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. 17, 1985
Filed:
Jul. 09, 1984
Applicant:
Inventors:
Arthur B Ellis, Madison, WI (US);
Michael K Carpenter, Madison, WI (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
C25F / ;
U.S. Cl.
CPC ...
2041293 ; 20412975 ;
Abstract
Semiconductor electrodes whose composition varies with distance from a surface and which varying composition provides different wavelengths of electroluminescence from the different compositions may be spatially and spectrally etched. When the semiconductors are immersed in electrolytic etching solutions, imagewise exposure to electromagnetic radiation will stimulate the etching of the semiconductor when the semiconductor is voltaically connected with an electrode.