Patent ID: 8648250
Filing Date: 2014-02-11
Classification: H01L,Y02E

Abstract:
1. A multi-stack semiconductor device with an increased effective operation area, the semiconductor device comprising: a substrate; a first conductive layer formed on the substrate, the first conductive layer having laser-processed scribing to form a plurality of first scribe lines whereby part of the first conductive layer is removed to expose the substrate, each first scribe line being comprised of a plurality of the first pores, and each first pore partially overlapping with the neighboring first pore; a first group of the semiconductor material layers and a second group of the semiconductor material layers, the first group of the semiconductor material layers being comprised of a plurality of the semiconductor material layers and formed on the first conductive layer, the second group of the semiconductor material layers being comprised of a plurality of the semiconductor material layers and formed on the first group of the semiconductor material layers, the first group of the semiconductor material layers and the second group of the semiconductor material layers having laser-processed scribing to form a plurality of second scribe lines whereby part of the first group of the semiconductor material layers and part of the second group of the semiconductor material layers are removed to expose the first conductive layer, and each second scribe line being comprised of a plurality of the second pores; a second conductive layer formed on the second group of the semiconductor material layers, the second conductive layer having laser-processed scribing to form a plurality of third scribe lines whereby part of the first group of the semiconductor material layers, part of the second group of the semiconductor material layers and part of the second conductive layer are removed to expose the first conductive layer, each third scribe line being comprised of a plurality of the third pores, and each third pore partially overlapping with the neighboring third pore; wherein the second pores are shortened for shortening horizontal distance between the first scribe lines and the second scribe lines and/or the horizontal distance between the second scribe lines and the third scribe lines whereby the semiconductor device effective operation area is increased, and wherein each second pore is distant from the neighboring second pore.