Patent ID: 8637989
Filing Date: 2014-01-28
Classification: H01L

Abstract:
1. A stack module, comprising: a module substrate; a first semiconductor chip and a second semiconductor chip sequentially stacked on the module substrate; and a first conductive bump disposed between the first semiconductor chip and the second semiconductor chip, wherein each of the first and second semiconductor chips comprises: a semiconductor substrate; a conductive pad disposed on the semiconductor substrate; a via electrode connected to the conductive pad, wherein the via electrode comprises: a body portion that extends into the semiconductor substrate, and a plurality of spikes located under the body portion that extend from the body portion into the semiconductor substrate, wherein the spikes are spaced apart from one another and wherein the spikes have a tapered structure such that the spikes become narrower in diameter as they extend further away from the conductive pad; a spacer insulation layer formed on the body portion and on the spikes of the via electrode, wherein the spikes of the via electrode of one of the first semiconductor chip or the second semiconductor chip penetrate into the first conductive bump disposed between the first semiconductor chip and the second semiconductor chip.