Display device
First Claim
Patent Images
1. A display device comprising:
- a gate electrode over a light-transmitting substrate, wherein the gate electrode comprises a first conductive material;
a first line over the light-transmitting substrate, wherein the first line comprises the first conductive material and extends in one direction;
a first insulating film having a first opening over the gate electrode and the first line;
a semiconductor film over the first insulating film;
a source electrode over the first insulating film and the semiconductor film, wherein the source electrode comprises a second conductive material;
a drain electrode over the first insulating film and the semiconductor film, wherein the drain electrode comprises the second conductive material;
a conductive film over the first insulating film, the conductive film comprising the second conductive material;
a second line over the first insulating film, the second line comprising the second conductive material and extends in the direction intersecting with the one direction;
a second insulating film over the first insulating film, the source electrode and the drain electrode, the conductive film and the second line;
a third insulating film having a second opening over the second insulating film; and
a pixel electrode over the third insulating film, the pixel electrode being in contact with a portion of the second insulating film in the second opening; and
a capacitor overlapping with the second opening, the capacitor comprising the second line, the second insulating film and the pixel electrode,wherein one of the source electrode and the drain electrode is electrically connected to the semiconductor film and the first line,wherein the other of the source electrode and the drain electrode is electrically connected to the semiconductor film and the pixel electrode,wherein the gate electrode is in contact with the conductive film in the first opening.
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Abstract
In a pixel portion, a scan signal line and an auxiliary capacitor line are formed using a second conductive film, and a data signal line is formed using a first conductive film. In a TFT portion, a gate electrode is formed using the first conductive film and electrically connected to the scan signal line formed using the second conductive film through an opening in a gate insulating film. Further, a source electrode and a drain electrode are formed using the second conductive film. In the auxiliary capacitor portion, the auxiliary capacitor line formed using the second conductive film serves as a lower electrode, the pixel electrode serves as an upper electrode, and the passivation film used as a dielectric film is interposed between the capacitor electrodes.
31 Citations
18 Claims
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1. A display device comprising:
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a gate electrode over a light-transmitting substrate, wherein the gate electrode comprises a first conductive material; a first line over the light-transmitting substrate, wherein the first line comprises the first conductive material and extends in one direction; a first insulating film having a first opening over the gate electrode and the first line; a semiconductor film over the first insulating film; a source electrode over the first insulating film and the semiconductor film, wherein the source electrode comprises a second conductive material; a drain electrode over the first insulating film and the semiconductor film, wherein the drain electrode comprises the second conductive material; a conductive film over the first insulating film, the conductive film comprising the second conductive material; a second line over the first insulating film, the second line comprising the second conductive material and extends in the direction intersecting with the one direction; a second insulating film over the first insulating film, the source electrode and the drain electrode, the conductive film and the second line; a third insulating film having a second opening over the second insulating film; and a pixel electrode over the third insulating film, the pixel electrode being in contact with a portion of the second insulating film in the second opening; and a capacitor overlapping with the second opening, the capacitor comprising the second line, the second insulating film and the pixel electrode, wherein one of the source electrode and the drain electrode is electrically connected to the semiconductor film and the first line, wherein the other of the source electrode and the drain electrode is electrically connected to the semiconductor film and the pixel electrode, wherein the gate electrode is in contact with the conductive film in the first opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A display device comprising:
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a gate electrode over a light-transmitting substrate, wherein the gate electrode comprises a first conductive material; a first line over the light-transmitting substrate, wherein the first line comprises the first conductive material and extends in one direction; a first insulating film having a first opening over the gate electrode and the first line; a microcrystalline semiconductor film over the first insulating film; a buffer layer over the microcrystalline semiconductor film and has a portion that is recessed when seen in cross section; a first impurity semiconductor film and a second impurity semiconductor film, to which an impurity element imparting one conductivity type is added, and which are provided over the buffer layer; a source electrode over the first insulating film, the first impurity semiconductor film and the second impurity semiconductor film, wherein the source electrode comprises a second conductive material; a drain electrode over the first insulating film, the first impurity semiconductor film and the second impurity semiconductor film, wherein the drain electrode comprises the second conductive material; a conductive film over the first insulating film, wherein the conductive film comprises the second conductive material; a second line over the first insulating film, wherein the second line comprises the second conductive material and extends in the direction intersecting with the one direction; a second insulating film over the first insulating film, the source electrode and the drain electrode, the conductive film and the second line; a third insulating film having a second opening over the second insulating film; and a pixel electrode over the third insulating film, the pixel electrode being in contact with a portion of the second insulating film in the second opening; and a capacitor overlapping with the second opening, the capacitor comprising the second line, the second insulating film and the pixel electrode, wherein one of the source electrode and the drain electrode is electrically connected to the first impurity semiconductor film and the first line, wherein the other of the source electrode and the drain electrode is electrically connected to the second impurity semiconductor film and the pixel electrode, and wherein the gate electrode is in contact with the conductive film in the first opening. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification
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Current AssigneeSemiconductor Energy Laboratory Co., Ltd.
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Original AssigneeSemiconductor Energy Laboratory Co., Ltd.
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InventorsHosoya, Kunio
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Primary Examiner(s)YUSHIN, NIKOLAY K
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Application NumberUS13/423,874Publication NumberTime in Patent Office526 DaysField of Search257/59, 257/72, 257/88, 257/E27.001, 349/38, 349/42, 349/43, 349/84, 349/138, 349/139US Class Current257/59CPC Class CodesG02F 1/133345 Insulating layers G02F1/133...G02F 1/136213 Storage capacitors associat...G02F 1/136227 Through-hole connection of ...
