US Patent 12136008 Biometric smart card having an apertured metal layer

A biometric smart card includes a first polymer layer, an electrical substrate layer having at least one interconnect layer over the first polymer layer, an antenna proximate to the electrical substrate layer, a metal layer proximate to the antenna and the electrical substrate layer, the metal layer comprising a plurality of circumferential apertures, and a second polymer layer over the metal layer, wherein the plurality of apertures in the metal layer allow the smart card to flex in one, two or three dimensions.