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:
Jun. 09, 2009
Filed:
Oct. 28, 2005
Applicant:
Wai Mun Lee, Fremont, CA (US);
Inventor:
Wai Mun Lee, Fremont, CA (US);
Assignee:
EKC Technology, Inc., Hayward, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C11D 7/50 (2006.01);
U.S. Cl.
CPC ...
Abstract
Improved compositions and processes for removing photoresists, polymers, post etch residues, and post oxygen ashing residues from interconnect, wafer level packaging, and printed circuit board substrates are disclosed. One process comprises contacting such substrates with mixtures containing an effective amount of organic ammonium compound(s); from about 2 to about 20 weight percent of oxammonium compound(s); optionally organic solvent(s); and water.