Patents Assigned to Mitsui Mining & Smleting Co., Ltd.
  • Patent number: 5897761
    Abstract: An electrodeposited copper foil for use in the manufacture of a printed wiring board in which the original profile of the matte surface has been completely removed, preferably by buffing, leaving a surface having linear streaks and a roughness 1.5 .mu.m or less. The new surface is then given a nodule forming treatment which produces a surface roughness of 1.5 to 2.0 .mu.m, which may be followed by a corrosion resisting treatment. This invention further provides a method of manufacturing such an electrodeposited copper foil. Such copper foils are especially useful in making fine circuit patterns.
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: April 27, 1999
    Assignee: Mitsui Mining & Smleting Co., Ltd.
    Inventors: Hideyasu Tagusari, Yutaka Hirasawa, Kazuhide Oshima