PROCEDE D'EXTENSION D'UN TISSU CREPE UTILISE POUR PRODUIRE UNE FEUILLE ABSORBANTE

N° de brevet: EP1879736 (A2)
Date de publication: 2008-01-23
Inventeur(s): SUPER GUY H [US];EDWARDS STEVEN L [US];MCCULLOUGH STEPHEN J [US];MURRAY FRANK C [US];
Demandeur(s): GEORGIA PACIFIC CONSUMER PRODU [US];
Classification: B31F1/16;D21F11/00;
N° de demande: EP20060739068 20060321 
Numéro(s) de priorité: WO2006US10132 20060321;US20050108375 20050418 
A metallic copper and resin composite body manufacturing method of forming a copper wiring layer that forms an inner layer circuit, establishing an insulating layer with a resin on said wiring layer, forming via holes which expose the copper surface under the insulative layer, and depositing a metal on the copper surface that is exposed at the bottom of the via holes. The method includes a step of: removing copper oxide which forms on the surface of the copper that is exposed in the bottom of the via holes using a phosphoric acid aqueous solution with a pH between 1 and 3. The method suppresses haloing is and via holes with excellent solder bonding are formed. 



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