Patent ID: 11963308
Assignee: ATOTECH DEUTSCHLAND GMBH & CO. KG
Field: Surface technology, coating (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 0:
1. 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) one or more than one inorganic acid 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, and
wherein the protector solution is substantially free of chloride and fluoride ions.