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:
May. 04, 2004
Filed:
Feb. 22, 2002
Applicant:
Inventors:
Joseph A. Abys, Howell, NJ (US);
Frank Stanley Humiec, Fair Lawn, NJ (US);
Kenneth J. Murski, West Milford, NJ (US);
Yun Zhang, Warren, NJ (US);
Assignee:
Lucent Technologies Inc., Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D 3/60 ; C25D 3/34 ; C25D 3/32 ; C23C 1/600 ; C23C 1/800 ;
U.S. Cl.
CPC ...
C25D 3/60 ; C25D 3/34 ; C25D 3/32 ; C23C 1/600 ; C23C 1/800 ;
Abstract
In accordance with the invention, the volatility of a solder plating bath with volatile brighteners such as aldehydes has its volatility reduced by the addition of diols to the bath. The diols are advantageously 1,3 propanediol or 1,2 propanediol and are accompanied by lower molecular weight alcohols. In a preferred embodiment, a diol along with low alcohol is added to a bath comprising sulfonic acid, surfactant, grain refiner and brightening agents comprising an aromatic aldehyde and a carboxylic acid.