Patent ID: 8304765

Claim:
A display device comprising: a first substrate having a pixel portion and a common connection portion; a second substrate having a first conductive layer; and a conductive particle interposed between the first substrate and the second substrate, wherein the pixel portion comprises: a gate electrode over the first substrate; a first insulating layer over the gate electrode; a first oxide semiconductor layer over the first insulating layer; a second oxide semiconductor layer and a third oxide semiconductor layer over the first oxide semiconductor layer; a second conductive layer over the first insulating layer and the second oxide semiconductor layer; a third conductive layer over the first insulating layer and the third oxide semiconductor layer; a second insulating layer over the second and third conductive layers and the first oxide semiconductor layer, the second insulating layer having a first contact hole formed over the third conductive layer; and a fourth conductive layer over the second insulating layer and electrically connected to the third conductive layer through the first contact hole, wherein the common connection portion comprises: a third insulating layer over the first substrate; a fifth conductive layer over the third insulating layer; a fourth insulating layer having a second contact hole formed over the fifth conductive layer; and a sixth conductive layer over the fourth insulating layer and electrically connected to the fifth conductive layer through the second contact hole, wherein the sixth conductive layer in the common connection portion is electrically connected to the first conductive layer through the conductive particle, wherein the second conductive layer, the third conductive layer, and the fifth conductive layer are formed of the same material, wherein the fourth conductive layer and the sixth conductive layer are formed of the same material, wherein the first insulating layer and the third insulating layer are formed of the same material, and wherein the second insulating layer and the fourth insulating layer are formed of the same material.