Atotech Deutschland Gmbh

Nissan Motor Company Limited

Grant Keers

Hiroshi Sakai

Soichiro Sugawara

Jens-Eric Geissler

Kevin Schell

Hiroaki Koyasu

Shakeel Akhtar

An nickel plating layer () intended for corrosion current distribution is formed over a body (), and a 0.05 to 2.5 micrometers thick surface chrome plating layer () made of trivalent chromium is formed on the surface thereof using basic chromium sulfate as a source of metal. Further on the same, a not less than 7 nm thick chromium compound film () is formed by cathode acidic electrolytic chromatin. The corrosion distribution nickel plating layer () has a function of forming a microporous structure, a microcrack structure, or the both of the same in the surface chrome plating layer ().

Chrome-plated part and manufacturing method of the same

The present invention is directed to the fabrication of rigid memory disks, including a metal plating composition which impedes deposition of non-metallic particles during a plating process. The plating composition includes at least one sulfated fatty acid ester additive, or mixtures or salts thereof, of formula: wherein R1 is selected from the group consisting of OH, OCH, HCH, C1-C7 alkyl, linear or branched; R2 selected from H and C1-C7 alkyl, linear or branched; m=1 to about 5; n=2 to about 30; o=0 to about 10; M+ is a metal or pseudo metal ion or H+. The additive has a zeta potential which impedes deposit of non-metallic particles. The invention is further directed to a method for electroless plating utilizing the additive composition in a bath with at least a stabilizing agent, complexing agent and reducing agent and source of metal ions.

Metal plating additive, and method for plating substrates and products therefrom

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Fort Mill, SC, United States of America

Grant Keers