6.
    发明专利
    未知

    公开(公告)号:BR8904585A

    公开(公告)日:1990-04-24

    申请号:BR8904585

    申请日:1989-09-12

    Abstract: Compositions which include an acidified epoxy oligomer, a free radical photoinitiator and a monomer capable of being polymerized by the photoinitiator are used to form aqueous developable, photodefined coatings useful as permanent solder masks for printed circuits and permanent plating resists for additive printed wiring boards. The process for using the compositions include application as a fluid in solvents; drying; exposing to ultraviolet light; developing in an aqueous alkaline solution; and crosslinking the acidified, epoxy oligomers. The articles produced include printed wiring boards with the permanent, photoimaged resist composition thereon.

    7.
    发明专利
    未知

    公开(公告)号:DE3930586A1

    公开(公告)日:1990-03-22

    申请号:DE3930586

    申请日:1989-09-13

    Abstract: Compositions which include an acidified epoxy oligomer, a free radical photoinitiator and a monomer capable of being polymerized by the photoinitiator are used to form aqueous developable, photodefined coatings useful as permanent solder masks for printed circuits and permanent plating resists for additive printed wiring boards. The process for using the compositions include application as a fluid in solvents; drying; exposing to ultraviolet light; developing in an aqueous alkaline solution; and crosslinking the acidified, epoxy oligomers. The articles produced include printed wiring boards with the permanent, photoimaged resist composition thereon.

    SENSITIZED SUBSTRATES
    9.
    发明专利

    公开(公告)号:AU4502172A

    公开(公告)日:1974-01-31

    申请号:AU4502172

    申请日:1972-07-26

    Abstract: There are provided new articles of manufacture, suitable for the production of metallized bodies, such as printed circuits, dials, nameplates, metallized plastics, glass, ceramics and the like, comprising bases coated with a layer of copper, nickel, cobalt or iron salts or salt compositions, which on exposure to radiant energy, such as heat, light, etc., or chemical reducing agents is converted to a layer of metal nuclei which is non-conductive, but which is capable of catalyzing the deposition of metal onto the base from an electroless metal deposition solution in contact with the metal nuclei.

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