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. 07, 1999
Filed:
Mar. 30, 1998
Applicant:
Inventors:
Chiu H Ting, Saratoga, CA (US);
Peter Cho, Los Angeles, CA (US);
Frank Lin, Fremont, CA (US);
Tanya Andryushchenko, Cupertino, CA (US);
Assignee:
Cutek Research, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C25D / ;
U.S. Cl.
CPC ...
205101 ; 205291 ;
Abstract
A copper replenishment system for replenishing copper which is depleted from a copper plating solution. The replenishment is achieved by the use of a compact filter cartridge, which is inserted into a recirculating loop for the solution. The filter cartridge contains a chemical, which when reacting with the solution replenishes the copper into the solution. The filter cartridge is a compact unit which can be easily handled and reduces the amount of contaminants that could be introduced by the presence of the replenishment chemical.