The invention concerns a component for biological or biochemical analysis microsystems formed from a support and having at least one chemically functionalised surface zone, in order to allow in said zone the formation of a chemistry for anchoring biological or biochemical elements, and/or electrically, in order to allow in said zone the formation of electrical charges. The support comprises at least one part (21) formed of a composite material, said composite material being a mixture of at least one inert material and at least one chemically and/or electrically functionalisable material to provide said functionalised surface zone.