Provided is a solder with high tensile strength and pull cut resistance. The stent has an expandable, linked-filament body and a drug-release coating formed on the stent-body filaments, for contacting the vessel injury site when the stent is placed in-situ in an expanded condition. A communication protocol common to the networks may be used. Each of the capacitor arrays has capacitor cells, and each of the capacitor cells has capacitor structures and a buried implant.