Thin USB electronic device

A thin USB electronic device, which includes a substrate and a housing enclosing the substrate, is disclosed. The substrate includes a circuit board and an extended connector. Electrically conductive metal strips are adhered to the connector, and integrated circuit elements are mounted on the substrate. The housing has openings, through which the corresponding metal strips are exposed and electrically communicate with the contacts of an USB receptacle. In another example USB electronic device, a plurality of metal film are used instead of electrically conductive strips, the integrated circuits are allocated centrally beneath the substrate, and bulges are manufactured upon the lower housing to sustain the extended connector.