Conductive adhesive bonding means

Details Conductive adhesive bonding means Conductive adhesive bonding means

1996-04-25

1998-04-21

Powell, William

Etching a substrate: processes

Adhesive or autogenous bonding of two or more...

Etching improves or promotes adherence of preforms being bonded

216 20, B44C 122

Patent

active

057414300

ABSTRACT:
A method of electrically and mechanically bonding conductive surfaces with conductive adhesives, wherein at least one of the conductive surfaces is of the type upon which unstable oxides readily form. The conductive adhesives having a predetermined amount of conductive particles. The conductive particles having a rigidity at least as hard as the materials composing the conductive surfaces and any oxide formed thereon. The bonding method including the step of preparing the conductive surfaces so that a microscopically roughened oxide surface is formed thereon. The method further including the step of simultaneously applying a predetermined amount of heat and pressure to cure the conductive surface-conductive adhesive-conductive surface joint such that the conductive particles in the conductive adhesive pierce through the oxide to make direct contact with the conductive surfaces thereunder. The method controls the mechanical strength of the bond and the electrical characteristics of the bond joint. The electrical characteristics include joint resistivity and joint sensitivity to elevated temperature and/or humidity conditions.

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