An aerosol generator assembly comprising a vibratable piezo ceramic body (2) having first and second opposing sides, an aperture (o) defined in the vibratable body and extending through the body from the first side to the second side and having a layer of electrical contact material on each side of the vibratable body, the vibratable body being vibratable by application of an electrical signal thereto； a vibratable member (1) with pores defined therein, the vibratable member mounted across the aperture； and an electrical contact material free-zone (4) is provided on at least one side of the body about the aperture, characterized in that the electrical contact material free-zone and the vibratable member are dimensioned so that the vibratable member is mountable directly onto the vibratable body on top thereof within the electrical contact material free-zone such that a gap area free of electrode contact material is formed between the terminating edge of the electrical contact material and the periphery of the vibratable member.
