Patent ID: 8269329
Filing Date: 2012-09-18
Classification: H01L

Abstract:
1. A multi-chip package module, comprising: a substrate; a first chip positioned over the substrate and having an active surface; a second chip connected to the active surface of the first chip and positioned between the substrate and the first chip, wherein a height of the second chip in a direction perpendicular to the active surface is defined as h a plurality of first bumps positioned between the active surface of the first chip and the second chip, wherein a height of the first bumps in the direction perpendicular to the active surface is defined as h a plurality of contacts protruding from the active surface of the first chip, wherein each of the contact comprises a plurality of stacked second bumps, the contacts do not overlap the second chip in their orthographic projections on the substrate, a height of the contacts in the direction perpendicular to the active surface is defined as h an underfill film made from an insulating material and formed over the active surface of the first chip, wherein the underfill film covers the stacked second bumps of the contacts and exposes the top surface of the contacts, and a second empty space is defined by the second chip and the underfill film to isolate the second chip from the underfill film.