Semiconductor device and manufacturing method thereof
First Claim
1. A semiconductor device comprising:
- a first wiring having a projection over an insulating surface, comprising;
a first conductive layer;
a second conductive layer formed over the first conductive layer and in the projection; and
a third conductive layer formed over the first conductive layer and the second conductive layer;
an insulating layer over the first wiring; and
a second wiring over the insulating layer, wherein the first wiring is electrically connected to the second wiring at the projection through a hole in the insulating layer.
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Accused Products
Abstract
A technology for easily forming a multi-layer wiring structure that is fine and reliable. In the multi-layer wiring structure, the lower-layer wiring and the upper-layer wiring that are formed to sandwich an insulating layer are electrically connected to each other in a projection formed in the lower-layer wiring. The projection includes a columnar conductive member and the upper and lower layers thereof and each of the lower layer and the upper layer is formed of a conductive layer formed over the entire lower-layer wiring. The upper-layer is electrically connected to the lower-layer wiring in the portion where the projection is exposed substantially on the same plane as the top surface of the insulating layer.
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Citations
43 Claims
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1. A semiconductor device comprising:
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a first wiring having a projection over an insulating surface, comprising;
a first conductive layer;
a second conductive layer formed over the first conductive layer and in the projection; and
a third conductive layer formed over the first conductive layer and the second conductive layer;
an insulating layer over the first wiring; and
a second wiring over the insulating layer, wherein the first wiring is electrically connected to the second wiring at the projection through a hole in the insulating layer. - View Dependent Claims (6, 11, 16, 21, 35)
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2. A semiconductor device comprising:
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a first insulating layer having a contact hole;
a first wiring having a projection over the first insulating layer, comprising;
a first conductive layer;
a second conductive layer formed over the first conductive layer and in the projection; and
a third conductive layer formed over the first conductive layer and the second conductive layer;
a second insulating layer over the first wiring; and
a second wiring over the second insulating layer, wherein the first wiring is electrically connected to the second wiring at the projection through a hole in the second insulating film, and wherein the contact hole is filled with a material that is identical to a material contained in the second conductive layer. - View Dependent Claims (7, 12, 17, 22, 36)
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3. A semiconductor device comprising:
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a first insulating layer having a contact hole;
a first conductive layer formed over a top surface of the first insulating layer and in the contact hole;
a second conductive layer filling the contact hole;
a third conductive layer over a portion of the first conductive layer;
a fourth conductive layer over the first, the second and the third conductive layers;
a second insulating layer over the fourth conductive layer; and
a fifth conductive layer over the second insulating layer, wherein a projection is formed by the first, the third and the fourth conductive layers in a portion where the first, the third and the fourth conductive layers are overlapped, and wherein the fourth conductive layer is electrically connected to the fifth conductive layer through a hole in the second insulating layer. - View Dependent Claims (8, 13, 18, 37)
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4. A semiconductor device comprising:
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a thin film transistor comprising;
a semiconductor layer;
a gate insulating film; and
a gate electrode;
a first insulating layer having a contact hole over the thin film transistor;
a first conductive layer formed over a top surface of the first insulating layer and in the contact hole;
a second conductive layer filling the contact hole;
a third conductive layer over a portion of the first conductive layer;
a fourth conductive layer over the first, the second and the third conductive layers;
a second insulating layer over the fourth conductive layer; and
a fifth conductive layer over the second insulating layer, wherein a projection is formed by the first, the third and the fourth conductive layers in a portion where the first, the third and the fourth conductive layers are overlapped, and wherein the fourth conductive layer is electrically connected to the fifth conductive layer through a hole in the second insulating layer. - View Dependent Claims (9, 14, 19, 24, 27, 38)
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5. A semiconductor device comprising:
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a thin film transistor comprising;
a semiconductor layer;
a gate insulating film; and
a gate electrode;
a first insulating layer having a contact hole over the thin film transistor;
a first conductive layer formed over a top surface of the first insulating layer and in the contact hole;
a second conductive layer filling the contact hole;
a third conductive layer over a portion of the first conductive layer;
a fourth conductive layer over the first, the second and the third conductive layers;
a second insulating layer over the fourth conductive layer; and
a fifth conductive layer over the second insulating layer;
a light emitting layer over the fifth conductive layer; and
a sixth conductive layer over the light emitting layer, wherein the first conductive layer is electrically connected to the semiconductor layer, wherein a projection is formed by the first, the third and the fourth conductive layers in a portion where the first, the third and the fourth conductive layers are overlapped, and wherein the fourth conductive layer is electrically connected to the fifth conductive layer through a hole in the second insulating layer. - View Dependent Claims (10, 15, 20, 25, 28, 31, 34, 39)
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23. (canceled)
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26. (canceled)
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29-30. -30. (canceled)
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32-33. -33. (canceled)
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40. A manufacturing method of a semiconductor device, comprising the steps of:
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forming a first conductive film over an insulating surface;
forming a first mask over the first conductive film;
performing a first etching to the first conductive film using the first mask;
stopping the first etching in a condition where at least a part of the first conductive film remains over the insulating surface;
forming a second conductive film over the remaining first conductive film and the insulating surface;
forming a hard mask layer over the second conductive film;
forming a second mask over the second conductive film;
performing a second etching to the second conductive film;
stopping the second etching in a condition where at least a part of the second conductive film remains over the insulating surface;
removing the second mask; and
removing at least the second conductive film that remains over the insulating surface and that is not covered by the hard mask layer. - View Dependent Claims (42)
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41. A manufacturing method of a semiconductor device, comprising the steps of:
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forming a first insulating film over an insulating surface;
forming a contact hole in the first insulating film;
forming a first conductive film comprising a first conductive material over the first insulating film and in the contact hole;
performing a heat treatment so that the contact hole in the first insulating film is filled with the first conductive material;
forming a first mask over the first conductive film;
performing a first etching to the first conductive film;
stopping the first etching in a condition where at least a part of the first conductive film remains over the first insulating film and the first conductive material fills the contact hole, forming a second conductive film over the remaining first conductive film and the first insulating film;
forming a hard mask layer over the second conductive film;
forming a second mask over the second conductive film;
performing a second etching to the second conductive film;
stopping the second etching in the condition where at least a part of the second conductive film remains over the first insulating film;
removing the second mask; and
removing at least the second conductive film that remains over the first insulating film and that is not covered with the hard mask layer. - View Dependent Claims (43)
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Specification