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:
Mar. 20, 2007
Filed:
Apr. 02, 2004
John A. Mcfarland, Scottsdale, AZ (US);
Michael A. Dodd, Chandler, AZ (US);
Wolfgang Sievert, Wunstorf, DE;
John A. McFarland, Scottsdale, AZ (US);
Michael A. Dodd, Chandler, AZ (US);
Wolfgang Sievert, Wunstorf, DE;
Honeywell International Inc., Morristown, NJ (US);
Abstract
Silicon oxide etching solutions containing the product of at least one bifluoride source compound dissolved in a solvent consisting of at least one carboxylic acid, and further comprising from about 0.5 to about 3 percent by solution weight of hydrofluoric acid and from about 1 to about 5 percent by solution weight of water, wherein the total concentration of bifluoride source compound is between about 1.25 and about 5.0 moles per kilogram of solvent. Methods for selectively removing silicon oxides and metal silicates from metal surfaces are also disclosed.