Patents by Inventor J. Rolfson

J. Rolfson 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: 20070202418
    Abstract: The present invention provides an attenuated phase shift mask (“APSM”) that, in each embodiment, includes completely transmissive regions sized and shaped to define desired semiconductor device features, slightly attenuated regions at the edges of the completely transmissive regions corresponding to isolated device features, highly attenuated regions at the edges of completely transmissive regions corresponding to closely spaced or nested device features, and completely opaque areas where it is desirable to block transmission of all radiation through the APSM. The present invention further provides methods for fabricating the APSMs according to the present invention.
    Type: Application
    Filed: April 27, 2007
    Publication date: August 30, 2007
    Applicant: MICRON TECHNOLOGY, INC.
    Inventor: J. Rolfson
  • Publication number: 20070072343
    Abstract: The invention includes a semiconductor construction having a wire bonding region associated with a metal-containing layer, and having radiation-imageable material over the metal-containing layer. The radiation-imageable material can be configured as a multi-level pattern having a first topographical region with a first elevational height and a second topographical region with a second elevational height above the first elevational height. The second topographical region can be laterally displaced from the bonding region by at least a lateral width of the first topographical region, with said lateral width being at least about 10 microns. Additionally, or alternatively, the elevational height of the second topographical region can be at least about 2 microns above the elevational height of the first topographical region.
    Type: Application
    Filed: October 20, 2006
    Publication date: March 29, 2007
    Inventors: John Aiton, Joseph Richards, J. Rolfson, John Drynan
  • Publication number: 20060257757
    Abstract: The invention includes methods of converting reticles from configurations suitable for utilization with later generation (shorter wavelength) stepper radiations to configurations suitable for utilization with earlier generation (longer wavelength) stepper radiations. The invention can be utilized for converting a reticle from a configuration suitable for 193 nanometer wavelength radiation to a configuration suitable for 248 nanometer wavelength radiation. In such aspect, a quartz-containing material of a substrate can be protected with a patterned layer consisting essentially of molybdenum and silicon while the quartz-containing material is subjected to a dry etch.
    Type: Application
    Filed: July 13, 2006
    Publication date: November 16, 2006
    Inventors: Randall Chance, J. Rolfson, Azeddine Zerrade
  • Publication number: 20060251974
    Abstract: The invention includes reticles and methods of forming reticles. In one aspect, a reticle can include a quartz-containing substrate, an attenuating layer, and an antireflective structure between the attenuating layer and the quartz-containing substrate. The invention can also include a reticle having a relatively transparent region between first and second surfaces, a relatively opaque region proximate the first surface, and a layer comprising one or both of metal fluoride and hafnium oxide proximate the first or second surface. The invention can also include methods of forming reticles in which an antireflective structure is formed over a surface of a quartz-containing substrate. The antireflective structure can comprise a Fabry-Perot pair, and in some aspects can comprise a layer containing one or both of metal fluoride and hafnium oxide.
    Type: Application
    Filed: June 30, 2006
    Publication date: November 9, 2006
    Inventor: J. Rolfson
  • Publication number: 20060130969
    Abstract: A method to provide a ground point for second, or subsequent, e-beam mask-writing steps by selectively removing the photoresist edge bead of a photomask substrate to expose the underlying chrome layer. The selective removal leaves at least one tab of photoresist edge bead over the chrome layer. After the first e-beam mask writing step and subsequent etch, the tab can be removed to expose a portion of the chromium layer that can act as a new ground point for a second e-beam etch. Also, a nozzle for use in selectively removing the edge bead to leave a tab of photoresist edge bead.
    Type: Application
    Filed: January 11, 2006
    Publication date: June 22, 2006
    Inventor: J. Rolfson
  • Publication number: 20060121361
    Abstract: The invention includes reticles and methods of forming reticles. In one aspect, a reticle can include a quartz-containing substrate, an attenuating layer, and an antireflective structure between the attenuating layer and the quartz-containing substrate. The invention can also include a reticle having a relatively transparent region between first and second surfaces, a relatively opaque region proximate the first surface, and a layer comprising one or both of metal fluoride and hafnium oxide proximate the first or second surface. The invention can also include methods of forming reticles in which an antireflective structure is formed over a surface of a quartz-containing substrate. The antireflective structure can comprise a Fabry-Perot pair, and in some aspects can comprise a layer containing one or both of metal fluoride and hafnium oxide.
    Type: Application
    Filed: December 3, 2004
    Publication date: June 8, 2006
    Inventor: J. Rolfson
  • Publication number: 20060113280
    Abstract: A method to provide a ground point for second, or subsequent, e-beam mask-writing steps by selectively removing the photoresist edge bead of a photomask substrate to expose the underlying chrome layer. The selective removal leaves at least one tab of photoresist edge bead over the chrome layer. After the first e-beam mask writing step and subsequent etch, the tab can be removed to expose a portion of the chromium layer that can act as a new ground point for a second e-beam etch. Also, a nozzle for use in selectively removing the edge bead to leave a tab of photoresist edge bead.
    Type: Application
    Filed: January 17, 2006
    Publication date: June 1, 2006
    Inventor: J. Rolfson
  • Publication number: 20060037628
    Abstract: A device for wet processing of a semiconductor-containing substrate addresses contamination in the wet process by removing undesired sources of gas contamination. The method involves pumping a processing liquid through a degasifier, exposing the semiconductor wafer, in a vessel, to the degasified processing liquid; and optionally recirculating the processing liquid through the degasifier and back into the vessel.
    Type: Application
    Filed: January 19, 2005
    Publication date: February 23, 2006
    Inventor: J. Rolfson
  • Publication number: 20060024942
    Abstract: The invention includes a semiconductor construction having a wire bonding region associated with a metal-containing layer, and having radiation-imageable material over the metal-containing layer. The radiation-imageable material can be configured as a multi-level pattern having a first topographical region with a first elevational height and a second topographical region with a second elevational height above the first elevational height. The second topographical region can be laterally displaced from the bonding region by at least a lateral width of the first topographical region, with said lateral width being at least about 10 microns. Additionally, or alternatively, the elevational height of the second topographical region can be at least about 2 microns above the elevational height of the first topographical region.
    Type: Application
    Filed: July 29, 2004
    Publication date: February 2, 2006
    Inventors: John Aiton, Joseph Richards, J. Rolfson, John Drynan
  • Publication number: 20060008710
    Abstract: The present invention provides an attenuated phase shift mask (“APSM”) that, in each embodiment, includes completely transmissive regions sized and shaped to define desired semiconductor device features, slightly attenuated regions at the edges of the completely transmissive regions corresponding to isolated device features, highly attenuated regions at the edges of completely transmissive regions corresponding to closely spaced or nested device features, and completely opaque areas where it is desirable to block transmission of all radiation through the APSM. The present invention further provides methods for fabricating the APSMs according to the present invention.
    Type: Application
    Filed: June 15, 2005
    Publication date: January 12, 2006
    Inventor: J. Rolfson
  • Publication number: 20050205007
    Abstract: An apparatus for baking a film onto a substrate. A film, such as a layer of photoresist, is disposed on a first surface of a substrate while a second surface is exposed to a liquid bath. The liquid bath is maintained at a pre-selected temperature. Exposure of the substrate to the liquid bath allows the film on the opposite surface to bake. The liquid bath is re-circulated to maintain a constant and uniform temperature gradient across the substrate.
    Type: Application
    Filed: May 23, 2005
    Publication date: September 22, 2005
    Inventor: J. Rolfson
  • Publication number: 20050077266
    Abstract: The invention includes methods of converting reticles from configurations suitable for utilization with later generation (shorter wavelength) stepper radiations to configurations suitable for utilization with earlier generation (longer wavelength) stepper radiations. The invention can be utilized for converting a reticle from a configuration suitable for 193 nanometer wavelength radiation to a configuration suitable for 248 nanometer wavelength radiation. In such aspect, a quartz-containing material of a substrate can be protected with a patterned layer consisting essentially of molybdenum and silicon while the quartz-containing material is subjected to a dry etch.
    Type: Application
    Filed: October 14, 2003
    Publication date: April 14, 2005
    Inventors: Randal Chance, J. Rolfson, Azeddine Zerrade
  • Publication number: 20050008943
    Abstract: A method to provide a ground point for second, or subsequent, e-beam mask-writing steps by selectively removing the photoresist edge bead of a photomask substrate to expose the underlying chrome layer. The selective removal leaves at least one tab of photoresist edge bead over the chrome layer. After the first e-beam mask writing step and subsequent etch, the tab can be removed to expose a portion of the chromium layer that can act as a new ground point for a second e-beam etch. Also, a nozzle for use in selectively removing the edge bead to leave a tab of photoresist edge bead.
    Type: Application
    Filed: July 7, 2003
    Publication date: January 13, 2005
    Inventor: J. Rolfson