Patent ID: 8809853
Filing Date: 2014-08-19
Classification: G11C,H01L

Abstract:
1. A semiconductor device comprising: a substrate containing a semiconductor material; a first transistor formed using the semiconductor material, the first transistor including a channel formation region, a source region, a drain region, a first gate insulating layer, and a first gate electrode; an insulating layer formed over the first transistor; a second transistor formed over the insulating layer, the second transistor including an oxide semiconductor layer, a source electrode, a drain electrode, a second gate insulating layer, and a second gate electrode; a first connection electrode; a second connection electrode; and a third connection electrode formed over the second connection electrode, wherein one of the source electrode and the drain electrode is electrically connected to the first gate electrode with the first connection electrode interposed therebetween, wherein the other of the source electrode and the drain electrode is electrically connected to one of the source region and the drain region with the second connection electrode and the third connection electrode interposed therebetween, and wherein the oxide semiconductor layer overlaps with at least a part of the source region or the drain region.