Patent ID: 8604615
Filing Date: 2013-12-10
Classification: H01L

Abstract:
1. A stack of semiconductor chips comprising: a first chip of the stack; a second chip of the stack over the first chip; conductive bumps extending between an upper surface of the first chip and a lower surface of the second chip; a homogeneous integral underfill material interposed between the first chip and the second chip, encapsulating the conductive bumps, and extending along sidewalls of the second chip, the homogeneous integral underfill material having an upper surface extending away from the sidewalls of the second chip, the upper surface of the homogeneous integral underfill material having a height with respect to the upper surface of the first chip corresponding to a height of an upper surface of the second chip with respect to the upper surface of the first chip, the homogeneous integral underfill material not covering the upper surface of the second chip; and a molding material on outer side surfaces of the homogeneous integral underfill material above the upper surface of the first chip, wherein, in view of a first cross sectional profile, the molding material is separated from sidewalls of the second chip by the homogeneous integral underfill material such that the molding material does not contact sidewalls of the second chip.