Patent ID: 6316717
Filing Date: 2001-11-13
Classification: H01L

Abstract:
A heat sink for an encapsulated thermally balanced chip package, comprising:a die attach structure having an attachment side for receiving a die in contact with a packaging material and an opposite packaging side for contacting a packaging material;an outer structure surrounding said die attach structure, said outer structure having a top side for contacting a packaging material and an opposite bottom side for exposing a surface and emitting heat into the environment outside the chip package;at least one downset connecting said die attach structure and said outer structure, wherein:said at least one downset has two opposing sides for contacting a packaging material;said die attach structure, said outer structure, and said at least one downset are a single piece of material;said outer structure is offset with respect to said die attach structure by an offset distance; andsaid downset, said die attach structure and said offset distance define a region for receiving packaging material to encapsulate said at least one downset, said die attach structure, and at least said top side of said outer structure, such that the chip package is thermally balanced; andat least one opening between said die attach structure and said outer structure.