Patent ID: 6660565
Filing Date: 2003-12-09
Classification: H01L

Abstract:
A method of packaging Integrated Circuit devices, comprising:providing an Integrated Circuit device having first contact balls over a bottom surface in addition to having a top surface; providing a heatsink for said Integrated Circuit device, a first surface of said heatsink being attached by adhesion to a flexible tape; providing a substrate on which to mount said Integrated Circuit device, said substrate having second contact balls over a bottom surface in addition to having a top surface; placing the IC device on top of the heatsink by bringing said top surface of said IC device in contact with a second surface of said heatsink, facing said first contact balls in an upward direction; placing said substrate on top of the first contact balls, facing said second contact balls in an upward direction, thereby; creating an enclosed space surrounding said Integrated Circuit device, two surfaces of said enclosed space comprising said first surface of said heatsink and said top surface of said substrate; providing forward motion to said flexible tape, thereby moving the IC device to a processing station for mold injection, said forward motion being provided by means of rotary motors; and filling the enclosed space around said Integrated Circuit device, including areas underneath the Integrated Circuit device, by injecting a mold compound into said enclosed space, thereby pressing said Integrated Circuit device firmly against a surface of said heatsink, said mold completely filling the enclosed space, thereby encapsulating the IC device including areas between the bottom of the IC device and the top of the substrate, forming an underfill for the IC device.