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. 26, 1995
Filed:
Feb. 08, 1994
Applicant:
Inventors:
Del R Lawson, Inver Grove Heights, MN (US);
Jeffrey A Boettcher, Falcon Heights, MN (US);
Lanny L Harklau, Stillwater, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
2504591 ; 250302 ; 2504581 ; 356381 ;
Abstract
A method and system is disclosed for measuring a functional characteristic of one or more thin film coatings applied to a thin film using a photoisomer. A photoisomer is mixed into each functional coating in known amounts. Photodetection of the photoisomer as a part of the functional coatings is used to control a functional characteristic of the thin film during the manufacturing process. The photoisomer is activated with light of a selected wavelength range, and light fluorescence is measured in another selected wavelength range.