A method for making a microelectronic unit includes forming a plurality of wire bonds on a first surface in the form of a conductive bonding surface of a structure comprising a patternable metallic element. The wire bonds are formed having bases joined to the first surface and end surfaces remote from the first surface. The wire bonds have edge surfaces extending between the bases and the end surfaces. The method also includes forming a dielectric encapsulation layer over a portion of the first surface of the conductive layer and over portions of the wire bonds such that unencapsulated portions of the wire bonds are defined by end surfaces or portions of the edge surfaces that are unconvered by the encapsulation layer. The metallic element is patterned to form first conductive elements beneath the wire bonds and insulated from one another by portions of the encapsulation layer.