Stacked Two-Chip Ion Trap for Lower Voltage and RF Isolation
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Solution Overview
Problem
Existing ion traps face challenges in manufacturing complexity, alignment precision, interference from high-frequency voltages, and reduced detection angles for emitted photons, particularly in chip-based designs.
Innovation Solution
A simplified ion trap design using two structurally identical chips with specific electrode arrangements minimizes manufacturing complexity, reduces voltage requirements, minimizes interference, and enhances photon detection angles, while maintaining efficient ion confinement and manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If four microchips are used to build the ion trap, then the ion confinement performance is improved, but the manufacturing complexity and alignment precision are worsened
Solution Approach 1:
The ion trap is divided into two separate chips (first chip and second chip) rather than four chips. Each chip contains specific electrodes (DC electrodes on first chip, RF electrodes on second chip), reducing the total number of components while maintaining the functional segmentation needed for ion confinement and manipulation.
Solution Approach 2:
Multiple electrode functions are integrated onto two chips instead of four. The first chip combines ground electrodes and DC electrodes, while the second chip combines RF electrodes and additional ground electrodes, merging what would have been separate components into integrated chip structures.
2Reliability
If four microchips are used to build the ion trap, then the ion confinement performance is improved, but the alignment precision is worsened
Solution Approach 1:
The trap is segmented into two chips with well-defined functional zones. The first chip handles DC confinement potentials while the second chip handles RF trapping, creating a simpler alignment interface between two chips rather than four, reducing cumulative alignment errors.
3Reliability
If high-frequency voltage is applied to RF electrodes, then ion trapping is achieved, but interference with other electrodes is increased
Solution Approach 1:
The RF electrodes are extracted and placed on a separate second chip, physically isolated from the DC and ground electrodes on the first chip. This spatial separation prevents high-frequency voltage interference from coupling into the DC electrode system, eliminating the harmful interference effect.
Solution Approach 2:
A ground electrode layer is positioned between the RF electrodes on the second chip and the DC electrodes on the first chip, acting as an electromagnetic shield that blocks high-frequency interference from affecting the DC electrode system while allowing the RF trapping field to function effectively.
4Ease of manufacture
If the ion trap structure is simplified, then manufacturing is easier, but the detection angle for emitted photons is reduced
Solution Approach 1:
The ion trap electrodes are arranged in a nested configuration where RF electrodes on the second chip are positioned to work in conjunction with DC electrodes on the first chip, creating a compact structure that maintains open detection angles while simplifying manufacturing to only two chips.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves easier alignment, lower voltage application, reduced interference, and improved photon detection, resulting in a more efficient and precise ion trapping and manipulation process.
Implementation Method 1
at least one charged particle is radially confined using a quadropole radio frequency field
Implementation Method 2
additional electrodes are provided by means of which ions can be confined along a longitudinal axis by applying DC voltages
Implementation Method 3
Due to autoresonance between the AC drive frequency and the ions' natural frequencies, the mass-dependent oscillation amplitudes of the excited ions increase with increasing energy
Data Source
Figure 1a~1b
Figure 2
AI summary
The invention describes an ion trap (10) with two stacked chips (12, 14), each having a slot that is also stacked on top of the other. Electrodes are applied to the edges of the chips adjacent to the respective slots. At least one electrode extends from the back of a chip around an edge to the front and is separated from another electrode by an insulating strip on the chip. This reduces the voltage that must be applied to the electrode used to form the trap volume.