Patent ID: 8030138

Claim:
A method of packaging integrated circuits comprising: providing a substrate formed from a sacrificial semiconductor wafer, the substrate having a first surface including a plurality of device areas, wherein each device area includes a die attach area and an array of non-solder metallized electrically isolated contacts that are not electrically connected to any circuits within the wafer; attaching a plurality of dice to the substrate, wherein each die is mounted on an associated device area; electrically connecting the dice to selected contacts on their associated device areas; encapsulating the first surface of the substrate, the dice, the contacts and the electrical connections; and sacrificing the semiconductor material of the sacrificial semiconductor wafer after the encapsulation leaving at least portions of the contacts exposed to serve as electrical contacts for their associated dice, wherein the encapsulation material holds the plurality of device areas together after the semiconductor material of the sacrificial semiconductor wafer has been sacrificed, wherein the sacrificing of the sacrificial semiconductor wafer is performed by backgrinding the sacrificial semiconductor wafer until the sacrificial semiconductor wafer is completely removed and at least a portion of the contacts are exposed.