Patent ID: 6933525
Filing Date: 2005-08-23
Classification: G03G,H01L

Abstract:
1. A display device comprising a thin film transistor substrate which includes at least an insulation substrate having a background layer on a surface thereof, a polysilicon layer formed over the background layer, gate electrodes formed over the polysilicon layer by way of a first insulation layer which covers the polysilicon layer, a second insulation layer covering the gate electrode, a pair of source/drain electrodes formed over the second insulation layer, the source/drain electrodes penetrating the second insulation layer and the first insulation layer and being in contact with the polysilicon layer, and a third insulation layer covering the source/drain electrodes, wherein the source/drain electrode includes a cap layer made of molybdenum or a molybdenum alloy which is formed over a conducive layer made of aluminum or an aluminum alloy and is in contact with the third insulation layer, and a barrier layer made of molybdenum or a molybdenum alloy which is formed below the conductive layer and is in contact with the polysilicon layer, and the source/drain electrode further includes a molybdenum oxide nitride film on a surface of the barrier layer which is in contact with the conductive layer.