Liquid crystal display device and electronic device provided with the same
First Claim
Patent Images
1. A display device comprising:
- an electrode over a substrate;
an insulating film over the electrode;
a first semiconductor film over the insulating film, the first semiconductor film overlapping the electrode;
a second semiconductor film over the insulating film, the second semiconductor film overlapping the electrode;
a first conductive film over the first semiconductor film;
a second conductive film over the second semiconductor film; and
a third conductive film over the first semiconductor film and the second semiconductor film, the third conductive film being electrically connected to the first semiconductor film and the second semiconductor film.
0 Assignments
0 Petitions
Accused Products
Abstract
A liquid crystal display device provided with a thin film transistor with excellent electrical characteristics and reduced off current, for which increase in manufacturing costs can be suppressed while suppressing reduction in yield. A thin film transistor includes a gate electrode provided over a substrate; a gate insulating film provided to cover the substrate and the gate electrode; a first island-shaped semiconductor layer and a second island-shaped semiconductor layer each formed as a stack of a microcrystalline semiconductor layer and a buffer layer with a depression on an upper surface thereof, over the gate electrode with the gate insulating film interposed therebetween; a conductive semiconductor layer; and a conductive layer provided on the conductive semiconductor layer. The conductive semiconductor layer is provided between the first island-shaped semiconductor layer and the second island-shaped semiconductor layer in contact with the gate insulating film.
20 Citations
35 Claims
-
1. A display device comprising:
-
an electrode over a substrate; an insulating film over the electrode; a first semiconductor film over the insulating film, the first semiconductor film overlapping the electrode; a second semiconductor film over the insulating film, the second semiconductor film overlapping the electrode; a first conductive film over the first semiconductor film; a second conductive film over the second semiconductor film; and a third conductive film over the first semiconductor film and the second semiconductor film, the third conductive film being electrically connected to the first semiconductor film and the second semiconductor film. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A display device comprising:
-
an electrode over a substrate; an insulating film over the electrode; a first semiconductor film over the insulating film, the first semiconductor film overlapping the electrode; a second semiconductor film over the insulating film, the second semiconductor film overlapping the electrode; a first conductive semiconductor film over the first semiconductor film; a second conductive semiconductor film over the second semiconductor film; a third conductive semiconductor film over the first semiconductor film and the second semiconductor film, the third conductive semiconductor film being in contact with the insulating film between the first semiconductor film and the second semiconductor film; a first conductive film over the first conductive semiconductor film; a second conductive film over the second conductive semiconductor film; and a third conductive film over the third conductive semiconductor film. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
-
-
16. A display device comprising:
-
an electrode over a substrate; an insulating film over the electrode; a first semiconductor film over the insulating film, the first semiconductor film overlapping the electrode; a second semiconductor film over the insulating film, the second semiconductor film overlapping the electrode; a third semiconductor film over the first semiconductor film; a fourth semiconductor film over the second semiconductor film; a fifth semiconductor film over the third semiconductor film; a sixth semiconductor film over the fourth semiconductor film; a seventh semiconductor film over the third semiconductor film and the fourth semiconductor film, the seventh semiconductor film being in contact with the insulating film between the third semiconductor film and the fourth semiconductor film; a first conductive film over the fifth semiconductor film; a second conductive film over the sixth semiconductor film; and a third conductive film over the seventh semiconductor film. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
-
-
26. A display device comprising:
-
an electrode over a substrate; a first insulating film over the electrode; a first semiconductor film over the first insulating film, the first semiconductor film overlapping the electrode; a second semiconductor film over the first insulating film, the second semiconductor film overlapping the electrode; a third semiconductor film over the first semiconductor film; a fourth semiconductor film over the second semiconductor film; a fifth semiconductor film over the third semiconductor film; a sixth semiconductor film over the fourth semiconductor film; a seventh semiconductor film over the third semiconductor film and the fourth semiconductor film, the seventh semiconductor film being in contact with the first insulating film between the third semiconductor film and the fourth semiconductor film; a first conductive film over the fifth semiconductor film; a second conductive film over the sixth semiconductor film; a third conductive film over the seventh semiconductor film; and a second insulating film over the first conductive film, the second conductive film and the third conductive film, the second insulating film being in contact with the third semiconductor film and the fourth semiconductor film. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35)
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeSemiconductor Energy Laboratory Co., Ltd.
-
Original AssigneeSemiconductor Energy Laboratory Co., Ltd.
-
InventorsOkamoto, Satohiro, Miyaguchi, Atsushi
-
Primary Examiner(s)Tran; Tan N
-
Application NumberUS12/608,266Publication NumberTime in Patent Office726 DaysField of Search257/59, 257/72, 257/258, 257/347, 257/E51.005US Class Current257/72CPC Class CodesG02F 1/134318 having a patterned common e...G02F 1/134363 for applying an electric fi...G02F 1/13624 having more than one switch...G02F 1/1368 in which the switching elem...H01L 27/124 with a particular compositi...H01L 29/04 characterised by their crys...H01L 29/41733 for thin film transistors w...H01L 29/66765 Lateral single gate single ...
