Patent ID: 8765527

Claim:
A method of assembling semiconductor devices each having at least one semiconductor die, internal electrical contacts on an active surface of the semiconductor die, exposed external electrical contacts, and redistribution electrical interconnections between the internal electrical contacts and the external electrical contacts, the method comprising: providing an active die structure including an array of the semiconductor dies; providing a dummy die structure including an array of dummy semiconductor dies; encapsulating the active die structure and the dummy die structure in a layer of molding compound, wherein the internal electrical contacts of the semiconductor dies of the active die structure are positioned at an active face of the layer of molding compound, and the dummy die structure is positioned at a back face of the layer of molding compound and aligned with the active die structure; providing a redistribution layer at the active face of the layer of molding compound, the redistribution layer including a layer of insulating material, and an array of sets of the redistribution electrical interconnections embedded within the insulating material; providing the external electrical contacts connected with the redistribution electrical interconnections and exposed at a surface of the redistribution layer; removing the dummy die structure; and singulating the semiconductor devices.