SEMICONDUCTOR POWER DEVICE AND METHOD OF MANUFACTURE

摘要

A power semiconductor component having a component of this type is presented which has at least three consecutive layers and possessing a high current capacity and small power losses. For contacting the first two layers, the component has first and second metallized contact planes, which impress a step-like structure onto a first surface of the component. The steps have a height of between 10 and 20 mu m and a width of between 20 and 300 mu m. The ratio between the surface area of the first contact plane and the surface area of the second contact plane is between 1 and 4. The first layer is heavily doped and has a maximum thickness of 8 mu m, and the second layer is lightly doped and has a maximum thickness of 40 mu m. The invention further includes a process for manufacturing the component, wherein the surface structure according to the invention is produced essentially by a reactive ion-etching process with a single aluminum mask.