Abstract:
A conductive adhesive, such as an anisotropic conductive adhesive, comprising a population of conductive particles and a population of signal particles in an adhesive; wherein both the conductive particle population and the signal particle population have an average particle diameter of
Abstract:
A particle 10 for use in a conductive adhesive 20 is provided. The particle 10 comprises a core1having a core diameter. The core is formed of a first material having a first elastic modulus. The particle 10 further comprises a shell 2 around the core 1 which is formed of a second material having a second elastic modulus. The core diameter is greater than or equal to 50% of the particle diameter. The first elastic modulus is greater than the second elastic modulus.
Abstract:
A heat-treated polymer particle comprising an addition polymer core particle which has had swollen and polymerised therein a blend of an aromatic alcohol with an aldehyde or a blend of an aromatic amine or urea with an aldehyde and which has been subsequently heat treated, e.g. to a temperature of at least 150°C.
Abstract:
A method of applying a conductive adhesive comprising: using a conductive adhesive 18 made up of conductive beads 12 in an adhesive matrix 8, the conductive beads comprising a polymer core and a conductive coating and having a maximum dimension of 100 µm or less; and depositing droplets of the adhesive 18 on a substrate via a nozzle 20.
Abstract:
An isotropic conductive adhesive comprises silver coated polymer beads 12 within an adhesive matrix 8, wherein the mean average diameter of the polymer cores of the beads 12 is 5 µm or greater and less than 30 µm, and wherein the silver coating comprises interlinked silver deposits grown from dispersed nucleation sites scattered across the surface of the beads.
Abstract:
A process for the preparation of an activated polymer particle comprising contacting a polymer particle with at least one polyamine, wherein said polyamine has three or more amino groups, to form a surface treated polymer particle; and applying a catalyst to the surface treated polymer particle to form an activated polymer particle.