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:
Apr. 20, 1999
Filed:
Dec. 23, 1996
Applicant:
Inventor:
Yoshihisa Muranushi, Yokohama, JP;
Assignee:
Atotech USA, Inc., , NJ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C25D / ; C25D / ; C23F / ;
U.S. Cl.
CPC ...
205210 ; 205172 ; 205183 ; 205261 ; 205214 ; 216102 ; 216104 ; 216109 ; 148275 ;
Abstract
An iron immersion composition of matter is disclosed comprising a compound having a divalent or trivalent iron ion, a compound having a fluoride ion, and a compound having an acid hydrogen ion. A process for treating an aluminum substrate to improve the adhesion of metal layers to the substrate is also disclosed comprising contacting the substrate with the acidic iron immersion composition to produce an iron immersion coating on the alloy, and contacting the iron immersion coating with an etchant to substantially remove the coating and produce a microporous surface on the substrate.