Semiconductor device and method of manufacturing the same, circuit board, and electronic instrument

摘要

A semiconductor device comprising: a semiconductor element having a plurality of electrodes; a passivation film formed on the semiconductor element in a region avoiding at least a part of each of the electrodes; a conductive foil provided at a given spacing from the surface on which the passivation film is formed; an external electrodes formed on the conductive foil; intermediate layer formed between the passivation film and the conductive foil to support the conductive foil; and wires electrically connecting the electrodes to the conductive foil; wherein a depression tapered in a direction from the conductive foil to the passivation film if formed under a part of the conductive foil that includes the connection with the external electrodes.