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Manufacturing method of metal paste

  • US 7,434,981 B2
  • Filed: 05/26/2005
  • Issued: 10/14/2008
  • Est. Priority Date: 05/28/2004
  • Status: Expired due to Fees
First Claim
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1. A manufacturing method of a metal paste having a viscosity of 60(Pa·

  • s) or larger at a measured value by a rotational viscometer rotating at a shear rate of 2s

    1
    , or 30(Pa·

    s) or larger at the measured value by the rotational viscometer rotating at a shear rate of 10s

    1
    , comprising;

    feeding a paste-like material containing a metal filler into a gap between whetstones which are relatively rotated while facing with each other,kneading, mixing and dispersing the paste-like material containing a metal filler while keeping the temperature of 40°

    C. to 80°

    C. so that the viscosity of the paste-like material containing a metal filler is within a range of 10 to 40(Pa·

    s) measured by the rotational viscometer rotating at a shear rate of 2s

    1
    , and within a range of 2 to 20(Pa·

    s) measured by the rotational viscometer rotating at a shear rate of 10s

    1
    ,and by adjusting a gap interval “

    dg”

    of the whetstones in a range of (⅕

    ) “

    dm”

    to 2 “

    dm”

    when the gap interval of the whetstones is represented by “

    dg” and

    a maximum particle size of the metal filler in the paste material is represented by “

    dm.”

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