Mec Company Ltd.

Ryo Ogushi

Toshiko Nakagawa

Daisaku Akiyama

Kaoru Urushibata

Masayo Kuriyama

Minoru Otani

Provided are a surface roughening agent for aluminum and a surface roughening method using said surface roughening agent wherein it is possible to easily reduce costs for the surface roughening step and to improve the adhesiveness between aluminum and a resin. Specifically, provided is a surface roughening agent for aluminum comprising an aqueous solution containing: an alkali source, an amphoteric metal ion, a nitrate ion, and a thio compound. Moreover, provided is a surface roughening method for aluminum which involves a surface roughening step in which the surface of aluminum is treated with the aforementioned surface roughening agent.

Surface roughening agent for aluminum, and surface roughening method using said surface roughening agent

An etchant of the present invention includes an aqueous solution containing hydrochloric acid, nitric acid, and a cupric ion source. An etching method of the present invention includes bringing the etchant into contact with at least one metal selected from nickel, chromium, nickel-chromium alloys, and palladium. Another etching method of the present invention includes bringing a first etchant that includes an aqueous solution containing at least the following components A to C (A. hydrochloric acid; B. at least one compound selected from the following (a) to (c): (a) compounds with 7 or less carbon atoms, containing a sulfur atom(s) and at least one group selected from an amino group, an imino group, a carboxyl group, a carbonyl group, and a hydroxyl group; (b) thiazole; and (c) thiazole compounds; and C. a surfactant) into contact with a surface of the metal, and then bringing a second solution that includes an aqueous solution containing hydrochloric acid, nitric acid, and a cupric ion source into contact with the surface of the metal. According to the etchant and the etching methods of the present invention, it is possible to etch at least one metal selected from nickel, chromium, nickel-chromium alloys, and palladium quickly and suppress excessive dissolution of copper.

Etchant and replenishment solution therefor, and etching method and method for producing wiring board using the same

A method for bonding a resin which has a high glass transition temperature but low affinity to copper surfaces with a copper surface with sufficient adhesive strength. The method comprises coating the copper surfaces with an aqueous solution containing at least 0.05% of aminotetrazole or an aminotetrazole derivative, or an aqueous solution containing at least 0.05% of aminotetrazole or an aminotetrazole derivative and at least 0.1% of aminotriazole or an aminotriazole derivative.

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Amagasaki, Japan

Ryo Ogushi