| US 7,508,055 B2 | ||
| High heat release semiconductor and method for manufacturing the same | ||
| Yutaka Katou, Osaka (Japan); Akira Oga, Shiga (Japan); Shuichi Ogata, Osaka (Japan); and Hideki Sakoda, Kyoto (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan) | ||
| Filed on Jan. 14, 2005, as Appl. No. 11/34,935. | ||
| Claims priority of application No. 2004-144149 (JP), filed on May 13, 2004. | ||
| Prior Publication US 2005/0253280 A1, Nov. 17, 2005 | ||
| Int. Cl. H01L 23/495 (2006.01) | ||
| U.S. Cl. 257—676 [257/692] | 23 Claims |
| 1. A semiconductor device comprising a die pad of a conductive material, a quadrilateral semiconductor element mounted on
the die pad, a plurality of suspension members of the conductive material formed continuously with the die pad and extending
outward from the die pad, a plurality of leads of the conductive material provided between adjacent two of the suspension
members and each having one end opposed to a corresponding edge of the semiconductor element, a plurality of thin conductive
wires through which the corresponding leads are connected to the semiconductor element; and an encapsulant for encapsulating
the die pad, the semiconductor element, the suspension members, parts of the leads and the thin conductive wires, the other
end of said each lead opposite to said one end thereof protruding from the encapsulant to the outside,
wherein the semiconductor device further comprises a grounding lead formed of the conductive material, branching from at least
one of the suspension members and aligned, in part, generally parallel with the leads,
a grounding lead parallel part of the grounding lead aligned generally parallel with the leads is located between one and
another of the leads without any of the suspension member therebetween and is formed in the same plane as the leads,
the suspension members comprise flat parts extending in a generally parallel direction with the die pad and formed above the
die pad and slope parts connecting the flat parts with the die pad,
one of the slope parts is located between a portion of the grounding lead, wherein the said portion is branched from the suspension
member but excludes the grounding lead parallel part and the die pad, and
one of the leads adjacent to one of the suspension members is shorter than all the other leads.
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