US 2019/0172851 A1Published application

Liquid crystal display panel and method of manufacturing the same

AssigneeMitsubishi Electric Corporation

InventorKazushi YAMAYOSHI

Life of this patent

Estimating the term…

Loading patent…

Abstract

A liquid crystal display panel includes a semiconductor film, source and drain electrodes, a planarizing insulating film, first and second transparent conductive films, an insulating film, a pixel electrode, and a counter electrode. The semiconductor film overlaps a gate electrode on a substrate across a gate insulating film. The source and drain electrodes are separately provided on the semiconductor film. The planarizing insulating film includes an opening for partially exposing the source and drain electrodes on its bottom. The first and second transparent conductive films respectively come in contact with surfaces of the source and drain electrodes. The insulating film is provided on the planarizing insulating film so as to cover the opening and the first and second transparent conductive films. The pixel electrode is provided on the insulating film and is electrically connected to the drain electrode via the second transparent conductive film. The counter electrode is opposed to the pixel electrode.

Claims20

Dependent claims

A liquid crystal display panel, comprising

a thin film transistor substrate in which a plurality of pixels are arranged in a matrix pattern, wherein
each of the plurality of pixels comprises:
a gate electrode selectively disposed on a substrate;
a gate insulating film covering the gate electrode;
a semiconductor film disposed on the gate insulating film so as to overlap the gate electrode;
a source electrode and a drain electrode provided on the semiconductor film so as to be separated apart from each other;
a planarizing insulating film covering the gate insulating film, the planarizing insulating film comprising an opening for partially exposing the source electrode and the drain electrode on a bottom of the opening;
a first transparent conductive film and a second transparent conductive film provided to extend from an upper surface of the planarizing insulating film toward a side surface of the opening and the bottom of the opening so as to respectively come in contact with a surface of the source electrode and a surface of the drain electrode that are exposed on the bottom of the opening;
an insulating film provided on the planarizing insulating film so as to cover the opening, the first transparent conductive film, and the second transparent conductive film;
a pixel electrode electrically connected to the drain electrode via the second transparent conductive film;
and
a counter electrode provided to be opposed to the pixel electrode across the insulating film, and
the pixel electrode is provided on the insulating film and is electrically connected to the drain electrode through a contact hole, the contact hole being provided in the insulating film to penetrate the insulating film at a position corresponding to a position above the second transparent conductive film and above the upper surface of the planarizing insulating film.

10 more elements

A liquid crystal display panel, comprising

a thin film transistor substrate in which a plurality of pixels are arranged in a matrix pattern, wherein
each of the plurality of pixels comprises:
a gate electrode selectively disposed on a substrate;
a gate insulating film covering the gate electrode;
a semiconductor film disposed on the gate insulating film so as to overlap the gate electrode;
a source electrode and a drain electrode provided on the semiconductor film so as to be separated apart from each other;
a planarizing insulating film covering the gate insulating film, the planarizing insulating film comprising an opening for partially exposing the source electrode and the drain electrode on a bottom of the opening;
a first transparent conductive film and a second transparent conductive film provided to extend from an upper surface of the planarizing insulating film toward a side surface of the opening and the bottom of the opening so as to respectively come in contact with a surface of the source electrode and a surface of the drain electrode that are exposed on the bottom of the opening;
an insulating film provided on the planarizing insulating film so as to cover the opening, the first transparent conductive film, and the second transparent conductive film;
a pixel electrode integrally provided with the second transparent conductive film and electrically connected to the drain electrode;
and
a counter electrode provided on the insulating film so as to be opposed to the pixel electrode across the insulating film.

9 more elements

A liquid crystal display panel, comprising

a thin film transistor substrate in which a plurality of pixels are arranged in a matrix pattern, wherein
each of the plurality of pixels comprises:
a gate electrode selectively disposed on a substrate;
a gate insulating film that covers the gate electrode;
a source electrode and a drain electrode provided on the gate insulating film so as to overlap the gate electrode, the source electrode and the drain electrode being separated apart from each other;
a planarizing insulating film covering the gate insulating film, the planarizing insulating film comprising an opening for partially exposing the source electrode and the drain electrode on a bottom of the opening;
an oxide semiconductor film provided to extend from an upper surface of the planarizing insulating film toward a side surface of the opening and the bottom of the opening up to a top of the source electrode and a top of the drain electrode that are exposed on the bottom of the opening, the oxide semiconductor film further extending between the source electrode and the drain electrode;
an insulating film provided on the planarizing insulating film so as to cover the opening and the semiconductor film;
a pixel electrode integrally provided with the oxide semiconductor film and electrically connected to the drain electrode;
and
a counter electrode provided on the insulating film so as to be opposed to the pixel electrode across the insulating film, and
the pixel electrode is formed of a transparent conductive film that has a composition the same as a composition of the oxide semiconductor film.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/180,153Filed 5 Nov 2018
Priority: JP 2017-2322924 Dec 2017
Published: 6 Jun 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

H10D 86/60
Characterised by multiple TFTs: wherein the TFTs are in active matrices
G02F 1/133345
Constructional arrangements; Manufacturing methods: insulating layers
G02F 1/134363
Characterised by their geometrical arrangement: for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
G02F 1/136227
Active matrix addressed cells: through-hole connection of the pixel electrode to the active element through an insulation layer

Family

US 10,797,086 B2Related patent
US 2019/0172851 A1This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key