Patent ID: 6943064

Claim:
A method of manufacturing a semiconductor device comprising the steps of: providing a leadframe having a major and back surfaces opposite each other, a frame section, a tub arranged in the frame section, suspension leads suspending the tub from the frame section and leads arranged in the frame section and respectively connecting the frame section; providing a semiconductor chip having a major surface on which semiconductor elements and bonding pads are formed and a back surface opposite to the major surface thereof; bonding the back surface of the semiconductor chip on a major surface of the tub; electrically connecting the bonding pads with major surfaces of leads via wires; forming resin body sealing the semiconductor chip, the wires, and a back surface of the tub therein, wherein back surfaces of the leads are exposed from the resin body; wherein the tub is thinner than the leads; wherein the major surface of the tub is arranged higher than the major surfaces of the leads in the resin body; and wherein the tub is thinned by etching the back surface thereof.