Electrically conductive adhesive web
AssigneeMinnesota Mining and Manufacturing Company
InventorsClyde D. Calhoun, David C. Koskenmaki
Life of this patent
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Abstract
Electrical conductive adhesive tapes comprising at least one carrier web having a low-adhesion face bearing thereon an adhesive layer having substantially uniform thickness and a Lap Shear Value from aluminum of at least 0.2 MPa, said tape being formed having a plurality of perforations, each perforation containing a plurality of electrically conductive particles in contact with the adhesive layer which is otherwise substantially free from electrically conductive material.
Claims20
An electrically conductive adhesive transfer tape capable of joining two electrically conductive surfaces comprising an adhesive layer, said layer having two faces, each of said faces being releasably attached to a carrier web, said layer having a substantially uniform thickness and a lap shear value from aluminum of at least 0.2 MPa, said tape having a plurality of perforations extending completely through said adhesive layer and said carrier webs, each of said perforations containing conductive particles and an adhesive binder that form conductive columns, said columns protruding above said adhesive layer to a height equal to the thickness of said carrier webs, said columns being protected from collapsing by said carrier web when said tape is wound into a roll, said adhesive layer being otherwise substantially free of electrically conductive particles.
An electrically conductive adhesive transfer tape comprising an adhesive layer and a carrier web, wherein said adhesive layer softens and flows at a bonding temperature and pressure, said layer having a substantially uniform thickness and a lap shear value from aluminum of at least 0.2 MPa, said carrier web having a plurality of perforations extending completely therethrough, each of said perforations containing a plurality of conductive particles, said adhesive layer being substantially free of electrically conductive particles.
An electrically conductive adhesive transfer tape comprising a reworkable thermoset resin adhesive layer having a substantially uniform thickness and a lap shear value from aluminum of at least 0.2 MPa, said adhesive layer having two faces, and a carrier web releasably attached to at least one of said faces, said tape having a plurality of perforations extending completely through said adhesive layer and said carrier web, each perforation containing a plurality of conductive particles, said adhesive layer being otherwise substantially free of electrically conductive particles.
Dependencies are inferred from the claim text.