Patents by Inventor David A. Markle

David A. Markle 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: 20060059546
    Abstract: A single sign-on authentication and access management apparatus and method is provided for computer networked digital content providers interconnected in a communication network. A single application service provider coupled to the application servers and a user computer includes an entitlements database interfaced with an authorization server for storing data utilized by the authorization server to responding to user requests to grant or deny access to user requested content.
    Type: Application
    Filed: September 1, 2005
    Publication date: March 16, 2006
    Inventors: David Nester, Jeffrey Cyr, David Markle
  • Publication number: 20050189329
    Abstract: A method and apparatus for performing laser thermal processing (LTP) using one or more two-dimensional arrays of laser diodes and corresponding one or more LTP optical systems to form corresponding one or more line images. The line images are scanned across a substrate, e.g., by moving the substrate relative to the one or more line images. The apparatus also includes one or more recycling optical systems arranged to re-image reflected annealing radiation back onto the substrate. The use of one or more recycling optical systems greatly improves the heating efficiency and uniformity during LTP.
    Type: Application
    Filed: May 3, 2004
    Publication date: September 1, 2005
    Inventors: Somit Talwar, David Markle
  • Publication number: 20050103998
    Abstract: Apparatus and method for performing laser thermal annealing (LTA) of a substrate using an annealing radiation beam that is not substantially absorbed in the substrate at room temperature. The method takes advantage of the fact that the absorption of long wavelength radiation (1 micron or greater) in some substrates, such as undoped silicon substrates, is a strong function of temperature. The method includes heating the substrate to a critical temperature where the absorption of long-wavelength annealing radiation is substantial, and then irradiating the substrate with the annealing radiation to generate a temperature capable of annealing the substrate.
    Type: Application
    Filed: January 22, 2004
    Publication date: May 19, 2005
    Inventors: Somit Talwar, David Markle
  • Publication number: 20050083511
    Abstract: Architecture and method to transfer data in generation, display or printing high edge placement accuracy images from multiple exposures of plurality of predefined patterns, with lower edge placement accuracy. A pattern is laid out on a grid finer, or different from, grid size of image transducer pixel size overlaid by transducer grid and converted to n patterns compatible with transducer grid. When combined by partial exposures weighting patterns unevenly, the n patterns generate an image with line edge positions a fraction (1/(2n?1)) of transducer grid size. For most picture display and step-and-repeat lithography applications, pattern stored in first memory is displayed or partially exposed once, and remaining patterns are displayed or partially exposed 2m?1 times m being copy number of the pattern. Superimposing 2n?1 exposures in human eye to scene integration time, picture with improved line placement accuracy is perceived.
    Type: Application
    Filed: October 22, 2004
    Publication date: April 21, 2005
    Inventor: David Markle
  • Publication number: 20050067384
    Abstract: Apparatus and method for performing laser thermal annealing (LTA) of a substrate using an annealing radiation beam that is not substantially absorbed in the substrate at room temperature. The method takes advantage of the fact that the absorption of long wavelength radiation (1 micron or greater) in some substrates, such as undoped silicon substrates, is a strong function of temperature. The method includes heating the substrate to a critical temperature where the absorption of long-wavelength annealing radiation is substantial, and then irradiating the substrate with the annealing radiation to generate a temperature capable of annealing the substrate.
    Type: Application
    Filed: September 29, 2003
    Publication date: March 31, 2005
    Inventors: Somit Talwar, Michael Thompson, Boris Grek, David Markle
  • Publication number: 20050045604
    Abstract: A method and apparatus for performing laser thermal processing (LTP) using a two-dimensional array of laser diodes to form a line image, which is scanned across a substrate. The apparatus includes a two-dimensional array of laser diodes, the radiation from which is collimated in one plane using a cylindrical lens array, and imaged onto the substrate as a line image using an anomorphic, telecentric optical imaging system. The apparatus also includes a scanning substrate stage for supporting a substrate to be LTP processed. The laser diode radiation beam is incident on the substrate at angles at or near the Brewster's angle for the given substrate material and the wavelength of the radiation beam, which is linearly P-polarized. The use of a two-dimensional laser diode array allows for a polarized radiation beam of relatively high energy density to be delivered to the substrate, thereby allowing for LTP processing with good uniformity, reasonably short dwell times, and thus reasonably high throughput.
    Type: Application
    Filed: September 2, 2003
    Publication date: March 3, 2005
    Inventors: Somit Talwar, David Markle
  • Patent number: 6833908
    Abstract: Architecture and method to transfer data in generation, display or printing high edge placement accuracy images from multiple exposure of plurality of predefined patterns with lower edge placement accuracy. A pattern is laid out on a grid finer or different from grid size of image transducer pixel size, overlaid by transducer grid and converted to n patterns compatible with transducer grid. When combined by partial exposures weighting patterns unevenly, the n patterns generate an image with line edge positions a fraction (1/(2n−1)) of transducer grid size. For most picture display and step-and-repeat lithography applications, pattern stored in first memory is displayed or partially exposed once, and remaining patterns are displayed or partially exposed 2m−1 times m being copy number of the pattern. Superimposing 2n−1 exposures in human eye to scene integration time, picture with improved line placement accuracy is perceived.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: December 21, 2004
    Assignee: Ultratech, Inc.
    Inventor: David A. Markle
  • Patent number: 6825101
    Abstract: A method of this invention includes annealing at least one region of a substrate with a short pulse of particles. The particles can be electrons, protons, alpha particles, other atomic or molecular ions or neutral atoms and molecules. The substrate can be composed of a semiconductor material, for example. The particles can include dopant atoms such as p-type dopant atoms such as boron (B), aluminum (Al), gallium (Ga), or indium (In), and n-type dopant atomic species including arsenic (As), phosphorus (P), or antimony (Sb). The particles can also include silicon (Si) or germanium (Ge) atoms or ionized gas atoms including those of hydrogen (He), oxygen (O), nitrogen (N), neon (Ne), argon (Ar), or krypton (Kr). The particles can be used to anneal dopant atoms previously implanted into the substrate.
    Type: Grant
    Filed: March 27, 2000
    Date of Patent: November 30, 2004
    Assignee: Ultratech, Inc.
    Inventors: Andrew M. Hawryluk, David A. Markle, Somit Talwar
  • Patent number: 6809888
    Abstract: Apparatus and methods for reducing optical distortion in an optical system by thermal means are disclosed. The apparatus includes a heating/cooling system spaced apart from and in thermal communication with an internally reflecting surface of a refractive element in the optical system. The heating/cooling system is adapted to create a select temperature distribution in the refractive optical element near the internally reflecting surface to alter the refractive index and/or the surface profile in a manner that reduces residual distortion.
    Type: Grant
    Filed: April 16, 2003
    Date of Patent: October 26, 2004
    Assignee: Ultratech, Inc.
    Inventor: David A. Markle
  • Publication number: 20040207925
    Abstract: Apparatus and methods for reducing optical distortion in an optical system by thermal means are disclosed. The apparatus includes a heating/cooling system spaced apart from and in thermal communication with an internally reflecting surface of a refractive element in the optical system. The heating/cooling system is adapted to create a select temperature distribution in the refractive optical element near the internally reflecting surface to alter the refractive index and/or the surface profile in a manner that reduces residual distortion.
    Type: Application
    Filed: April 16, 2003
    Publication date: October 21, 2004
    Inventor: David A. Markle
  • Publication number: 20040188396
    Abstract: Apparatus and methods for thermally processing a substrate with scanned laser radiation are disclosed. The apparatus includes a continuous radiation source and an optical system that forms an image on a substrate. The image is scanned relative to the substrate surface so that each point in the process region receives a pulse of radiation sufficient to thermally process the region.
    Type: Application
    Filed: February 26, 2004
    Publication date: September 30, 2004
    Inventors: Somit Talwar, David A. Markle
  • Publication number: 20040173585
    Abstract: Apparatus and methods for thermally processing a substrate with scanned laser radiation are disclosed. The apparatus includes a continuous radiation source and an optical system that forms an image on a substrate. The image is scanned relative to the substrate surface so that each point in the process region receives a pulse of radiation sufficient to thermally process the region.
    Type: Application
    Filed: March 22, 2004
    Publication date: September 9, 2004
    Applicant: ULTRATECH STEPPER, INC.
    Inventors: Somit Talwar, Michael O. Thompson, David A. Markle
  • Patent number: 6753947
    Abstract: A lithography system and method for cost-effective device manufacture that can employ a continuous lithography mode of operation is disclosed, wherein exposure fields are formed with single pulses of radiation. The system includes a pulsed radiation source (14), an illumination system (24), a mask (M), a projection lens (40) and a workpiece stage (50) that supports a workpiece (W) having an image-bearing surface (WS). A radiation source controller (16) and a workpiece stage position system (60), which includes a metrology device (62), are used to coordinate and control the exposure of the mask with radiation pulses so that adjacent radiation pulses form adjacent exposure fields (EF). Where pulse-to-pulse uniformity from the radiation source is lacking, a pulse stabilization system (18) may be optionally used to attain the desired pulse-to-pulse uniformity in exposure dose.
    Type: Grant
    Filed: May 10, 2001
    Date of Patent: June 22, 2004
    Assignee: Ultratech Stepper, Inc.
    Inventors: Dan Meisburger, David A. Markle
  • Patent number: 6747245
    Abstract: Apparatus and methods for thermally processing a substrate with scanned laser radiation are disclosed. The apparatus includes a continuous radiation source and an optical system that forms an image on a substrate. The image is scanned relative to the substrate surface so that each point in the process region receives a pulse of radiation sufficient to thermally process the region.
    Type: Grant
    Filed: November 6, 2002
    Date of Patent: June 8, 2004
    Assignee: Ultratech Stepper, Inc.
    Inventors: Somit Talwar, Michael O. Thompson, David A. Markle
  • Publication number: 20040084427
    Abstract: Apparatus and methods for thermally processing a substrate with scanned laser radiation are disclosed. The apparatus includes a continuous radiation source and an optical system that forms an image on a substrate. The image is scanned relative to the substrate surface so that each point in the process region receives a pulse of radiation sufficient to thermally process the region.
    Type: Application
    Filed: November 6, 2002
    Publication date: May 6, 2004
    Inventors: Somit Talwar, Michael O. Thompson, David A. Markle
  • Patent number: 6731376
    Abstract: Systems and methods for reducing colinearity effects in the formation of microdevices are disclosed. A mask with at least one column of microdevice cells is illuminated with pulses of radiation such that only a single column is illuminated. Images of the column are used to form adjacent columnar exposure fields on a workpiece. The columnar exposure fields so formed each have a width much less than that of the full exposure field capable of being formed by the projection lens. One method of the invention includes forming each columnar exposure field with a single pulse of radiation while the workpiece moves continuously relative to a projection lens and mask. Another method includes forming each columnar exposure field with a burst of radiation pulses or a long continuous pulse while stepping the workpiece beneath a projection lens between bursts. By forming columnar exposure fields that contain a single row of devices, a substantial number of error sources that contribute to co-linearity error are eliminated.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: May 4, 2004
    Assignee: Ultratech Stepper, Inc.
    Inventor: David A. Markle
  • Patent number: 6671235
    Abstract: A method of, and apparatus for, defining disk tracks in magnetic recording media. The track-writing apparatus (20) is capable of forming tracks (340) with a track width (TW) and track spaces (350) with a space width (SW) on a magnetic media disk (70) having an upper surface (70S), wherein the disk comprises a magnetic medium with a thermal diffusion length (X). The apparatus comprises, in order along an optical axis (A1), a laser light source (30) capable of providing a pulsed laser light beam (B1), a light pipe (32), and illumination shaping optical system (40) that provides substantially uniform illumination over an exposure region (ER), and a phase plate (60) having a phase grating (210) with a grating period (p), arranged proximate and substantially parallel to the upper surface of the disk so as to form an periodic irradiance distribution (380) at the surface of the disk when the phase plate is illuminated with the exposure region.
    Type: Grant
    Filed: March 27, 2000
    Date of Patent: December 30, 2003
    Assignee: Ultratech Stepper, Inc.
    Inventors: Andrew M. Hawryluk, Robert D. Hempstead, David A. Markle
  • Patent number: 6556279
    Abstract: A system and method of compensating for image smear that arises when imaging onto a moving workpiece with a single pulse of radiation. The system includes a mask frame capable of supporting a mask to be imaged. The mask frame is operatively connected to a drive unit and is capable of moving in the mask plane. The mask frame is driven in an oscillatory fashion in the mask plane so that when a pulse of radiation illuminates the mask, the mask image moves in the same direction as the moving workpiece, thereby reducing image smear. The present invention is particularly applicable to single-pulse-exposure systems that utilize pulsed radiation sources having relatively long pulse duration, such as flash-lamps or certain types of lasers.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: April 29, 2003
    Assignee: Ultratech Stepper, Inc.
    Inventors: Dan Meisburger, David A. Markle
  • Patent number: 6531681
    Abstract: Radiant energy line source(s) (e.g., laser diode array) and anamorphic relay receiving radiant energy therefrom and directing that energy to a substrate in a relatively uniform line image. The line image is scanned with respect to the substrate for treatment thereof. Good uniformity is provided even when the line source is uneven. Optionally, delimiting aperture(s) located in the anamorphic relay focal plane and a subsequent imaging relay are includeable to permit substrate exposure in strips with boundaries between adjacent strips within scribe lines between circuits. An anamorphic relay focal plane mask with a predetermined pattern can be used to define portions of the substrate to be treated with the substrate and mask scanning motions synchronized with each other. Control of source output, and position/speed of the substrate, with respect to the line image, allows uniform dose and required magnitude over the substrate.
    Type: Grant
    Filed: March 27, 2000
    Date of Patent: March 11, 2003
    Assignee: Ultratech Stepper, Inc.
    Inventors: David A. Markle, Andrew M. Hawryluk, Hwan J. Jeong
  • Publication number: 20020186359
    Abstract: A lithography system and method for cost-effective device manufacture that can employ a new “flash-on-the-fly” mode of operation is disclosed, wherein exposure fields are formed with single pulses of radiation. The system includes a pulsed radiation source (14), an illumination system (24), a mask (M), a projection lens (40) and a workpiece stage (50) that supports a workpiece (W) having an image-bearing surface (WS). A radiation source controller (16) and a workpiece stage position system (60), which includes a metrology device (62), are used to coordinate and control the exposure of the mask with radiation pulses so that adjacent radiation pulses form adjacent exposure fields (EF). Where pulse-to-pulse uniformity from the radiation source is lacking, a pulse stabilization system (18) may be optionally used to attain the desired pulse-to-pulse uniformity in exposure dose.
    Type: Application
    Filed: May 10, 2001
    Publication date: December 12, 2002
    Inventors: Dan Meisburger, David A. Markle