MANUFACTURE OF PRINTED WIRING BOARD PROVIDED WITH PLATED RESISTOR

    公开(公告)号:JPH10135608A

    公开(公告)日:1998-05-22

    申请号:JP28324097

    申请日:1997-10-16

    Applicant: MACDERMID INC

    Abstract: PROBLEM TO BE SOLVED: To form a printed circuit board provided with a plated resistor which is unified in a body with a circuit, by eliminating exposed copper by etching, plating an exposed region by using a mask for plating, and eliminating the mask for plating by stripping. SOLUTION: The surface of a copper-coated laminate having an insulating dielectric substratum 10 and a stuck copper foil 11 is eliminated by etching. By stripping resist 12, the surface of an arbitrarily exposed dielectric material surface is made uniform. Thereon a mask for plating is so applied that resist 15 for plating covers the whole surface except the region where a resistor 16 is to be plated. By stripping the mask for plating, the surface of a printed circuit board is arbitrarily cleaned, and a plated resistor 16 is covered with a protective film. Thereby the printed circuit board provided with a plated resistor 16 unified in a body with a circuit can be formed.

    METHOD FOR IMPROVING SOLDERABILITY OF SURFACE

    公开(公告)号:JP2000246432A

    公开(公告)日:2000-09-12

    申请号:JP2000043546

    申请日:2000-02-16

    Applicant: MACDERMID INC

    Abstract: PROBLEM TO BE SOLVED: To provide a method improving the solderability of the surface of a metal. SOLUTION: The surface of a metal is processed by immersion silver plating solution. The solution contains a) soluble source of silver ion, b) acid, c) aliphatic amine, aliphatic amide, quaternary salt, amphoteric salt, resin shape amine. resin shape amide, fatty acid, resin shape acid, ethoxyl conversion substance of an arbitrary one out of the above substances, propoxyl conversion substance of an arbitrary one out of the above substances and additives selected from a group consisting of the mixture of arbitrary ones out of the above substances.

    7.
    发明专利
    未知

    公开(公告)号:DE68926622D1

    公开(公告)日:1996-07-11

    申请号:DE68926622

    申请日:1989-11-20

    Applicant: MACDERMID INC

    Abstract: A composition for stripping tin, lead or solder, as well as any underlying copper-tin alloy, from copper surfaces, containing an alkane sulfonic acid, preferably methane sulfonic acid, an inorganic nitrate, preferably ferric nitrate, and an inhibitor component. The composition effects rapid stripping without any appreciable formation of sludge or precipitate or suspended particles, and without any substantial attack on the underlying copper surface.

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