Patent ID: 7245004
Filing Date: 2007-07-17
Classification: H01L

Abstract:
1. A semiconductor device having a bottom surface and mountable on a wiring board with the bottom surface being opposed to the wiring board, the semiconductor device comprising: a semiconductor chip; a mold resin encapsulating the semiconductor chip; a first heat spreader joined to the semiconductor chip on the bottom surface side with respect to the semiconductor chip, and extending in substantially parallel with the bottom surface with both ends thereof protruding from opposite edges of the mold resin when viewed in a direction perpendicular to the bottom surface, the first heat spreader being capable of being joined to the wiring board by means of the both ends thereof, the bottom surface side of the first head spreader being substantially entirely covered with the mold resin; and a second heat spreader joined to the semiconductor chip on a top surface side opposite to the bottom surface with respect to the semiconductor chip, and extending in substantially parallel with the bottom surface to cross with the first heat spreader along an axis that is non-parallel therewith when viewed in a direction perpendicular to the bottom surface, and with both ends thereof protruding from opposite edges of the mold resin when viewed in a direction perpendicular to the bottom surface, the second heat spreader being capable of being joined to the wiring board by means of the both ends thereof, the top surface side of the second heat spreader being substantially entirely covered with the mold resin, wherein one of the first and second heat spreaders is a lead frame electrically connected to the semiconductor chip.