Semiconductor device and method for manufacturing semiconductor device
First Claim
1. A semiconductor device comprising:
- a first conductor;
a first insulator over the first conductor;
a first oxide over the first insulator;
a second oxide over the first oxide;
a second conductor and a third conductor over the second oxide, wherein the second conductor and the third conductor are separate from each other;
a third oxide over the first insulator, the second oxide, the second conductor, and the third conductor;
a second insulator over the third oxide;
a fourth conductor at least part of which overlaps with the second oxide and which is over the second insulator; and
a third insulator over the first insulator, the second insulator, and the fourth conductor,the second oxide comprising;
a region where an energy of a conduction band minimum of an energy band is low; and
a region where an energy of a conduction band minimum of an energy band is high,wherein the region where the energy of the conduction band minimum is low includes more carriers than the region where the energy of the conduction band minimum is high,wherein an energy of a conduction band minimum of the third oxide is higher than the energy of the conduction band minimum of the region of the second oxide where the energy of the conduction band minimum is low, andwherein side surfaces of the first oxide and the second oxide are covered with the third oxide.
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Accused Products
Abstract
A semiconductor device includes a first conductor; a first insulator thereover; a first oxide thereover; a second oxide thereover; a second conductor and a third conductor that are separate from each other thereover; a third oxide over the first insulator, the second oxide, the second conductor, and the third conductor; a second insulator thereover; a fourth conductor thereover; and a third insulator over the first insulator, the second insulator, and the fourth conductor. The second oxide includes a region where the energy of the conduction band minimum of an energy band is low and a region where the energy of the conduction band minimum of the energy band is high. The energy of the conduction band minimum of the third oxide is higher than that of the region of the second oxide where the energy of the conduction band minimum is low. Side surfaces of the first oxide and the second oxide are covered with the third oxide.
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Citations
19 Claims
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1. A semiconductor device comprising:
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a first conductor; a first insulator over the first conductor; a first oxide over the first insulator; a second oxide over the first oxide; a second conductor and a third conductor over the second oxide, wherein the second conductor and the third conductor are separate from each other; a third oxide over the first insulator, the second oxide, the second conductor, and the third conductor; a second insulator over the third oxide; a fourth conductor at least part of which overlaps with the second oxide and which is over the second insulator; and a third insulator over the first insulator, the second insulator, and the fourth conductor, the second oxide comprising; a region where an energy of a conduction band minimum of an energy band is low; and a region where an energy of a conduction band minimum of an energy band is high, wherein the region where the energy of the conduction band minimum is low includes more carriers than the region where the energy of the conduction band minimum is high, wherein an energy of a conduction band minimum of the third oxide is higher than the energy of the conduction band minimum of the region of the second oxide where the energy of the conduction band minimum is low, and wherein side surfaces of the first oxide and the second oxide are covered with the third oxide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A semiconductor device comprising:
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a first conductor; a first insulator over the first conductor; a first oxide over the first insulator; a second oxide over the first oxide; a second conductor and a third conductor over the second oxide, wherein the second conductor and the third conductor are separate from each other; a third oxide over the first insulator, the second oxide, the second conductor, and the third conductor; a second insulator over the third oxide; a fourth conductor at least part of which overlaps with the second oxide and which is over the second insulator; and a third insulator over the first insulator, the second insulator, and the fourth conductor, the second oxide comprising; a first region comprising an element M wherein M is one or more of Al, Ga, Si, B, Y, Ti, Fe, Ni, Ge, Zr, Mo, La, Ce, Nd, Hf, Ta, W, Mg, V, Be, and Cu; and a second region comprising one or both of In and Zn, wherein the first region and the second region are mixed to form a mosaic pattern, wherein the third oxide comprises In, Zn, and the element M, wherein the third oxide has a higher atomic ratio of the element M to In than the second oxide, and wherein side surfaces of the first oxide and the second oxide are covered with the third oxide. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification