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:
Jul. 17, 2001
Filed:
Mar. 02, 1998
Michael D. Frederickson, Indianapolis, IN (US);
Jeff K. Latham, New Castle, IN (US);
Alex E. Cragoe, Indianapolis, IN (US);
American Competitiveness Institute, Inc., Plymouth Meeting, PA (US);
Abstract
An impedance spectroscopy system characterizes the rheologic and thixotropic properties of solder paste and residues by measuring its impedance at various frequencies. The impedance spectroscopy system provides voltage and current inputs to a sample at various frequencies and measures the resulting impedance. The impedance spectroscopy system stores equivalent circuit parameters for multiple solder pastes and residues, controls the voltage and current inputs to the sample, displays measurement data in real-time, displays results, and notifies the operator if results exceed preset limits.