apparatuses and methods for forming microelectronic assemblies are claimed . one embodiment of the invention includes a contact smart card wherein fluidic self assembly is used to build the microelectronic structures on the microelectronic assembly such that a contact smart data is transmitted unidirectionally . a contact smart card is inserted directly into a device that transfers data to a microelectronic assembly coupled to the smart card . another embodiment of the invention relates to a contactless smart card in which fluidic self assembly is also used here to build the microelectronic assembly . data is transmitted to an antenna that is embedded in the contactless card in which a plurality of blocks were deposited thereon .