra Datta, Deceased

A light-absorbing matrix 23, having openings therein, is formed on an interior surface of a faceplate panel 12 of a cathode-ray tube 10 by providing a photoreceptor thereon, electrostatically charging the photoreceptor 72 to a substantially uniform level of charge, and exposing the photoreceptor to light through openings 33 in a color selection electrode 24 to selectively discharge the more intensely illuminated areas of the photoreceptor, without substantially discharging the less intensely illuminated areas. The photoreceptor 72 comprises a plurality of layers including a photoresist layer 56, a conductive layer 62, and a photoconductive layer 66. The openings 33 in the color selection electrode 24 have a dimension substantially greater than the dimension of the openings in the resultant matrix 23. The photoreceptor 72 is contacted with a liquid toner having charged pigment particles which form toner lines 84 on the less intensely illuminated areas of the photoreceptor. The photoreceptor 72 is exposed to UV radiation to selectively change the solubility of the photoresist portion 56 thereof into areas of greater and lesser solubility. The photoreceptor 72 is serially developed to expose portions of the interior surface of the panel 12, while leaving the areas of lesser solubility intact. Next, the interior surface of the panel and the areas of lesser solubility are coated with a matrix suspension which is dried to form the matrix 23. The areas of lesser solubility and the overlying light-absorbing matrix material thereon are removed, thereby forming in the matrix 23 a plurality of openings having a width less than the width of the openings 33 in the color selection electrode 24.

Method of manufacturing a matrix for a cathode-ray tube

In accordance with the present invention, a method of electrophotographically manufacturing a luminescent screen assembly for a color CRT 10 on an interior surface of a faceplate panel 12 is described. A volatilizable organic conductive (OC) layer 32 is provided on the interior surface of the panel and a volatilizable organic photoconductive (OPC) layer 34 overlies the OC layer 32. The method includes the steps of: establishing a substantially uniform electrostatic charge on the OPC layer; exposing selected areas of the OPC layer to visible light to affect the charge thereon; developing the selected areas of the OPC layer with a triboelectrically charged, dry-powdered, first color-emitting phosphor; sequentially repeating the charging, exposing and developing sequence for triboelectrically charged, dry-powdered, second and third color-emitting phosphors to form a luminescent screen comprising picture elements of triads of color-emitting phosphors; fixing the phosphors to the underlying OPC layer with a suitable fixative; filming the phosphors; and aluminizing the filmed phosphors. The present method is an improvement over prior methods because the fixing step utilizes an electrostatic spray to uniformly contact the phosphors and the underlying OPC layer with the fixative, without moving the phosphors.

Method of manufacturing a luminescent screen for a CRT

A sealant composition to seal the fill port in a liquid crystal display is disclosed. The subject composition is comprised of a diglycidylether of bisphenol A epoxy precursor, a curing agent therefor and, optionally, a minor amount of a thixotropic agent.

Seal for liquid crystal display

A thin coating of poly(isobutylene) is applied to the edge of a record turntable to prevent the record on the turntable from slipping during acceleration and deceleration of the turntable for playback.

Record turntable and polymeric coating thereon

In accordance with this invention, there is provided a positive resist medium for microlithography which is comprised of a film of a copolymer of sulfur dioxide and certain vinyl esters. A method of manufacturing microelectronic circuits and recording information utilizing the resist medium of this invention is also provided.

Method of forming resist patterns using X-rays or electron beam

This invention relates to novel poly(silane sulfone) copolymers having repeating units represented by the formula ##STR1## wherein R is alkyl and n is an integer. Positive resist recording media prepared from the subject copolymers demonstrate excellent sensitivity and resolution and are resistant to oxygen plasma etching.

Method of forming pattern in positive resist media

A method for thermogravimetrically analyzing a plastic molding composition comprising carbon black and a vinyl chloride homopolymer or copolymer molding resin to determine the carbon black content wherein the method comprises the steps of compounding the molding composition so that the carbon black is uniformly dispersed therein, heating the molding composition in an inert atmosphere to a temperature sufficient to reproducibly thermally decompose the vinyl chloride homopolymer or copolymer, maintaining the molding composition at the decomposition temperature in an inert atmosphere for a first given time which is long enough so that there is no further significant weight loss, weighing the molding composition to determine the weight loss during the first given time and comparing the weight loss for the first given time with that for samples of known composition analyzed under the same conditions to determined the carbon black content of the molding composition.

Method to determine carbon black content

A method for separating out carbon particles from a composition comprising a plastic and carbon particles of submicron dimensions comprising the steps of adding the composition to an organic solvent for the plastic which does not dissolve the carbon particles at a concentration sufficiently dilute to allow the carbon particles to be free from the plastic and filtering the resulting mixture in a calcium carbonate column which traps essentially all of the carbon particles.

Method for removing carbon particles from a molded article

Homopolymers of 1-aza-5-acryloxymethyl-3,7-dioxabicyclo[3.3.0]octane are useful as resists for recording information patterns having high sensitivity and excellent contrast between exposed and unexposed areas.

Method of exposing and developing a homopolymer resist

This invention pertains to an electron beam resist method for forming a surface relief pattern in a poly(oelfin sulfone) layer wherein the polymer layer is useful for depositing a metal film thereon and thereby forming a corresponding surface relief pattern in the metal film. The surface relief pattern is formed using poly(3-methyl-1-cyclopentene sulfone) as the poly(olefin sulfone) layer and using a mixture of cycloheptanone and 2-methylcyclohexanol or a mixture of 2-methylcyclohexanone and 3-methylcyclohexanol as the developer for the poly(3-methyl-1-cyclopentene sulfone) layer.

Method for forming a shallow surface relief pattern in a poly(olefin

A method for the manufacture of multi-colored microlithographic displays especially fluorescent screens for cathode ray tubes is provided in which a film of an olefin sulfone polymer is applied to the substrate of the display. The film is then exposed in predetermined areas with a sufficient amount of radiation to depolymerize and lower the melting point of the polymer in the exposed areas. The film is then heated to a temperature above the softening point of the exposed polymer but below the softening point of unexposed polymer and contacted with the pigment or phosphor which is desired to be applied which selectively adheres to the exposed areas. The exposure and dusting are repeated for each application of different color pigments, toners or phosphors.

Method for the manufacture of multi-color microlithographic displays

Copolymers of an aziridine and sulfur dioxide are disclosed which are useful as positive radiation resists for use in electron beam and x-ray lithography.

Positive resist for electron beam and x-ray lithography and method of

Homopolymers of 1-aza-5-acryloxymethyl-3,7-dioxa-bicyclo[3.3.0]octane are useful as resists for recording information patterns having high sensitivity and excellent contrast between exposed and unexposed areas.

Novel resists and recording media

Recording media comprising a film of a polymer having a repeating unit of the formula ##STR1## wherein R is an alkyl or acyl group and n is an integer are suitable for recording information with electron beams.

Silane electron beam resists

A method of purifying methyl alkyl siloxane lubricants of the formula ##STR1## wherein R is an alkyl group of 4-20 carbon atoms and x is an integer which comprises multiply extracting with acetone.

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Somerset, NJ, United States of America

Nitin V Desai