Patents by Inventor Peter P. Longo

Peter P. Longo 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).

  • Method for minimizing sample damage during the ablation of material using a focused ultrashort pulsed laser beam
    Publication number: 20020125230
    Abstract: In one aspect the invention provides a method for laser induced breakdown of a material with a pulsed laser beam where the material is characterized by a relationship of fluence breakdown threshold (Fth) versus laser beam pulse width (T) that exhibits an abrupt, rapid, and distinct change or at least a clearly detectable and distinct change in slope at a predetermined laser pulse width value. The method comprises generating a beam of laser pulses in which each pulse has a pulse width equal to or less than the predetermined laser pulse width value. The beam is focused above the surface of a material where laser induced breakdown is desired.
    Type: Application
    Filed: August 20, 2001
    Publication date: September 12, 2002
    Applicant: International Business Machines Corporation
    Inventors: Richard Alan Haight, Peter P. Longo, Daniel Peter Morris, Alfred Wagner
  • Method for minimizing sample damage during the ablation of material using a focused ultrashort pulsed beam
    Patent number: 6333485
    Abstract: In one aspect the invention provides a method for laser induced breakdown of a material with a pulsed laser beam where the material is characterized by a relationship of fluence breakdown threshold (Fth) versus laser beam pulse width (T) that exhibits an abrupt, rapid, and distinct change or at least a clearly detectable and distinct change in slope at a predetermined laser pulse width value. The method comprises generating a beam of laser pulses in which each pulse has a pulse width equal to or less than the predetermined laser pulse width value. The beam is focused above the surface of a material where laser induced breakdown is desired.
    Type: Grant
    Filed: December 11, 1998
    Date of Patent: December 25, 2001
    Assignee: International Business Machines Corporation
    Inventors: Richard Alan Haight, Peter P. Longo, Daniel Peter Morris, Alfred Wagner