METHOD OF PREPARING A PRINTED CIRCUIT

    公开(公告)号:DE3171502D1

    公开(公告)日:1985-08-29

    申请号:DE3171502

    申请日:1981-10-27

    Applicant: IBM

    Abstract: A copper foil having at least one nodular surface is contacted with an oxidizing composition for a length of time sufficient to oxidize said nodular surface of said copper foil further to roughen said nodular surface. The oxidizing composition e.g. consists of an aqueous alkaline solution of alkali metal chlorite, said solution containing said chlorite in a concentration of about 2 percent to about 10 percent, and alkali metal hydroxide in a concentration of about 0.3 percent to about 0.7 percent. … The copper foil resulting from the oxidizing treatment is useful as a sacrificial metal layer in producing metal plated substrates by creating an irregular surface on the dielectric substrate employed and it is applicable in the preparation of printed circuits.

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