Flexible tape having bridges of electrically conductive particles extending across its pressure-sensitive adhesive layer
First Claim
1. Flexible tape that can adhesively make individual electrical connections between multiple pairs of electrodes without short circuiting electrodes of either array, said tape comprising a pressure-sensitive adhesive layer containing electrically conductive particles in an amount providing less than ten percent by volume of the layer, each of the particles having a ferromagnetic core and an electrically conductive surface, the maximum dimension of substantially every particle being less than the thickness of the layer, the particles together forming a large number of discrete, electrically conductive bridges extending through the thickness of the layer, the adhesive between individual bridges rendering the layer laterally nonconductive.
1 Assignment
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Accused Products
Abstract
Flexible tape having a pressure-sensitive adhesive layer containing particles, each particle having a ferromagnetic core and an electrically conductive surface. By virtue of the ferromagnetic cores, the particles can be magnetically attracted to form a large number of discrete electrically conductive bridges extending through the thickness of the adhesive layer. The tape can be used both to bond together and to electrically connect individual members of facing arrays of electrodes.
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Citations
20 Claims
- 1. Flexible tape that can adhesively make individual electrical connections between multiple pairs of electrodes without short circuiting electrodes of either array, said tape comprising a pressure-sensitive adhesive layer containing electrically conductive particles in an amount providing less than ten percent by volume of the layer, each of the particles having a ferromagnetic core and an electrically conductive surface, the maximum dimension of substantially every particle being less than the thickness of the layer, the particles together forming a large number of discrete, electrically conductive bridges extending through the thickness of the layer, the adhesive between individual bridges rendering the layer laterally nonconductive.
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6. Flexible tape as defined in claim 6 wherein the coating comprises silver.
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13. Method of making a flexible multiple-connector tape comprising the sequential steps of:
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(1) coating onto a flexible carrier web a mixture of low-viscosity photopolymerizable monomer and particles, each particle having a ferromagnetic core and an electrically conductive surface, the maximum dimension of substantially every particle being less than the ultimate thickness of the coating, (2) then simultaneously (a) subjecting the coating to a magnetic field extending substantially orthogonally to the coating and of a strength sufficient to attract the particles to form a large number of discrete bridges, each extending through the thickness of the coating, and (b) polymerizing the monomer to fix the bridges of particles within a pressure-sensitive layer which is laterally nonconductive, and (3) removing the tape from the magnetic field. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. Flexible tape that can adhesively bond an assemblage of electronic components to a heat sink to which heat from the assemblage can be carried off, said tape comprising a pressure-sensitive adhesive layer containing thermally conductive, electrically insulative particles in an amount providing less than ten percent by volume of the layer, each of the particles having a ferromagnetic core and an electrically insulative oxide surface, the maximum dimension of substantially every particle being less than the thickness of the layer, the particles together forming thermally conductive bridges extending through the thickness of the layer.
Specification