Patent ID: 7964942
Filing Date: 2011-06-21
Classification: H01L

Abstract:
1. A semiconductor device comprising: a rectangular shaped semiconductor chip; a lead frame having a die stage with a top surface on which the semiconductor chip is mounted, the die stage having bottom surface, wherein an outline of the die stage is shaped so as to be smaller than an outline of the semiconductor chip, wherein the die stage has a rectangular shape with peripheral edges; a plurality of cutouts formed on the peripheral edges of the die stage from the top surface to the bottom surface, such that the plurality of cutouts are formed inwardly with respect to the peripheral edges on four sides of the die stage; at least one secondary cutout provided in the bottom surface of the die stage, the at least one secondary cutout being contiguous with and conforming to a shape of at least one of the plurality cutouts, the at least one secondary cutout not penetrating an entire thickness of the die stage wherein the at least one secondary cutout is formed toward a center of the die stage in relation to the at least one of the plurality of cutouts; and a molded resin for integrally enclosing the die stage, including the entire bottom surface, and the semiconductor chip, wherein the molded resin is introduced into at least one of the cutouts or the at least one secondary cutout of the die stage.