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:
Jul. 11, 2006
Filed:
Oct. 10, 2001
Gonzalo Urrutia Desmaison, Berlin, DE;
Stefan Kretschmer, Berlin, DE;
Gerd Senge, Berlin, DE;
Thorsten Ross, Berlin, DE;
Torsten Küssner, Berlin, DE;
Gonzalo Urrutia Desmaison, Berlin, DE;
Stefan Kretschmer, Berlin, DE;
Gerd Senge, Berlin, DE;
Thorsten Ross, Berlin, DE;
Torsten Küssner, Berlin, DE;
Atotech Deutschland GmbH, Berlin, DE;
Abstract
In the production of printed circuit boards it is required that organic protective coatings adhere tightly on the copper surfaces. Accordingly, matt layers of copper are to be preferred over lustrous coatings. The bath in accordance with the invention serves to deposit matt layers of copper and has the additional advantageous property that the layers may also be deposited with sufficient coating thickness in very narrow bore holes at average cathode current density. For this purpose the bath contains at least one polyglycerin compound selected from the group comprising poly(1,2,3-propantriol), poly(2,3-epoxy-1-propanol) and derivatives thereof.