Patent ID: 8816349
Filing Date: 2014-08-26
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first insulating layer comprising silicon nitride over a substrate; a first conductive layer comprising copper over the first insulating layer; a second conductive layer covering the first conductive layer; a second insulating layer comprising silicon nitride over the second conductive layer; a third insulating layer comprising silicon oxide over the second insulating layer; an oxide semiconductor layer over the third insulating layer; a third conductive layer over the oxide semiconductor layer and a fourth conductive layer over the oxide semiconductor layer; a fourth insulating layer comprising silicon oxide over the oxide semiconductor layer; a fifth insulating layer comprising silicon nitride over the fourth insulating layer; a fifth conductive layer over the fifth insulating layer, the fifth conductive layer electrically connected to one of the third conductive layer and the fourth conductive layer; a sixth conductive layer comprising copper over the fifth conductive layer; a sixth insulating layer comprising silicon nitride covering the sixth conductive layer; and a seventh conductive layer over the sixth insulating layer, the seventh conductive layer electrically connected to the other of the third conductive layer and the fourth conductive layer, wherein the first conductive layer and the sixth conductive layer do not overlap with the oxide semiconductor layer, and wherein the third conductive layer and the fourth conductive layer each comprise same material.