Patents by Inventor Mark D. Matthews

Mark D. Matthews 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 of treating particles
    Patent number: 5462639
    Abstract: Particles (10) contained in a mass of liquid etchant (12) and being wetted and etched thereby are moved into a mass of an inert, etching-terminating liquid (14) which abuts the etchant mass by overcoming surface tension forces exerted on the particles by the etchant at the interface (16,70) of the liquid masses. A vortex (24) of the inert liquid (14) is forced and in turn forces a conformal vortex (60) of the etchant (12) with the particles (10) therein. Turbulence at the interface (70) of the vortices (24,60) and vortex-generated centrifugal force on the particles (10) overcome the surface tension forces, and the particles move into the inert liquid (14).
    Type: Grant
    Filed: January 12, 1994
    Date of Patent: October 31, 1995
    Assignee: Texas Instruments Incorporated
    Inventors: Mark D. Matthews, Louanne K. Brown
  • Method of treating adherent semiconductor particles to break them apart
    Patent number: 5413285
    Abstract: Adherent silicon spheres (10) are broken apart into separate spheres by entraining them in a high velocity gas stream (12) which is directed at a surface (20). When the adherent spheres (10) impact on the surface (20) they break apart. The gas (12) and the separated spheres (10) are directed away from the surface (20) along divergent paths and the spheres (10) are collected for use.
    Type: Grant
    Filed: January 12, 1994
    Date of Patent: May 9, 1995
    Assignee: Texas Instruments Incorporated
    Inventors: Mark D. Matthews, Johnny Langley