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Electrically conductive compositions and methods for the preparation and use thereof

  • US 5,830,389 A
  • Filed: 10/17/1994
  • Issued: 11/03/1998
  • Est. Priority Date: 02/09/1990
  • Status: Expired due to Term
First Claim
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1. A composition of matter comprising:

  • greater than 0 up to 65% of a high melting point metal, wherein the high melting point metal is selected from the group consisting of copper, silver, aluminum, gold, platinum, palladium, beryllium, rhodium, nickel, cobalt, iron, molybdenum, and alloys thereof;

    6-65% of a solder, wherein said solder is selected from the group consisting of Sn, Bi, Pb, Cd, Zn, Ga, In, Te, Hg, To, Sb, Se, and alloys thereof;

    0-45% of a resin;

    0.01-61% of a chemically protected cross-linking agent with fluxing properties which is reactive only at or near the time at which the solder is melted,wherein said chemically protected cross-linking agent is an acid or a strong base, wherein said acid or strong base is selected from the group consisting of anhydrides, carboxylic acids, amides, amines and phenols, andwherein said acid or strong base is protected by a protecting group selected from the group consisting of carboxylic acids, alcohols, glycols and polyols; and

    0-50% of a reactive monomer or polymer,wherein all percentages referred to herein are based on volume.

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