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US 12,628,569 B2Granted
Light detection element having first and second ferromagnetic layers sandwiching spacer layer and receiving device
AssigneeTDK Corporation
InventorsTetsuya Shibata, Hideaki Fukuzawa, Tomohito Mizuno, Arata Tsukamoto, Yuichi Kasatani
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Abstract
A light detection element include: a magnetic element, a capacitor, and a resistor, wherein the magnetic element and the capacitor are connected in series, the resistor is connected to the magnetic element and the capacitor in parallel, the magnetic element includes a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, and the magnetic element is configured to be irradiated with a light containing an optical signal with a change of intensity of the light.
Claims6
A light detection element comprising:
- a magnetic element, a capacitor, and a resistor,
- wherein the magnetic element and the capacitor are connected in series,
- the resistor is connected to the magnetic element and the capacitor in parallel,
- the magnetic element includes a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, and
- the magnetic element is configured to be irradiated with a light containing an optical signal with a change of intensity of the light;
- the light detection element further comprising a third electrode layer and a second dielectric body,
- wherein the magnetic element has a first surface and a second surface opposing each other in a laminating direction of the magnetic element,
- a position of the second dielectric body is between the third electrode layer and the second surface in the laminating direction, and
- the second dielectric body and the third electrode layer constitute at least a part of the capacitor;
- and
- the light detection element further comprising a second connecting via and a fourth electrode layer,
- wherein the resistor is connected to the third electrode layer branched off from the third electrode layer at a connecting part and the resistor is located between the connecting part and the second connecting via, and
- the fourth electrode layer is electrically connected to the first surface and the second connecting via, and electrically connected to the third electrode layer via the second connecting via and the resistor.
10 more elements
A receiving device comprising a magnetic element and a circuit,
- wherein the circuit includes a capacitor connected to the magnetic element in series, and a resistor connected to the magnetic element and the capacitor in parallel,
- wherein the magnetic element includes a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer,
- the magnetic element is configured to be irradiated with a light containing an optical signal with a change of intensity of the light,
- the circuit is connected to the magnetic element and is configured to output a voltage with a magnitude corresponding to an amount of change per unit time of an output voltage output from the magnetic element according to the optical signal, and
- the receiving device is configured to receive the optical signal on a basis of the voltage output from the circuit;
- the receiving device further comprising a third electrode layer and a second dielectric body,
- wherein the magnetic element has a first surface and a second surface opposing each other in a laminating direction of the magnetic element,
- a position of the second dielectric body is between the third electrode layer and the second surface in the laminating direction, and
- the second dielectric body and the third electrode layer constitute at least a part of the capacitor;
- and
- the receiving device further comprising a second connecting via and a fourth electrode layer,
- wherein the resistor is connected to the third electrode layer branched off from the third electrode layer at a connecting part and the resistor is located between the connecting part and the second connecting via, and
- the fourth electrode layer is electrically connected to the first surface and the second connecting via, and electrically connected to the third electrode layer via the second connecting via and the resistor.
10 more elements
Dependencies are inferred from the claim text.