| CPC G06N 10/40 (2022.01) [G21K 1/003 (2013.01)] | 18 Claims |

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1. A device for controlling trapped ions, the device comprising:
a substrate;
a first metal layer disposed over the substrate;
an insulating layer disposed over the first metal layer; and
a structured second metal layer disposed over the insulating layer, the structured second metal layer comprising an electrode of an ion trap configured to trap ions in a space above the structured second metal layer, the electrode of the structured second metal layer and the first metal layer overlapping each other; and
a void space in the insulating layer between the first metal layer and the electrode of the structured second metal layer, the void space comprising a vacuum at least during operation of the device.
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