A vertical interconnect (15) in an electronic device (10) is manufactured non-photolithographically. This is done by modifying a surface (20,30) of either a metal layer (3) or an intermediate layer of an electrically insulating material (21), and subsequently depositing a composition with a first and a second polymer. Phase separation of the two polymers will lead to a first (6) and a second sub-layer (7), of which the first sub-layer (6) is removed. An upper layer (9) of electrically conducting material can be deposited then or after a further etching step. This results in the vertical interconnect (15).