Memory device utilizing giant magnetoresistance effect
First Claim
1. A memory device utilizing giant magnetoresistance effect and comprising:
- a substrate with an insulating surface;
a monocrystalline semiconductor layer formed on the insulating surface of said substrate;
a switching element formed at least on part of said monocrystalline semiconductor layer;
a magnetoresistive film formed on the insulating surface of said substrate, said magnetoresistive film consisting of a first magnetic layer and a second magnetic layer which has a higher coercive force than the first magnetic layer and which is stacked on the first magnetic layer with a non-magnetic layer interposed between them; and
a word line installed near said magnetoresistive film with an insulating layer interposed between them, wherein said switching element is connected electrically to either the magnetoresistive film or word line.
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Accused Products
Abstract
A memory device using giant magnetoresistance (GMR) effect, and an inexpensive memory device that has low power consumption, excels in memory performance, and is suitable for use in computer peripherals.
The memory device utilizes giant magnetoresistance effect and includes a substrate with an insulating surface; a monocrystalline semiconductor layer formed on the insulating surface of the substrate, a switching element formed at least on part of the monocrystalline semiconductor layer, a magnetoresistive film formed on the insulating surface of the substrate, the magnetoresistive film comprising a first magnetic layer and a second magnetic layer which has a higher coercive force than the first magnetic layer and which is stacked on the first magnetic layer with a non-magnetic layer interposed between them, and a word line installed near the magnetoresistive film with an insulating layer interposed between them, and the switching element is connected electrically to either the magnetoresistive film or word line.
235 Citations
32 Claims
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1. A memory device utilizing giant magnetoresistance effect and comprising:
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a substrate with an insulating surface; a monocrystalline semiconductor layer formed on the insulating surface of said substrate; a switching element formed at least on part of said monocrystalline semiconductor layer; a magnetoresistive film formed on the insulating surface of said substrate, said magnetoresistive film consisting of a first magnetic layer and a second magnetic layer which has a higher coercive force than the first magnetic layer and which is stacked on the first magnetic layer with a non-magnetic layer interposed between them; and a word line installed near said magnetoresistive film with an insulating layer interposed between them, wherein said switching element is connected electrically to either the magnetoresistive film or word line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A memory device utilizing giant magnetoresistance effect and comprising:
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a substrate with an insulating surface; a monocrystalline semiconductor layer formed on the insulating surface of said substrate; N magnetoresistive films (N is an integer equal to or larger than
2) installed on said insulating surface, and extending linearly in a first direction and arranged in parallel to one another in a second direction orthogonal to the first direction, said magnetoresistive films consisting of a first magnetic layer and a second magnetic layer which has a higher coercive force than the first magnetic layer and which is stacked on the first magnetic layer with a non-magnetic layer interposed between them;M word lines (M is an integer equal to or larger than
2) installed near said magnetoresistive films, separated by an insulating layer, and extending linearly in the second direction and arranged in parallel to one another in the first direction;
N first switching elements formed at least on part of said monocrystalline semiconductor layer and electrically connected, respectively, to said N magnetoresistive films; andM second switching elements formed at least on part of said monocrystalline semiconductor layer and electrically connected, respectively, to said M word lines. - View Dependent Claims (18, 19, 20, 21, 22, 29, 30, 31, 32)
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17. A memory device utilizing giant magnetoresistance effect and comprising:
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a substrate with an insulating surface; a monocrystalline semiconductor layer formed on the insulating surface of said substrate; memory cells consisting of magnetoresistive films arranged in an M×
N matrix installed on the insulating surface of said substrate (M and N are integers equal to or larger than
2), each of said memory cells consisting of a first magnetic layer and a second magnetic layer which has a higher coercive force than the first magnetic layer and which is stacked on the first magnetic layer with a non-magnetic layer interposed between them;N sense lines extending linearly in a first direction and arranged in parallel to one another in a second direction orthogonal to the first direction, and electrically connected, respectively, to M memory cells arranged in parallel to one another in the first direction; M word lines installed near each of said memory cells, separated by an insulating layer, and extending linearly in the second direction and arranged in parallel to one another in the first direction; N first switching elements formed at least on part of said monocrystalline semiconductor layer and electrically connected, respectively, to said N sense lines; and M second switching elements formed at least on part of said monocrystalline semiconductor layer and electrically connected, respectively, to said M word lines. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification