Patent ID: 8310044
Filing Date: 2012-11-13
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising the steps of: (a) providing a wiring substrate including a first main surface, a first rear surface opposite to the first main surface, a through-hole penetrating the wiring substrate from the first main surface to the first rear surface, a plurality of bonding leads formed over the first rear surface and formed around the through-hole in plan view, and a plurality of bump lands formed over the first rear surface and respectively coupled with the bonding leads; (b) providing a heat-releasing plate including a base material part having a second main surface and a second rear surface opposite to the second main surface, a convex part of the heat-releasing plate being positioned at a central part of the second main surface of the base material part and protruding from the base material part, and a supporting part formed over the second main surface of the base material part; (c) mounting a semiconductor chip, including a third main surface having a plurality of electrode pads, over the convex part of the heat-releasing plate; (d) placing the heat-releasing plate with respect to the first main surface of the wiring substrate such that the second main surface of the base material part faces the first main surface of the wiring substrate, such that the convex part is positioned in the through-hole, and such that the supporting part contacts with the first main surface of the wiring substrate; (e) after the step (d), fixing the heat-releasing plate to the wiring substrate; (f) after the step (e), coupling the electrode pads of the semiconductor chip with the bonding leads of the wiring substrate via respective conductive coupling members; and (g) after the step (f), sealing the semiconductor chip and the conductive coupling members with a resin material, wherein the convex part of the heat-releasing plate provided in the step (b) has a fourth main surface having a groove formed therein and a side surface positioned between the fourth main surface and the second main surface of the base material part, wherein the supporting part has a supporting surface positioned between the fourth main surface of the convex part and the second main surface of the base material, and a side surface positioned between the supporting surface and the second main surface of the base material, wherein, in the step (c), the semiconductor chip is mounted over the fourth main surface of the convex part, wherein, in the step (d), the heat-releasing plate is positioned with respect to the first main surface of the wiring substrate such that the side surface of the convex part positioned in the through-hole faces an inside wall of the through-hole, and wherein, in the step (e), a portion of the side surface of the convex part is brought into contact with the inside wall of the through-hole by forcibly widening the groove in the fourth main surface of the convex part, and the heat-releasing plate is thus fixed to the wiring substrate.