Patents by Inventor Stephen Yeates

Stephen Yeates has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190324370
    Abstract: The present invention relates to an electron beam (eBeam) resist composition, particularly an (eBeam) resist composition for use in the fabrication of integrated circuits. Such resist compositions include an anti-scattering compound which minimises scattering and secondary electron generation, thus affording extremely high resolution lithography. Such high resolution lithography may be used directly upon silicon-based substrates to produce integrated circuits, or may alternatively be used to produce a lithographic mask (e.g. photomask) to facilitate high-resolution lithography.
    Type: Application
    Filed: November 20, 2018
    Publication date: October 24, 2019
    Applicant: The University of Manchester
    Inventors: Scott Lewis, Richard Winpenny, Stephen Yeates
  • Patent number: 10234764
    Abstract: The present invention relates to an electron beam (eBeam) resist composition, particularly an (eBeam) resist composition for use in the fabrication of integrated circuits. Such resist compositions include an anti-scattering compound which minimizes scattering and secondary electron generation, thus affording extremely high resolution lithography. Such high resolution lithography may be used directly upon silicon-based substrates to produce integrated circuits, or may alternatively be used to produce a lithographic mask (e.g. photomask) to facilitate high-resolution lithography.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: March 19, 2019
    Assignee: The University of Manchester
    Inventors: Scott Lewis, Richard Winpenny, Stephen Yeates
  • Publication number: 20180242452
    Abstract: The present invention relates to electrically conductive materials. The present invention also relates to processes for the preparation of these materials and to electronic circuits, electronic devices and textile garments that comprise them.
    Type: Application
    Filed: August 10, 2015
    Publication date: August 23, 2018
    Inventors: Stephen YEATES, Mohammad Nazmul KARIM
  • Publication number: 20180217033
    Abstract: The present invention relates to an imagable specimen sample, particularly an imagable histological sample for imaging via techniques such as scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The invention provides imaging preparation compositions, such as resin compositions, which can be embedded within a specimen sample and can also encapsulate the sample. The compositions contain either or both of a secondary electron generator and/or a self-healing component. The secondary electron generator enhances image quality by increasing the amount of secondary electron scattering. The self-healing component minimises specimen sample damage caused by the imaging technique.
    Type: Application
    Filed: July 25, 2016
    Publication date: August 2, 2018
    Applicant: The University of Manchester
    Inventors: Stephen Yeates, Scott Lewis, Richard Winpenny
  • Publication number: 20170235227
    Abstract: The present invention relates to an electron beam (eBeam) resist composition, particularly an (eBeam) resist composition for use in the fabrication of integrated circuits. Such resist compositions include an anti-scattering compound which minimises scattering and secondary electron generation, thus affording extremely high resolution lithography. Such high resolution lithography may be used directly upon silicon-based substrates to produce integrated circuits, or may alternatively be used to produce a lithographic mask (e.g. photomask) to facilitate high-resolution lithography.
    Type: Application
    Filed: July 30, 2015
    Publication date: August 17, 2017
    Applicant: The University of Manchester
    Inventors: Scott Lewis, Richard Winpenny, Stephen Yeates
  • Publication number: 20170123312
    Abstract: The present invention relates to a resist composition, especially for use in the production of electronic components via electron beam lithography. In addition to the usual base polymeric component (resist polymer), a secondary electron generator is included in resist compositions of the invention in order to promote secondary electron generation. This unique combination of components increases the exposure sensitivity of resists in a controlled fashion which facilitates the effective production of high-resolution patterned substrates (and consequential electronic components), but at much higher write speeds.
    Type: Application
    Filed: March 24, 2015
    Publication date: May 4, 2017
    Applicant: The University of Manchester
    Inventors: Scott LEWIS, Stephen YEATES, Richard WINPENNY
  • Publication number: 20070272917
    Abstract: Semiconducting films are formed on a substrate by coating the substrate with a mixture of a semiconducting material and a substance which results in a Tg of the resulting mixture which is lower than that of the said material, and cross-linking the said material. Multilayer electronic devices may be produced by processes which comprise forming a cross-linked semiconducting film on a substrate in this way and forming a layer on the said film by solution or suspension deposition of a second film forming material in which the cross-linked semiconducting film is substantially insoluble in the solvent or suspending agent used in forming the second film. The invention may be used in making, for example, field effect transistors, light emitting diodes (LEDs), organic solar cells and organic lasers.
    Type: Application
    Filed: October 28, 2004
    Publication date: November 29, 2007
    Inventors: Carlo Cupertino, Philip Mackie, Stephen Yeates
  • Publication number: 20070276089
    Abstract: A process is provided for preparing a modified particulate solid comprising reacting a poly vinyl dispersant with a compound in the presence of a particulate solid and a liquid medium, characterised in that: a) the poly vinyl dispersant has a calculated Log P of less than 1.8 and at least one reactable group; and b) the compound is substantially soluble in the liquid medium and has at least one reactive group which is reactive towards the reactable group(s) of the dispersant. The process prepares modified particulate solids which demonstrate good dispersion stability and small particle size.
    Type: Application
    Filed: December 13, 2004
    Publication date: November 29, 2007
    Inventors: John O'Donnell, Stephen Yeates, Tom Annable
  • Publication number: 20070263050
    Abstract: A process for preparing a modified particulate solid comprising reacting a dispersant with a compound in the presence of a particulate solid and a liquid medium, characterised in that: a) the dispersant has at least one reactable group selected from keto, aldehyde and beta-diketoester groups, b) the compound has at least two groups reactive towards said keto, aldehyde and/or beta-diketoester groups. The process provides a modified particulate solid having improved stability which is particularly useful for liquid vehicles having and range of polarities and for incorporation into ink jet printing inks.
    Type: Application
    Filed: November 24, 2004
    Publication date: November 15, 2007
    Inventors: John O'Donnell, Stephen Yeates, Tom Annable
  • Patent number: 7244960
    Abstract: The present invention relates to solutions of organic semiconductors and their use in the production of electronic components.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: July 17, 2007
    Assignee: Covion Organic Semiconductors GmbH
    Inventors: Hubert Spreitzer, Susanne Heun, Kevin Treacher, Neil Tallant, Stephen Yeates, Beverly Brown
  • Publication number: 20060238117
    Abstract: This invention relates to organic light emitting diodes (OLEDs) and to methods for their manufacture. The invention provides an OLED element or display which enables contrast to be produced in an image. In accordance with the invention a layer of ink is patterned as a blocking layer between two OLED layers. The ink reduces or prevents conduction, i.e. movement of charge, between the two OLED layers in that area of the device. The ink may be dark in colour, e.g. black, to increase the contrast ratio of the OLED. The blocking layer is provided between any two layers in the OLED and blocks the charge movement in these areas. The blocking layer may comprise a multiplicity of ink dots, the density of which determines the extent to which conduction is hindered. The blocking layer may be produced as a “grey-scale” pattern wherein the density of dots is varied across the pattern.
    Type: Application
    Filed: July 30, 2003
    Publication date: October 26, 2006
    Inventors: Janos Veres, Simon Ogier, Stephen Yeates
  • Publication number: 20060105492
    Abstract: A method for forming an organic electronic device, which method comprises the steps of: a) forming a negative image of a desired pattern on a substrate or device layer with a lift-off ink; b) coating a first device layer to be patterned on top of the negative image; c) coating one or more further device layers to be patterned on top of the first device layer to be patterned; and d) removing the lift-off ink and unwanted portions of the device layers above it, thereby leaving the desired pattern of device layers. The method allows the formation of a device structure wherein the device layers to be patterned are self-aligned. The method enables a multiplicity of layers to be patterned in a single set of printing and lift-off steps using one pattern which ensures the excellent vertical alignment of edges, which would be difficult to achieve by direct printing. Horizontal alignment can also be achieved. The size of the device features can be reduced below the actual printing resolution.
    Type: Application
    Filed: July 30, 2003
    Publication date: May 18, 2006
    Inventors: Janos Veres, Simon Ogier, Stephen Yeates
  • Publication number: 20050225616
    Abstract: An ink-jet printing process comprising the steps (a) and (b) in any order or simultaneously: (a) applying an ink to a substrate by means of an ink-jet printer to form an image on a substrate; and (b) applying to the substrate a fixing composition comprising a liquid medium and a polymer containing a plurality of monoguanide and/or biguanide groups by means of an ink jet printer; characterised in that in the fixing composition has a chloride concentration less than 400 ppm by weight.
    Type: Application
    Filed: February 27, 2003
    Publication date: October 13, 2005
    Applicant: AVECIA LIMITED
    Inventors: John O'Donnell, Kevin Johnson, Mark Holbrook, Stephen Yeates, Tom Annable
  • Publication number: 20050165185
    Abstract: A method for preparing a conjugated molecule comprising a first monomer coupled to a second monomer, said method comprising: (i) linking the first monomer to a solid support via the germanium atom of a germyl linking group; (ii) coupling the first monomer to the second monomer in a coupling position to form a bound conjugated molecule, wherein the second monomer has a protecting group in a non-coupling position; (iii) optionally sequentially coupling a third, fourth . . . and nth monomer to the second, third and (n?1)th monomer respectively; (iv) removing the protecting group; and (v) ipso-degermylation to release the bound conjugated molecule.
    Type: Application
    Filed: April 17, 2003
    Publication date: July 28, 2005
    Inventors: Alan Spivey, David Turner, Domenico Carlo Cupertino, Remi Anemian, Stephen Yeates
  • Publication number: 20050041080
    Abstract: A process for forming a chain extended thermoplastic polymer which comprises reacting: (i) a prepolymer comprising one or more guanidinium or biguanidinium units and having at least one reactive end group; and (ii) a chain extender having at least two groups able to react with reactive end group(s) in (i). The polymers may be used as fixing agents to reduce highlighter smear of prints prepared by ink jet printing.
    Type: Application
    Filed: January 6, 2003
    Publication date: February 24, 2005
    Inventors: Denise Hall, Stephen Yeates, Tom Annable
  • Publication number: 20040188672
    Abstract: The present invention relates to solutions of organic semiconductors and their use in the production of electronic components.
    Type: Application
    Filed: March 1, 2004
    Publication date: September 30, 2004
    Inventors: Hubert Spreitzer, Susanne Heun, Kevin Treacher, Neil Tallant, Stephen Yeates, Beverly Brown