An assembly (60) includes a substrate (1) that is provided with at least one electrical contact (3a), a flexible printed circuit membrane (51) including an electrically insulating film (6) and an electrically conducting layer (7) that is at least partially covering the insulating film (6). The conducting layer (7) is at least locally accessible from outside of the membrane (51). A connection element (10) is provided for electrically connecting the at least one electrical contact (3a) and the conducting layer (7) at a position where the conducting layer (7) is accessible, to form an electrical connection between the substrate (1) and the membrane (51). A chip package (70) includes a housing (15) having at least one electrically conducting terminal, and an assembly (60) as mentioned. The flexible printed circuit membrane (51) is arranged for electrically connecting the substrate and the at least one terminal of the housing (15).