Abstract:
An electroconductive adhesive layer of high molecular weight resin having electroconductive particles disposed therein is electrodeposited selectively on only the electroconductive circuit povided on a flexible circuit substrate. The adhesive layer permits precise bonding of the coated circuit with an identical circuit provided on a second flexible circuit substrate.
Abstract:
An anisotropically conductive adhesive composition (10) for use in electrically connecting at least one conductive area (14) on one substrate (12) with at least one conductive area (20) on a second substrate (18) is disclosed. The composition (10) is comprised of a mixture of conductive particles and a nonconductive adhesive binder (26). The conductive particles are dispersed throughout the binder in a plurality of noncontiguous conductive units (24) such that, upon applying a layer (30) of the composition (10) over both the conductive and insulating areas (14, 16) on one substrate (12) and positioning in a conducting relationship and adhering said at least one conductive area (20) on the second substrate (18) with said at least one conductive area (14) on the first substrate (12), the units (24) establish electrical connection between the adhered conductive areas (14, 20) on the two substrates (12, 18). The units (24) are sufficiently spaced apart, however, to preclude electrical conductivity between adjacent areas on the same substrate. A method for electrically connecting conductive areas on two substrates by means of said anisotropically conductive adhesive composition (10) and products produced by said method are also disclosed.
Abstract:
An electrically conductive adhesive composition which provides electric conductivity between facing electrodes but maintains electric insulation in the lateral direction across the facing direction, said composition comprising (a) a nonconductive base resin and (b) electrically conductive particles incorporated and dispersed in the resin (a); wherein(I) said electrically conductive particles (b) are composed of(b-1) 10 to 75%, based on the total weight of the components (a), (b-1) and (b-2), of abrasive grain-like electrically conductive particles having an average particle diameter of at least 1 micrometer, and(b-2) 0.2 to 20% by weight, based on the total weight of the components (a), (b-1) and (b-2), of electrically conductive fine particles having an average particle diameter of not more than 0.5 micrometer, and(II) said electrically conductive adhesive composition contains a solvent for said base resin (a) in an amount required to form said composition into the state of a printing ink or a paint.
Abstract:
An electrically conductive adhesive comprises electrically conductive particles mixed in a non-conductive base at such a mixing ratio that the conductive particles are not in contact with one another. When this adhesive is disposed between facing electrodes, it provides electric conductivity between the facing electrodes but maintains electric insulation in the lateral direction.
Abstract:
A method for improving electrical conductivity and/or adhesion of an electrical coupling formed in a metal foil conductor, the metal foil conductor being formed by the reel to reel technique on a flexible substrate, comprises exposing the metal foil conductor, at least over the area of the electrical coupling that is to be formed, to an active agent that chemically modifies, removes or replaces the natural oxide, oxyhydroxide and/or hydroxide layer on the surface of the metal foil conductor to improve the electrical conductivity and/or adhesion ability. The electrical coupling is formed over the area of the metal foil conductor which is modified by the active agent or where the oxide, oxyhydroxide and/or hydroxide layer has been removed or replaced with said active agent. A component binding adhesive, an electrically conductive paste and/or an electrically conductive coating comprise as a blending element an active agent that chemically modifies, removes or replaces the natural oxide, oxyhydroxide and/or hydroxide layer on the surface of the metal foil conductor to improve the electrical conductivity and adhesion ability.
Abstract:
The present invention comprises an electrical contact (84) having solid homogeneous conductive particles on the contact (84) surface. The particles are of greater hardness than that of the contact (84) material to deform the contact (84) material and cause breakage or fracture of the oxide or other contaminating layer, or to penetrate the contaminating layer. The particles are applied to the contact (84) surface by a technique which results in the particles being intimately bonded to the contact (84) surface, usually as a layer of particles. A preferable technique for such particle application is hypervelocity oxygen fuel spraying (HVOF) or plasma spraying, by which the particles are embedded on the contact (84) surfaces to provide a substantially permanent interparticle bond between the applied particles and the contact (84) material.
Abstract:
A connection terminal portion of a substrate and a terminal portion of an external circuit substrate or a terminal portion of a part are electrically connected together using an anisotropic electrically conducting film. A structure in which a first substrate (100) having a connection terminal portion (31) and a second substrate (200) having a connection terminal portion (13) or a connection terminal portion of a part are connected together with an anisotropic electrically conducting adhesive (22) containing electrically conducting particles (21), wherein the thickness of the electrically conducting film (14) provided for the connection terminal of the first substrate (100), the second substrate (200) or the part is smaller than the diameter of the electrically conducting particles (21). The invention is further concerned with a method of accomplishing the electrical connection.