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:
Aug. 03, 1993
Filed:
Sep. 04, 1990
Frank J Juskey, Coral Springs, FL (US);
Anthony B Suppelsa, Coral Springs, FL (US);
Kenneth M Wasko, Boca Raton, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A non-hardening, solvent removable hydrophobic conformal coating is provided for electronic devices, such as printed circuit boards. The coating material comprises a metal alkyl benzyl sulfonate, together with a carrier and a solvent. The metal alkyl benzyl sulfonate may include compounds such as calcium eicosanylbenzyl sulfonate. The carrier may be any oxidized hydrocarbon, such as lauryl ethanoxylate, for example, and the solvent may be any low boiling aliphatic hydrocarbon. Though the coating is impervious to water, it may be readily and selectively removed using a small quantity of a non-polar organic solvent, such as mineral spirits or terpenes. Thus, although the electronic device is protected from corrosion, electromigration and physical harm by the coating, the coating may be easily, quickly and selectively removed in the event a component needs replacement, repair or adjustment.