Liquid crystal panel, liquid crystal display device, and manufacturing method thereof
A gate line ( 40 ) has a two-layered structure comprising a lower gate line ( 40 a ) made of material identical to a pixel electrode ( 70 ), and positioned in the same layer as the pixel electrode ( 70 ), and an upper gate line ( 40 b ) layered on the lower gate line ( 40 b ), and made of material having a higher electrical conductivity than the transparent conductive material. According to this structure, it is possible to reduce the number of times performing exposure processes in manufacturing an in-plane switching type liquid crystal panel.
1. A liquid crystal panel comprising:
first and second substrates sandwiching a liquid crystal material,
a thin film transistor formed on the first substrate,
a pixel electrode formed on the first substrate and made of a transparent conductive material,
a common electrode formed on the first substrate and made of a transparent conductive material,
a gate line connected to the thin film transistor and having a layer made of material identical to the pixel electrode and positioned in a same layer as the pixel electrode,
a first insulating layer covering the gate line and the pixel electrode,
a second insulating layer covering the first insulating layer,
a first contact hole penetrating to both the first insulating layer and the second insulating layer, and
a drain line connected to the thin film transistor and formed on the first insulating layer, wherein
the thin transistor film includes a source electrode formed on the first insulating layer,
the common electrode is formed on the second insulating layer,
the pixel electrode is electrically connected to a source electrode of the thin film transistor through the first contact hole via a connecting conductor,
a common line is formed in parallel with the drain line and is electrically connected to the common electrode through a second contact hole formed in the second insulating layer, and
the common line is formed in a same layer as the drain line.
2. The liquid crystal panel according to claim 1 , wherein the gate line has two-layered structure that comprises a lower line made of the same material as the pixel electrode and positioned in a common layer with the pixel electrode, and an upper line layered on the lower line and made of material having a higher electrical conductivity than the transparent conductive material.
3. The liquid crystal panel according to claim 1 , wherein the source electrode overlaps the pixel electrode in a plan view.
4. The liquid crystal panel according to claim 1 , wherein an end part of the source electrode is exposed from the second insulator and is connected to the connecting conductor.
5. The liquid crystal panel according to claim 1 , wherein the connecting conductor is made of the same material as the common electrode and is positioned in a common layer with the common electrode.
6. The liquid crystal panel according to claim 1 , wherein the common line is formed between the first insulating layer and the second insulating layer.
7. A liquid crystal panel comprising:
first and second substrates sandwiching a liquid crystal material,
a thin film transistor formed on the first substrate, a pixel electrode formed on the first substrate and made of a transparent conductive material,
a common electrode formed on the first substrate and made of a transparent conductive material,
a gate line connected to the thin film transistor and having a layer made of material identical to the pixel electrode and positioned in a layer same as the pixel electrode,
a first insulating layer covering the gate line and the pixel electrode, a second insulating layer covering the first insulating layer,
a first contact hole penetrating to both the first insulating layer and the second insulating layer, and
a drain line connected to the thin film transistor and formed on the first insulating layer, wherein
the thin transistor film includes a source electrode formed on the first insulating layer,
the common electrode is formed on the second insulating film,
the pixel electrode is electrically connected to a source electrode of the thin film transistor through the first contact hole via a connecting conductor,
a common line is formed in parallel with the drain line and is electrically connected to the common electrode through a second contact hole formed in the second insulating layer, and
the common line is formed between the first insulating layer and the second insulating film.