A METHOD FOR INCREASING ADHESION STRENGTH BETWEEN A SURFACE OF COPPER OR COPPER ALLOY AND AN ORGANIC LAYER

• Main Authors: TEWS, Dirk, HONDA, Toshio, HAHN, Aaron, THOMS, Martin, SCHMIDT, Gabriela, CHO, Wonjin, LAGER, Markku, TANG, Felix, KLOPPISCH, Mirko, LÜTZOW, Norbert
• Format: Patent
• Language: English
• Published: 12.08.2021
• Subjects: CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; METALLURGY; PRINTED CIRCUITS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

The present invention relates to a method for increasing adhesion strength between a surface of copper or copper alloy and an organic layer, the method comprising in this order the steps:(i) providing a non-conductive substrate comprising on at least one side said surface, said surface having a total surface area of copper or copper alloy,(ii) contacting said substrate comprising said surface with an acidic aqueous non-etching protector solution comprising(ii-a) one or more than one amino azole,(ii-b) one or more than one organic acid and/or salts thereof,(ii-c) one or more than one peroxide in a total amount of 0.4 wt-% or less, based on the total weight of the protector solution, and(ii-d) inorganic acids in a total amount of 0 to 0.01 wt-%, based on the total weight of the protector solution,wherein during step (ii) the total surface area of said surface is not increased upon contacting with the protector solution.