Patent ID: 8253144
Filing Date: 2012-08-28
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first insulating layer including silicon nitride over a substrate; a first conductive layer including Cu over the first insulating layer; a second conductive layer covering the first conductive layer over the first conductive layer; a second insulating layer including silicon nitride over the second conductive layer; an island-shaped semiconductor layer over the second insulating layer; a pair of third conductive layers serving as a source electrode and a drain electrode over the island-shaped semiconductor layer; a third insulating layer including silicon nitride over the pair of third conductive layers; a fourth conductive layer electrically connected to one of the pair of third conductive layers through an opening provided in the third insulating layer; a fifth conductive layer including Cu, and overlapping the fourth conductive layer; a fourth insulating layer including silicon nitride, and covering the fifth conductive layer; and a sixth conductive layer electrically connected to the other of the pair of third conductive layers through an opening provided in the third insulating layer and the fourth insulating layer, wherein the first conductive layer and the fifth conductive layer do not overlap with the island-shaped semiconductor layer in which a channel of a thin film transistor is formed.