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:
Dec. 16, 1986
Filed:
Mar. 12, 1985
Alan M Kadin, Troy, MI (US);
Robert W Burkhardt, Birmingham, MI (US);
Energy Conversion Devices, Inc., Troy, MI (US);
Abstract
Methods are provided for analyzing multilayer structures. The multilayer structure is electrolytically anodized at constant current through a plurality of layers of the structure over a predetermined surface area. During the anodization, the change of the anodization voltage or a time derivative thereof as a function of time is monitored as the anodization through the layers occurs to obtain data. The data may be analyzed in several ways to determine whether degradation of the multilayer structure has occurred, to determine the number of layers present in the multilayer structure and to determine the layer thickness of the multilayer structure. The disclosed methods are accurate, inexpensive and rapid.