SEMICONDUCTOR UNIT WITH SUBMOUNT FOR SEMICONDUCTOR DEVICE

摘要

A semiconductor unit includes a submount and a chip coupled to the submount. The submount is configured with a base and a plurality of layers between the base and the chip. One of the layers, a heat-spreading electro-conducting sliver (“Ag”) layer, is deposited atop the base. The thickness of the Ag layer is selected so that a cumulative coefficient of thermal expansion of the submount substantially matches that one of the chip. Coupled to the active zone of the chip is a stress-dumping layer made from elastic malleable materials.