Method of producing a contactless chip card or a contact/contactless hybrid chip card with improved flatness

摘要

In a first stage two leaves of homogeneous thermoplastic are welded to either side of a support (30) of an antenna (32,34) and integrated circuit (40). The temperature and pressure applied cause the leaves to flow and eliminate all differences of thickness of the components. After solidification two layers of plastic material (62,64) are applied to the antenna sandwich (50) to form the body of the card