Patent ID: 8975117
Filing Date: 2015-03-10
Classification: H01L

Abstract:
1. A method comprising: providing a semiconductor chip having a first main surface and a second main surface, wherein the second main surface comprises an electrode; placing the semiconductor chip on a carrier with the first main surface of the semiconductor chip facing the carrier, wherein a first layer of solder material is provided between the first main surface and the carrier; placing a contact clip comprising a first contact area on the semiconductor chip with the first contact area facing the second main surface of the semiconductor chip, wherein a second layer of solder material is provided between the first contact area and the electrode; and thereafter applying heat to the first and second layers of solder material to form a first diffusion solder bond layer from the first layer of solder material and a second diffusion solder bond layer from the second layer of solder material, wherein applying heat comprises placing the carrier, the semiconductor chip and the contact clip in a furnace, wherein a maximum temperature applied by the furnace to the first and second layers of solder material is between 250° C. and 350° C., and wherein no external pressure is applied to the carrier, the semiconductor chip and the contact clip while in the furnace.