FILME UND BESCHICHTUNGEN MIT ANISOTROPISCH LEITENDEN BAHNEN DARIN

The present invention discloses an anisotropically conductive film or a substrate having a surface covered with an anisotropically conductive coating, said film or coating being formed by solidification of a composition comprising: (i) a solidifiable ferrofluid composition, the ferrofluid comprising a ferromagnetic particle colloidal suspension in a non-magnetic carrier, and (ii) a plurality of electrically conductive particles dispersed in said ferrofluid, the electrically conductive particles having a non-random pattern arrangement by application of a substantially uniform magnetic field to the composition, in a liquid state, and being securely positioned by solidification of said composition. The composition is solidified in a step A of a process, which usually involves a primary curing. In a final use application of the particle or coating, the composition usually is subjected to a step B, or secondary curing. The film or substrate so coated is suitable as an article for the manufacture of joint conductors in the electrical industry.