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. 24, 2014
Filed:
May. 26, 2010
Applicants:
Dirk Tews, Berlin, DE;
Christian Sparing, Berlin, DE;
Martin Thoms, Berlin, DE;
Inventors:
Assignee:
Atotech Deutschland GmbH, Berlin, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01B 13/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed is a composition for and applying said method for micro etching of copper or copper alloys during manufacture of printed circuit boards. Said composition comprises a copper salt, a source of halide ions, a buffer system and a benzothiazole compound as an etch refiner. The inventive composition and method is especially useful for manufacture of printed circuit boards having structural features of ≦100 μm.