The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 2008
Filed:
Jun. 28, 2005
Ronald Joseph Kitzhoffer, Easton, PA (US);
Scott Jeffrey Weigel, Allentown, PA (US);
Charles Gardner Coe, Macungie, PA (US);
Michael Francis Kimak, Allentown, PA (US);
James Edward Macdougall, New Tripoli, PA (US);
John Francis Kirner, Orefield, PA (US);
Ronald Joseph Kitzhoffer, Easton, PA (US);
Scott Jeffrey Weigel, Allentown, PA (US);
Charles Gardner Coe, Macungie, PA (US);
Michael Francis Kimak, Allentown, PA (US);
James Edward MacDougall, New Tripoli, PA (US);
John Francis Kirner, Orefield, PA (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
A method and apparatus for determining pore size distribution and/or the presence of at least one killer pore in at least a portion of a porous film deposited upon a substrate are disclosed herein. In one embodiment, there is provided a method for determining pore size distribution comprising: providing the substrate having the film deposited thereupon wherein the film comprises pores and wherein the pores have a first volume; exposing the film to an adsorbate at a temperature and a pressure sufficient to provide condensation of the adsorbate in pores and wherein the pores after the exposing step have a second volume; and measuring the difference between the first and the second volume using a volumetric technique; and calculating the pore size and pore volume using the change in the first and the second volume, the pressure, and a model that relates pressure to pore diameter.