| 摘要 |
PURPOSE:To reduce the cost of a semiconductor device and to avoid a crack of a resin by forming a structure that aluminum is used for a heat sink and a copper layer is formed at the side of mounting an element when the heat sink is bonded on one surface of a heat sink plate, a semiconductor element is mounted here and the element and the sink are molded with resin. CONSTITUTION:When a heat sink 11 is bonded to one flat surface of a heat sink plate 10, a sink substrate 11a is formed of an aluminum, an Al2O3 layer 11c is provided at the plate 10 side, and a Cu layer 11b is provided at the side of securing a power IC element 2. Then, a solder layer 6 is used at the side of the layer 11b, an IC element is secured, and wiring electrodes provided at the element are connected via fine metal wirings 3 with a lead 4a having a solder coating layer 12 at the projection. Thereafter, the element 2, the inner end side of the lead 4a and the sink 11 are surrounded by an enclosure 5 made of molding resin. Thus, the cost of a semiconductor device is reduced, and the weight of the device is decreased. |
