Patent ID: 6936915
Filing Date: 2005-08-30
Classification: H01L

Abstract:
1. A lead frame comprising: a semiconductor chip mounting part made of a thick-walled material; a supporting lead made of a thin-walled material which supports said semiconductor chip mounting part and also serves as an outer lead; and an outer lead arranged in parallel to the supporting lead, wherein a through-hole is made in one side along the one side of the semiconductor chip mounting part so as to have a width equal to or longer than that of a semiconductor chip to be mounted; an opening is formed from a center position of the through-hole toward ends of the one side so as to be wider than a width of the supporting lead; and in the through-hole and the opening between the side ends, a fitting portion having a wider width than the supporting lead, which is formed at the tip of the supporting lead, is fit to sink relative to the surface of the semiconductor chip mounting part so that the semiconductor chip mounting part and the supporting lead is coupled and the through-hole forms a groove from the plane on which the semiconductor chip is mounted.