Patent ID: 7338838
Filing Date: 2008-03-04
Classification: H01L

Abstract:
1. A method for fabricating a resin-encapsulation semiconductor device comprising the steps of: preparing a lead frame including a die pad provided inside an outer frame made from a plate material for mounting a semiconductor element, supporting leads supporting the die pad at tips thereof and connected to the outer frame at bases thereof, and a plurality of leads arranged to have tips thereof opposing the die pad, connected to the outer frame at bases thereof and having, at the tips thereof, thin portions having a reduced thickness in upper faces thereof; mounting, on the die pad of the prepared lead frame, a semiconductor element having a principal plane where electrodes are disposed, with the principal plane thereof facing upward; connecting, through metal wires, the electrodes of the semiconductor element mounted on the die pad to upper faces of the leads of the lead frame in positions other than upper faces of the thin portions; and resin encapsulating an upper face of the lead frame with an encapsulation resin for encapsulating the die pad excluding a bottom thereof, the leads excluding bottoms thereof, connecting regions with the metal wires, the supporting leads and the semiconductor elements, wherein each of the tips of the leads opposing the die pad has a thin portion where a thickness is reduced in an upper face thereof, and entire lower faces of the leads are planar.