Liquid crystal panel, liquid crystal display device, and manufacturing method thereof

摘要

A gate line (40) has a two-layered structure comprising a lower gate line (40a) 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 (40b) layered on the lower gate line (40b), 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.

主权项

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.